diff --git a/Makefile.objs b/Makefile.objs index d8b44a2d3c28a..44f4c13e4026a 100644 --- a/Makefile.objs +++ b/Makefile.objs @@ -245,6 +245,7 @@ trace-events-subdirs += target/s390x trace-events-subdirs += target/ppc trace-events-subdirs += qom trace-events-subdirs += linux-user +trace-events-subdirs += darwin-user trace-events-subdirs += qapi trace-events-subdirs += accel/tcg trace-events-subdirs += accel/kvm diff --git a/Makefile.target b/Makefile.target index 6549481096935..80001587dd307 100644 --- a/Makefile.target +++ b/Makefile.target @@ -129,6 +129,20 @@ obj-y += gdbstub.o endif #CONFIG_BSD_USER +######################################################### +# macOS user emulator target + +ifdef CONFIG_DARWIN_USER + +QEMU_CFLAGS+=-I$(SRC_PATH)/darwin-user/$(TARGET_ABI_DIR) \ + -I$(SRC_PATH)/darwin-user/host/$(ARCH) \ + -I$(SRC_PATH)/darwin-user + +obj-y += darwin-user/ +obj-y += gdbstub.o thunk.o + +endif #CONFIG_DARWIN_USER + ######################################################### # System emulator target ifdef CONFIG_SOFTMMU diff --git a/README.md b/README.md index 7716f01d6881b..1ab896ea1dd8e 100644 --- a/README.md +++ b/README.md @@ -1,9 +1,9 @@ This QEMU patch introduces irix/solaris userland emulation. It currently runs -only under linux (though BSD support would probably be feasable). +only under linux and macOS (though BSD support would probably be feasable). ### compiling -Configure QEMU for irix/solaris userland emulation and compile (see the original +Configure QEMU for irix/solaris userland emulation for linux and compile (see the original QEMU README for further instructions): ``` @@ -11,6 +11,22 @@ configure --target-list=irix-linux-user,irixn32-linux-user,irix64-linux-user,sol make && make install ``` +Or, configure QEMU for irix userland emulatin for macOS + +``` +./configure --target-list=irix-darwin-user \ + --disable-vnc \ + --disable-sdl \ + --disable-gtk \ + --disable-cocoa \ + --disable-opengl \ + --disable-capstone \ + --disable-hax \ + --disable-hvf \ + --disable-tools +make +``` + ### using I recommend using binfmt. I have prepared some scripts for this which you can diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 67795cd78c00e..838f1b8c6c403 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -430,7 +430,8 @@ static void page_init(void) #else FILE *f; - last_brk = (unsigned long)sbrk(0); + // depreciated in osx, but value is not used? + //last_brk = (unsigned long)sbrk(0); f = fopen("/compat/linux/proc/self/maps", "r"); if (f) { @@ -602,8 +603,27 @@ static inline void *split_cross_256mb(void *buf1, size_t size1) return buf1; } #endif - #ifdef USE_STATIC_CODE_GEN_BUFFER +#if defined(CONFIG_DARWIN_USER) +static inline void *alloc_code_gen_buffer(void) +{ + int prot = PROT_WRITE | PROT_READ | PROT_EXEC; + int flags = MAP_PRIVATE | MAP_ANON; + /* let a kernel pick an address close to the executable */ + uintptr_t start = 0; + /* Honor a command-line option limiting the size of the buffer. */ + size_t size = DEFAULT_CODE_GEN_BUFFER_SIZE; + void *buf; + + buf = mmap((void *)start, size, prot, flags, -1, 0); + if (buf == MAP_FAILED) { + return NULL; + } + + qemu_madvise(buf, size, QEMU_MADV_HUGEPAGE); + return buf; +} +#else /* !CONFIG_DARWIN_USER */ static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] __attribute__((aligned(CODE_GEN_ALIGN))); @@ -640,6 +660,8 @@ static inline void *alloc_code_gen_buffer(void) return buf; } +#endif /* CONFIG_DARWIN_USER */ + #elif defined(_WIN32) static inline void *alloc_code_gen_buffer(void) { diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index 77899584f27f2..707171895b06e 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -244,6 +244,11 @@ int cpu_signal_handler(int host_signum, void *pinfo, #define TRAP_sig(context) ((context)->sc_trapno) #define ERROR_sig(context) ((context)->sc_err) #define MASK_sig(context) ((context)->sc_mask) +#elif defined(__APPLE__) +#define PC_sig(context) ((context)->uc_mcontext->__ss.__rip) +#define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno) +#define ERROR_sig(context) ((context)->uc_mcontext->__es.__err) +#define MASK_sig(context) ((context)->uc_sigmask) #elif defined(__FreeBSD__) || defined(__DragonFly__) #include diff --git a/configure b/configure index bbf8956db2f3c..6c77a9a4e7e25 100755 --- a/configure +++ b/configure @@ -249,6 +249,12 @@ supported_target() { return 1 fi ;; + *-darwin-user) + if test "$darwin" != "yes"; then + print_error "Target '$target' is only available on a Darwin host" + return 1 + fi + ;; *) print_error "Invalid target name '$target'" return 1 @@ -390,6 +396,7 @@ cocoa="no" softmmu="yes" linux_user="no" bsd_user="no" +darwin_user="no" blobs="yes" pkgversion="" pie="" @@ -766,6 +773,7 @@ OpenBSD) Darwin) bsd="yes" darwin="yes" + darwin_user="yes" hax="yes" hvf="yes" LDFLAGS_SHARED="-bundle -undefined dynamic_lookup" @@ -1119,6 +1127,7 @@ for opt do --disable-user) linux_user="no" ; bsd_user="no" ; + darwin_user="no" ; ;; --enable-user) ;; --disable-linux-user) linux_user="no" @@ -1129,6 +1138,10 @@ for opt do ;; --enable-bsd-user) bsd_user="yes" ;; + --disable-darwin-user) darwin_user="no" + ;; + --enable-darwin-user) darwin_user="yes" + ;; --enable-pie) pie="yes" ;; --disable-pie) pie="no" @@ -1439,6 +1452,7 @@ QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS" if [ "$ARCH" = "unknown" ]; then bsd_user="no" linux_user="no" + darwin_user="no" fi default_target_list="" @@ -1454,6 +1468,10 @@ fi if [ "$bsd_user" = "yes" ]; then mak_wilds="${mak_wilds} $source_path/default-configs/*-bsd-user.mak" fi +if [ "$darwin_user" = "yes" ]; then + mak_wilds="${mak_wilds} $source_path/default-configs/*-darwin-user.mak" +fi + for config in $mak_wilds; do default_target_list="${default_target_list} $(basename "$config" .mak)" @@ -1548,6 +1566,7 @@ disabled with --disable-FEATURE, default is enabled if available: user supported user emulation targets linux-user all linux usermode emulation targets bsd-user all BSD usermode emulation targets + darwin-user all MacOS usermode emulation targets docs build documentation guest-agent build the QEMU Guest Agent guest-agent-msi build guest agent Windows MSI installation package @@ -5577,7 +5596,7 @@ if test "$cpu" = "s390x" ; then fi # Probe for the need for relocating the user-only binary. -if ( [ "$linux_user" = yes ] || [ "$bsd_user" = yes ] ) && [ "$pie" = no ]; then +if ( [ "$linux_user" = yes ] || [ "$bsd_user" = yes ] || [ "$darwin_user" = yes ] ) && [ "$pie" = no ]; then textseg_addr= case "$cpu" in arm | i386 | ppc* | s390* | sparc* | x86_64 | x32) @@ -5590,31 +5609,53 @@ if ( [ "$linux_user" = yes ] || [ "$bsd_user" = yes ] ) && [ "$pie" = no ]; then textseg_addr=0x60000000 ;; esac + if [ -n "$textseg_addr" ]; then cat > $TMPC </dev/null 2>&1; then - error_exit \ - "We need to link the QEMU user mode binaries at a" \ - "specific text address. Unfortunately your linker" \ - "doesn't support either the -Ttext-segment option or" \ - "printing the default linker script with --verbose." \ - "If you don't want the user mode binaries, pass the" \ - "--disable-user option to configure." - fi + # 64bit macOS reserves 4GB for page zero to catch truncated pointer to int casts. + # Follow suggested Wine configuration from: + # https://stackoverflow.com/questions/46916112/osx-ld-why-does-pagezero-size-default-to-4gb-on-64b-osx + if [ "$darwin_user" = yes ] ; then + pz_size_flag=",-pagezero_size,0x1000" + else + pz_size_flag="" + fi + # Check three different sets of ld flags: + # default_... for standard gnu ld (Linux) + # clang_... for llvm clang + # macos_... for macOS built-in ld + # If none of the above options are supported, edit the default linker + # script via sed to set the .text start addr. This is needed on FreeBSD + # at least. + default_ldflags="-Wl,-Ttext-segment=$textseg_addr" + clang_ldflags="-Wl,-image-base,${textseg_addr}${pz_size_flag}" + macos_ldflags="-Wl,-image_base,${textseg_addr}${pz_size_flag}" + + if compile_prog "" "$default_ldflags"; then + textseg_ldflags="$default_ldflags" + elif compile_prog "" "$clang_ldflags"; then + textseg_ldflags="$clang_ldflags" + elif compile_prog "" "$macos_ldflags"; then + textseg_ldflags="$macos_ldflags" + elif $ld --verbose >/dev/null 2>&1; then $ld --verbose | sed \ -e '1,/==================================================/d' \ -e '/==================================================/,$d' \ -e "s/[.] = [0-9a-fx]* [+] SIZEOF_HEADERS/. = $textseg_addr + SIZEOF_HEADERS/" \ -e "s/__executable_start = [0-9a-fx]*/__executable_start = $textseg_addr/" > config-host.ld textseg_ldflags="-Wl,-T../config-host.ld" + else + error_exit \ + "We need to link the QEMU user mode binaries at a" \ + "specific text address. Unfortunately your linker" \ + "doesn't support either the -Ttext-segment option," \ + "-image_base, -image-base, or printing the default" \ + "linker script with --verbose." \ + "If you don't want the user mode binaries, pass the" \ + "--disable-user option to configure." fi fi fi @@ -6677,6 +6718,7 @@ target_softmmu="no" target_user_only="no" target_linux_user="no" target_bsd_user="no" +target_darwin_user="no" case "$target" in ${target_name}-softmmu) target_softmmu="yes" @@ -6689,6 +6731,10 @@ case "$target" in target_user_only="yes" target_bsd_user="yes" ;; + ${target_name}-darwin-user) + target_user_only="yes" + target_darwin_user="yes" + ;; *) error_exit "Target '$target' not recognised" exit 1 @@ -6936,6 +6982,9 @@ fi if test "$target_linux_user" = "yes" ; then echo "CONFIG_LINUX_USER=y" >> $config_target_mak fi +if test "$target_darwin_user" = "yes" ; then + echo "CONFIG_DARWIN_USER=y" >> $config_target_mak +fi list="" if test ! -z "$gdb_xml_files" ; then for x in $gdb_xml_files; do @@ -7050,7 +7099,7 @@ if test "$gprof" = "yes" ; then fi fi -if test "$target_linux_user" = "yes" -o "$target_bsd_user" = "yes" ; then +if test "$target_linux_user" = "yes" -o "$target_bsd_user" = "yes" -o "$target_darwin_user" = "yes" ; then ldflags="$ldflags $textseg_ldflags" fi diff --git a/darwin-user/Makefile.objs b/darwin-user/Makefile.objs new file mode 100644 index 0000000000000..f8bcfb707f8ea --- /dev/null +++ b/darwin-user/Makefile.objs @@ -0,0 +1,8 @@ +obj-y = main.o syscall.o strace.o mmap.o signal.o \ + elfload.o linuxload.o uaccess.o uname.o \ + shim_fallocate.o shim_gettid.o shim_timers.o + +obj-$(TARGET_HAS_BFLT) += flatload.o +obj-$(TARGET_I386) += vm86.o +obj-$(TARGET_ARM) += arm/nwfpe/ +obj-$(TARGET_M68K) += m68k-sim.o diff --git a/darwin-user/elfload.c b/darwin-user/elfload.c new file mode 100644 index 0000000000000..7a670f05b0920 --- /dev/null +++ b/darwin-user/elfload.c @@ -0,0 +1,3555 @@ +/* This is the Linux kernel elf-loading code, ported into user space */ +#include "qemu/osdep.h" +#include + +#include + +#include "qemu.h" +#include "disas/disas.h" +#include "qemu/path.h" + +#ifdef _ARCH_PPC64 +#undef ARCH_DLINFO +#undef ELF_PLATFORM +#undef ELF_HWCAP +#undef ELF_HWCAP2 +#undef ELF_CLASS +#undef ELF_DATA +#undef ELF_ARCH +#endif + +#define ELF_OSABI ELFOSABI_SYSV + +/* from personality.h */ + +/* + * Flags for bug emulation. + * + * These occupy the top three bytes. + */ +enum { + ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ + FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to + descriptors (signal handling) */ + MMAP_PAGE_ZERO = 0x0100000, + ADDR_COMPAT_LAYOUT = 0x0200000, + READ_IMPLIES_EXEC = 0x0400000, + ADDR_LIMIT_32BIT = 0x0800000, + SHORT_INODE = 0x1000000, + WHOLE_SECONDS = 0x2000000, + STICKY_TIMEOUTS = 0x4000000, + ADDR_LIMIT_3GB = 0x8000000, +}; + +/* + * Personality types. + * + * These go in the low byte. Avoid using the top bit, it will + * conflict with error returns. + */ +enum { + PER_LINUX = 0x0000, + PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, + PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, + PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, + PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE, + PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, + PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, + PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, + PER_BSD = 0x0006, + PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, + PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, + PER_LINUX32 = 0x0008, + PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, + PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ + PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ + PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ + PER_RISCOS = 0x000c, + PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, + PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_OSF4 = 0x000f, /* OSF/1 v4 */ + PER_HPUX = 0x0010, + PER_MASK = 0x00ff, +}; + +/* + * Return the base personality without flags. + */ +#define personality(pers) (pers & PER_MASK) + +/* this flag is uneffective under linux too, should be deleted */ +#ifndef MAP_DENYWRITE +#define MAP_DENYWRITE 0 +#endif + +/* should probably go in elf.h */ +#ifndef ELIBBAD +#define ELIBBAD 80 +#endif + +#ifdef TARGET_WORDS_BIGENDIAN +#define ELF_DATA ELFDATA2MSB +#else +#define ELF_DATA ELFDATA2LSB +#endif + +#ifdef TARGET_ABI_MIPSN32 +typedef abi_ullong target_elf_greg_t; +#define tswapreg(ptr) tswap64(ptr) +#else +typedef abi_ulong target_elf_greg_t; +#define tswapreg(ptr) tswapal(ptr) +#endif + +#ifdef USE_UID16 +typedef abi_ushort target_uid_t; +typedef abi_ushort target_gid_t; +#else +typedef abi_uint target_uid_t; +typedef abi_uint target_gid_t; +#endif +typedef abi_int target_pid_t; + +#ifdef TARGET_I386 + +#define ELF_PLATFORM get_elf_platform() + +static const char *get_elf_platform(void) +{ + static char elf_platform[] = "i386"; + int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL); + if (family > 6) + family = 6; + if (family >= 3) + elf_platform[1] = '0' + family; + return elf_platform; +} + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + X86CPU *cpu = X86_CPU(thread_cpu); + + return cpu->env.features[FEAT_1_EDX]; +} + +#ifdef TARGET_X86_64 +#define ELF_START_MMAP 0x2aaaaab000ULL + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_X86_64 + +static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->rax = 0; + regs->rsp = infop->start_stack; + regs->rip = infop->entry; +} + +#define ELF_NREG 27 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* + * Note that ELF_NREG should be 29 as there should be place for + * TRAPNO and ERR "registers" as well but linux doesn't dump + * those. + * + * See linux kernel: arch/x86/include/asm/elf.h + */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env) +{ + (*regs)[0] = env->regs[15]; + (*regs)[1] = env->regs[14]; + (*regs)[2] = env->regs[13]; + (*regs)[3] = env->regs[12]; + (*regs)[4] = env->regs[R_EBP]; + (*regs)[5] = env->regs[R_EBX]; + (*regs)[6] = env->regs[11]; + (*regs)[7] = env->regs[10]; + (*regs)[8] = env->regs[9]; + (*regs)[9] = env->regs[8]; + (*regs)[10] = env->regs[R_EAX]; + (*regs)[11] = env->regs[R_ECX]; + (*regs)[12] = env->regs[R_EDX]; + (*regs)[13] = env->regs[R_ESI]; + (*regs)[14] = env->regs[R_EDI]; + (*regs)[15] = env->regs[R_EAX]; /* XXX */ + (*regs)[16] = env->eip; + (*regs)[17] = env->segs[R_CS].selector & 0xffff; + (*regs)[18] = env->eflags; + (*regs)[19] = env->regs[R_ESP]; + (*regs)[20] = env->segs[R_SS].selector & 0xffff; + (*regs)[21] = env->segs[R_FS].selector & 0xffff; + (*regs)[22] = env->segs[R_GS].selector & 0xffff; + (*regs)[23] = env->segs[R_DS].selector & 0xffff; + (*regs)[24] = env->segs[R_ES].selector & 0xffff; + (*regs)[25] = env->segs[R_FS].selector & 0xffff; + (*regs)[26] = env->segs[R_GS].selector & 0xffff; +} + +#else + +#define ELF_START_MMAP 0x80000000 + +/* + * This is used to ensure we don't load something for the wrong architecture. + */ +#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) + +/* + * These are used to set parameters in the core dumps. + */ +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_386 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->esp = infop->start_stack; + regs->eip = infop->entry; + + /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program + starts %edx contains a pointer to a function which might be + registered using `atexit'. This provides a mean for the + dynamic linker to call DT_FINI functions for shared libraries + that have been loaded before the code runs. + + A value of 0 tells we have no such handler. */ + regs->edx = 0; +} + +#define ELF_NREG 17 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* + * Note that ELF_NREG should be 19 as there should be place for + * TRAPNO and ERR "registers" as well but linux doesn't dump + * those. + * + * See linux kernel: arch/x86/include/asm/elf.h + */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env) +{ + (*regs)[0] = env->regs[R_EBX]; + (*regs)[1] = env->regs[R_ECX]; + (*regs)[2] = env->regs[R_EDX]; + (*regs)[3] = env->regs[R_ESI]; + (*regs)[4] = env->regs[R_EDI]; + (*regs)[5] = env->regs[R_EBP]; + (*regs)[6] = env->regs[R_EAX]; + (*regs)[7] = env->segs[R_DS].selector & 0xffff; + (*regs)[8] = env->segs[R_ES].selector & 0xffff; + (*regs)[9] = env->segs[R_FS].selector & 0xffff; + (*regs)[10] = env->segs[R_GS].selector & 0xffff; + (*regs)[11] = env->regs[R_EAX]; /* XXX */ + (*regs)[12] = env->eip; + (*regs)[13] = env->segs[R_CS].selector & 0xffff; + (*regs)[14] = env->eflags; + (*regs)[15] = env->regs[R_ESP]; + (*regs)[16] = env->segs[R_SS].selector & 0xffff; +} +#endif + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif + +#ifdef TARGET_ARM + +#ifndef TARGET_AARCH64 +/* 32 bit ARM definitions */ + +#define ELF_START_MMAP 0x80000000 + +#define ELF_ARCH EM_ARM +#define ELF_CLASS ELFCLASS32 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + + regs->uregs[16] = ARM_CPU_MODE_USR; + if (infop->entry & 1) { + regs->uregs[16] |= CPSR_T; + } + regs->uregs[15] = infop->entry & 0xfffffffe; + regs->uregs[13] = infop->start_stack; + /* FIXME - what to for failure of get_user()? */ + get_user_ual(regs->uregs[2], stack + 8); /* envp */ + get_user_ual(regs->uregs[1], stack + 4); /* envp */ + /* XXX: it seems that r0 is zeroed after ! */ + regs->uregs[0] = 0; + /* For uClinux PIC binaries. */ + /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ + regs->uregs[10] = infop->start_data; +} + +#define ELF_NREG 18 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env) +{ + (*regs)[0] = tswapreg(env->regs[0]); + (*regs)[1] = tswapreg(env->regs[1]); + (*regs)[2] = tswapreg(env->regs[2]); + (*regs)[3] = tswapreg(env->regs[3]); + (*regs)[4] = tswapreg(env->regs[4]); + (*regs)[5] = tswapreg(env->regs[5]); + (*regs)[6] = tswapreg(env->regs[6]); + (*regs)[7] = tswapreg(env->regs[7]); + (*regs)[8] = tswapreg(env->regs[8]); + (*regs)[9] = tswapreg(env->regs[9]); + (*regs)[10] = tswapreg(env->regs[10]); + (*regs)[11] = tswapreg(env->regs[11]); + (*regs)[12] = tswapreg(env->regs[12]); + (*regs)[13] = tswapreg(env->regs[13]); + (*regs)[14] = tswapreg(env->regs[14]); + (*regs)[15] = tswapreg(env->regs[15]); + + (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env)); + (*regs)[17] = tswapreg(env->regs[0]); /* XXX */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum +{ + ARM_HWCAP_ARM_SWP = 1 << 0, + ARM_HWCAP_ARM_HALF = 1 << 1, + ARM_HWCAP_ARM_THUMB = 1 << 2, + ARM_HWCAP_ARM_26BIT = 1 << 3, + ARM_HWCAP_ARM_FAST_MULT = 1 << 4, + ARM_HWCAP_ARM_FPA = 1 << 5, + ARM_HWCAP_ARM_VFP = 1 << 6, + ARM_HWCAP_ARM_EDSP = 1 << 7, + ARM_HWCAP_ARM_JAVA = 1 << 8, + ARM_HWCAP_ARM_IWMMXT = 1 << 9, + ARM_HWCAP_ARM_CRUNCH = 1 << 10, + ARM_HWCAP_ARM_THUMBEE = 1 << 11, + ARM_HWCAP_ARM_NEON = 1 << 12, + ARM_HWCAP_ARM_VFPv3 = 1 << 13, + ARM_HWCAP_ARM_VFPv3D16 = 1 << 14, + ARM_HWCAP_ARM_TLS = 1 << 15, + ARM_HWCAP_ARM_VFPv4 = 1 << 16, + ARM_HWCAP_ARM_IDIVA = 1 << 17, + ARM_HWCAP_ARM_IDIVT = 1 << 18, + ARM_HWCAP_ARM_VFPD32 = 1 << 19, + ARM_HWCAP_ARM_LPAE = 1 << 20, + ARM_HWCAP_ARM_EVTSTRM = 1 << 21, +}; + +enum { + ARM_HWCAP2_ARM_AES = 1 << 0, + ARM_HWCAP2_ARM_PMULL = 1 << 1, + ARM_HWCAP2_ARM_SHA1 = 1 << 2, + ARM_HWCAP2_ARM_SHA2 = 1 << 3, + ARM_HWCAP2_ARM_CRC32 = 1 << 4, +}; + +/* The commpage only exists for 32 bit kernels */ + +#define TARGET_HAS_VALIDATE_GUEST_SPACE +/* Return 1 if the proposed guest space is suitable for the guest. + * Return 0 if the proposed guest space isn't suitable, but another + * address space should be tried. + * Return -1 if there is no way the proposed guest space can be + * valid regardless of the base. + * The guest code may leave a page mapped and populate it if the + * address is suitable. + */ +static int validate_guest_space(unsigned long guest_base, + unsigned long guest_size) +{ + unsigned long real_start, test_page_addr; + + /* We need to check that we can force a fault on access to the + * commpage at 0xffff0fxx + */ + test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask); + + /* If the commpage lies within the already allocated guest space, + * then there is no way we can allocate it. + */ + if (test_page_addr >= guest_base + && test_page_addr < (guest_base + guest_size)) { + return -1; + } + + /* Note it needs to be writeable to let us initialise it */ + real_start = (unsigned long) + mmap((void *)test_page_addr, qemu_host_page_size, + PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + + /* If we can't map it then try another address */ + if (real_start == -1ul) { + return 0; + } + + if (real_start != test_page_addr) { + /* OS didn't put the page where we asked - unmap and reject */ + munmap((void *)real_start, qemu_host_page_size); + return 0; + } + + /* Leave the page mapped + * Populate it (mmap should have left it all 0'd) + */ + + /* Kernel helper versions */ + __put_user(5, (uint32_t *)g2h(0xffff0ffcul)); + + /* Now it's populated make it RO */ + if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) { + perror("Protecting guest commpage"); + exit(-1); + } + + return 1; /* All good */ +} + +#define ELF_HWCAP get_elf_hwcap() +#define ELF_HWCAP2 get_elf_hwcap2() + +static uint32_t get_elf_hwcap(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + hwcaps |= ARM_HWCAP_ARM_SWP; + hwcaps |= ARM_HWCAP_ARM_HALF; + hwcaps |= ARM_HWCAP_ARM_THUMB; + hwcaps |= ARM_HWCAP_ARM_FAST_MULT; + + /* probe for the extra features */ +#define GET_FEATURE(feat, hwcap) \ + do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0) + /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */ + GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP); + GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP); + GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT); + GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE); + GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON); + GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3); + GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS); + GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4); + GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA); + GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT); + /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c. + * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of + * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated + * to our VFP_FP16 feature bit. + */ + GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32); + GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE); + + return hwcaps; +} + +static uint32_t get_elf_hwcap2(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES); + GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL); + GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1); + GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2); + GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32); + return hwcaps; +} + +#undef GET_FEATURE + +#else +/* 64 bit ARM definitions */ +#define ELF_START_MMAP 0x80000000 + +#define ELF_ARCH EM_AARCH64 +#define ELF_CLASS ELFCLASS64 +#define ELF_PLATFORM "aarch64" + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + + regs->pc = infop->entry & ~0x3ULL; + regs->sp = stack; +} + +#define ELF_NREG 34 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUARMState *env) +{ + int i; + + for (i = 0; i < 32; i++) { + (*regs)[i] = tswapreg(env->xregs[i]); + } + (*regs)[32] = tswapreg(env->pc); + (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env)); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum { + ARM_HWCAP_A64_FP = 1 << 0, + ARM_HWCAP_A64_ASIMD = 1 << 1, + ARM_HWCAP_A64_EVTSTRM = 1 << 2, + ARM_HWCAP_A64_AES = 1 << 3, + ARM_HWCAP_A64_PMULL = 1 << 4, + ARM_HWCAP_A64_SHA1 = 1 << 5, + ARM_HWCAP_A64_SHA2 = 1 << 6, + ARM_HWCAP_A64_CRC32 = 1 << 7, + ARM_HWCAP_A64_ATOMICS = 1 << 8, + ARM_HWCAP_A64_FPHP = 1 << 9, + ARM_HWCAP_A64_ASIMDHP = 1 << 10, + ARM_HWCAP_A64_CPUID = 1 << 11, + ARM_HWCAP_A64_ASIMDRDM = 1 << 12, + ARM_HWCAP_A64_JSCVT = 1 << 13, + ARM_HWCAP_A64_FCMA = 1 << 14, + ARM_HWCAP_A64_LRCPC = 1 << 15, + ARM_HWCAP_A64_DCPOP = 1 << 16, + ARM_HWCAP_A64_SHA3 = 1 << 17, + ARM_HWCAP_A64_SM3 = 1 << 18, + ARM_HWCAP_A64_SM4 = 1 << 19, + ARM_HWCAP_A64_ASIMDDP = 1 << 20, + ARM_HWCAP_A64_SHA512 = 1 << 21, + ARM_HWCAP_A64_SVE = 1 << 22, +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + hwcaps |= ARM_HWCAP_A64_FP; + hwcaps |= ARM_HWCAP_A64_ASIMD; + + /* probe for the extra features */ +#define GET_FEATURE(feat, hwcap) \ + do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0) + GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES); + GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL); + GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1); + GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2); + GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32); + GET_FEATURE(ARM_FEATURE_V8_SHA3, ARM_HWCAP_A64_SHA3); + GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3); + GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4); + GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512); + GET_FEATURE(ARM_FEATURE_V8_FP16, + ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP); + GET_FEATURE(ARM_FEATURE_V8_RDM, ARM_HWCAP_A64_ASIMDRDM); + GET_FEATURE(ARM_FEATURE_V8_FCMA, ARM_HWCAP_A64_FCMA); +#undef GET_FEATURE + + return hwcaps; +} + +#endif /* not TARGET_AARCH64 */ +#endif /* TARGET_ARM */ + +#ifdef TARGET_UNICORE32 + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_DATA ELFDATA2LSB +#define ELF_ARCH EM_UNICORE32 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + regs->UC32_REG_asr = 0x10; + regs->UC32_REG_pc = infop->entry & 0xfffffffe; + regs->UC32_REG_sp = infop->start_stack; + /* FIXME - what to for failure of get_user()? */ + get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */ + get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */ + /* XXX: it seems that r0 is zeroed after ! */ + regs->UC32_REG_00 = 0; +} + +#define ELF_NREG 34 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env) +{ + (*regs)[0] = env->regs[0]; + (*regs)[1] = env->regs[1]; + (*regs)[2] = env->regs[2]; + (*regs)[3] = env->regs[3]; + (*regs)[4] = env->regs[4]; + (*regs)[5] = env->regs[5]; + (*regs)[6] = env->regs[6]; + (*regs)[7] = env->regs[7]; + (*regs)[8] = env->regs[8]; + (*regs)[9] = env->regs[9]; + (*regs)[10] = env->regs[10]; + (*regs)[11] = env->regs[11]; + (*regs)[12] = env->regs[12]; + (*regs)[13] = env->regs[13]; + (*regs)[14] = env->regs[14]; + (*regs)[15] = env->regs[15]; + (*regs)[16] = env->regs[16]; + (*regs)[17] = env->regs[17]; + (*regs)[18] = env->regs[18]; + (*regs)[19] = env->regs[19]; + (*regs)[20] = env->regs[20]; + (*regs)[21] = env->regs[21]; + (*regs)[22] = env->regs[22]; + (*regs)[23] = env->regs[23]; + (*regs)[24] = env->regs[24]; + (*regs)[25] = env->regs[25]; + (*regs)[26] = env->regs[26]; + (*regs)[27] = env->regs[27]; + (*regs)[28] = env->regs[28]; + (*regs)[29] = env->regs[29]; + (*regs)[30] = env->regs[30]; + (*regs)[31] = env->regs[31]; + + (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env); + (*regs)[33] = env->regs[0]; /* XXX */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64) + +#endif + +#ifdef TARGET_SPARC +#ifdef TARGET_SPARC64 + +#define ELF_START_MMAP 0x80000000 +#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ + | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9) +#ifndef TARGET_ABI32 +#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS ) +#else +#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC ) +#endif + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_SPARCV9 + +#define STACK_BIAS 2047 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ +#ifndef TARGET_ABI32 + regs->tstate = 0; +#endif + regs->pc = infop->entry; + regs->npc = regs->pc + 4; + regs->y = 0; +#ifdef TARGET_ABI32 + regs->u_regs[14] = infop->start_stack - 16 * 4; +#else + if (personality(infop->personality) == PER_LINUX32) + regs->u_regs[14] = infop->start_stack - 16 * 4; + else + regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; +#endif +} + +#else +#define ELF_START_MMAP 0x80000000 +#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ + | HWCAP_SPARC_MULDIV) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_SPARC + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->psr = 0; + regs->pc = infop->entry; + regs->npc = regs->pc + 4; + regs->y = 0; + regs->u_regs[14] = infop->start_stack - 16 * 4; +} + +#endif + +#ifdef TARGET_ABI_SOLARIS +#define DLINFO_ARCH_ITEMS 1 +#define ARCH_DLINFO \ + do { \ + NEW_AUX_ENT(AT_SUN_LDDATA, (abi_ulong)(interp_info ? interp_info->start_data : 0)); \ + } while (0) +#endif + +#endif + +#ifdef TARGET_PPC + +#define ELF_MACHINE PPC_ELF_MACHINE +#define ELF_START_MMAP 0x80000000 + +#if defined(TARGET_PPC64) && !defined(TARGET_ABI32) + +#define elf_check_arch(x) ( (x) == EM_PPC64 ) + +#define ELF_CLASS ELFCLASS64 + +#else + +#define ELF_CLASS ELFCLASS32 + +#endif + +#define ELF_ARCH EM_PPC + +/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP). + See arch/powerpc/include/asm/cputable.h. */ +enum { + QEMU_PPC_FEATURE_32 = 0x80000000, + QEMU_PPC_FEATURE_64 = 0x40000000, + QEMU_PPC_FEATURE_601_INSTR = 0x20000000, + QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000, + QEMU_PPC_FEATURE_HAS_FPU = 0x08000000, + QEMU_PPC_FEATURE_HAS_MMU = 0x04000000, + QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000, + QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000, + QEMU_PPC_FEATURE_HAS_SPE = 0x00800000, + QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000, + QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000, + QEMU_PPC_FEATURE_NO_TB = 0x00100000, + QEMU_PPC_FEATURE_POWER4 = 0x00080000, + QEMU_PPC_FEATURE_POWER5 = 0x00040000, + QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000, + QEMU_PPC_FEATURE_CELL = 0x00010000, + QEMU_PPC_FEATURE_BOOKE = 0x00008000, + QEMU_PPC_FEATURE_SMT = 0x00004000, + QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000, + QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000, + QEMU_PPC_FEATURE_PA6T = 0x00000800, + QEMU_PPC_FEATURE_HAS_DFP = 0x00000400, + QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200, + QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100, + QEMU_PPC_FEATURE_HAS_VSX = 0x00000080, + QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040, + + QEMU_PPC_FEATURE_TRUE_LE = 0x00000002, + QEMU_PPC_FEATURE_PPC_LE = 0x00000001, + + /* Feature definitions in AT_HWCAP2. */ + QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */ + QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */ + QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */ + QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */ + QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */ + QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */ +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); + uint32_t features = 0; + + /* We don't have to be terribly complete here; the high points are + Altivec/FP/SPE support. Anything else is just a bonus. */ +#define GET_FEATURE(flag, feature) \ + do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0) +#define GET_FEATURE2(flags, feature) \ + do { \ + if ((cpu->env.insns_flags2 & flags) == flags) { \ + features |= feature; \ + } \ + } while (0) + GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); + GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); + GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); + GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); + GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); + GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); + GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); + GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); + GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP); + GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX); + GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 | + PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206), + QEMU_PPC_FEATURE_ARCH_2_06); +#undef GET_FEATURE +#undef GET_FEATURE2 + + return features; +} + +#define ELF_HWCAP2 get_elf_hwcap2() + +static uint32_t get_elf_hwcap2(void) +{ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); + uint32_t features = 0; + +#define GET_FEATURE(flag, feature) \ + do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0) +#define GET_FEATURE2(flag, feature) \ + do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0) + + GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL); + GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR); + GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 | + PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07); + +#undef GET_FEATURE +#undef GET_FEATURE2 + + return features; +} + +/* + * The requirements here are: + * - keep the final alignment of sp (sp & 0xf) + * - make sure the 32-bit value at the first 16 byte aligned position of + * AUXV is greater than 16 for glibc compatibility. + * AT_IGNOREPPC is used for that. + * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, + * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. + */ +#define DLINFO_ARCH_ITEMS 5 +#define ARCH_DLINFO \ + do { \ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \ + /* \ + * Handle glibc compatibility: these magic entries must \ + * be at the lowest addresses in the final auxv. \ + */ \ + NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ + NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ + NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \ + NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \ + NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ + } while (0) + +static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) +{ + _regs->gpr[1] = infop->start_stack; +#if defined(TARGET_PPC64) && !defined(TARGET_ABI32) + if (get_ppc64_abi(infop) < 2) { + uint64_t val; + get_user_u64(val, infop->entry + 8); + _regs->gpr[2] = val + infop->load_bias; + get_user_u64(val, infop->entry); + infop->entry = val + infop->load_bias; + } else { + _regs->gpr[12] = infop->entry; /* r12 set to global entry address */ + } +#endif + _regs->nip = infop->entry; +} + +/* See linux kernel: arch/powerpc/include/asm/elf.h. */ +#define ELF_NREG 48 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env) +{ + int i; + target_ulong ccr = 0; + + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + (*regs)[i] = tswapreg(env->gpr[i]); + } + + (*regs)[32] = tswapreg(env->nip); + (*regs)[33] = tswapreg(env->msr); + (*regs)[35] = tswapreg(env->ctr); + (*regs)[36] = tswapreg(env->lr); + (*regs)[37] = tswapreg(env->xer); + + for (i = 0; i < ARRAY_SIZE(env->crf); i++) { + ccr |= env->crf[i] << (32 - ((i + 1) * 4)); + } + (*regs)[38] = tswapreg(ccr); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif + +#ifdef TARGET_MIPS + +#define ELF_START_MMAP 0x80000000 + +#ifdef TARGET_MIPS64 +#define ELF_CLASS ELFCLASS64 +#else +#define ELF_CLASS ELFCLASS32 +#endif +#define ELF_ARCH EM_MIPS + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->cp0_status = 2 << CP0St_KSU; + regs->cp0_epc = infop->entry; + regs->regs[29] = infop->start_stack; +} + +/* See linux kernel: arch/mips/include/asm/elf.h. */ +#define ELF_NREG 45 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/include/asm/reg.h. */ +enum { +#ifdef TARGET_MIPS64 + TARGET_EF_R0 = 0, +#else + TARGET_EF_R0 = 6, +#endif + TARGET_EF_R26 = TARGET_EF_R0 + 26, + TARGET_EF_R27 = TARGET_EF_R0 + 27, + TARGET_EF_LO = TARGET_EF_R0 + 32, + TARGET_EF_HI = TARGET_EF_R0 + 33, + TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34, + TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35, + TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36, + TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37 +}; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env) +{ + int i; + + for (i = 0; i < TARGET_EF_R0; i++) { + (*regs)[i] = 0; + } + (*regs)[TARGET_EF_R0] = 0; + + for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { + (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]); + } + + (*regs)[TARGET_EF_R26] = 0; + (*regs)[TARGET_EF_R27] = 0; + (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]); + (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]); + (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC); + (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr); + (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status); + (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_MIPS */ + +#ifdef TARGET_MICROBLAZE + +#define ELF_START_MMAP 0x80000000 + +#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_MICROBLAZE + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->r1 = infop->start_stack; + +} + +#define ELF_EXEC_PAGESIZE 4096 + +#define USE_ELF_CORE_DUMP +#define ELF_NREG 38 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env) +{ + int i, pos = 0; + + for (i = 0; i < 32; i++) { + (*regs)[pos++] = tswapreg(env->regs[i]); + } + + for (i = 0; i < 6; i++) { + (*regs)[pos++] = tswapreg(env->sregs[i]); + } +} + +#endif /* TARGET_MICROBLAZE */ + +#ifdef TARGET_NIOS2 + +#define ELF_START_MMAP 0x80000000 + +#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_ALTERA_NIOS2 + +static void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->ea = infop->entry; + regs->sp = infop->start_stack; + regs->estatus = 0x3; +} + +#define ELF_EXEC_PAGESIZE 4096 + +#define USE_ELF_CORE_DUMP +#define ELF_NREG 49 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUNios2State *env) +{ + int i; + + (*regs)[0] = -1; + for (i = 1; i < 8; i++) /* r0-r7 */ + (*regs)[i] = tswapreg(env->regs[i + 7]); + + for (i = 8; i < 16; i++) /* r8-r15 */ + (*regs)[i] = tswapreg(env->regs[i - 8]); + + for (i = 16; i < 24; i++) /* r16-r23 */ + (*regs)[i] = tswapreg(env->regs[i + 7]); + (*regs)[24] = -1; /* R_ET */ + (*regs)[25] = -1; /* R_BT */ + (*regs)[26] = tswapreg(env->regs[R_GP]); + (*regs)[27] = tswapreg(env->regs[R_SP]); + (*regs)[28] = tswapreg(env->regs[R_FP]); + (*regs)[29] = tswapreg(env->regs[R_EA]); + (*regs)[30] = -1; /* R_SSTATUS */ + (*regs)[31] = tswapreg(env->regs[R_RA]); + + (*regs)[32] = tswapreg(env->regs[R_PC]); + + (*regs)[33] = -1; /* R_STATUS */ + (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]); + + for (i = 35; i < 49; i++) /* ... */ + (*regs)[i] = -1; +} + +#endif /* TARGET_NIOS2 */ + +#ifdef TARGET_OPENRISC + +#define ELF_START_MMAP 0x08000000 + +#define ELF_ARCH EM_OPENRISC +#define ELF_CLASS ELFCLASS32 +#define ELF_DATA ELFDATA2MSB + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->gpr[1] = infop->start_stack; +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 8192 + +/* See linux kernel arch/openrisc/include/asm/elf.h. */ +#define ELF_NREG 34 /* gprs and pc, sr */ +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUOpenRISCState *env) +{ + int i; + + for (i = 0; i < 32; i++) { + (*regs)[i] = tswapreg(cpu_get_gpr(env, i)); + } + (*regs)[32] = tswapreg(env->pc); + (*regs)[33] = tswapreg(cpu_get_sr(env)); +} +#define ELF_HWCAP 0 +#define ELF_PLATFORM NULL + +#endif /* TARGET_OPENRISC */ + +#ifdef TARGET_SH4 + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_SH + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + /* Check other registers XXXXX */ + regs->pc = infop->entry; + regs->regs[15] = infop->start_stack; +} + +/* See linux kernel: arch/sh/include/asm/elf.h. */ +#define ELF_NREG 23 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/sh/include/asm/ptrace.h. */ +enum { + TARGET_REG_PC = 16, + TARGET_REG_PR = 17, + TARGET_REG_SR = 18, + TARGET_REG_GBR = 19, + TARGET_REG_MACH = 20, + TARGET_REG_MACL = 21, + TARGET_REG_SYSCALL = 22 +}; + +static inline void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUSH4State *env) +{ + int i; + + for (i = 0; i < 16; i++) { + (*regs)[i] = tswapreg(env->gregs[i]); + } + + (*regs)[TARGET_REG_PC] = tswapreg(env->pc); + (*regs)[TARGET_REG_PR] = tswapreg(env->pr); + (*regs)[TARGET_REG_SR] = tswapreg(env->sr); + (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr); + (*regs)[TARGET_REG_MACH] = tswapreg(env->mach); + (*regs)[TARGET_REG_MACL] = tswapreg(env->macl); + (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum { + SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */ + SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */ + SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */ + SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */ + SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */ + SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */ + SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */ + SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */ + SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */ + SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */ +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + SuperHCPU *cpu = SUPERH_CPU(thread_cpu); + uint32_t hwcap = 0; + + hwcap |= SH_CPU_HAS_FPU; + + if (cpu->env.features & SH_FEATURE_SH4A) { + hwcap |= SH_CPU_HAS_LLSC; + } + + return hwcap; +} + +#endif + +#ifdef TARGET_CRIS + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_CRIS + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->erp = infop->entry; +} + +#define ELF_EXEC_PAGESIZE 8192 + +#endif + +#ifdef TARGET_M68K + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_68K + +/* ??? Does this need to do anything? + #define ELF_PLAT_INIT(_r) */ + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->usp = infop->start_stack; + regs->sr = 0; + regs->pc = infop->entry; +} + +/* See linux kernel: arch/m68k/include/asm/elf.h. */ +#define ELF_NREG 20 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env) +{ + (*regs)[0] = tswapreg(env->dregs[1]); + (*regs)[1] = tswapreg(env->dregs[2]); + (*regs)[2] = tswapreg(env->dregs[3]); + (*regs)[3] = tswapreg(env->dregs[4]); + (*regs)[4] = tswapreg(env->dregs[5]); + (*regs)[5] = tswapreg(env->dregs[6]); + (*regs)[6] = tswapreg(env->dregs[7]); + (*regs)[7] = tswapreg(env->aregs[0]); + (*regs)[8] = tswapreg(env->aregs[1]); + (*regs)[9] = tswapreg(env->aregs[2]); + (*regs)[10] = tswapreg(env->aregs[3]); + (*regs)[11] = tswapreg(env->aregs[4]); + (*regs)[12] = tswapreg(env->aregs[5]); + (*regs)[13] = tswapreg(env->aregs[6]); + (*regs)[14] = tswapreg(env->dregs[0]); + (*regs)[15] = tswapreg(env->aregs[7]); + (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */ + (*regs)[17] = tswapreg(env->sr); + (*regs)[18] = tswapreg(env->pc); + (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 8192 + +#endif + +#ifdef TARGET_ALPHA + +#define ELF_START_MMAP (0x30000000000ULL) + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_ALPHA + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->ps = 8; + regs->usp = infop->start_stack; +} + +#define ELF_EXEC_PAGESIZE 8192 + +#endif /* TARGET_ALPHA */ + +#ifdef TARGET_S390X + +#define ELF_START_MMAP (0x20000000000ULL) + +#define ELF_CLASS ELFCLASS64 +#define ELF_DATA ELFDATA2MSB +#define ELF_ARCH EM_S390 + +static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->psw.addr = infop->entry; + regs->psw.mask = PSW_MASK_64 | PSW_MASK_32; + regs->gprs[15] = infop->start_stack; +} + +#endif /* TARGET_S390X */ + +#ifdef TARGET_TILEGX + +/* 42 bits real used address, a half for user mode */ +#define ELF_START_MMAP (0x00000020000000000ULL) + +#define elf_check_arch(x) ((x) == EM_TILEGX) + +#define ELF_CLASS ELFCLASS64 +#define ELF_DATA ELFDATA2LSB +#define ELF_ARCH EM_TILEGX + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->sp = infop->start_stack; + +} + +#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */ + +#endif /* TARGET_TILEGX */ + +#ifdef TARGET_RISCV + +#define ELF_START_MMAP 0x80000000 +#define ELF_ARCH EM_RISCV + +#ifdef TARGET_RISCV32 +#define ELF_CLASS ELFCLASS32 +#else +#define ELF_CLASS ELFCLASS64 +#endif + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->sepc = infop->entry; + regs->sp = infop->start_stack; +} + +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_RISCV */ + +#ifdef TARGET_HPPA + +#define ELF_START_MMAP 0x80000000 +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_PARISC +#define ELF_PLATFORM "PARISC" +#define STACK_GROWS_DOWN 0 +#define STACK_ALIGNMENT 64 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->iaoq[0] = infop->entry; + regs->iaoq[1] = infop->entry + 4; + regs->gr[23] = 0; + regs->gr[24] = infop->arg_start; + regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong); + /* The top-of-stack contains a linkage buffer. */ + regs->gr[30] = infop->start_stack + 64; + regs->gr[31] = infop->entry; +} + +#endif /* TARGET_HPPA */ + +#ifndef ELF_PLATFORM +#define ELF_PLATFORM (NULL) +#endif + +#ifndef ELF_MACHINE +#define ELF_MACHINE ELF_ARCH +#endif + +#ifndef elf_check_arch +#define elf_check_arch(x) ((x) == ELF_ARCH) +#endif + +#ifndef ELF_HWCAP +#define ELF_HWCAP 0 +#endif + +#ifndef STACK_GROWS_DOWN +#define STACK_GROWS_DOWN 1 +#endif + +#ifndef STACK_ALIGNMENT +#define STACK_ALIGNMENT 16 +#endif + +#ifdef TARGET_ABI32 +#undef ELF_CLASS +#define ELF_CLASS ELFCLASS32 +#undef bswaptls +#define bswaptls(ptr) bswap32s(ptr) +#endif + +#include "elf.h" + +struct exec +{ + unsigned int a_info; /* Use macros N_MAGIC, etc for access */ + unsigned int a_text; /* length of text, in bytes */ + unsigned int a_data; /* length of data, in bytes */ + unsigned int a_bss; /* length of uninitialized data area, in bytes */ + unsigned int a_syms; /* length of symbol table data in file, in bytes */ + unsigned int a_entry; /* start address */ + unsigned int a_trsize; /* length of relocation info for text, in bytes */ + unsigned int a_drsize; /* length of relocation info for data, in bytes */ +}; + + +#define N_MAGIC(exec) ((exec).a_info & 0xffff) +#define OMAGIC 0407 +#define NMAGIC 0410 +#define ZMAGIC 0413 +#define QMAGIC 0314 + +/* Necessary parameters */ +#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE +#define TARGET_ELF_PAGESTART(_v) ((_v) & \ + ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1)) +#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) + +#define DLINFO_ITEMS 15 + +static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) +{ + memcpy(to, from, n); +} + +#ifdef BSWAP_NEEDED +static void bswap_ehdr(struct elfhdr *ehdr) +{ + bswap16s(&ehdr->e_type); /* Object file type */ + bswap16s(&ehdr->e_machine); /* Architecture */ + bswap32s(&ehdr->e_version); /* Object file version */ + bswaptls(&ehdr->e_entry); /* Entry point virtual address */ + bswaptls(&ehdr->e_phoff); /* Program header table file offset */ + bswaptls(&ehdr->e_shoff); /* Section header table file offset */ + bswap32s(&ehdr->e_flags); /* Processor-specific flags */ + bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ + bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ + bswap16s(&ehdr->e_phnum); /* Program header table entry count */ + bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ + bswap16s(&ehdr->e_shnum); /* Section header table entry count */ + bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ +} + +static void bswap_phdr(struct elf_phdr *phdr, int phnum) +{ + int i; + for (i = 0; i < phnum; ++i, ++phdr) { + bswap32s(&phdr->p_type); /* Segment type */ + bswap32s(&phdr->p_flags); /* Segment flags */ + bswaptls(&phdr->p_offset); /* Segment file offset */ + bswaptls(&phdr->p_vaddr); /* Segment virtual address */ + bswaptls(&phdr->p_paddr); /* Segment physical address */ + bswaptls(&phdr->p_filesz); /* Segment size in file */ + bswaptls(&phdr->p_memsz); /* Segment size in memory */ + bswaptls(&phdr->p_align); /* Segment alignment */ + } +} + +static void bswap_shdr(struct elf_shdr *shdr, int shnum) +{ + int i; + for (i = 0; i < shnum; ++i, ++shdr) { + bswap32s(&shdr->sh_name); + bswap32s(&shdr->sh_type); + bswaptls(&shdr->sh_flags); + bswaptls(&shdr->sh_addr); + bswaptls(&shdr->sh_offset); + bswaptls(&shdr->sh_size); + bswap32s(&shdr->sh_link); + bswap32s(&shdr->sh_info); + bswaptls(&shdr->sh_addralign); + bswaptls(&shdr->sh_entsize); + } +} + +static void bswap_sym(struct elf_sym *sym) +{ + bswap32s(&sym->st_name); + bswaptls(&sym->st_value); + bswaptls(&sym->st_size); + bswap16s(&sym->st_shndx); +} +#else +static inline void bswap_ehdr(struct elfhdr *ehdr) { } +static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { } +static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { } +static inline void bswap_sym(struct elf_sym *sym) { } +#endif + +#ifdef USE_ELF_CORE_DUMP +static int elf_core_dump(int, const CPUArchState *); +#endif /* USE_ELF_CORE_DUMP */ +static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias); + +/* Verify the portions of EHDR within E_IDENT for the target. + This can be performed before bswapping the entire header. */ +static bool elf_check_ident(struct elfhdr *ehdr) +{ + return (ehdr->e_ident[EI_MAG0] == ELFMAG0 + && ehdr->e_ident[EI_MAG1] == ELFMAG1 + && ehdr->e_ident[EI_MAG2] == ELFMAG2 + && ehdr->e_ident[EI_MAG3] == ELFMAG3 + && ehdr->e_ident[EI_CLASS] == ELF_CLASS + && ehdr->e_ident[EI_DATA] == ELF_DATA + && ehdr->e_ident[EI_VERSION] == EV_CURRENT); +} + +/* Verify the portions of EHDR outside of E_IDENT for the target. + This has to wait until after bswapping the header. */ +static bool elf_check_ehdr(struct elfhdr *ehdr) +{ + return (elf_check_arch(ehdr->e_machine) + && ehdr->e_ehsize == sizeof(struct elfhdr) + && ehdr->e_phentsize == sizeof(struct elf_phdr) + && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN)); +} + +/* + * 'copy_elf_strings()' copies argument/envelope strings from user + * memory to free pages in kernel mem. These are in a format ready + * to be put directly into the top of new user memory. + * + */ +static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch, + abi_ulong p, abi_ulong stack_limit) +{ + char *tmp; + int len, i; + abi_ulong top = p; + + if (!p) { + return 0; /* bullet-proofing */ + } + + if (STACK_GROWS_DOWN) { + int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1; + for (i = argc - 1; i >= 0; --i) { + tmp = argv[i]; + if (!tmp) { + fprintf(stderr, "VFS: argc is wrong"); + exit(-1); + } + len = strlen(tmp) + 1; + tmp += len; + + if (len > (p - stack_limit)) { + return 0; + } + while (len) { + int bytes_to_copy = (len > offset) ? offset : len; + tmp -= bytes_to_copy; + p -= bytes_to_copy; + offset -= bytes_to_copy; + len -= bytes_to_copy; + + memcpy_fromfs(scratch + offset, tmp, bytes_to_copy); + + if (offset == 0) { + memcpy_to_target(p, scratch, top - p); + top = p; + offset = TARGET_PAGE_SIZE; + } + } + } + if (p != top) { + memcpy_to_target(p, scratch + offset, top - p); + } + } else { + int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE); + for (i = 0; i < argc; ++i) { + tmp = argv[i]; + if (!tmp) { + fprintf(stderr, "VFS: argc is wrong"); + exit(-1); + } + len = strlen(tmp) + 1; + if (len > (stack_limit - p)) { + return 0; + } + while (len) { + int bytes_to_copy = (len > remaining) ? remaining : len; + + memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy); + + tmp += bytes_to_copy; + remaining -= bytes_to_copy; + p += bytes_to_copy; + len -= bytes_to_copy; + + if (remaining == 0) { + memcpy_to_target(top, scratch, p - top); + top = p; + remaining = TARGET_PAGE_SIZE; + } + } + } + if (p != top) { + memcpy_to_target(top, scratch, p - top); + } + } + + return p; +} + +/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of + * argument/environment space. Newer kernels (>2.6.33) allow more, + * dependent on stack size, but guarantee at least 32 pages for + * backwards compatibility. + */ +#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE) + +static abi_ulong setup_arg_pages(struct linux_binprm *bprm, + struct image_info *info) +{ + abi_ulong size, error, guard; + + size = guest_stack_size; + if (size < STACK_LOWER_LIMIT) { + size = STACK_LOWER_LIMIT; + } + guard = TARGET_PAGE_SIZE; + if (guard < qemu_real_host_page_size) { + guard = qemu_real_host_page_size; + } + +#ifdef TARGET_ABI_IRIX + error = target_mmap(0x7fff8000 - size - guard, size + guard, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); +#else + error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); +#endif + if (error == -1) { + perror("mmap stack"); + exit(-1); + } + + /* We reserve one extra page at the top of the stack as guard. */ + if (STACK_GROWS_DOWN) { + target_mprotect(error, guard, PROT_NONE); + info->stack_limit = error + guard; + return info->stack_limit + size - sizeof(void *); + } else { + target_mprotect(error + size, guard, PROT_NONE); + info->stack_limit = error + size; + return error; + } +} + +/* Map and zero the bss. We need to explicitly zero any fractional pages + after the data section (i.e. bss). */ +static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) +{ + uintptr_t host_start, host_map_start, host_end; + + last_bss = TARGET_PAGE_ALIGN(last_bss); + + /* ??? There is confusion between qemu_real_host_page_size and + qemu_host_page_size here and elsewhere in target_mmap, which + may lead to the end of the data section mapping from the file + not being mapped. At least there was an explicit test and + comment for that here, suggesting that "the file size must + be known". The comment probably pre-dates the introduction + of the fstat system call in target_mmap which does in fact + find out the size. What isn't clear is if the workaround + here is still actually needed. For now, continue with it, + but merge it with the "normal" mmap that would allocate the bss. */ + + host_start = (uintptr_t) g2h(elf_bss); + host_end = (uintptr_t) g2h(last_bss); + host_map_start = REAL_HOST_PAGE_ALIGN(host_start); + + if (host_map_start < host_end) { + void *p = mmap((void *)host_map_start, host_end - host_map_start, + prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (p == MAP_FAILED) { + perror("cannot mmap brk"); + exit(-1); + } + } + + /* Ensure that the bss page(s) are valid */ + if ((page_get_flags(last_bss-1) & prot) != prot) { + page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID); + } + + if (host_start < host_map_start) { + memset((void *)host_start, 0, host_map_start - host_start); + } +} + +#ifdef CONFIG_USE_FDPIC +static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp) +{ + uint16_t n; + struct elf32_fdpic_loadseg *loadsegs = info->loadsegs; + + /* elf32_fdpic_loadseg */ + n = info->nsegs; + while (n--) { + sp -= 12; + put_user_u32(loadsegs[n].addr, sp+0); + put_user_u32(loadsegs[n].p_vaddr, sp+4); + put_user_u32(loadsegs[n].p_memsz, sp+8); + } + + /* elf32_fdpic_loadmap */ + sp -= 4; + put_user_u16(0, sp+0); /* version */ + put_user_u16(info->nsegs, sp+2); /* nsegs */ + + info->personality = PER_LINUX_FDPIC; + info->loadmap_addr = sp; + + return sp; +} +#endif + +static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, + struct elfhdr *exec, + struct image_info *info, + struct image_info *interp_info) +{ + abi_ulong sp; + abi_ulong u_argc, u_argv, u_envp, u_auxv; + int size; + int i; + abi_ulong u_rand_bytes; + uint8_t k_rand_bytes[16]; + abi_ulong u_platform; + const char *k_platform; + const int n = sizeof(elf_addr_t); + + sp = p; + +#ifdef CONFIG_USE_FDPIC + /* Needs to be before we load the env/argc/... */ + if (elf_is_fdpic(exec)) { + /* Need 4 byte alignment for these structs */ + sp &= ~3; + sp = loader_build_fdpic_loadmap(info, sp); + info->other_info = interp_info; + if (interp_info) { + interp_info->other_info = info; + sp = loader_build_fdpic_loadmap(interp_info, sp); + } + } +#endif + + u_platform = 0; + k_platform = ELF_PLATFORM; + if (k_platform) { + size_t len = strlen(k_platform) + 1; + if (STACK_GROWS_DOWN) { + sp -= (len + n - 1) & ~(n - 1); + u_platform = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_platform, len); + } else { + memcpy_to_target(sp, k_platform, len); + u_platform = sp; + sp += len + 1; + } + } + + /* Provide 16 byte alignment for the PRNG, and basic alignment for + * the argv and envp pointers. + */ + if (STACK_GROWS_DOWN) { + sp = QEMU_ALIGN_DOWN(sp, 16); + } else { + sp = QEMU_ALIGN_UP(sp, 16); + } + + /* + * Generate 16 random bytes for userspace PRNG seeding (not + * cryptically secure but it's not the aim of QEMU). + */ + for (i = 0; i < 16; i++) { + k_rand_bytes[i] = rand(); + } + if (STACK_GROWS_DOWN) { + sp -= 16; + u_rand_bytes = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_rand_bytes, 16); + } else { + memcpy_to_target(sp, k_rand_bytes, 16); + u_rand_bytes = sp; + sp += 16; + } + + size = (DLINFO_ITEMS + 1) * 2; + if (k_platform) + size += 2; +#ifdef DLINFO_ARCH_ITEMS + size += DLINFO_ARCH_ITEMS * 2; +#endif +#ifdef ELF_HWCAP2 + size += 2; +#endif + info->auxv_len = size * n; + + size += envc + argc + 2; + size += 1; /* argc itself */ + size *= n; + + /* Allocate space and finalize stack alignment for entry now. */ + if (STACK_GROWS_DOWN) { + u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT); + sp = u_argc; + } else { + u_argc = sp; + sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT); + } + + u_argv = u_argc + n; + u_envp = u_argv + (argc + 1) * n; + u_auxv = u_envp + (envc + 1) * n; + info->saved_auxv = u_auxv; + info->arg_start = u_argv; + info->arg_end = u_argv + argc * n; + +#ifdef TARGET_ABI_IRIX +#define NEW_AUX_ENT(id, val) do { \ + put_user_u32(id, u_auxv); u_auxv += n; \ + put_user_ual(val, u_auxv); u_auxv += n; \ + } while(0) +#else + /* This is correct because Linux defines + * elf_addr_t as Elf32_Off / Elf64_Off + */ +#define NEW_AUX_ENT(id, val) do { \ + put_user_ual(id, u_auxv); u_auxv += n; \ + put_user_ual(val, u_auxv); u_auxv += n; \ + } while(0) +#endif + +#ifdef ARCH_DLINFO + /* + * ARCH_DLINFO must come first so platform specific code can enforce + * special alignment requirements on the AUXV if necessary (eg. PPC). + */ + ARCH_DLINFO; +#endif + /* There must be exactly DLINFO_ITEMS entries here, or the assert + * on info->auxv_len will trigger. + */ +#ifdef TARGET_ABI_IRIX + NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_bias + info->phdr_offset)); +#else + NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff)); +#endif + NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); + NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); + NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, getpagesize()))); + NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0)); + NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); + NEW_AUX_ENT(AT_ENTRY, info->entry); + NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); + NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); + NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); + NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); + NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); + NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); + NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes); + NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE)); + +#ifdef ELF_HWCAP2 + NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2); +#endif + + if (u_platform) { + NEW_AUX_ENT(AT_PLATFORM, u_platform); + } + NEW_AUX_ENT (AT_NULL, 0); +#undef NEW_AUX_ENT + + /* Check that our initial calculation of the auxv length matches how much + * we actually put into it. + */ + assert(info->auxv_len == u_auxv - info->saved_auxv); + + put_user_ual(argc, u_argc); + + p = info->arg_strings; + for (i = 0; i < argc; ++i) { + put_user_ual(p, u_argv); + u_argv += n; + p += target_strlen(p) + 1; + } + put_user_ual(0, u_argv); + + p = info->env_strings; + for (i = 0; i < envc; ++i) { + put_user_ual(p, u_envp); + u_envp += n; + p += target_strlen(p) + 1; + } + put_user_ual(0, u_envp); + + return sp; +} + +#ifndef TARGET_HAS_VALIDATE_GUEST_SPACE +/* If the guest doesn't have a validation function just agree */ +static int validate_guest_space(unsigned long guest_base, + unsigned long guest_size) +{ + return 1; +} +#endif + +unsigned long init_guest_space(unsigned long host_start, + unsigned long host_size, + unsigned long guest_start, + bool fixed) +{ + unsigned long current_start, real_start; + int flags; + + assert(host_start || host_size); + + /* If just a starting address is given, then just verify that + * address. */ + if (host_start && !host_size) { + if (validate_guest_space(host_start, host_size) == 1) { + return host_start; + } else { + return (unsigned long)-1; + } + } + + /* Setup the initial flags and start address. */ + current_start = host_start & qemu_host_page_mask; + flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE; + if (fixed) { + flags |= MAP_FIXED; + } + + /* Otherwise, a non-zero size region of memory needs to be mapped + * and validated. */ + while (1) { + unsigned long real_size = host_size; + + /* Do not use mmap_find_vma here because that is limited to the + * guest address space. We are going to make the + * guest address space fit whatever we're given. + */ + real_start = (unsigned long) + mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0); + if (real_start == (unsigned long)-1) { + return (unsigned long)-1; + } + + /* Ensure the address is properly aligned. */ + if (real_start & ~qemu_host_page_mask) { + munmap((void *)real_start, host_size); + real_size = host_size + qemu_host_page_size; + real_start = (unsigned long) + mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0); + if (real_start == (unsigned long)-1) { + return (unsigned long)-1; + } + real_start = HOST_PAGE_ALIGN(real_start); + } + + /* Check to see if the address is valid. */ + if (!host_start || real_start == current_start) { + int valid = validate_guest_space(real_start - guest_start, + real_size); + if (valid == 1) { + break; + } else if (valid == -1) { + return (unsigned long)-1; + } + /* valid == 0, so try again. */ + } + + /* That address didn't work. Unmap and try a different one. + * The address the host picked because is typically right at + * the top of the host address space and leaves the guest with + * no usable address space. Resort to a linear search. We + * already compensated for mmap_min_addr, so this should not + * happen often. Probably means we got unlucky and host + * address space randomization put a shared library somewhere + * inconvenient. + */ + munmap((void *)real_start, host_size); + current_start += qemu_host_page_size; + if (host_start == current_start) { + /* Theoretically possible if host doesn't have any suitably + * aligned areas. Normally the first mmap will fail. + */ + return (unsigned long)-1; + } + } + + qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size); + + return real_start; +} + +static void probe_guest_base(const char *image_name, + abi_ulong loaddr, abi_ulong hiaddr) +{ + /* Probe for a suitable guest base address, if the user has not set + * it explicitly, and set guest_base appropriately. + * In case of error we will print a suitable message and exit. + */ + const char *errmsg; + if (!have_guest_base && !reserved_va) { + unsigned long host_start, real_start, host_size; + + /* Round addresses to page boundaries. */ + loaddr &= qemu_host_page_mask; + hiaddr = HOST_PAGE_ALIGN(hiaddr); + + if (loaddr < mmap_min_addr) { + host_start = HOST_PAGE_ALIGN(mmap_min_addr); + } else { + host_start = loaddr; + if (host_start != loaddr) { + errmsg = "Address overflow loading ELF binary"; + goto exit_errmsg; + } + } + host_size = hiaddr - loaddr; + + /* Setup the initial guest memory space with ranges gleaned from + * the ELF image that is being loaded. + */ + real_start = init_guest_space(host_start, host_size, loaddr, false); + if (real_start == (unsigned long)-1) { + errmsg = "Unable to find space for application"; + goto exit_errmsg; + } + guest_base = real_start - loaddr; + + qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x" + TARGET_ABI_FMT_lx " to 0x%lx\n", + loaddr, real_start); + } + return; + +exit_errmsg: + fprintf(stderr, "%s: %s\n", image_name, errmsg); + exit(-1); +} + + +#ifdef TARGET_ABI_IRIX +/* SGI_ELFMAP: Map ELF sections into the address space. + IMAGE_FD is the open file descriptor for the image. +*/ +abi_ulong sgi_map_elf_image(int image_fd, struct elf_phdr *phdr, int phnum) +{ + abi_ulong load_addr, load_bias, loaddr, hiaddr, error; + int i; + const char *errmsg; + + /* Find the maximum size of the image and allocate an appropriate + amount of memory to handle that. */ + loaddr = -1, hiaddr = 0; + for (i = 0; i < phnum; ++i) { + if (phdr[i].p_type == PT_LOAD) { + abi_ulong a = phdr[i].p_vaddr; + if (a < loaddr) { + loaddr = a; + } + a += phdr[i].p_memsz; + if (a > hiaddr) { + hiaddr = a; + } + } + } + + mmap_lock(); + + /* The image indicates that it can be loaded anywhere. Find a + location that can hold the memory space required. If the + image is pre-linked, LOADDR will be non-zero. Since we do + not supply MAP_FIXED here we'll use that address if and + only if it remains available. */ + load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE, + MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, + -1, 0); + if (load_addr == -1) { + goto exit_perror; + } + /* unmap to avoid failure if objects would be loaded into a hole */ + target_munmap(load_addr, hiaddr - loaddr); + load_bias = load_addr - loaddr; + + for (i = 0; i < phnum; i++) { + struct elf_phdr *eppnt = phdr + i; + if (eppnt->p_type == PT_LOAD) { + abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em; + int elf_prot = 0; + + if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; + if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; + if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; + + vaddr = load_bias + eppnt->p_vaddr; + vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr); + vaddr_ps = TARGET_ELF_PAGESTART(vaddr); + + error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po, + elf_prot, MAP_PRIVATE | MAP_FIXED, + image_fd, eppnt->p_offset - vaddr_po); + if (error == -1) { + goto exit_perror; + } + + vaddr_ef = vaddr + eppnt->p_filesz; + vaddr_em = vaddr + eppnt->p_memsz; + + /* If the load segment requests extra zeros (e.g. bss), map it. */ + if (vaddr_ef < vaddr_em) { + zero_bss(vaddr_ef, vaddr_em, elf_prot); + } + } + } + + mmap_unlock(); + + return load_bias + phdr[0].p_vaddr; + + exit_perror: + mmap_unlock(); + + errmsg = strerror(errno); + fprintf(stderr, "error in syssgi elfmap: %s\n", errmsg); + return -ENOEXEC; +} +#endif + +/* Load an ELF image into the address space. + + IMAGE_NAME is the filename of the image, to use in error messages. + IMAGE_FD is the open file descriptor for the image. + + BPRM_BUF is a copy of the beginning of the file; this of course + contains the elf file header at offset 0. It is assumed that this + buffer is sufficiently aligned to present no problems to the host + in accessing data at aligned offsets within the buffer. + + On return: INFO values will be filled in, as necessary or available. */ + +static void load_elf_image(const char *image_name, int image_fd, + struct image_info *info, char **pinterp_name, + char bprm_buf[BPRM_BUF_SIZE]) +{ + struct elfhdr *ehdr = (struct elfhdr *)bprm_buf; + struct elf_phdr *phdr; + abi_ulong load_addr, load_bias, loaddr, hiaddr, error; + int i, retval; + const char *errmsg; + + /* First of all, some simple consistency checks */ + errmsg = "Invalid ELF image for this architecture"; + if (!elf_check_ident(ehdr)) { + goto exit_errmsg; + } + bswap_ehdr(ehdr); + if (!elf_check_ehdr(ehdr)) { + goto exit_errmsg; + } + + i = ehdr->e_phnum * sizeof(struct elf_phdr); + if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) { + phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff); + } else { + phdr = (struct elf_phdr *) alloca(i); + retval = pread(image_fd, phdr, i, ehdr->e_phoff); + if (retval != i) { + goto exit_read; + } + } + bswap_phdr(phdr, ehdr->e_phnum); + +#ifdef CONFIG_USE_FDPIC + info->nsegs = 0; + info->pt_dynamic_addr = 0; +#endif + + mmap_lock(); + + /* Find the maximum size of the image and allocate an appropriate + amount of memory to handle that. */ + loaddr = -1, hiaddr = 0; + for (i = 0; i < ehdr->e_phnum; ++i) { + if (phdr[i].p_type == PT_LOAD) { + abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset; + if (a < loaddr) { + loaddr = a; + } + a = phdr[i].p_vaddr + phdr[i].p_memsz; + if (a > hiaddr) { + hiaddr = a; + } +#ifdef CONFIG_USE_FDPIC + ++info->nsegs; +#endif + } + } + + load_addr = loaddr; + if (ehdr->e_type == ET_DYN) { + /* The image indicates that it can be loaded anywhere. Find a + location that can hold the memory space required. If the + image is pre-linked, LOADDR will be non-zero. Since we do + not supply MAP_FIXED here we'll use that address if and + only if it remains available. */ + load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE, + MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, + -1, 0); + if (load_addr == -1) { + goto exit_perror; + } + /* unmap to avoid failure if objects would be loaded into a hole */ + target_munmap(load_addr, hiaddr - loaddr); + } else if (pinterp_name != NULL) { + /* This is the main executable. Make sure that the low + address does not conflict with MMAP_MIN_ADDR or the + QEMU application itself. */ + probe_guest_base(image_name, loaddr, hiaddr); + } + load_bias = load_addr - loaddr; + +#ifdef CONFIG_USE_FDPIC + { + struct elf32_fdpic_loadseg *loadsegs = info->loadsegs = + g_malloc(sizeof(*loadsegs) * info->nsegs); + + for (i = 0; i < ehdr->e_phnum; ++i) { + switch (phdr[i].p_type) { + case PT_DYNAMIC: + info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias; + break; + case PT_LOAD: + loadsegs->addr = phdr[i].p_vaddr + load_bias; + loadsegs->p_vaddr = phdr[i].p_vaddr; + loadsegs->p_memsz = phdr[i].p_memsz; + ++loadsegs; + break; + } + } + } +#endif + + info->load_bias = load_bias; + info->load_addr = load_addr; + info->entry = ehdr->e_entry + load_bias; + info->start_code = -1; + info->end_code = 0; + info->start_data = -1; + info->end_data = 0; + info->brk = 0; + info->elf_flags = ehdr->e_flags; + + for (i = 0; i < ehdr->e_phnum; i++) { + struct elf_phdr *eppnt = phdr + i; + if (eppnt->p_type == PT_LOAD) { + abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em; + int elf_prot = 0; + + if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; + if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; + if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; + + vaddr = load_bias + eppnt->p_vaddr; + vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr); + vaddr_ps = TARGET_ELF_PAGESTART(vaddr); + + error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po, + elf_prot, MAP_PRIVATE | MAP_FIXED, + image_fd, eppnt->p_offset - vaddr_po); + if (error == -1) { + goto exit_perror; + } + + vaddr_ef = vaddr + eppnt->p_filesz; + vaddr_em = vaddr + eppnt->p_memsz; + + /* If the load segment requests extra zeros (e.g. bss), map it. */ + if (vaddr_ef < vaddr_em) { + zero_bss(vaddr_ef, vaddr_em, elf_prot); + } + + /* Find the full program boundaries. */ + if (elf_prot & PROT_EXEC) { + if (vaddr < info->start_code) { + info->start_code = vaddr; + } + if (vaddr_ef > info->end_code) { + info->end_code = vaddr_ef; + } + } + if (elf_prot & PROT_WRITE) { + if (vaddr < info->start_data) { + info->start_data = vaddr; + } + if (vaddr_ef > info->end_data) { + info->end_data = vaddr_ef; + } + if (vaddr_em > info->brk) { + info->brk = vaddr_em; + } + } + } else if (eppnt->p_type == PT_INTERP && pinterp_name) { + char *interp_name; + + if (*pinterp_name) { + errmsg = "Multiple PT_INTERP entries"; + goto exit_errmsg; + } + interp_name = malloc(eppnt->p_filesz); + if (!interp_name) { + goto exit_perror; + } + + if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { + memcpy(interp_name, bprm_buf + eppnt->p_offset, + eppnt->p_filesz); + } else { + retval = pread(image_fd, interp_name, eppnt->p_filesz, + eppnt->p_offset); + if (retval != eppnt->p_filesz) { + goto exit_perror; + } + } + if (interp_name[eppnt->p_filesz - 1] != 0) { + errmsg = "Invalid PT_INTERP entry"; + goto exit_errmsg; + } + *pinterp_name = interp_name; + } +#ifdef TARGET_ABI_IRIX + else if (eppnt->p_type == PT_PHDR) { + info->phdr_offset = eppnt->p_vaddr; + } +#endif + } + + if (info->end_data == 0) { + info->start_data = info->end_code; + info->end_data = info->end_code; + info->brk = info->end_code; + } + + if (qemu_log_enabled()) { + load_symbols(ehdr, image_fd, load_bias); + } + + mmap_unlock(); + + close(image_fd); +#ifdef TARGET_ABI_IRIX + /* PRDA hack */ + error = target_mmap(0x200000, TARGET_PAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS, + -1, 0); + if (error == -1) { + goto exit_perror; + } + put_user(getpid(), 0x200e00, target_pid_t); + put_user(getpid(), 0x200e40, target_pid_t); +#endif + return; + + exit_read: + if (retval >= 0) { + errmsg = "Incomplete read of file header"; + goto exit_errmsg; + } + exit_perror: + errmsg = strerror(errno); + exit_errmsg: + fprintf(stderr, "%s: %s\n", image_name, errmsg); + exit(-1); +} + +static void load_elf_interp(const char *filename, struct image_info *info, + char bprm_buf[BPRM_BUF_SIZE]) +{ + int fd, retval; + + fd = open(path(filename), O_RDONLY); + if (fd < 0) { + goto exit_perror; + } + + retval = read(fd, bprm_buf, BPRM_BUF_SIZE); + if (retval < 0) { + goto exit_perror; + } + if (retval < BPRM_BUF_SIZE) { + memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval); + } + + load_elf_image(filename, fd, info, NULL, bprm_buf); + return; + + exit_perror: + fprintf(stderr, "%s: %s\n", filename, strerror(errno)); + exit(-1); +} + +static int symfind(const void *s0, const void *s1) +{ + target_ulong addr = *(target_ulong *)s0; + struct elf_sym *sym = (struct elf_sym *)s1; + int result = 0; + if (addr < sym->st_value) { + result = -1; + } else if (addr >= sym->st_value + sym->st_size) { + result = 1; + } + return result; +} + +static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) +{ +#if ELF_CLASS == ELFCLASS32 + struct elf_sym *syms = s->disas_symtab.elf32; +#else + struct elf_sym *syms = s->disas_symtab.elf64; +#endif + + // binary search + struct elf_sym *sym; + + sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind); + if (sym != NULL) { + return s->disas_strtab + sym->st_name; + } + + return ""; +} + +/* FIXME: This should use elf_ops.h */ +static int symcmp(const void *s0, const void *s1) +{ + struct elf_sym *sym0 = (struct elf_sym *)s0; + struct elf_sym *sym1 = (struct elf_sym *)s1; + return (sym0->st_value < sym1->st_value) + ? -1 + : ((sym0->st_value > sym1->st_value) ? 1 : 0); +} + +/* Best attempt to load symbols from this ELF object. */ +static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias) +{ + int i, shnum, nsyms, sym_idx = 0, str_idx = 0; + uint64_t segsz; + struct elf_shdr *shdr; + char *strings = NULL; + struct syminfo *s = NULL; + struct elf_sym *new_syms, *syms = NULL; + + shnum = hdr->e_shnum; + i = shnum * sizeof(struct elf_shdr); + shdr = (struct elf_shdr *)alloca(i); + if (pread(fd, shdr, i, hdr->e_shoff) != i) { + return; + } + + bswap_shdr(shdr, shnum); + for (i = 0; i < shnum; ++i) { + if (shdr[i].sh_type == SHT_SYMTAB) { + sym_idx = i; + str_idx = shdr[i].sh_link; + goto found; + } + } + + /* There will be no symbol table if the file was stripped. */ + return; + + found: + /* Now know where the strtab and symtab are. Snarf them. */ + s = g_try_new(struct syminfo, 1); + if (!s) { + goto give_up; + } + + segsz = shdr[str_idx].sh_size; + s->disas_strtab = strings = g_try_malloc(segsz); + if (!strings || + pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) { + goto give_up; + } + + segsz = shdr[sym_idx].sh_size; + syms = g_try_malloc(segsz); + if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) { + goto give_up; + } + + if (segsz / sizeof(struct elf_sym) > INT_MAX) { + /* Implausibly large symbol table: give up rather than ploughing + * on with the number of symbols calculation overflowing + */ + goto give_up; + } + nsyms = segsz / sizeof(struct elf_sym); + for (i = 0; i < nsyms; ) { + bswap_sym(syms + i); + /* Throw away entries which we do not need. */ + if (syms[i].st_shndx == SHN_UNDEF + || syms[i].st_shndx >= SHN_LORESERVE + || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { + if (i < --nsyms) { + syms[i] = syms[nsyms]; + } + } else { +#if defined(TARGET_ARM) || defined (TARGET_MIPS) + /* The bottom address bit marks a Thumb or MIPS16 symbol. */ + syms[i].st_value &= ~(target_ulong)1; +#endif + syms[i].st_value += load_bias; + i++; + } + } + + /* No "useful" symbol. */ + if (nsyms == 0) { + goto give_up; + } + + /* Attempt to free the storage associated with the local symbols + that we threw away. Whether or not this has any effect on the + memory allocation depends on the malloc implementation and how + many symbols we managed to discard. */ + new_syms = g_try_renew(struct elf_sym, syms, nsyms); + if (new_syms == NULL) { + goto give_up; + } + syms = new_syms; + + qsort(syms, nsyms, sizeof(*syms), symcmp); + + s->disas_num_syms = nsyms; +#if ELF_CLASS == ELFCLASS32 + s->disas_symtab.elf32 = syms; +#else + s->disas_symtab.elf64 = syms; +#endif + s->lookup_symbol = lookup_symbolxx; + s->next = syminfos; + syminfos = s; + + return; + +give_up: + g_free(s); + g_free(strings); + g_free(syms); +} + +uint32_t get_elf_eflags(int fd) +{ + struct elfhdr ehdr; + off_t offset; + int ret; + + /* Read ELF header */ + offset = lseek(fd, 0, SEEK_SET); + if (offset == (off_t) -1) { + return 0; + } + ret = read(fd, &ehdr, sizeof(ehdr)); + if (ret < sizeof(ehdr)) { + return 0; + } + offset = lseek(fd, offset, SEEK_SET); + if (offset == (off_t) -1) { + return 0; + } + + /* Check ELF signature */ + if (!elf_check_ident(&ehdr)) { + return 0; + } + + /* check header */ + bswap_ehdr(&ehdr); + if (!elf_check_ehdr(&ehdr)) { + return 0; + } + + /* return architecture id */ + return ehdr.e_flags; +} + +int load_elf_binary(struct linux_binprm *bprm, struct image_info *info) +{ + struct image_info interp_info; + struct elfhdr elf_ex; + char *elf_interpreter = NULL; + char *scratch; + abi_ulong top; + + info->start_mmap = (abi_ulong)ELF_START_MMAP; + + load_elf_image(bprm->filename, bprm->fd, info, + &elf_interpreter, bprm->buf); + + /* ??? We need a copy of the elf header for passing to create_elf_tables. + If we do nothing, we'll have overwritten this when we re-use bprm->buf + when we load the interpreter. */ + elf_ex = *(struct elfhdr *)bprm->buf; + + /* Do this so that we can load the interpreter, if need be. We will + change some of these later */ + bprm->p = top = setup_arg_pages(bprm, info); + + scratch = g_new0(char, TARGET_PAGE_SIZE); + if (STACK_GROWS_DOWN) { + bprm->p = copy_elf_strings(1, &bprm->filename, scratch, + bprm->p, info->stack_limit); + info->file_string = bprm->p; + bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch, + bprm->p, info->stack_limit); + info->env_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch, + bprm->p, info->stack_limit); + info->arg_strings = bprm->p; + } else { + info->arg_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch, + bprm->p, info->stack_limit); + info->env_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch, + bprm->p, info->stack_limit); + info->file_string = bprm->p; + bprm->p = copy_elf_strings(1, &bprm->filename, scratch, + bprm->p, info->stack_limit); + } + + g_free(scratch); + + if (!bprm->p) { + fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG)); + exit(-1); + } +#ifdef TARGET_ABI_IRIX + /* page alignment */ + if (bprm->p % TARGET_PAGE_SIZE) { + int o = bprm->p % TARGET_PAGE_SIZE; + int l = top - bprm->p; + int p = bprm->p - o; + char *ptr = lock_user(VERIFY_WRITE, p, l+o, 0); + if (!ptr) { + fprintf(stderr, "%s: %s\n", bprm->filename, strerror(EFAULT)); + exit(-1); + } + memmove(ptr, ptr+o, l); + unlock_user(ptr, p, 1); + /* adjust pointers by alignment offset */ + bprm->p -= o; + info->file_string -= o; + info->arg_strings -= o; + info->env_strings -= o; + } +#endif + + if (elf_interpreter) { + load_elf_interp(elf_interpreter, &interp_info, bprm->buf); + + /* If the program interpreter is one of these two, then assume + an iBCS2 image. Otherwise assume a native linux image. */ + + if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0 + || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) { + info->personality = PER_SVR4; + + /* Why this, you ask??? Well SVr4 maps page 0 as read-only, + and some applications "depend" upon this behavior. Since + we do not have the power to recompile these, we emulate + the SVr4 behavior. Sigh. */ + target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, + MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + } + } + + bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex, + info, (elf_interpreter ? &interp_info : NULL)); + info->start_stack = bprm->p; + + /* If we have an interpreter, set that as the program's entry point. + Copy the load_bias as well, to help PPC64 interpret the entry + point as a function descriptor. Do this after creating elf tables + so that we copy the original program entry point into the AUXV. */ + if (elf_interpreter) { + info->load_bias = interp_info.load_bias; + info->entry = interp_info.entry; + free(elf_interpreter); + } + +#ifdef USE_ELF_CORE_DUMP + bprm->core_dump = &elf_core_dump; +#endif + + return 0; +} + +#ifdef USE_ELF_CORE_DUMP +/* + * Definitions to generate Intel SVR4-like core files. + * These mostly have the same names as the SVR4 types with "target_elf_" + * tacked on the front to prevent clashes with linux definitions, + * and the typedef forms have been avoided. This is mostly like + * the SVR4 structure, but more Linuxy, with things that Linux does + * not support and which gdb doesn't really use excluded. + * + * Fields we don't dump (their contents is zero) in linux-user qemu + * are marked with XXX. + * + * Core dump code is copied from linux kernel (fs/binfmt_elf.c). + * + * Porting ELF coredump for target is (quite) simple process. First you + * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for + * the target resides): + * + * #define USE_ELF_CORE_DUMP + * + * Next you define type of register set used for dumping. ELF specification + * says that it needs to be array of elf_greg_t that has size of ELF_NREG. + * + * typedef target_elf_greg_t; + * #define ELF_NREG + * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG]; + * + * Last step is to implement target specific function that copies registers + * from given cpu into just specified register set. Prototype is: + * + * static void elf_core_copy_regs(taret_elf_gregset_t *regs, + * const CPUArchState *env); + * + * Parameters: + * regs - copy register values into here (allocated and zeroed by caller) + * env - copy registers from here + * + * Example for ARM target is provided in this file. + */ + +/* An ELF note in memory */ +struct memelfnote { + const char *name; + size_t namesz; + size_t namesz_rounded; + int type; + size_t datasz; + size_t datasz_rounded; + void *data; + size_t notesz; +}; + +struct target_elf_siginfo { + abi_int si_signo; /* signal number */ + abi_int si_code; /* extra code */ + abi_int si_errno; /* errno */ +}; + +struct target_elf_prstatus { + struct target_elf_siginfo pr_info; /* Info associated with signal */ + abi_short pr_cursig; /* Current signal */ + abi_ulong pr_sigpend; /* XXX */ + abi_ulong pr_sighold; /* XXX */ + target_pid_t pr_pid; + target_pid_t pr_ppid; + target_pid_t pr_pgrp; + target_pid_t pr_sid; + struct target_timeval pr_utime; /* XXX User time */ + struct target_timeval pr_stime; /* XXX System time */ + struct target_timeval pr_cutime; /* XXX Cumulative user time */ + struct target_timeval pr_cstime; /* XXX Cumulative system time */ + target_elf_gregset_t pr_reg; /* GP registers */ + abi_int pr_fpvalid; /* XXX */ +}; + +#define ELF_PRARGSZ (80) /* Number of chars for args */ + +struct target_elf_prpsinfo { + char pr_state; /* numeric process state */ + char pr_sname; /* char for pr_state */ + char pr_zomb; /* zombie */ + char pr_nice; /* nice val */ + abi_ulong pr_flag; /* flags */ + target_uid_t pr_uid; + target_gid_t pr_gid; + target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; + /* Lots missing */ + char pr_fname[16]; /* filename of executable */ + char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ +}; + +/* Here is the structure in which status of each thread is captured. */ +struct elf_thread_status { + QTAILQ_ENTRY(elf_thread_status) ets_link; + struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ +#if 0 + elf_fpregset_t fpu; /* NT_PRFPREG */ + struct task_struct *thread; + elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ +#endif + struct memelfnote notes[1]; + int num_notes; +}; + +struct elf_note_info { + struct memelfnote *notes; + struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ + struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ + + QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; +#if 0 + /* + * Current version of ELF coredump doesn't support + * dumping fp regs etc. + */ + elf_fpregset_t *fpu; + elf_fpxregset_t *xfpu; + int thread_status_size; +#endif + int notes_size; + int numnote; +}; + +struct vm_area_struct { + target_ulong vma_start; /* start vaddr of memory region */ + target_ulong vma_end; /* end vaddr of memory region */ + abi_ulong vma_flags; /* protection etc. flags for the region */ + QTAILQ_ENTRY(vm_area_struct) vma_link; +}; + +struct mm_struct { + QTAILQ_HEAD(, vm_area_struct) mm_mmap; + int mm_count; /* number of mappings */ +}; + +static struct mm_struct *vma_init(void); +static void vma_delete(struct mm_struct *); +static int vma_add_mapping(struct mm_struct *, target_ulong, + target_ulong, abi_ulong); +static int vma_get_mapping_count(const struct mm_struct *); +static struct vm_area_struct *vma_first(const struct mm_struct *); +static struct vm_area_struct *vma_next(struct vm_area_struct *); +static abi_ulong vma_dump_size(const struct vm_area_struct *); +static int vma_walker(void *priv, target_ulong start, target_ulong end, + unsigned long flags); + +static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); +static void fill_note(struct memelfnote *, const char *, int, + unsigned int, void *); +static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); +static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); +static void fill_auxv_note(struct memelfnote *, const TaskState *); +static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); +static size_t note_size(const struct memelfnote *); +static void free_note_info(struct elf_note_info *); +static int fill_note_info(struct elf_note_info *, long, const CPUArchState *); +static void fill_thread_info(struct elf_note_info *, const CPUArchState *); +static int core_dump_filename(const TaskState *, char *, size_t); + +static int dump_write(int, const void *, size_t); +static int write_note(struct memelfnote *, int); +static int write_note_info(struct elf_note_info *, int); + +#ifdef BSWAP_NEEDED +static void bswap_prstatus(struct target_elf_prstatus *prstatus) +{ + prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo); + prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code); + prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno); + prstatus->pr_cursig = tswap16(prstatus->pr_cursig); + prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend); + prstatus->pr_sighold = tswapal(prstatus->pr_sighold); + prstatus->pr_pid = tswap32(prstatus->pr_pid); + prstatus->pr_ppid = tswap32(prstatus->pr_ppid); + prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); + prstatus->pr_sid = tswap32(prstatus->pr_sid); + /* cpu times are not filled, so we skip them */ + /* regs should be in correct format already */ + prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); +} + +static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) +{ + psinfo->pr_flag = tswapal(psinfo->pr_flag); + psinfo->pr_uid = tswap16(psinfo->pr_uid); + psinfo->pr_gid = tswap16(psinfo->pr_gid); + psinfo->pr_pid = tswap32(psinfo->pr_pid); + psinfo->pr_ppid = tswap32(psinfo->pr_ppid); + psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); + psinfo->pr_sid = tswap32(psinfo->pr_sid); +} + +static void bswap_note(struct elf_note *en) +{ + bswap32s(&en->n_namesz); + bswap32s(&en->n_descsz); + bswap32s(&en->n_type); +} +#else +static inline void bswap_prstatus(struct target_elf_prstatus *p) { } +static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {} +static inline void bswap_note(struct elf_note *en) { } +#endif /* BSWAP_NEEDED */ + +/* + * Minimal support for linux memory regions. These are needed + * when we are finding out what memory exactly belongs to + * emulated process. No locks needed here, as long as + * thread that received the signal is stopped. + */ + +static struct mm_struct *vma_init(void) +{ + struct mm_struct *mm; + + if ((mm = g_malloc(sizeof (*mm))) == NULL) + return (NULL); + + mm->mm_count = 0; + QTAILQ_INIT(&mm->mm_mmap); + + return (mm); +} + +static void vma_delete(struct mm_struct *mm) +{ + struct vm_area_struct *vma; + + while ((vma = vma_first(mm)) != NULL) { + QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); + g_free(vma); + } + g_free(mm); +} + +static int vma_add_mapping(struct mm_struct *mm, target_ulong start, + target_ulong end, abi_ulong flags) +{ + struct vm_area_struct *vma; + + if ((vma = g_malloc0(sizeof (*vma))) == NULL) + return (-1); + + vma->vma_start = start; + vma->vma_end = end; + vma->vma_flags = flags; + + QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); + mm->mm_count++; + + return (0); +} + +static struct vm_area_struct *vma_first(const struct mm_struct *mm) +{ + return (QTAILQ_FIRST(&mm->mm_mmap)); +} + +static struct vm_area_struct *vma_next(struct vm_area_struct *vma) +{ + return (QTAILQ_NEXT(vma, vma_link)); +} + +static int vma_get_mapping_count(const struct mm_struct *mm) +{ + return (mm->mm_count); +} + +/* + * Calculate file (dump) size of given memory region. + */ +static abi_ulong vma_dump_size(const struct vm_area_struct *vma) +{ + /* if we cannot even read the first page, skip it */ + if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE)) + return (0); + + /* + * Usually we don't dump executable pages as they contain + * non-writable code that debugger can read directly from + * target library etc. However, thread stacks are marked + * also executable so we read in first page of given region + * and check whether it contains elf header. If there is + * no elf header, we dump it. + */ + if (vma->vma_flags & PROT_EXEC) { + char page[TARGET_PAGE_SIZE]; + + copy_from_user(page, vma->vma_start, sizeof (page)); + if ((page[EI_MAG0] == ELFMAG0) && + (page[EI_MAG1] == ELFMAG1) && + (page[EI_MAG2] == ELFMAG2) && + (page[EI_MAG3] == ELFMAG3)) { + /* + * Mappings are possibly from ELF binary. Don't dump + * them. + */ + return (0); + } + } + + return (vma->vma_end - vma->vma_start); +} + +static int vma_walker(void *priv, target_ulong start, target_ulong end, + unsigned long flags) +{ + struct mm_struct *mm = (struct mm_struct *)priv; + + vma_add_mapping(mm, start, end, flags); + return (0); +} + +static void fill_note(struct memelfnote *note, const char *name, int type, + unsigned int sz, void *data) +{ + unsigned int namesz; + + namesz = strlen(name) + 1; + note->name = name; + note->namesz = namesz; + note->namesz_rounded = roundup(namesz, sizeof (int32_t)); + note->type = type; + note->datasz = sz; + note->datasz_rounded = roundup(sz, sizeof (int32_t)); + + note->data = data; + + /* + * We calculate rounded up note size here as specified by + * ELF document. + */ + note->notesz = sizeof (struct elf_note) + + note->namesz_rounded + note->datasz_rounded; +} + +static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, + uint32_t flags) +{ + (void) memset(elf, 0, sizeof(*elf)); + + (void) memcpy(elf->e_ident, ELFMAG, SELFMAG); + elf->e_ident[EI_CLASS] = ELF_CLASS; + elf->e_ident[EI_DATA] = ELF_DATA; + elf->e_ident[EI_VERSION] = EV_CURRENT; + elf->e_ident[EI_OSABI] = ELF_OSABI; + + elf->e_type = ET_CORE; + elf->e_machine = machine; + elf->e_version = EV_CURRENT; + elf->e_phoff = sizeof(struct elfhdr); + elf->e_flags = flags; + elf->e_ehsize = sizeof(struct elfhdr); + elf->e_phentsize = sizeof(struct elf_phdr); + elf->e_phnum = segs; + + bswap_ehdr(elf); +} + +static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) +{ + phdr->p_type = PT_NOTE; + phdr->p_offset = offset; + phdr->p_vaddr = 0; + phdr->p_paddr = 0; + phdr->p_filesz = sz; + phdr->p_memsz = 0; + phdr->p_flags = 0; + phdr->p_align = 0; + + bswap_phdr(phdr, 1); +} + +static size_t note_size(const struct memelfnote *note) +{ + return (note->notesz); +} + +static void fill_prstatus(struct target_elf_prstatus *prstatus, + const TaskState *ts, int signr) +{ + (void) memset(prstatus, 0, sizeof (*prstatus)); + prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; + prstatus->pr_pid = ts->ts_tid; + prstatus->pr_ppid = getppid(); + prstatus->pr_pgrp = getpgrp(); + prstatus->pr_sid = getsid(0); + + bswap_prstatus(prstatus); +} + +static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) +{ + char *base_filename; + unsigned int i, len; + + (void) memset(psinfo, 0, sizeof (*psinfo)); + + len = ts->info->arg_end - ts->info->arg_start; + if (len >= ELF_PRARGSZ) + len = ELF_PRARGSZ - 1; + if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len)) + return -EFAULT; + for (i = 0; i < len; i++) + if (psinfo->pr_psargs[i] == 0) + psinfo->pr_psargs[i] = ' '; + psinfo->pr_psargs[len] = 0; + + psinfo->pr_pid = getpid(); + psinfo->pr_ppid = getppid(); + psinfo->pr_pgrp = getpgrp(); + psinfo->pr_sid = getsid(0); + psinfo->pr_uid = getuid(); + psinfo->pr_gid = getgid(); + + base_filename = g_path_get_basename(ts->bprm->filename); + /* + * Using strncpy here is fine: at max-length, + * this field is not NUL-terminated. + */ + (void) strncpy(psinfo->pr_fname, base_filename, + sizeof(psinfo->pr_fname)); + + g_free(base_filename); + bswap_psinfo(psinfo); + return (0); +} + +static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) +{ + elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; + elf_addr_t orig_auxv = auxv; + void *ptr; + int len = ts->info->auxv_len; + + /* + * Auxiliary vector is stored in target process stack. It contains + * {type, value} pairs that we need to dump into note. This is not + * strictly necessary but we do it here for sake of completeness. + */ + + /* read in whole auxv vector and copy it to memelfnote */ + ptr = lock_user(VERIFY_READ, orig_auxv, len, 0); + if (ptr != NULL) { + fill_note(note, "CORE", NT_AUXV, len, ptr); + unlock_user(ptr, auxv, len); + } +} + +/* + * Constructs name of coredump file. We have following convention + * for the name: + * qemu__-