clean up darwin-user files

Author: tehzz

README.md

@@ -1,16 +1,32 @@
 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):
 
 ```
 configure --target-list=irix-linux-user,irixn32-linux-user,irix64-linux-user,solaris-linux-user
 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

darwin-user/Makefile.objs

@@ -1,6 +1,5 @@
 obj-y = main.o syscall.o strace.o mmap.o signal.o \
 	elfload.o linuxload.o uaccess.o uname.o \
-	safe-syscall.o \
 	shim_fallocate.o shim_gettid.o shim_timers.o
 
 obj-$(TARGET_HAS_BFLT) += flatload.o

darwin-user/host/x86_64/hostdep.h

@@ -12,29 +12,5 @@
 #ifndef X86_64_HOSTDEP_H
 #define X86_64_HOSTDEP_H
 
-/* Turn off safe-syscall for now ... */
-
-// /* We have a safe-syscall.inc.S */
-// #define HAVE_SAFE_SYSCALL
-// 
-// #ifndef __ASSEMBLER__
-// 
-// /* These are defined by the safe-syscall.inc.S file */
-// extern char safe_syscall_start[];
-// extern char safe_syscall_end[];
-// 
-// /* Adjust the signal context to rewind out of safe-syscall if we're in it */
-// static inline void rewind_if_in_safe_syscall(void *puc)
-// {
-//     ucontext_t *uc = puc;
-//     greg_t *pcreg = &uc->uc_mcontext.gregs[REG_RIP];
-// 
-//     if (*pcreg > (uintptr_t)safe_syscall_start
-//         && *pcreg < (uintptr_t)safe_syscall_end) {
-//         *pcreg = (uintptr_t)safe_syscall_start;
-//     }
-// }
-// 
-// #endif /* __ASSEMBLER__ */
 
 #endif