glibc: update crt0 code to 2.42

Author: alexrp

lib/libc/glibc/elf/elf.h

@@ -837,12 +837,15 @@ typedef struct
 #define NT_ARM_ZT	0x40d		/* ARM SME ZT registers.  */
 #define NT_ARM_FPMR	0x40e		/* ARM floating point mode register.  */
 #define NT_ARM_POE	0x40f		/* ARM POE registers.  */
+#define NT_ARM_GCS	0x410		/* ARM GCS state.  */
 #define NT_VMCOREDD	0x700		/* Vmcore Device Dump Note.  */
 #define NT_MIPS_DSP	0x800		/* MIPS DSP ASE registers.  */
 #define NT_MIPS_FP_MODE	0x801		/* MIPS floating-point mode.  */
 #define NT_MIPS_MSA	0x802		/* MIPS SIMD registers.  */
 #define NT_RISCV_CSR	0x900		/* RISC-V Control and Status Registers */
 #define NT_RISCV_VECTOR	0x901		/* RISC-V vector registers */
+#define NT_RISCV_TAGGED_ADDR_CTRL	0x902	/* RISC-V tagged
+						   address control */
 #define NT_LOONGARCH_CPUCFG	0xa00	/* LoongArch CPU config registers.  */
 #define NT_LOONGARCH_CSR	0xa01	/* LoongArch control and
 					   status registers.  */
@@ -2906,19 +2909,6 @@ enum
 
 #define R_AARCH64_NONE            0	/* No relocation.  */
 
-/* ILP32 AArch64 relocs.  */
-#define R_AARCH64_P32_ABS32		  1	/* Direct 32 bit.  */
-#define R_AARCH64_P32_COPY		180	/* Copy symbol at runtime.  */
-#define R_AARCH64_P32_GLOB_DAT		181	/* Create GOT entry.  */
-#define R_AARCH64_P32_JUMP_SLOT		182	/* Create PLT entry.  */
-#define R_AARCH64_P32_RELATIVE		183	/* Adjust by program base.  */
-#define R_AARCH64_P32_TLS_DTPMOD	184	/* Module number, 32 bit.  */
-#define R_AARCH64_P32_TLS_DTPREL	185	/* Module-relative offset, 32 bit.  */
-#define R_AARCH64_P32_TLS_TPREL		186	/* TP-relative offset, 32 bit.  */
-#define R_AARCH64_P32_TLSDESC		187	/* TLS Descriptor.  */
-#define R_AARCH64_P32_IRELATIVE		188	/* STT_GNU_IFUNC relocation. */
-
-/* LP64 AArch64 relocs.  */
 #define R_AARCH64_ABS64         257	/* Direct 64 bit. */
 #define R_AARCH64_ABS32         258	/* Direct 32 bit.  */
 #define R_AARCH64_ABS16		259	/* Direct 16-bit.  */
@@ -4091,6 +4081,7 @@ enum
 #define R_RISCV_TLS_DTPREL64	 9
 #define R_RISCV_TLS_TPREL32	10
 #define R_RISCV_TLS_TPREL64	11
+#define R_RISCV_TLSDESC		12
 #define R_RISCV_BRANCH		16
 #define R_RISCV_JAL		17
 #define R_RISCV_CALL		18
@@ -4116,16 +4107,10 @@ enum
 #define R_RISCV_SUB16		38
 #define R_RISCV_SUB32		39
 #define R_RISCV_SUB64		40
-#define R_RISCV_GNU_VTINHERIT	41
-#define R_RISCV_GNU_VTENTRY	42
+#define R_RISCV_GOT32_PCREL	41
 #define R_RISCV_ALIGN		43
 #define R_RISCV_RVC_BRANCH	44
 #define R_RISCV_RVC_JUMP	45
-#define R_RISCV_RVC_LUI		46
-#define R_RISCV_GPREL_I		47
-#define R_RISCV_GPREL_S		48
-#define R_RISCV_TPREL_I		49
-#define R_RISCV_TPREL_S		50
 #define R_RISCV_RELAX		51
 #define R_RISCV_SUB6		52
 #define R_RISCV_SET6		53
@@ -4137,8 +4122,12 @@ enum
 #define R_RISCV_PLT32		59
 #define R_RISCV_SET_ULEB128	60
 #define R_RISCV_SUB_ULEB128	61
+#define R_RISCV_TLSDESC_HI20	62
+#define R_RISCV_TLSDESC_LOAD_LO12 63
+#define R_RISCV_TLSDESC_ADD_LO12 64
+#define R_RISCV_TLSDESC_CALL	65
 
-#define R_RISCV_NUM		62
+#define R_RISCV_NUM		66
 
 /* RISC-V specific values for the st_other field.  */
 #define STO_RISCV_VARIANT_CC	0x80	/* Function uses variant calling
@@ -4147,7 +4136,7 @@ enum
 /* RISC-V specific values for the sh_type field.  */
 #define SHT_RISCV_ATTRIBUTES	(SHT_LOPROC + 3)
 
-/* RISC-V specific values for the p_type field.  */
+/* RISC-V specific values for the p_type field (deprecated).  */
 #define PT_RISCV_ATTRIBUTES	(PT_LOPROC + 3)
 
 /* RISC-V specific values for the d_tag field.  */

lib/libc/glibc/include/elf.h

@@ -15,6 +15,19 @@
 # define ELF_NOTE_NEXT_OFFSET(namesz, descsz, align) \
   ALIGN_UP (ELF_NOTE_DESC_OFFSET ((namesz), (align)) + (descsz), (align))
 
+# ifdef HIDDEN_VAR_NEEDS_DYNAMIC_RELOC
+#  define DL_ADDRESS_WITHOUT_RELOC(expr) (expr)
+# else
+/* Evaluate EXPR without run-time relocation for it.  EXPR should be an
+   array, an address of an object, or a string literal.  */
+#  define DL_ADDRESS_WITHOUT_RELOC(expr)	\
+  ({						\
+     __auto_type _result = (expr);		\
+     asm ("" : "+r" (_result));			\
+     _result;					\
+   })
+# endif
+
 /* Some information which is not meant for the public and therefore not
    in <elf.h>.  */
 # include <dl-dtprocnum.h>

lib/libc/glibc/include/libc-symbols.h

@@ -155,7 +155,7 @@
   extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))) \
     __attribute_copy__ (name);
 
-/* Zig patch.  weak_hidden_alias was removed from glibc v2.36 (v2.37?), Zig
+/* zig patch: weak_hidden_alias was removed from glibc v2.36 (v2.37?), Zig
    needs it for the v2.32 and earlier {f,l,}stat wrappers, so only include
    in this header for 2.32 and earlier. */
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 32) || __GLIBC__ < 2
@@ -220,7 +220,7 @@
 #define __make_section_unallocated(section_string)	\
   asm (".section " section_string "\n\t.previous");
 
-/* Tacking on "\n\t#" to the section name makes gcc put it's bogus
+/* Tacking on "\n\t#" to the section name makes gcc put its bogus
    section attributes on what looks like a comment to the assembler.  */
 #ifdef HAVE_SECTION_QUOTES
 # define __sec_comment "\"\n\t#\""
@@ -280,7 +280,7 @@ for linking")
 
 
 /*
-
+
 */
 
 #ifdef HAVE_GNU_RETAIN
@@ -807,7 +807,7 @@ for linking")
 #define libm_ifunc_init()
 #define libm_ifunc(name, expr)				\
   __ifunc (name, name, expr, void, libm_ifunc_init)
-
+
 /* These macros facilitate sharing source files with gnulib.
 
    They are here instead of sys/cdefs.h because they should not be

lib/libc/glibc/include/stdlib.h

@@ -368,6 +368,21 @@ struct abort_msg_s
 extern struct abort_msg_s *__abort_msg;
 libc_hidden_proto (__abort_msg)
 
+enum readonly_error_type
+{
+  readonly_noerror,
+  readonly_area_writable,
+  readonly_procfs_inaccessible,
+  readonly_procfs_open_fail,
+};
+
+extern enum readonly_error_type __readonly_area (const void *ptr,
+						 size_t size)
+     attribute_hidden;
+extern enum readonly_error_type __readonly_area_fallback (const void *ptr,
+							  size_t size)
+     attribute_hidden;
+
 # if IS_IN (rtld)
 extern __typeof (unsetenv) unsetenv attribute_hidden;
 extern __typeof (__strtoul_internal) __strtoul_internal attribute_hidden;

lib/libc/glibc/io/fcntl.h

@@ -168,7 +168,7 @@ typedef __pid_t pid_t;
 #endif
 
 
-/* fcntl was a simple symbol until glibc 2.27 inclusive. glibc 2.28 onwards
+/* zig patch: fcntl was a simple symbol until glibc 2.27 inclusive. glibc 2.28 onwards
  * re-defines it to fcntl64 (via #define) if _FILE_OFFSET_BITS == 64. */
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 28) || __GLIBC__ > 2
 /* Do the file control operation described by CMD on FD.
@@ -288,16 +288,17 @@ extern int creat64 (const char *__file, mode_t __mode) __nonnull ((1));
 # define F_TEST  3	/* Test a region for other processes locks.  */
 
 # ifndef __USE_FILE_OFFSET64
-extern int lockf (int __fd, int __cmd, off_t __len);
+extern int lockf (int __fd, int __cmd, off_t __len) __wur;
 # else
 #  ifdef __REDIRECT
-extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
+extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len),
+                       lockf64) __wur;
 #  else
 #   define lockf lockf64
 #  endif
 # endif
 # ifdef __USE_LARGEFILE64
-extern int lockf64 (int __fd, int __cmd, off64_t __len);
+extern int lockf64 (int __fd, int __cmd, off64_t __len) __wur;
 # endif
 #endif
 

lib/libc/glibc/posix/bits/types.h

@@ -217,7 +217,7 @@ typedef int __sig_atomic_t;
 /* Seconds since the Epoch, visible to user code when time_t is too
    narrow only for consistency with the old way of widening too-narrow
    types.  User code should never use __time64_t.  */
-/* Zig patch: Don't check __LIBC here because it breaks fstatat.c on x86. */
+/* zig patch: Don't check __LIBC here because it breaks fstatat.c on x86. */
 #if __TIMESIZE == 64
 # define __time64_t __time_t
 #elif __TIMESIZE != 64

lib/libc/glibc/stdlib/stdlib.h

@@ -985,6 +985,12 @@ __extension__ extern long long int llabs (long long int __x)
      __THROW __attribute__ ((__const__)) __wur;
 #endif
 
+#if __GLIBC_USE (ISOC2Y)
+extern unsigned int uabs (int __x) __THROW __attribute__ ((__const__)) __wur;
+extern unsigned long int ulabs (long int __x) __THROW __attribute__ ((__const__)) __wur;
+__extension__ extern unsigned long long int ullabs (long long int __x)
+     __THROW __attribute__ ((__const__)) __wur;
+#endif
 
 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
    of the value of NUMER over DENOM. */

lib/libc/glibc/sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h

@@ -21,23 +21,13 @@
 
 #include <bits/endian.h>
 
-#ifdef __ILP32__
-# define __SIZEOF_PTHREAD_ATTR_T        32
-# define __SIZEOF_PTHREAD_MUTEX_T       32
-# define __SIZEOF_PTHREAD_MUTEXATTR_T    4
-# define __SIZEOF_PTHREAD_CONDATTR_T     4
-# define __SIZEOF_PTHREAD_RWLOCK_T      48
-# define __SIZEOF_PTHREAD_BARRIER_T     20
-# define __SIZEOF_PTHREAD_BARRIERATTR_T  4
-#else
-# define __SIZEOF_PTHREAD_ATTR_T        64
-# define __SIZEOF_PTHREAD_MUTEX_T       48
-# define __SIZEOF_PTHREAD_MUTEXATTR_T    8
-# define __SIZEOF_PTHREAD_CONDATTR_T     8
-# define __SIZEOF_PTHREAD_RWLOCK_T      56
-# define __SIZEOF_PTHREAD_BARRIER_T     32
-# define __SIZEOF_PTHREAD_BARRIERATTR_T  8
-#endif
+#define __SIZEOF_PTHREAD_ATTR_T		64
+#define __SIZEOF_PTHREAD_MUTEX_T	48
+#define __SIZEOF_PTHREAD_MUTEXATTR_T	8
+#define __SIZEOF_PTHREAD_CONDATTR_T	8
+#define __SIZEOF_PTHREAD_RWLOCK_T	56
+#define __SIZEOF_PTHREAD_BARRIER_T	32
+#define __SIZEOF_PTHREAD_BARRIERATTR_T  8
 #define __SIZEOF_PTHREAD_COND_T         48
 #define __SIZEOF_PTHREAD_RWLOCKATTR_T	8
 

lib/libc/glibc/sysdeps/aarch64/start-2.33.S

@@ -54,22 +54,22 @@ _start:
 	mov	x5, x0
 
 	/* Load argc and a pointer to argv */
-	ldr	PTR_REG (1), [sp, #0]
-	add	x2, sp, #PTR_SIZE
+	ldr	x1, [sp, #0]
+	add	x2, sp, 8
 
 	/* Setup stack limit in argument register */
 	mov	x6, sp
 
 #ifdef PIC
 # ifdef SHARED
         adrp    x0, :got:main
-	ldr     PTR_REG (0), [x0, #:got_lo12:main]
+	ldr     x0, [x0, #:got_lo12:main]
 
         adrp    x3, :got:__libc_csu_init
-	ldr     PTR_REG (3), [x3, #:got_lo12:__libc_csu_init]
+	ldr     x3, [x3, #:got_lo12:__libc_csu_init]
 
         adrp    x4, :got:__libc_csu_fini
-	ldr     PTR_REG (4), [x4, #:got_lo12:__libc_csu_fini]
+	ldr     x4, [x4, #:got_lo12:__libc_csu_fini]
 # else
 	adrp	x0, __wrap_main
 	add	x0, x0, :lo12:__wrap_main
@@ -80,9 +80,18 @@ _start:
 # endif
 #else
 	/* Set up the other arguments in registers */
-	MOVL (0, main)
-	MOVL (3, __libc_csu_init)
-	MOVL (4, __libc_csu_fini)
+	movz    x0, :abs_g3:main
+	movk    x0, :abs_g2_nc:main
+	movk    x0, :abs_g1_nc:main
+	movk    x0, :abs_g0_nc:main
+	movz    x3, :abs_g3:__libc_csu_init
+	movk    x3, :abs_g2_nc:__libc_csu_init
+	movk    x3, :abs_g1_nc:__libc_csu_init
+	movk    x3, :abs_g0_nc:__libc_csu_init
+	movz    x4, :abs_g3:__libc_csu_fini
+	movk    x4, :abs_g2_nc:__libc_csu_fini
+	movk    x4, :abs_g1_nc:__libc_csu_fini
+	movk    x4, :abs_g0_nc:__libc_csu_fini
 #endif
 
 	/* __libc_start_main (main, argc, argv, init, fini, rtld_fini,

lib/libc/glibc/sysdeps/aarch64/start.S

@@ -70,23 +70,25 @@ ENTRY(_start)
 	mov	x5, x0
 
 	/* Load argc and a pointer to argv */
-	ldr	PTR_REG (1), [sp, #0]
-	add	x2, sp, #PTR_SIZE
+	ldr	x1, [sp, #0]
+	add	x2, sp, 8
 
 	/* Setup stack limit in argument register */
 	mov	x6, sp
 
 #ifdef PIC
 # ifdef SHARED
         adrp    x0, :got:main
-	ldr     PTR_REG (0), [x0, #:got_lo12:main]
+	ldr     x0, [x0, #:got_lo12:main]
 # else
 	adrp	x0, __wrap_main
 	add	x0, x0, :lo12:__wrap_main
 # endif
 #else
-	/* Set up the other arguments in registers */
-	MOVL (0, main)
+	movz    x0, :abs_g3:main
+	movk    x0, :abs_g2_nc:main
+	movk    x0, :abs_g1_nc:main
+	movk    x0, :abs_g0_nc:main
 #endif
 	mov	x3, #0		/* Used to be init.  */
 	mov	x4, #0		/* Used to be fini.  */
@@ -106,7 +108,7 @@ ENTRY(_start)
 	   because crt1.o and rcrt1.o share code and the later must avoid the
 	   use of GOT relocations before __libc_start_main is called.  */
 __wrap_main:
-	BTI_C
+	bti	c
 	b	main
 #endif
 END(_start)