-/* Copyright (C) 1993, 1996, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1996, 1998, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Brendan Kehoe (brendan@zen.org).
#include <sysdep.h>
#include <features.h>
+#if defined(__ELF__) && defined(PIC)
+ /* Put this at the end of libc's text segment so that all of
+ the direct branches from the syscalls are forward, and
+ thus predicted not taken. */
+ .section .text.last, "ax", @progbits
+#else
.text
- .align 2
+#endif
-#ifdef _LIBC_REENTRANT
+#ifdef PIC
+ /* When building a shared library, we branch here without
+ having loaded the GP. Nor, since it was a direct branch,
+ have we loaded PV with our address. Do both. */
+# define LOADGP br pv, 1f; 1: ldgp gp, 0(pv)
+# define PROLOGUE .prologue 0
+#else
+# define LOADGP ldgp gp, 0(pv)
+# define PROLOGUE .prologue 1
+#endif
+ .align 4
.globl __syscall_error
.ent __syscall_error
__syscall_error:
- ldgp gp, 0(pv)
+
+#if defined(_LIBC_REENTRANT) && defined(USE___THREAD)
+
+ LOADGP
+ PROLOGUE
+ mov v0, t0
+ call_pal PAL_rduniq
+ ldq t1, __libc_errno(gp) !gottprel
+ addq v0, t1, v0
+ stl t0, 0(v0)
+ lda v0, -1
+ ret
+
+#elif defined(_LIBC_REENTRANT)
+
+ LOADGP
lda sp, -16(sp)
.frame sp, 16, ra, 0
stq ra, 0(sp)
stq v0, 8(sp)
.mask 0x4000001, -16
- .prologue 1
+ PROLOGUE
/* Find our per-thread errno address */
+#ifdef PIC
+ bsr ra, __errno_location !samegp
+#else
jsr ra, __errno_location
+#endif
/* Store the error value. */
ldq t0, 8(sp)
ldq ra, 0(sp)
lda sp, 16(sp)
ret
- .end __syscall_error
-#else
-ENTRY(__syscall_error)
- ldgp gp, 0(t12)
- .prologue 1
+#else
+ LOADGP
+ PROLOGUE
stl v0, errno
lda v0, -1
ret
- END(__syscall_error)
-#endif /* _LIBC_REENTRANT */
+#endif
+
+ .end __syscall_error
# include <regdef.h>
#endif
+#include <tls.h> /* Defines USE___THREAD. */
+
+#ifdef IS_IN_rtld
+# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
+#endif
+
+
#ifdef __STDC__
#define __LABEL(x) x##:
#else
label of that number between those two macros! */
#ifdef PROF
-#define PSEUDO(name, syscall_name, args) \
- .globl name; \
- .align 3; \
- .ent name,0; \
+# define PSEUDO_PROLOGUE \
+ .frame sp, 0, ra; \
+ ldgp gp,0(pv); \
+ .set noat; \
+ lda AT,_mcount; \
+ jsr AT,(AT),_mcount; \
+ .set at; \
+ .prologue 1
+# define PSEUDO_LOADGP
+#else
+# define PSEUDO_PROLOGUE \
+ .frame sp, 0, ra; \
+ .prologue 0
+# define PSEUDO_LOADGP \
+ br gp, 2f; \
+2: ldgp gp, 0(gp)
+#endif /* PROF */
+
+#if RTLD_PRIVATE_ERRNO
+# define SYSCALL_ERROR_HANDLER \
+ stl v0, errno(gp) !gprel; \
+ lda v0, -1; \
+ ret
+#else
+# define SYSCALL_ERROR_HANDLER \
+ jmp $31, __syscall_error
+#endif /* RTLD_PRIVATE_ERRNO */
+
+#if defined(PIC) && !RTLD_PRIVATE_ERRNO
+# define PSEUDO(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name,0; \
__LABEL(name) \
- .frame sp, 0, ra; \
- ldgp gp,0(pv); \
- .set noat; \
- lda AT,_mcount; \
- jsr AT,(AT),_mcount; \
- .set at; \
- .prologue 1; \
- ldiq v0, SYS_ify(syscall_name); \
- .set noat; \
- call_pal PAL_callsys; \
- .set at; \
- bne a3, 1996f; \
+ PSEUDO_PROLOGUE; \
+ lda v0, SYS_ify(syscall_name); \
+ call_pal PAL_callsys; \
+ bne a3, __syscall_error !samegp; \
3:
+# undef PSEUDO_END
+# define PSEUDO_END(sym) END(sym)
#else
-#define PSEUDO(name, syscall_name, args) \
- .globl name; \
- .align 3; \
- .ent name,0; \
+# define PSEUDO(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name,0; \
__LABEL(name) \
- .frame sp, 0, ra \
- .prologue 0; \
- ldiq v0, SYS_ify(syscall_name); \
- .set noat; \
- call_pal PAL_callsys; \
- .set at; \
- bne a3, 1996f; \
+ lda v0, SYS_ify(syscall_name); \
+ call_pal PAL_callsys; \
+ bne a3, 1996f; \
3:
-#endif
-#undef PSEUDO_END
-#ifdef PROF
-#define PSEUDO_END(sym) \
+# undef PSEUDO_END
+# define PSEUDO_END(sym) \
1996: \
- jmp zero, __syscall_error; \
- END(sym)
-#else
-#define PSEUDO_END(sym) \
-1996: \
- br gp, 2f; \
-2: ldgp gp, 0(gp); \
- jmp zero, __syscall_error; \
- END(sym)
-#endif
+ PSEUDO_LOADGP; \
+ SYSCALL_ERROR_HANDLER; \
+ END(sym)
+#endif /* PIC && !RTLD_PRIVATE_ERRNO */
#define r0 v0
#define r1 a4
projects / platform / upstream / glibc.git / commitdiff