diff options
Diffstat (limited to 'sysdeps/unix/alpha/sysdep.S')
| -rw-r--r-- | sysdeps/unix/alpha/sysdep.S | 58 |
1 files changed, 46 insertions, 12 deletions
diff --git a/sysdeps/unix/alpha/sysdep.S b/sysdeps/unix/alpha/sysdep.S index 05c00918e6..50c84c1166 100644 --- a/sysdeps/unix/alpha/sysdep.S +++ b/sysdeps/unix/alpha/sysdep.S @@ -1,4 +1,4 @@ -/* 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). @@ -20,24 +20,59 @@ #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) @@ -49,16 +84,15 @@ __syscall_error: 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 |