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Avoid __sigjmp_save for rtld; tailcall in libc.so.
This commit is contained in:
Ulrich Drepper 2006-01-11 22:15:28 +00:00
parent be3497882a
commit 8470e5f2ee
1 changed files with 41 additions and 10 deletions
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51
sysdeps/alpha/setjmp.S
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@ -23,16 +23,22 @@
#define _SETJMP_H
#include <bits/setjmp.h>
.ent __sigsetjmp
.global __sigsetjmp
.ent __sigsetjmp
.global __sigsetjmp
__sigsetjmp:
ldgp gp, 0(pv)
ldgp gp, 0(pv)
$sigsetjmp_local:
subq sp, 16, sp
.frame sp, 16, ra, 0
stq ra, 0(sp)
.mask 0x04000000, -16
#ifndef PIC
#define FRAME 16
subq sp, FRAME, sp
.frame sp, FRAME, ra, 0
stq ra, 0(sp)
.mask 0x04000000, -FRAME
#else
#define FRAME 0
.frame sp, FRAME, ra, 0
#endif
#ifdef PROF
.set noat
lda AT, _mcount
@ -47,10 +53,27 @@ $sigsetjmp_local:
stq s3, JB_S3*8(a0)
stq s4, JB_S4*8(a0)
stq s5, JB_S5*8(a0)
#ifdef PTR_MANGLE
PTR_MANGLE(t1, ra, t0)
stq t1, JB_PC*8(a0)
#else
stq ra, JB_PC*8(a0)
addq sp, 16, t0
#endif
#if defined(PTR_MANGLE) && FRAME == 0
PTR_MANGLE2(t1, sp, t0)
#else
addq sp, FRAME, t1
# ifdef PTR_MANGLE
PTR_MANGLE2(t1, t1, t0)
# endif
#endif
stq t1, JB_SP*8(a0)
#ifdef PTR_MANGLE
PTR_MANGLE2(t1, fp, t0)
stq t1, JB_FP*8(a0)
#else
stq fp, JB_FP*8(a0)
stq t0, JB_SP*8(a0)
#endif
stt $f2, JB_F2*8(a0)
stt $f3, JB_F3*8(a0)
stt $f4, JB_F4*8(a0)
@ -60,12 +83,20 @@ $sigsetjmp_local:
stt $f8, JB_F8*8(a0)
stt $f9, JB_F9*8(a0)
#ifndef PIC
/* Call to C to (potentially) save our signal mask. */
jsr ra, __sigjmp_save
ldq ra, 0(sp)
addq sp, 16, sp
ret
#elif defined NOT_IN_libc && defined IS_IN_rtld
/* In ld.so we never save the signal mask. */
mov 0, v0
ret
#else
/* Tailcall to save the signal mask. */
br $31, __sigjmp_save !samegp
#endif
END(__sigsetjmp)