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Make sure r1 is preserved _rtld_bind_start.

This commit is contained in:
matt 2014-03-22 15:13:10 +00:00
parent 7c7fa700e5
commit a1f21652d9
1 changed files with 6 additions and 2 deletions
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8
libexec/ld.elf_so/arch/vax/rtld_start.S
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@ -1,4 +1,4 @@
/* $NetBSD: rtld_start.S,v 1.21 2014/03/21 14:03:30 matt Exp $ */
/* $NetBSD: rtld_start.S,v 1.22 2014/03/22 15:13:10 matt Exp $ */
/*
* Copyright 1996 Matt Thomas <matt@3am-software.com>
@ -61,6 +61,7 @@ END(_rtld_start)
* SP+0: obj entry points
*/
ALTENTRY(_rtld_bind_start)
pushl %r1 /* need to preserve r1 */
movq -8(%fp),%r0 /* get addresses of plt.got & reloc index */
pushl (%r1) /* push relocation offset */
pushl %r0 /* push address of obj entry */
@ -95,7 +96,8 @@ ALTENTRY(_rtld_bind_start)
11: movl %r1,16(%fp) /* backup to the calls/callg */
jbc $29,4(%fp),12f /* skip if this was a callg */
clrl (%ap) /* clear argument count */
12: ret /* return and redo the call */
12: movl (%sp)+,%r1 /* restore r1 */
ret /* return and redo the call */
#if 1
20:
@ -114,11 +116,13 @@ ALTENTRY(_rtld_bind_start)
movq 4(%fp),%r2 /* fetch callframe status & saved AP */
movq 12(%fp),%r4 /* fetch callframe saved FP & PC */
insv %r1,$16,$12,%r2 /* update save mask */
movl (%sp)+,%fp /* use fp to keep saved r1 */
movl %ap,%sp /* reset stack to top of callframe */
22: pushr %r1 /* push registers */
movq %r4,-(%sp) /* push callframe saved FP & PC */
movq %r2,-(%sp) /* push callframe status & saved AP */
pushl $0 /* push condition handler */
movl %fp,%r1 /* restore r1 */
movl %sp,%fp /* sp == fp now */
#if 1
jmp 2(%r0) /* jump past entry mask */