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Bintuils-current initializes the GOT entries to 0 (instead of the

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base-relative offsets that were placed there previously), so we
must use a different mechanism to compute our reloc base.

Patch from Charles Hannum.
This commit is contained in:
thorpej 2002-12-04 01:19:37 +00:00
parent 805040f592
commit 044aeabaad
1 changed files with 12 additions and 8 deletions
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20
libexec/ld.elf_so/arch/powerpc/rtld_start.S
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@ -1,4 +1,4 @@
/* $NetBSD: rtld_start.S,v 1.12 2002/10/31 20:23:25 matt Exp $ */
/* $NetBSD: rtld_start.S,v 1.13 2002/12/04 01:19:37 thorpej Exp $ */
/*-
* Copyright (C) 1998 Tsubai Masanari
@ -44,19 +44,23 @@ _rtld_start:
/* stw %r7,28(%r1) # cleanup (always 0) */
stw %r8,32(%r1) # ps_strings
bl _GLOBAL_OFFSET_TABLE_@local-4
bl _GLOBAL_OFFSET_TABLE_-4@local
mflr %r31 # r31 = (real) GOT
lwz %r30,_GLOBAL_OFFSET_TABLE_@got(31)
# the linker thought GOT were ...
lwz %r3,_DYNAMIC@got(%r31)
lwz %r28,0(%r31) # base-relative &_DYNAMIC
subf %r4,%r30,%r31 # r4 = relocbase
add %r3,%r3,%r4 # r3 = &_DYNAMIC
bl 0f # lr = next instruction
b _DYNAMIC@local
0: mflr %r30
lwz %r29,0(%r30) # load instruction contents
rlwinm %r29,%r29,0,6,29 # extract PC offset
add %r3,%r29,%r30 # r3 = &_DYNAMIC
sub %r28,%r3,%r28
mr %r4,%r28 # r4 = relocbase
bl _rtld_relocate_nonplt_self@plt
subf 4,30,31 # r4 = relocbase
lwz %r3,16(%r1)
addi %r3,%r3,-12 # sp = &argv[-3] /* XXX */
mr %r4,%r28 # r4 = relocbase
bl _rtld@plt # _start = _rtld(sp, relocbase)
mtlr %r3