| rtld_start.S (217397) | rtld_start.S (218824) |
|---|---|
| 1/* $NetBSD: rtld_start.S,v 1.4 2001/09/26 04:06:43 mycroft Exp $ */ 2 3/*- 4 * Copyright (C) 1998 Tsubai Masanari 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 12 unchanged lines hidden (view full) --- 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * | 1/* $NetBSD: rtld_start.S,v 1.4 2001/09/26 04:06:43 mycroft Exp $ */ 2 3/*- 4 * Copyright (C) 1998 Tsubai Masanari 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 12 unchanged lines hidden (view full) --- 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * |
| 29 * $FreeBSD: head/libexec/rtld-elf/powerpc64/rtld_start.S 217397 2011-01-14 11:32:31Z kib $ | 29 * $FreeBSD: head/libexec/rtld-elf/powerpc64/rtld_start.S 218824 2011-02-18 21:44:53Z nwhitehorn $ |
| 30 */ 31 32#include <machine/asm.h> 33 34.extern _GLOBAL_OFFSET_TABLE_ 35.extern _DYNAMIC 36 37_ENTRY(_rtld_start) --- 22 unchanged lines hidden (view full) --- 601: 61 mflr %r3 /* PC value at .llong */ 62 ld %r4,0(%r3) /* offset to _DYNAMIC */ 63 add %r3,%r4,%r3 /* r3 = &_DYNAMIC, absolute value */ 64 65 ld %r4,-0x8000(%r2) /* First TOC entry is TOC base */ 66 subf %r4,%r4,%r2 /* Subtract from real TOC base to get base */ 67 | 30 */ 31 32#include <machine/asm.h> 33 34.extern _GLOBAL_OFFSET_TABLE_ 35.extern _DYNAMIC 36 37_ENTRY(_rtld_start) --- 22 unchanged lines hidden (view full) --- 601: 61 mflr %r3 /* PC value at .llong */ 62 ld %r4,0(%r3) /* offset to _DYNAMIC */ 63 add %r3,%r4,%r3 /* r3 = &_DYNAMIC, absolute value */ 64 65 ld %r4,-0x8000(%r2) /* First TOC entry is TOC base */ 66 subf %r4,%r4,%r2 /* Subtract from real TOC base to get base */ 67 |
| 68 bl .reloc_non_plt_self /* reloc_non_plt_self(&_DYNAMIC,base) */ | 68 bl reloc_non_plt_self /* reloc_non_plt_self(&_DYNAMIC,base) */ |
| 69 nop 70 71 /* 72 * The _rtld() function likes to see a stack layout containing 73 * { argc, argv[0], argv[1] ... argv[N], 0, env[0], ... , env[N] } 74 * Since the PowerPC stack was 16-byte aligned at exec time, the 75 * original stack layout has to be found by moving back a word 76 * from the argv pointer. 77 */ 78 ld %r4,104(%r1) 79 addi %r3,%r4,-8 /* locate argc ptr, &argv[-1] */ 80 addi %r4,%r1,128 /* &exit_proc on stack */ 81 addi %r5,%r1,120 /* &obj_main on stack */ 82 | 69 nop 70 71 /* 72 * The _rtld() function likes to see a stack layout containing 73 * { argc, argv[0], argv[1] ... argv[N], 0, env[0], ... , env[N] } 74 * Since the PowerPC stack was 16-byte aligned at exec time, the 75 * original stack layout has to be found by moving back a word 76 * from the argv pointer. 77 */ 78 ld %r4,104(%r1) 79 addi %r3,%r4,-8 /* locate argc ptr, &argv[-1] */ 80 addi %r4,%r1,128 /* &exit_proc on stack */ 81 addi %r5,%r1,120 /* &obj_main on stack */ 82 |
| 83 bl ._rtld /* &_start = _rtld(sp, &exit_proc, &obj_main)*/ | 83 bl _rtld /* &_start = _rtld(sp, &exit_proc, &obj_main)*/ |
| 84 nop 85 ld %r2,8(%r3) 86 ld %r11,16(%r3) 87 ld %r3,0(%r3) 88 mtlr %r3 89 90 /* 91 * Restore args, with new obj/exit proc --- 36 unchanged lines hidden (view full) --- 128 std %r7,64+4*8(%r1) 129 std %r8,64+5*8(%r1) 130 std %r9,64+6*8(%r1) 131 std %r10,64+7*8(%r1) 132 std %r12,64+8*8(%r1) 133 134 ld %r3,0(%r11) 135 ld %r4,8(%r11) | 84 nop 85 ld %r2,8(%r3) 86 ld %r11,16(%r3) 87 ld %r3,0(%r3) 88 mtlr %r3 89 90 /* 91 * Restore args, with new obj/exit proc --- 36 unchanged lines hidden (view full) --- 128 std %r7,64+4*8(%r1) 129 std %r8,64+5*8(%r1) 130 std %r9,64+6*8(%r1) 131 std %r10,64+7*8(%r1) 132 std %r12,64+8*8(%r1) 133 134 ld %r3,0(%r11) 135 ld %r4,8(%r11) |
| 136 bl ._rtld_bind # target addr = _rtld_bind(obj, reloff) | 136 bl _rtld_bind # target addr = _rtld_bind(obj, reloff) |
| 137 nop 138 139 ld %r2,8(%r3) 140 ld %r11,16(%r3) 141 ld %r3,0(%r3) 142 mtctr %r3 # move absolute target addr into ctr 143 144 ld %r3,64+0*8(%r1) # restore r3-r31 --- 18 unchanged lines hidden --- | 137 nop 138 139 ld %r2,8(%r3) 140 ld %r11,16(%r3) 141 ld %r3,0(%r3) 142 mtctr %r3 # move absolute target addr into ctr 143 144 ld %r3,64+0*8(%r1) # restore r3-r31 --- 18 unchanged lines hidden --- |