njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 1 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Trampoline code page stuff. m_trampoline.S ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 5 | |
| 6 | /* |
njn | b9c427c | 2004-12-01 14:14:42 +0000 | [diff] [blame] | 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 9 | |
sewardj | 9ebd6e0 | 2007-01-08 06:01:59 +0000 | [diff] [blame] | 10 | Copyright (C) 2000-2007 Julian Seward |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 11 | jseward@acm.org |
sewardj | 9ebd6e0 | 2007-01-08 06:01:59 +0000 | [diff] [blame] | 12 | Copyright (C) 2006-2007 OpenWorks LLP |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 13 | info@open-works.co.uk |
| 14 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 15 | This program is free software; you can redistribute it and/or |
| 16 | modify it under the terms of the GNU General Public License as |
| 17 | published by the Free Software Foundation; either version 2 of the |
| 18 | License, or (at your option) any later version. |
| 19 | |
| 20 | This program is distributed in the hope that it will be useful, but |
| 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
| 25 | You should have received a copy of the GNU General Public License |
| 26 | along with this program; if not, write to the Free Software |
| 27 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 28 | 02111-1307, USA. |
| 29 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 30 | The GNU General Public License is contained in the file COPYING. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 31 | */ |
| 32 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 33 | #include "pub_core_basics_asm.h" |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 34 | |
| 35 | /* We need pub_core_vkiscnums.h, but the AIX5 formulation |
| 36 | brings in a load of C declarations. Defining this macro |
| 37 | makes them invisible. Yes, a nasty hack. */ |
| 38 | #define VG_IN_ASSEMBLY_SOURCE |
| 39 | # include "pub_core_vkiscnums.h" |
| 40 | #undef VG_IN_ASSEMBLY_SOURCE |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 41 | |
sewardj | 54cacf0 | 2002-04-12 23:24:59 +0000 | [diff] [blame] | 42 | /* ------------------ SIMULATED CPU HELPERS ------------------ */ |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 43 | /* |
| 44 | Replacements for some functions to do with vsyscalls and signals. |
| 45 | This code runs on the simulated CPU. |
sewardj | 54cacf0 | 2002-04-12 23:24:59 +0000 | [diff] [blame] | 46 | */ |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 47 | |
| 48 | /*---------------------- x86-linux ----------------------*/ |
| 49 | #if defined(VGP_x86_linux) |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 50 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 51 | # define UD2_16 ud2 ; ud2 ; ud2 ; ud2 ;ud2 ; ud2 ; ud2 ; ud2 |
| 52 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 53 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 54 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 55 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 56 | |
| 57 | /* a leading page of unexecutable code */ |
| 58 | UD2_PAGE |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 59 | |
| 60 | .global VG_(trampoline_stuff_start) |
| 61 | VG_(trampoline_stuff_start): |
| 62 | |
| 63 | .global VG_(x86_linux_SUBST_FOR_sigreturn) |
| 64 | VG_(x86_linux_SUBST_FOR_sigreturn): |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 65 | /* This is a very specific sequence which GDB uses to |
sewardj | a672ea3 | 2006-04-29 18:03:14 +0000 | [diff] [blame] | 66 | recognize signal handler frames. Also gcc: see |
| 67 | x86_fallback_frame_state() in |
| 68 | gcc-4.1.0/gcc/config/i386/linux-unwind.h */ |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 69 | popl %eax |
sewardj | cfdc5fd | 2007-08-24 20:37:09 +0000 | [diff] [blame] | 70 | movl $ __NR_sigreturn, %eax |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 71 | int $0x80 |
| 72 | ud2 |
| 73 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 74 | .global VG_(x86_linux_SUBST_FOR_rt_sigreturn) |
| 75 | VG_(x86_linux_SUBST_FOR_rt_sigreturn): |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 76 | /* Likewise for rt signal frames */ |
sewardj | cfdc5fd | 2007-08-24 20:37:09 +0000 | [diff] [blame] | 77 | movl $ __NR_rt_sigreturn, %eax |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 78 | int $0x80 |
| 79 | ud2 |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 80 | |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 81 | /* There's no particular reason that this needs to be handwritten |
| 82 | assembly, but since that's what this file contains, here's a |
| 83 | simple index implementation (written in C and compiled by gcc.) |
| 84 | |
| 85 | unsigned char* REDIR_FOR_index ( const char* s, int c ) |
| 86 | { |
sewardj | d1dea99 | 2007-08-27 10:46:39 +0000 | [diff] [blame] | 87 | unsigned char ch = (unsigned char)((unsigned int)c); |
| 88 | unsigned char* p = (unsigned char*)s; |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 89 | while (1) { |
sewardj | d1dea99 | 2007-08-27 10:46:39 +0000 | [diff] [blame] | 90 | if (*p == ch) return p; |
| 91 | if (*p == 0) return 0; |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 92 | p++; |
| 93 | } |
| 94 | } |
| 95 | */ |
| 96 | .global VG_(x86_linux_REDIR_FOR_index) |
| 97 | .type VG_(x86_linux_REDIR_FOR_index), @function |
| 98 | VG_(x86_linux_REDIR_FOR_index): |
| 99 | pushl %ebp |
| 100 | movl %esp, %ebp |
sewardj | d1dea99 | 2007-08-27 10:46:39 +0000 | [diff] [blame] | 101 | movl 8(%ebp), %eax |
| 102 | movzbl 12(%ebp), %ecx |
| 103 | movzbl (%eax), %edx |
| 104 | cmpb %dl, %cl |
| 105 | jne .L9 |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 106 | jmp .L2 |
sewardj | d1dea99 | 2007-08-27 10:46:39 +0000 | [diff] [blame] | 107 | .L11: |
| 108 | addl $1, %eax |
| 109 | movzbl (%eax), %edx |
| 110 | cmpb %dl, %cl |
| 111 | je .L2 |
| 112 | .L9: |
| 113 | testb %dl, %dl |
| 114 | jne .L11 |
| 115 | xorl %eax, %eax |
| 116 | .L2: |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 117 | popl %ebp |
| 118 | ret |
| 119 | .size VG_(x86_linux_REDIR_FOR_index), .-VG_(x86_linux_REDIR_FOR_index) |
| 120 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 121 | .global VG_(trampoline_stuff_end) |
| 122 | VG_(trampoline_stuff_end): |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 123 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 124 | /* and a trailing page of unexecutable code */ |
| 125 | UD2_PAGE |
| 126 | |
| 127 | # undef UD2_16 |
| 128 | # undef UD2_64 |
| 129 | # undef UD2_256 |
| 130 | # undef UD2_1024 |
| 131 | # undef UD2_PAGE |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 132 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 133 | /*---------------------- amd64-linux ----------------------*/ |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 134 | #else |
| 135 | #if defined(VGP_amd64_linux) |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 136 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 137 | # define UD2_16 ud2 ; ud2 ; ud2 ; ud2 ;ud2 ; ud2 ; ud2 ; ud2 |
| 138 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 139 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 140 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 141 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 142 | |
| 143 | /* a leading page of unexecutable code */ |
| 144 | UD2_PAGE |
| 145 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 146 | .global VG_(trampoline_stuff_start) |
| 147 | VG_(trampoline_stuff_start): |
| 148 | |
| 149 | .global VG_(amd64_linux_SUBST_FOR_rt_sigreturn) |
| 150 | VG_(amd64_linux_SUBST_FOR_rt_sigreturn): |
| 151 | /* This is a very specific sequence which GDB uses to |
| 152 | recognize signal handler frames. */ |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 153 | movq $__NR_rt_sigreturn, %rax |
| 154 | syscall |
| 155 | ud2 |
| 156 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 157 | .global VG_(amd64_linux_REDIR_FOR_vgettimeofday) |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 158 | .type VG_(amd64_linux_REDIR_FOR_vgettimeofday), @function |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 159 | VG_(amd64_linux_REDIR_FOR_vgettimeofday): |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 160 | .LfnB2: |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 161 | movq $__NR_gettimeofday, %rax |
| 162 | syscall |
| 163 | ret |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 164 | .LfnE2: |
| 165 | .size VG_(amd64_linux_REDIR_FOR_vgettimeofday), .-LfnB2 |
| 166 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 167 | .global VG_(amd64_linux_REDIR_FOR_vtime) |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 168 | .type VG_(amd64_linux_REDIR_FOR_vtime), @function |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 169 | VG_(amd64_linux_REDIR_FOR_vtime): |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 170 | .LfnB3: |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 171 | movq $__NR_time, %rax |
| 172 | syscall |
| 173 | ret |
sewardj | 542eada | 2007-02-27 18:37:21 +0000 | [diff] [blame] | 174 | .LfnE3: |
| 175 | .size VG_(amd64_linux_REDIR_FOR_vtime), .-LfnB3 |
| 176 | |
| 177 | /* A CIE for the above two functions, followed by their FDEs */ |
| 178 | .section .eh_frame,"a",@progbits |
| 179 | .Lframe1: |
| 180 | .long .LEcie1-.LScie1 |
| 181 | .LScie1: |
| 182 | .long 0x0 |
| 183 | .byte 0x1 |
| 184 | .string "zR" |
| 185 | .uleb128 0x1 |
| 186 | .sleb128 -8 |
| 187 | .byte 0x10 |
| 188 | .uleb128 0x1 |
| 189 | .byte 0x3 |
| 190 | .byte 0xc |
| 191 | .uleb128 0x7 |
| 192 | .uleb128 0x8 |
| 193 | .byte 0x90 |
| 194 | .uleb128 0x1 |
| 195 | .align 8 |
| 196 | .LEcie1: |
| 197 | .LSfde2: |
| 198 | .long .LEfde2-.LASfde2 |
| 199 | .LASfde2: |
| 200 | .long .LASfde2-.Lframe1 |
| 201 | .long .LfnB2 |
| 202 | .long .LfnE2-.LfnB2 |
| 203 | .uleb128 0x0 |
| 204 | .align 8 |
| 205 | .LEfde2: |
| 206 | .LSfde3: |
| 207 | .long .LEfde3-.LASfde3 |
| 208 | .LASfde3: |
| 209 | .long .LASfde3-.Lframe1 |
| 210 | .long .LfnB3 |
| 211 | .long .LfnE3-.LfnB3 |
| 212 | .uleb128 0x0 |
| 213 | .align 8 |
| 214 | .LEfde3: |
| 215 | .previous |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 216 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 217 | .global VG_(trampoline_stuff_end) |
| 218 | VG_(trampoline_stuff_end): |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 219 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 220 | /* and a trailing page of unexecutable code */ |
| 221 | UD2_PAGE |
| 222 | |
| 223 | # undef UD2_16 |
| 224 | # undef UD2_64 |
| 225 | # undef UD2_256 |
| 226 | # undef UD2_1024 |
| 227 | # undef UD2_PAGE |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 228 | |
sewardj | 05b5fc1 | 2005-06-21 09:56:56 +0000 | [diff] [blame] | 229 | /*---------------- ppc32-linux ----------------*/ |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 230 | #else |
| 231 | #if defined(VGP_ppc32_linux) |
| 232 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 233 | # define UD2_16 trap ; trap ; trap; trap |
| 234 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 235 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 236 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 237 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 238 | |
| 239 | /* a leading page of unexecutable code */ |
| 240 | UD2_PAGE |
| 241 | |
sewardj | 05b5fc1 | 2005-06-21 09:56:56 +0000 | [diff] [blame] | 242 | .global VG_(trampoline_stuff_start) |
| 243 | VG_(trampoline_stuff_start): |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 244 | |
sewardj | a594026 | 2007-09-10 16:28:38 +0000 | [diff] [blame] | 245 | .global VG_(ppc32_linux_SUBST_FOR_sigreturn) |
| 246 | VG_(ppc32_linux_SUBST_FOR_sigreturn): |
| 247 | li 0,__NR_sigreturn |
| 248 | sc |
| 249 | .long 0 /*illegal insn*/ |
| 250 | |
| 251 | .global VG_(ppc32_linux_SUBST_FOR_rt_sigreturn) |
| 252 | VG_(ppc32_linux_SUBST_FOR_rt_sigreturn): |
| 253 | li 0,__NR_rt_sigreturn |
| 254 | sc |
| 255 | .long 0 /*illegal insn*/ |
| 256 | |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 257 | /* There's no particular reason that this needs to be handwritten |
| 258 | assembly, but since that's what this file contains, here's a |
| 259 | simple strlen implementation (written in C and compiled by gcc.) |
| 260 | */ |
| 261 | .global VG_(ppc32_linux_REDIR_FOR_strlen) |
sewardj | 0b6941e | 2005-10-12 10:00:56 +0000 | [diff] [blame] | 262 | .type VG_(ppc32_linux_REDIR_FOR_strlen), @function |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 263 | VG_(ppc32_linux_REDIR_FOR_strlen): |
| 264 | lbz 4,0(3) |
| 265 | li 9,0 |
| 266 | cmpwi 0,4,0 |
sewardj | 5e7b230 | 2005-10-01 19:12:08 +0000 | [diff] [blame] | 267 | beq- 0,.L18 |
| 268 | .L19: |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 269 | lbzu 5,1(3) |
| 270 | addi 9,9,1 |
| 271 | cmpwi 0,5,0 |
sewardj | 5e7b230 | 2005-10-01 19:12:08 +0000 | [diff] [blame] | 272 | bne+ 0,.L19 |
| 273 | .L18: |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 274 | mr 3,9 |
| 275 | blr |
sewardj | 0b6941e | 2005-10-12 10:00:56 +0000 | [diff] [blame] | 276 | .size VG_(ppc32_linux_REDIR_FOR_strlen), .-VG_(ppc32_linux_REDIR_FOR_strlen) |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 277 | |
sewardj | 5e7b230 | 2005-10-01 19:12:08 +0000 | [diff] [blame] | 278 | /* Ditto strcmp */ |
| 279 | .global VG_(ppc32_linux_REDIR_FOR_strcmp) |
sewardj | 0b6941e | 2005-10-12 10:00:56 +0000 | [diff] [blame] | 280 | .type VG_(ppc32_linux_REDIR_FOR_strcmp), @function |
sewardj | 5e7b230 | 2005-10-01 19:12:08 +0000 | [diff] [blame] | 281 | VG_(ppc32_linux_REDIR_FOR_strcmp): |
| 282 | .L20: |
| 283 | lbz 0,0(3) |
| 284 | cmpwi 7,0,0 |
| 285 | bne- 7,.L21 |
| 286 | lbz 0,0(4) |
| 287 | li 11,0 |
| 288 | cmpwi 7,0,0 |
| 289 | beq- 7,.L22 |
| 290 | .L21: |
| 291 | lbz 0,0(3) |
| 292 | li 11,-1 |
| 293 | cmpwi 7,0,0 |
| 294 | beq- 7,.L22 |
| 295 | lbz 0,0(4) |
| 296 | li 11,1 |
| 297 | cmpwi 7,0,0 |
| 298 | beq- 7,.L22 |
| 299 | lbz 9,0(3) |
| 300 | lbz 0,0(4) |
| 301 | li 11,-1 |
| 302 | cmplw 7,9,0 |
| 303 | blt- 7,.L22 |
| 304 | lbz 9,0(3) |
| 305 | lbz 0,0(4) |
| 306 | li 11,1 |
| 307 | addi 3,3,1 |
| 308 | addi 4,4,1 |
| 309 | cmplw 7,9,0 |
| 310 | ble+ 7,.L20 |
| 311 | .L22: |
| 312 | mr 3,11 |
| 313 | blr |
sewardj | 0b6941e | 2005-10-12 10:00:56 +0000 | [diff] [blame] | 314 | .size VG_(ppc32_linux_REDIR_FOR_strcmp), .-VG_(ppc32_linux_REDIR_FOR_strcmp) |
sewardj | 5e7b230 | 2005-10-01 19:12:08 +0000 | [diff] [blame] | 315 | |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 316 | /* Ditto index/strchr */ |
| 317 | .global VG_(ppc32_linux_REDIR_FOR_strchr) |
| 318 | .type VG_(ppc32_linux_REDIR_FOR_strchr), @function |
| 319 | VG_(ppc32_linux_REDIR_FOR_strchr): |
| 320 | lbz 0,0(3) |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 321 | rlwinm 4,4,0,0xff |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 322 | cmpw 7,4,0 |
| 323 | beqlr 7 |
| 324 | cmpwi 7,0,0 |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 325 | bne 7,.L308 |
| 326 | b .L304 |
| 327 | .L309: |
| 328 | beq 6,.L304 |
| 329 | .L308: |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 330 | lbzu 0,1(3) |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 331 | cmpw 7,4,0 |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 332 | cmpwi 6,0,0 |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 333 | bne 7,.L309 |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 334 | blr |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 335 | .L304: |
| 336 | li 3,0 |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 337 | blr |
| 338 | .size VG_(ppc32_linux_REDIR_FOR_strchr),.-VG_(ppc32_linux_REDIR_FOR_strchr) |
| 339 | |
sewardj | 05b5fc1 | 2005-06-21 09:56:56 +0000 | [diff] [blame] | 340 | .global VG_(trampoline_stuff_end) |
| 341 | VG_(trampoline_stuff_end): |
| 342 | |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 343 | /* and a trailing page of unexecutable code */ |
| 344 | UD2_PAGE |
| 345 | |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 346 | # undef UD2_16 |
| 347 | # undef UD2_64 |
| 348 | # undef UD2_256 |
| 349 | # undef UD2_1024 |
| 350 | # undef UD2_PAGE |
sewardj | 05b5fc1 | 2005-06-21 09:56:56 +0000 | [diff] [blame] | 351 | |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 352 | /*---------------- ppc64-linux ----------------*/ |
| 353 | #else |
| 354 | #if defined(VGP_ppc64_linux) |
| 355 | |
| 356 | # define UD2_16 trap ; trap ; trap; trap |
| 357 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 358 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 359 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 360 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 361 | |
| 362 | /* a leading page of unexecutable code */ |
| 363 | UD2_PAGE |
| 364 | |
| 365 | .global VG_(trampoline_stuff_start) |
| 366 | VG_(trampoline_stuff_start): |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 367 | |
sewardj | 53092c6 | 2007-09-10 16:52:09 +0000 | [diff] [blame] | 368 | .global VG_(ppc64_linux_SUBST_FOR_rt_sigreturn) |
| 369 | VG_(ppc64_linux_SUBST_FOR_rt_sigreturn): |
| 370 | li 0,__NR_rt_sigreturn |
| 371 | sc |
| 372 | .long 0 /*illegal insn*/ |
| 373 | |
sewardj | 658f05a | 2006-01-17 02:21:09 +0000 | [diff] [blame] | 374 | /* See comment in pub_core_trampoline.h for what this is for */ |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 375 | .global VG_(ppctoc_magic_redirect_return_stub) |
| 376 | VG_(ppctoc_magic_redirect_return_stub): |
sewardj | 658f05a | 2006-01-17 02:21:09 +0000 | [diff] [blame] | 377 | trap |
| 378 | |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 379 | /* this function is written using the "dotless" ABI convention */ |
| 380 | .align 2 |
| 381 | .globl VG_(ppc64_linux_REDIR_FOR_strlen) |
| 382 | .section ".opd","aw" |
| 383 | .align 3 |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 384 | VG_(ppc64_linux_REDIR_FOR_strlen): |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 385 | .quad .L.VG_(ppc64_linux_REDIR_FOR_strlen),.TOC.@tocbase,0 |
| 386 | .previous |
| 387 | .size VG_(ppc64_linux_REDIR_FOR_strlen), \ |
| 388 | .L0end-.L.VG_(ppc64_linux_REDIR_FOR_strlen) |
| 389 | .type VG_(ppc64_linux_REDIR_FOR_strlen), @function |
| 390 | |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 391 | .L.VG_(ppc64_linux_REDIR_FOR_strlen): |
| 392 | mr 9,3 |
| 393 | lbz 0,0(3) |
| 394 | li 3,0 |
| 395 | cmpwi 7,0,0 |
| 396 | beqlr 7 |
| 397 | li 3,0 |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 398 | .L01: |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 399 | addi 0,3,1 |
| 400 | extsw 3,0 |
| 401 | lbzx 0,9,3 |
| 402 | cmpwi 7,0,0 |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 403 | bne 7,.L01 |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 404 | blr |
| 405 | .long 0 |
| 406 | .byte 0,0,0,0,0,0,0,0 |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 407 | .L0end: |
cerion | 297c88f | 2005-12-22 15:53:12 +0000 | [diff] [blame] | 408 | |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 409 | /* this function is written using the "dotless" ABI convention */ |
| 410 | .align 2 |
| 411 | .globl VG_(ppc64_linux_REDIR_FOR_strchr) |
| 412 | .section ".opd","aw" |
| 413 | .align 3 |
| 414 | VG_(ppc64_linux_REDIR_FOR_strchr): |
| 415 | .quad .L.VG_(ppc64_linux_REDIR_FOR_strchr),.TOC.@tocbase,0 |
| 416 | .previous |
| 417 | .size VG_(ppc64_linux_REDIR_FOR_strchr), \ |
| 418 | .L1end-.L.VG_(ppc64_linux_REDIR_FOR_strchr) |
| 419 | .type VG_(ppc64_linux_REDIR_FOR_strchr),@function |
| 420 | |
| 421 | .L.VG_(ppc64_linux_REDIR_FOR_strchr): |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 422 | lbz 0,0(3) |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 423 | rldicl 4,4,0,56 |
sewardj | 23c97b6 | 2007-08-27 11:50:39 +0000 | [diff] [blame] | 424 | cmpw 7,4,0 |
| 425 | beqlr 7 |
| 426 | cmpdi 7,0,0 |
| 427 | bne 7,.L18 |
| 428 | b .L14 |
| 429 | .L19: |
| 430 | beq 6,.L14 |
| 431 | .L18: |
| 432 | lbzu 0,1(3) |
| 433 | cmpw 7,4,0 |
| 434 | cmpdi 6,0,0 |
| 435 | bne 7,.L19 |
| 436 | blr |
| 437 | .L14: |
| 438 | li 3,0 |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 439 | blr |
| 440 | .long 0 |
| 441 | .byte 0,0,0,0,0,0,0,0 |
| 442 | .L1end: |
| 443 | |
| 444 | |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 445 | .global VG_(trampoline_stuff_end) |
| 446 | VG_(trampoline_stuff_end): |
| 447 | |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 448 | /* and a trailing page of unexecutable code */ |
| 449 | UD2_PAGE |
| 450 | |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 451 | # undef UD2_16 |
| 452 | # undef UD2_64 |
| 453 | # undef UD2_256 |
| 454 | # undef UD2_1024 |
| 455 | # undef UD2_PAGE |
| 456 | |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 457 | /*---------------- ppc32-aix5 ----------------*/ |
| 458 | #else |
| 459 | #if defined(VGP_ppc32_aix5) |
| 460 | |
| 461 | # define UD2_16 trap ; trap ; trap; trap |
| 462 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 463 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 464 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 465 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 466 | |
| 467 | .csect .text[PR] |
| 468 | |
| 469 | /* a leading page of unexecutable code */ |
| 470 | UD2_PAGE |
| 471 | |
| 472 | .globl VG_(trampoline_stuff_start) |
| 473 | VG_(trampoline_stuff_start): |
| 474 | |
| 475 | /* See pub_core_trampoline.h for an explaination of this. Also |
| 476 | see pub_core_initimg.h, struct AIX5PreloadPage. On entry, r3 |
| 477 | points to an AIX5PreloadPage structure. Note we can only |
| 478 | use r2-r10 as scratch registers here since those are the |
| 479 | only ones restored from the preload page when finally |
| 480 | starting the client. */ |
| 481 | .globl VG_(ppc32_aix5_do_preloads_then_start_client) |
| 482 | VG_(ppc32_aix5_do_preloads_then_start_client): |
| 483 | stwu 1,-1024(1) |
| 484 | stw 3,512(1) /* stash r3 512 bytes up stack */ |
| 485 | |
| 486 | /* Try to load .../vgpreload_core.so */ |
| 487 | lwz 2,0(3) /* r2 = __NR___loadx */ |
| 488 | lwz 5,20(3) /* r5 = off_preloadcorename */ |
| 489 | add 6,3,5 /* r6 = preloadcorename */ |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 490 | addis 1,1,-4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 491 | bl do___loadx |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 492 | addis 1,1,4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 493 | cmpwi 0,3,0 |
| 494 | beq .Lfailed |
| 495 | |
| 496 | /* Try to load .../vgpreload_tool.so, if it exists */ |
| 497 | lwz 3,512(1) /* restore r3 */ |
| 498 | lwz 2,0(3) /* r2 = __NR___loadx */ |
| 499 | lwz 5,24(3) /* r5 = off_preloadtoolname */ |
| 500 | cmpwi 0,5,0 /* skip tool preload if */ |
| 501 | beq .Ltry_preload /* name not present */ |
| 502 | add 6,3,5 /* r6 = preloadtoolname */ |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 503 | addis 1,1,-4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 504 | bl do___loadx |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 505 | addis 1,1,4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 506 | cmpwi 0,3,0 |
| 507 | beq .Lfailed |
| 508 | |
| 509 | .Ltry_preload: |
| 510 | /* Try to load the LD_PRELOAD= file, if it exists */ |
| 511 | lwz 3,512(1) /* restore r3 */ |
| 512 | lwz 2,0(3) /* r2 = __NR___loadx */ |
| 513 | lwz 5,28(3) /* r5 = off_ld_preloadname */ |
| 514 | cmpwi 0,5,0 /* skip ld_preload if */ |
| 515 | beq .Lstart_client /* name not present */ |
| 516 | add 6,3,5 /* r6 = ld_preloadname */ |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 517 | addis 1,1,-4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 518 | bl do___loadx |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 519 | addis 1,1,4 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 520 | cmpwi 0,3,0 |
| 521 | beq .Lfailed |
| 522 | |
| 523 | .Lstart_client: |
| 524 | /* Success. Restore r2-r10 from preloadpage-> and start |
| 525 | the client. */ |
| 526 | lwz 3,512(1) /* restore r3 */ |
| 527 | addi 1,1,1024 |
| 528 | lwz 2,32+4(3) /* preloadpage->client_start */ |
| 529 | mtctr 2 |
| 530 | lwz 2,40+4(3) /* preloadpage->r2 */ |
| 531 | lwz 4,56+4(3) /* preloadpage->r4 */ |
| 532 | lwz 5,64+4(3) /* preloadpage->r5 */ |
| 533 | lwz 6,72+4(3) /* preloadpage->r6 */ |
| 534 | lwz 7,80+4(3) /* preloadpage->r7 */ |
| 535 | lwz 8,88+4(3) /* preloadpage->r8 */ |
| 536 | lwz 9,96+4(3) /* preloadpage->r9 */ |
| 537 | lwz 10,104+4(3) /* preloadpage->r10 */ |
| 538 | lwz 3,48+4(3) /* preloadpage->r3 */ |
| 539 | bctr |
| 540 | /*NOTREACHED*/ |
| 541 | trap |
| 542 | |
| 543 | .Lfailed: |
| 544 | /* __loadx barfed for some reason. Print the error |
| 545 | message and get out. */ |
| 546 | /* First the error msg */ |
| 547 | lwz 3,512(1) /* restore r3 */ |
| 548 | lwz 2,4(3) /* r2 = __NR_kwrite */ |
| 549 | lwz 4,12(3) /* r4 = offset of err msg */ |
| 550 | add 4,4,3 /* r4 = err msg */ |
| 551 | lwz 5,16(3) /* r5 = length err msg */ |
| 552 | li 3,2 /* r3 = stderr */ |
| 553 | bl do_syscall |
| 554 | /* now call the diagnosis fn */ |
| 555 | lwz 3,512(1) /* restore r3 */ |
| 556 | lwz 4,112(3) /* preloadpage->p_diagnose_load_failure */ |
| 557 | lwz 2,4(4) /* get its TOC ptr */ |
| 558 | lwz 4,0(4) /* get its entry point */ |
| 559 | mtlr 4 |
| 560 | blrl |
| 561 | /* Now do _exit(1) */ |
| 562 | lwz 3,512(1) /* restore r3 */ |
| 563 | lwz 2,8(3) /* r2 = __NR_exit */ |
| 564 | li 3,1 /* doing _exit(1) */ |
| 565 | addi 1,1,1024 /* fix stack pointer */ |
| 566 | bl do_syscall |
| 567 | /*NOTREACHED*/ |
| 568 | trap |
| 569 | |
| 570 | do___loadx: |
| 571 | /* On entry: r2 = __NR___loadx, r6 = name of module */ |
| 572 | li 3,1 |
| 573 | slwi 3,3,24 /* r3 = 0x1000000 = VKI_DL_LOAD */ |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 574 | mr 4,1 |
| 575 | lis 5,3 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 576 | li 7,0 |
| 577 | li 8,0 |
| 578 | li 9,0 |
| 579 | li 10,0 |
| 580 | do_syscall: |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 581 | crorc 6,6,6 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 582 | sc |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 583 | trap |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 584 | /* sc continues at 'lr', hence this |
| 585 | constitutes an automatic return */ |
| 586 | |
| 587 | |
| 588 | /* See comment in pub_core_trampoline.h for what this is for */ |
| 589 | .globl VG_(ppctoc_magic_redirect_return_stub) |
| 590 | VG_(ppctoc_magic_redirect_return_stub): |
| 591 | trap |
| 592 | |
| 593 | .globl VG_(trampoline_stuff_end) |
| 594 | VG_(trampoline_stuff_end): |
| 595 | |
| 596 | /* and a trailing page of unexecutable code */ |
| 597 | UD2_PAGE |
| 598 | |
| 599 | # undef UD2_16 |
| 600 | # undef UD2_64 |
| 601 | # undef UD2_256 |
| 602 | # undef UD2_1024 |
| 603 | # undef UD2_PAGE |
| 604 | |
| 605 | /*---------------- ppc64-aix5 ----------------*/ |
| 606 | #else |
| 607 | #if defined(VGP_ppc64_aix5) |
| 608 | |
| 609 | # define UD2_16 trap ; trap ; trap; trap |
| 610 | # define UD2_64 UD2_16 ; UD2_16 ; UD2_16 ; UD2_16 |
| 611 | # define UD2_256 UD2_64 ; UD2_64 ; UD2_64 ; UD2_64 |
| 612 | # define UD2_1024 UD2_256 ; UD2_256 ; UD2_256 ; UD2_256 |
| 613 | # define UD2_PAGE UD2_1024 ; UD2_1024 ; UD2_1024 ; UD2_1024 |
| 614 | |
| 615 | .globl VG_(trampoline_stuff_start) |
| 616 | VG_(trampoline_stuff_start): |
| 617 | /* See pub_core_trampoline.h for an explaination of this. Also |
| 618 | see pub_core_initimg.h, struct AIX5PreloadPage. On entry, r3 |
| 619 | points to an AIX5PreloadPage structure. Note we can only |
| 620 | use r2-r10 as scratch registers here since those are the |
| 621 | only ones restored from the preload page when finally |
| 622 | starting the client. */ |
| 623 | .globl VG_(ppc64_aix5_do_preloads_then_start_client) |
| 624 | VG_(ppc64_aix5_do_preloads_then_start_client): |
| 625 | stdu 1,-1024(1) |
| 626 | std 3,512(1) /* stash r3 512 bytes up stack */ |
| 627 | |
| 628 | /* Try to load .../vgpreload_core.so */ |
| 629 | lwz 2,0(3) /* r2 = __NR_kload */ |
| 630 | lwz 5,20(3) /* r5 = off_preloadcorename */ |
| 631 | add 3,3,5 /* r6 = preloadcorename */ |
| 632 | bl do_kload |
| 633 | cmpdi 0,3,0 |
| 634 | beq .Lfailed |
| 635 | |
| 636 | /* Try to load .../vgpreload_tool.so, if it exists */ |
| 637 | ld 3,512(1) /* restore r3 */ |
| 638 | lwz 2,0(3) /* r2 = __NR_kload */ |
| 639 | lwz 5,24(3) /* r5 = off_preloadtoolname */ |
| 640 | cmpwi 0,5,0 /* skip tool preload if */ |
| 641 | beq .Ltry_preload /* name not present */ |
| 642 | add 3,3,5 /* r6 = preloadtoolname */ |
| 643 | bl do_kload |
| 644 | cmpdi 0,3,0 |
| 645 | beq .Lfailed |
| 646 | |
| 647 | .Ltry_preload: |
| 648 | /* Try to load the LD_PRELOAD= file, if it exists */ |
| 649 | ld 3,512(1) /* restore r3 */ |
| 650 | lwz 2,0(3) /* r2 = __NR_kload */ |
| 651 | lwz 5,28(3) /* r5 = off_ld_preloadname */ |
| 652 | cmpwi 0,5,0 /* skip ld_preload if */ |
| 653 | beq .Lstart_client /* name not present */ |
| 654 | add 3,3,5 /* r6 = ld_preloadname */ |
| 655 | bl do_kload |
| 656 | cmpdi 0,3,0 |
| 657 | beq .Lfailed |
| 658 | |
| 659 | .Lstart_client: |
| 660 | /* Success. Restore r2-r10 from preloadpage-> and start |
| 661 | the client. */ |
| 662 | ld 3,512(1) /* restore r3 */ |
| 663 | addi 1,1,1024 |
| 664 | ld 2,32+0(3) /* preloadpage->client_start */ |
| 665 | mtctr 2 |
| 666 | ld 2,40+0(3) /* preloadpage->r2 */ |
| 667 | ld 4,56+0(3) /* preloadpage->r4 */ |
| 668 | ld 5,64+0(3) /* preloadpage->r5 */ |
| 669 | ld 6,72+0(3) /* preloadpage->r6 */ |
| 670 | ld 7,80+0(3) /* preloadpage->r7 */ |
| 671 | ld 8,88+0(3) /* preloadpage->r8 */ |
| 672 | ld 9,96+0(3) /* preloadpage->r9 */ |
| 673 | ld 10,104+0(3) /* preloadpage->r10 */ |
| 674 | ld 3,48+0(3) /* preloadpage->r3 */ |
| 675 | bctr |
| 676 | /*NOTREACHED*/ |
| 677 | trap |
| 678 | |
| 679 | .Lfailed: |
| 680 | /* __loadx barfed for some reason. Print the error |
| 681 | message and get out. */ |
| 682 | /* First the error msg */ |
| 683 | ld 3,512(1) /* restore r3 */ |
| 684 | lwz 2,4(3) /* r2 = __NR_kwrite */ |
| 685 | lwz 4,12(3) /* r4 = offset of err msg */ |
| 686 | add 4,4,3 /* r4 = err msg */ |
| 687 | lwz 5,16(3) /* r5 = length err msg */ |
| 688 | li 3,2 /* r3 = stderr */ |
| 689 | bl do_syscall |
| 690 | /* now call the diagnosis fn */ |
| 691 | ld 3,512(1) /* restore r3 */ |
| 692 | ld 4,112(3) /* preloadpage->p_diagnose_load_failure */ |
| 693 | ld 11,16(4) |
| 694 | ld 2,8(4) /* get its TOC ptr */ |
| 695 | ld 4,0(4) /* get its entry point */ |
| 696 | mtlr 4 |
| 697 | blrl |
| 698 | /* Now do _exit(1) */ |
| 699 | lwz 3,512(1) /* restore r3 */ |
| 700 | lwz 2,8(3) /* r2 = __NR_exit */ |
| 701 | li 3,1 /* doing _exit(1) */ |
| 702 | addi 1,1,1024 /* fix stack pointer */ |
| 703 | bl do_syscall |
| 704 | /*NOTREACHED*/ |
| 705 | trap |
| 706 | |
| 707 | do_kload: |
| 708 | /* On entry: r2 = __NR_kload, r3 = name of module */ |
| 709 | li 4,0 |
| 710 | li 5,0 |
| 711 | li 6,0 |
| 712 | li 7,0 |
| 713 | li 8,0 |
| 714 | li 9,0 |
| 715 | li 10,0 |
| 716 | do_syscall: |
sewardj | 1355264 | 2006-11-10 22:47:27 +0000 | [diff] [blame] | 717 | crorc 6,6,6 |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 718 | sc |
| 719 | /* sc continues at 'lr', hence this |
| 720 | constitutes an automatic return */ |
| 721 | |
| 722 | /* See comment in pub_core_trampoline.h for what this is for */ |
| 723 | .globl VG_(ppctoc_magic_redirect_return_stub) |
| 724 | VG_(ppctoc_magic_redirect_return_stub): |
| 725 | trap |
| 726 | |
| 727 | .globl VG_(trampoline_stuff_end) |
| 728 | VG_(trampoline_stuff_end): |
| 729 | |
| 730 | /* and a trailing page of unexecutable code */ |
| 731 | UD2_PAGE |
| 732 | |
| 733 | # undef UD2_16 |
| 734 | # undef UD2_64 |
| 735 | # undef UD2_256 |
| 736 | # undef UD2_1024 |
| 737 | # undef UD2_PAGE |
| 738 | |
sewardj | 05b5fc1 | 2005-06-21 09:56:56 +0000 | [diff] [blame] | 739 | /*---------------- unknown ----------------*/ |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 740 | #else |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 741 | # error Unknown platform |
| 742 | |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 743 | #endif |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 744 | #endif |
| 745 | #endif |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 746 | #endif |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 747 | #endif |
| 748 | #endif |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 749 | |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 750 | #if defined(VGO_linux) |
thughes | 4ad52d0 | 2004-06-27 17:37:21 +0000 | [diff] [blame] | 751 | /* Let the linker know we don't need an executable stack */ |
| 752 | .section .note.GNU-stack,"",@progbits |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 753 | #endif |
| 754 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 755 | /*--------------------------------------------------------------------*/ |
| 756 | /*--- end ---*/ |
| 757 | /*--------------------------------------------------------------------*/ |