sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- The core dispatch loop, for jumping to a code address. ---*/ |
| 4 | /*--- dispatch-x86-solaris.S ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of Valgrind, a dynamic binary instrumentation |
| 9 | framework. |
| 10 | |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame^] | 11 | Copyright (C) 2012-2017 Petr Pavlu |
| 12 | setup@dagobah.cz |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
| 29 | The GNU General Public License is contained in the file COPYING. |
| 30 | */ |
| 31 | |
florian | 3f1d613 | 2015-09-30 20:30:48 +0000 | [diff] [blame] | 32 | #include "pub_core_basics_asm.h" |
| 33 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 34 | #if defined(VGP_x86_solaris) |
| 35 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 36 | #include "pub_core_dispatch_asm.h" |
| 37 | #include "pub_core_transtab_asm.h" |
| 38 | #include "libvex_guest_offsets.h" /* for OFFSET_x86_EIP */ |
| 39 | |
| 40 | |
| 41 | /*------------------------------------------------------------*/ |
| 42 | /*--- ---*/ |
| 43 | /*--- The dispatch loop. VG_(disp_run_translations) is ---*/ |
| 44 | /*--- used to run all translations, ---*/ |
| 45 | /*--- including no-redir ones. ---*/ |
| 46 | /*--- ---*/ |
| 47 | /*------------------------------------------------------------*/ |
| 48 | |
| 49 | /*----------------------------------------------------*/ |
| 50 | /*--- Entry and preamble (set everything up) ---*/ |
| 51 | /*----------------------------------------------------*/ |
| 52 | |
| 53 | /* signature: |
| 54 | void VG_(disp_run_translations)( UWord* two_words, |
| 55 | void* guest_state, |
| 56 | Addr host_addr ); |
| 57 | */ |
| 58 | .text |
| 59 | .globl VG_(disp_run_translations) |
| 60 | .type VG_(disp_run_translations), @function |
| 61 | VG_(disp_run_translations): |
| 62 | /* 0(%esp) holds our return address. */ |
| 63 | /* 4(%esp) holds two_words */ |
| 64 | /* 8(%esp) holds guest_state */ |
| 65 | /* 12(%esp) holds host_addr */ |
| 66 | |
| 67 | /* The preamble */ |
| 68 | |
| 69 | /* Save integer registers, since this is a pseudo-function. */ |
| 70 | pushl %eax |
| 71 | pushl %ebx |
| 72 | pushl %ecx |
| 73 | pushl %edx |
| 74 | pushl %esi |
| 75 | pushl %edi |
| 76 | pushl %ebp |
| 77 | |
| 78 | /* 28+4(%esp) holds two_words */ |
| 79 | /* 28+8(%esp) holds guest_state */ |
| 80 | /* 28+12(%esp) holds host_addr */ |
| 81 | |
| 82 | /* Get the host CPU in the state expected by generated code. */ |
| 83 | |
| 84 | /* set host FPU control word to the default mode expected |
| 85 | by VEX-generated code. See comments in libvex.h for |
| 86 | more info. */ |
| 87 | finit |
| 88 | pushl $0x027F |
| 89 | fldcw (%esp) |
| 90 | addl $4, %esp |
| 91 | |
| 92 | /* set host SSE control word to the default mode expected |
| 93 | by VEX-generated code. */ |
| 94 | cmpl $0, VG_(machine_x86_have_mxcsr) |
| 95 | jz L1 |
| 96 | pushl $0x1F80 |
| 97 | ldmxcsr (%esp) |
| 98 | addl $4, %esp |
| 99 | L1: |
| 100 | /* set dir flag to known value */ |
| 101 | cld |
| 102 | |
| 103 | /* Set up the guest state pointer */ |
| 104 | movl 28+8(%esp), %ebp |
| 105 | |
| 106 | /* and jump into the code cache. Chained translations in |
| 107 | the code cache run, until for whatever reason, they can't |
| 108 | continue. When that happens, the translation in question |
| 109 | will jump (or call) to one of the continuation points |
| 110 | VG_(cp_...) below. */ |
| 111 | jmpl *28+12(%esp) |
| 112 | /*NOTREACHED*/ |
| 113 | |
| 114 | /*----------------------------------------------------*/ |
| 115 | /*--- Postamble and exit. ---*/ |
| 116 | /*----------------------------------------------------*/ |
| 117 | |
| 118 | postamble: |
| 119 | /* At this point, %eax and %edx contain two |
| 120 | words to be returned to the caller. %eax |
| 121 | holds a TRC value, and %edx optionally may |
| 122 | hold another word (for CHAIN_ME exits, the |
| 123 | address of the place to patch.) */ |
| 124 | |
| 125 | /* We're leaving. Check that nobody messed with %mxcsr |
| 126 | or %fpucw. We can't mess with %eax or %edx here as they |
| 127 | holds the tentative return value, but any others are OK. */ |
| 128 | #if !defined(ENABLE_INNER) |
| 129 | /* This check fails for self-hosting, so skip in that case */ |
| 130 | pushl $0 |
| 131 | fstcw (%esp) |
| 132 | cmpl $0x027F, (%esp) |
| 133 | popl %esi /* get rid of the word without trashing %eflags */ |
| 134 | jnz invariant_violation |
| 135 | #endif |
| 136 | # cmpl $0, VG_(machine_x86_have_mxcsr) |
| 137 | jz L2 |
| 138 | pushl $0 |
| 139 | stmxcsr (%esp) |
| 140 | andl $0xFFFFFFC0, (%esp) /* mask out status flags */ |
| 141 | cmpl $0x1F80, (%esp) |
| 142 | popl %esi |
| 143 | jnz invariant_violation |
| 144 | L2: /* otherwise we're OK */ |
| 145 | jmp remove_frame |
| 146 | invariant_violation: |
| 147 | movl $VG_TRC_INVARIANT_FAILED, %eax |
| 148 | movl $0, %edx |
| 149 | |
| 150 | remove_frame: |
| 151 | /* Stash return values */ |
| 152 | movl 28+4(%esp), %edi /* two_words */ |
| 153 | movl %eax, 0(%edi) |
| 154 | movl %edx, 4(%edi) |
| 155 | /* Restore int regs and return. */ |
| 156 | popl %ebp |
| 157 | popl %edi |
| 158 | popl %esi |
| 159 | popl %edx |
| 160 | popl %ecx |
| 161 | popl %ebx |
| 162 | popl %eax |
| 163 | ret |
| 164 | |
| 165 | /*----------------------------------------------------*/ |
| 166 | /*--- Continuation points ---*/ |
| 167 | /*----------------------------------------------------*/ |
| 168 | |
| 169 | /* ------ Chain me to slow entry point ------ */ |
| 170 | .global VG_(disp_cp_chain_me_to_slowEP) |
| 171 | VG_(disp_cp_chain_me_to_slowEP): |
| 172 | /* We got called. The return address indicates |
| 173 | where the patching needs to happen. Collect |
| 174 | the return address and, exit back to C land, |
| 175 | handing the caller the pair (Chain_me_S, RA) */ |
| 176 | movl $VG_TRC_CHAIN_ME_TO_SLOW_EP, %eax |
| 177 | popl %edx |
| 178 | /* 5 = movl $VG_(disp_chain_me_to_slowEP), %edx; |
| 179 | 2 = call *%edx */ |
| 180 | subl $5+2, %edx |
| 181 | jmp postamble |
| 182 | |
| 183 | /* ------ Chain me to fast entry point ------ */ |
| 184 | .global VG_(disp_cp_chain_me_to_fastEP) |
| 185 | VG_(disp_cp_chain_me_to_fastEP): |
| 186 | /* We got called. The return address indicates |
| 187 | where the patching needs to happen. Collect |
| 188 | the return address and, exit back to C land, |
| 189 | handing the caller the pair (Chain_me_F, RA) */ |
| 190 | movl $VG_TRC_CHAIN_ME_TO_FAST_EP, %eax |
| 191 | popl %edx |
| 192 | /* 5 = movl $VG_(disp_chain_me_to_fastEP), %edx; |
| 193 | 2 = call *%edx */ |
| 194 | subl $5+2, %edx |
| 195 | jmp postamble |
| 196 | |
| 197 | /* ------ Indirect but boring jump ------ */ |
| 198 | .global VG_(disp_cp_xindir) |
| 199 | VG_(disp_cp_xindir): |
| 200 | /* Where are we going? */ |
| 201 | movl OFFSET_x86_EIP(%ebp), %eax |
| 202 | |
| 203 | /* stats only */ |
| 204 | addl $1, VG_(stats__n_xindirs_32) |
| 205 | |
| 206 | /* try a fast lookup in the translation cache */ |
| 207 | movl %eax, %ebx /* next guest addr */ |
| 208 | andl $VG_TT_FAST_MASK, %ebx /* entry# */ |
| 209 | movl 0+VG_(tt_fast)(,%ebx,8), %esi /* .guest */ |
| 210 | movl 4+VG_(tt_fast)(,%ebx,8), %edi /* .host */ |
| 211 | cmpl %eax, %esi |
| 212 | jnz fast_lookup_failed |
| 213 | |
| 214 | /* Found a match. Jump to .host. */ |
| 215 | jmp *%edi |
| 216 | ud2 /* persuade insn decoders not to speculate past here */ |
| 217 | |
| 218 | fast_lookup_failed: |
| 219 | /* stats only */ |
| 220 | addl $1, VG_(stats__n_xindir_misses_32) |
| 221 | |
| 222 | movl $VG_TRC_INNER_FASTMISS, %eax |
| 223 | movl $0, %edx |
| 224 | jmp postamble |
| 225 | |
| 226 | /* ------ Assisted jump ------ */ |
| 227 | .global VG_(disp_cp_xassisted) |
| 228 | VG_(disp_cp_xassisted): |
| 229 | /* %ebp contains the TRC */ |
| 230 | movl %ebp, %eax |
| 231 | movl $0, %edx |
| 232 | jmp postamble |
| 233 | |
| 234 | /* ------ Event check failed ------ */ |
| 235 | .global VG_(disp_cp_evcheck_fail) |
| 236 | VG_(disp_cp_evcheck_fail): |
| 237 | movl $VG_TRC_INNER_COUNTERZERO, %eax |
| 238 | movl $0, %edx |
| 239 | jmp postamble |
| 240 | |
| 241 | |
| 242 | .size VG_(disp_run_translations), .-VG_(disp_run_translations) |
| 243 | |
| 244 | #endif // defined(VGP_x86_solaris) |
| 245 | |
florian | 3f1d613 | 2015-09-30 20:30:48 +0000 | [diff] [blame] | 246 | /* Let the linker know we don't need an executable stack */ |
| 247 | MARK_STACK_NO_EXEC |
| 248 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 249 | /*--------------------------------------------------------------------*/ |
| 250 | /*--- end ---*/ |
| 251 | /*--------------------------------------------------------------------*/ |