DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=4 sw=4 et tw=99:
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Jaegermonkey.
 *
 * The Initial Developer of the Original Code is the Mozilla Foundation.
 *
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Chao-ying Fu <fu@mips.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "jstypes.h"

/*
 * The MIPS VMFrame is 112 bytes as follows.
 *
 * 108  [ unused4      ] For alignment.
 * 104  [ ra           ] 
 * 100  [ gp           ] If PIC code is generated, we will save gp.
 *  96  [ s7           ] 
 *  92  [ s6           ] 
 *  88  [ s5           ] 
 *  84  [ s4           ] 
 *  80  [ s3           ] 
 *  76  [ s2           ] 
 *  72  [ s1           ] 
 *  68  [ s0           ] 
 *  64  [ stubRejoin   ] 
 *  60  [ entrycode    ] 
 *  56  [ entryfp      ]
 *  52  [ stkLimit     ]
 *  48  [ cx           ]
 *  44  [ regs.fp_     ]
 *  40  [ regs.inlined_]
 *  36  [ regs.pc      ]
 *  32  [ regs.sp      ]
 *  28  [ scratch      ]
 *  24  [ previous     ]
 *  20  [ args.ptr2    ]  [ dynamicArgc ]  (union)
 *  16  [ args.ptr     ]  [ lazyArgsObj ]  (union)
 *  12  [ unused3      ] O32 ABI, space for a3 (used in callee)
 *   8  [ unused2      ] O32 ABI, space for a2 (used in callee)
 *   4  [ unused1      ] O32 ABI, space for a1 (used in callee)
 *   0  [ unused0      ] O32 ABI, space for a0 (used in callee)
 */

asm (
    ".text"     "\n"
    ".align 2"  "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerThrowpoline"  "\n"
    ".ent   JaegerThrowpoline"  "\n"
    ".type  JaegerThrowpoline,@function"    "\n"
"JaegerThrowpoline:"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
    "la     $25,js_InternalThrow"   "\n"
    ".reloc 1f,R_MIPS_JALR,js_InternalThrow"    "\n"
"1: jalr    $25"    "\n"
    "move   $4,$29  # set up a0"    "\n"
#else
    "jal    js_InternalThrow"       "\n"
    "move   $4,$29  # set up a0"    "\n"
#endif
    "beq    $2,$0,1f"   "\n"
    "nop"   "\n"
    "jr     $2  # jump to a scripted handler"   "\n"
    "nop"   "\n"
"1:"        "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
    "la     $25,PopActiveVMFrame"   "\n"
    ".reloc 1f,R_MIPS_JALR,PopActiveVMFrame"    "\n"
"1:  jalr   $25"    "\n"
    "move   $4,$29  # set up a0"    "\n"
#else
    "jal    PopActiveVMFrame"       "\n"
    "move   $4,$29  # set up a0"    "\n"
#endif
    "lw     $31,104($29)"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
#endif
    "lw     $23,96($29)"    "\n"
    "lw     $22,92($29)"    "\n"
    "lw     $21,88($29)"    "\n"
    "lw     $20,84($29)"    "\n"
    "lw     $19,80($29)"    "\n"
    "lw     $18,76($29)"    "\n"
    "lw     $17,72($29)"    "\n"
    "lw     $16,68($29)"    "\n"
    "li     $2,0    # return 0 to represent an unhandled exception."    "\n"
    "jr     $31"            "\n"
    "addiu  $29,$29,112"    "\n"
    ".set   reorder"        "\n"
    ".set   macro"          "\n"
    ".end   JaegerThrowpoline" "\n"
    ".size  JaegerThrowpoline,.-JaegerThrowpoline"  "\n"
);

asm (
    ".text"     "\n"
    ".align 2"  "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerTrampoline"   "\n"
    ".ent   JaegerTrampoline"   "\n"
    ".type  JaegerTrampoline,@function" "\n"
"JaegerTrampoline:"     "\n"
#if defined(__PIC__)
    "lui    $28,%hi(_gp_disp)"  "\n"
    "addiu  $28,$28,%lo(_gp_disp)"      "\n"
    "addu   $28,$28,$25"    "\n"
#endif
    "addiu  $29,$29,-112"   "\n"
    "sw     $31,104($29)"   "\n"
#if defined(__PIC__)
    "sw     $28,100($29)"   "\n"
#endif
    "sw     $23,96($29)"    "\n"
    "sw     $22,92($29)"    "\n"
    "sw     $21,88($29)"    "\n"
    "sw     $20,84($29)"    "\n"
    "sw     $19,80($29)"    "\n"
    "sw     $18,76($29)"    "\n"
    "sw     $17,72($29)"    "\n"
    "sw     $16,68($29)"    "\n"
    "sw     $0,64($29)  # stubRejoin"	"\n"
    "sw     $5,60($29)  # entrycode"	"\n"
    "sw     $5,56($29)  # entryfp"	"\n"
    "sw     $7,52($29)  # stackLimit"	"\n"
    "sw     $4,48($29)  # cx"	"\n"
    "sw     $5,44($29)  # regs.fp"	"\n"
    "move   $16,$5      # preserve fp to s0"    "\n"
    "move   $17,$6      # preserve code to s1"  "\n"
#if defined(__PIC__)
    "la     $25,PushActiveVMFrame"  "\n"
    ".reloc 1f,R_MIPS_JALR,PushActiveVMFrame"   "\n"
"1:  jalr    $25"    "\n"
    "move   $4,$29  # set up a0"    "\n"
#else
    "jal    PushActiveVMFrame"      "\n"
    "move   $4,$29  # set up a0"    "\n"
#endif

    "move   $25,$17 # move code to $25"	"\n"
    "jr     $25     # jump to the compiled JavaScript Function"	"\n"
    "nop"       "\n"
    ".set   reorder"    "\n"
    ".set   macro"      "\n"
    ".end   JaegerTrampoline"   "\n"
    ".size  JaegerTrampoline,.-JaegerTrampoline"    "\n"
);

asm (
    ".text"     "\n"
    ".align 2"  "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerTrampolineReturn" "\n"
    ".ent   JaegerTrampolineReturn" "\n"
    ".type  JaegerTrampolineReturn,@function"   "\n"
"JaegerTrampolineReturn:"   "\n"
#if defined(IS_LITTLE_ENDIAN)
    "sw     $4,28($16)  # a0: fp->rval type for LITTLE-ENDIAN"  "\n"
    "sw     $6,24($16)  # a2: fp->rval data for LITTLE-ENDIAN"  "\n"
#else
    "sw     $4,24($16)  # a0: fp->rval type for BIG-ENDIAN"     "\n"
    "sw     $6,28($16)  # a2: fp->rval data for BIG-ENDIAN"     "\n"
#endif
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
    "la     $25,PopActiveVMFrame"   "\n"
    ".reloc 1f,R_MIPS_JALR,PopActiveVMFrame"    "\n"
"1:  jalr    $25"    "\n"
    "move   $4,$29  # set up a0"    "\n"
#else
    "jal    PopActiveVMFrame"       "\n"
    "move   $4,$29  # set up a0"    "\n"
#endif
    "lw     $31,104($29)"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
#endif
    "lw     $23,96($29)"    "\n"
    "lw     $22,92($29)"    "\n"
    "lw     $21,88($29)"    "\n"
    "lw     $20,84($29)"    "\n"
    "lw     $19,80($29)"    "\n"
    "lw     $18,76($29)"    "\n"
    "lw     $17,72($29)"    "\n"
    "lw     $16,68($29)"    "\n"
    "li     $2,1    # return ture to indicate successful completion"    "\n"
    "jr     $31"    "\n"
    "addiu  $29,$29,112"    "\n"
    ".set   reorder"        "\n"
    ".set   macro"          "\n"
    ".end   JaegerTrampolineReturn" "\n"
    ".size  JaegerTrampolineReturn,.-JaegerTrampolineReturn"    "\n"
);

asm (
    ".text"     "\n"
    ".align 2" "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerStubVeneer"   "\n"
    ".ent   JaegerStubVeneer"   "\n"
    ".type  JaegerStubVeneer,@function" "\n"
"JaegerStubVeneer:"     "\n"
    "addiu  $29,$29,-24 # Need 16 (a0-a3) + 4 (align) + 4 ($31) bytes"  "\n"
    "sw     $31,20($29) # Store $31 to 20($29)" "\n"
    "move   $25,$2      # the target address is passed from $2"  "\n"
    "jalr   $25"    "\n"
    "nop"           "\n"
    "lw     $31,20($29)"        "\n"
    "jr     $31"    "\n"
    "addiu  $29,$29,24"         "\n"
    ".set   reorder"    "\n"
    ".set   macro"      "\n"
    ".end   JaegerStubVeneer"   "\n"
    ".size  JaegerStubVeneer,.-JaegerStubVeneer"    "\n"
);

asm (
    ".text"     "\n"
    ".align 2" "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerInterpolineScripted"	"\n"
    ".ent   JaegerInterpolineScripted"	"\n"
    ".type  JaegerInterpolineScripted,@function"    "\n"
"JaegerInterpolineScripted:"	"\n"
    "lw     $16,16($16) # Load f->prev_"  "\n"
    "b      JaegerInterpoline"  "\n"
    "sw     $16,44($29) # Update f->regs->fp_"  "\n"
    ".set   reorder"    "\n"
    ".set   macro"      "\n"
    ".end   JaegerInterpolineScripted"   "\n"
    ".size  JaegerInterpolineScripted,.-JaegerInterpolineScripted"  "\n"
);

asm (
    ".text"     "\n"
    ".align 2" "\n"
    ".set   noreorder"  "\n"
    ".set   nomacro"    "\n"
    ".set   nomips16"   "\n"
    ".globl JaegerInterpoline"	"\n"
    ".ent   JaegerInterpoline"	"\n"
    ".type  JaegerInterpoline,@function"    "\n"
"JaegerInterpoline:"	"\n"
    "move   $5,$4   # returntype"   "\n"
    "move   $4,$6   # returnData"   "\n"
    "move   $6,$2   # returnReg"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
    "la     $25,js_InternalInterpret"   "\n"
    ".reloc 1f,R_MIPS_JALR,js_InternalInterpret"    "\n"
"1:  jalr    $25"    "\n"
    "move   $7,$29  # f"    "\n"
#else
    "jal    js_InternalInterpret"   "\n"
    "move   $7,$29  # f"    "\n"
#endif
    "lw     $16,44($29) # Load f->regs->fp_ to s0"  "\n"
#if defined(IS_LITTLE_ENDIAN)
    "lw     $4,28($16)  # a0: fp->rval type for LITTLE-ENDIAN"  "\n"
    "lw     $6,24($16)  # a2: fp->rval data for LITTLE-ENDIAN"  "\n"
#else
    "lw     $4,24($16)  # a0: fp->rval type for BIG-ENDIAN"     "\n"
    "lw     $6,28($16)  # a2: fp->rval data for BIG-ENDIAN"     "\n"
#endif
    "lw     $5,28($29)  # Load sctrach -> argc"     "\n"
    "beq    $2,$0,1f"   "\n"
    "nop"               "\n"
    "jr     $2"         "\n"
    "nop"               "\n"
"1:"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
    "la     $25,PopActiveVMFrame"   "\n"
    ".reloc 1f,R_MIPS_JALR,PopActiveVMFrame"    "\n"
"1:  jalr   $25"    "\n"
    "move   $4,$29  # set up a0"    "\n"
#else
    "jal    PopActiveVMFrame"       "\n"
    "move   $4,$29  # set up a0"    "\n"
#endif
    "lw     $31,104($29)"    "\n"
#if defined(__PIC__)
    "lw     $28,100($29)"    "\n"
#endif
    "lw     $23,96($29)"    "\n"
    "lw     $22,92($29)"    "\n"
    "lw     $21,88($29)"    "\n"
    "lw     $20,84($29)"    "\n"
    "lw     $19,80($29)"    "\n"
    "lw     $18,76($29)"    "\n"
    "lw     $17,72($29)"    "\n"
    "lw     $16,68($29)"    "\n"
    "li     $2,0    # return 0"     "\n"
    "jr     $31"    "\n"
    "addiu  $29,$29,112"    "\n"
    ".set   reorder"    "\n"
    ".set   macro"      "\n"
    ".end   JaegerInterpoline"	"\n"
    ".size  JaegerInterpoline,.-JaegerInterpoline"  "\n"
);