| | 1 | /* |
| | 2 | * Copyright (c) 2004 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_EN |
| | 21 | */ |
| | 22 | |
| | 23 | /* |
| | 24 | * Syscall argument mungers. |
| | 25 | * |
| | 26 | * Passed a pointer to the users register array in the savearea, we copy args into |
| | 27 | * the uu_arg[] array, padding etc as appropriate. The issue is that parameters |
| | 28 | * passed in registers from a 32-bit address space do not map directly into the uu_args. |
| | 29 | * For example, a 32-bit long-long comes in two registers, but we need to combine |
| | 30 | * them into one 64-bit long-long in the uu_args. |
| | 31 | * |
| | 32 | * There are several functions in this file. Each takes two parameters: |
| | 33 | * |
| | 34 | * void munge_XXXX( const void *regs, void *uu_args); |
| | 35 | * |
| | 36 | * The name of the function encodes the number and type of the parameters, as follows: |
| | 37 | * |
| | 38 | * w = a 32-bit value such as an int or a 32-bit ptr, that does not require |
| | 39 | * sign extension. These are handled by skipping a word in the input, |
| | 40 | * zeroing a word of output, and copying a word from input to output. |
| | 41 | * |
| | 42 | * s = a 32-bit value such as a long, which must be sign-extended to a 64-bit |
| | 43 | * long-long in the uu_args. These are handled by skipping a word of |
| | 44 | * input, loading a word of input and sign extending it to a double, |
| | 45 | * and storing two words of output. |
| | 46 | * |
| | 47 | * l = a 64-bit long-long, passed in two registers. These are handled by skipping |
| | 48 | * a word of input, copying a word, skipping another word of input, and |
| | 49 | * copying another word. |
| | 50 | * |
| | 51 | * d = a 32-bit int or a 64-bit ptr or long, passed in via a 64-bit GPR |
| | 52 | * from a 64-bit process. We copy two words from input to output. |
| | 53 | * |
| | 54 | * For example, "munge_wls" takes a word, a long-long, and a word. This takes |
| | 55 | * four registers: the first word is in one, the long-long takes two, and the |
| | 56 | * final word is in the fourth. We store six words: a 0, the low words of the |
| | 57 | * first three registers, and the two words resulting from sign-extending the |
| | 58 | * low word of the fourth register. |
| | 59 | * |
| | 60 | * As you can see, we save a lot of code by collapsing mungers that are prefixes |
| | 61 | * of each other, into the more general routine. This ends up copying a few extra |
| | 62 | * bytes of parameters, but big deal. The old kernel copied all eight words for |
| | 63 | * every system call. |
| | 64 | * |
| | 65 | * These routines assume explicit pad words in the uu_arg structures, that fill out |
| | 66 | * int parameters to 64 bits. Having pad words makes munging args for 64-bit |
| | 67 | * processes the equivalent of a simple bcopy(), though it does introduce an |
| | 68 | * endian dependency. |
| | 69 | */ |
| | 70 | |
| | 71 | .align 5 |
| | 72 | .globl _munge_dddddddd // that is 8 'd's |
| | 73 | _munge_dddddddd: |
| | 74 | .globl _munge_ddddddd |
| | 75 | _munge_ddddddd: |
| | 76 | .globl _munge_dddddd |
| | 77 | _munge_dddddd: |
| | 78 | .globl _munge_ddddd |
| | 79 | _munge_ddddd: |
| | 80 | ld r5,0*8+0(r3) |
| | 81 | ld r6,1*8+0(r3) |
| | 82 | ld r7,2*8+0(r3) |
| | 83 | ld r8,3*8+0(r3) |
| | 84 | ld r9,4*8+0(r3) |
| | 85 | ld r10,5*8+0(r3) |
| | 86 | ld r11,6*8+0(r3) |
| | 87 | ld r12,7*8+0(r3) |
| | 88 | |
| | 89 | std r5,0*8+0(r4) |
| | 90 | std r6,1*8+0(r4) |
| | 91 | std r7,2*8+0(r4) |
| | 92 | std r8,3*8+0(r4) |
| | 93 | std r9,4*8+0(r4) |
| | 94 | std r10,5*8+0(r4) |
| | 95 | std r11,6*8+0(r4) |
| | 96 | std r12,7*8+0(r4) |
| | 97 | |
| | 98 | blr |
| | 99 | |
| | 100 | |
| | 101 | .align 5 |
| | 102 | .globl _munge_dddd |
| | 103 | _munge_dddd: |
| | 104 | .globl _munge_ddd |
| | 105 | _munge_ddd: |
| | 106 | .globl _munge_dd |
| | 107 | _munge_dd: |
| | 108 | .globl _munge_d |
| | 109 | _munge_d: |
| | 110 | ld r5,0*8+0(r3) |
| | 111 | ld r6,1*8+0(r3) |
| | 112 | ld r7,2*8+0(r3) |
| | 113 | ld r8,3*8+0(r3) |
| | 114 | |
| | 115 | std r5,0*8+0(r4) |
| | 116 | std r6,1*8+0(r4) |
| | 117 | std r7,2*8+0(r4) |
| | 118 | std r8,3*8+0(r4) |
| | 119 | |
| | 120 | blr |
| | 121 | |
| | 122 | |
| | 123 | .align 5 |
| | 124 | .globl _munge_wwwwwwww // that is 8 'w's |
| | 125 | _munge_wwwwwwww: |
| | 126 | .globl _munge_wwwwwww |
| | 127 | _munge_wwwwwww: |
| | 128 | .globl _munge_wwwwww |
| | 129 | _munge_wwwwww: |
| | 130 | .globl _munge_wwwww |
| | 131 | _munge_wwwww: |
| | 132 | li r0,0 |
| | 133 | lwz r5,0*8+4(r3) |
| | 134 | lwz r6,1*8+4(r3) |
| | 135 | lwz r7,2*8+4(r3) |
| | 136 | lwz r8,3*8+4(r3) |
| | 137 | lwz r9,4*8+4(r3) |
| | 138 | lwz r10,5*8+4(r3) |
| | 139 | lwz r11,6*8+4(r3) |
| | 140 | lwz r12,7*8+4(r3) |
| | 141 | |
| | 142 | stw r0,0*8+0(r4) |
| | 143 | stw r5,0*8+4(r4) |
| | 144 | stw r0,1*8+0(r4) |
| | 145 | stw r6,1*8+4(r4) |
| | 146 | stw r0,2*8+0(r4) |
| | 147 | stw r7,2*8+4(r4) |
| | 148 | stw r0,3*8+0(r4) |
| | 149 | stw r8,3*8+4(r4) |
| | 150 | stw r0,4*8+0(r4) |
| | 151 | stw r9,4*8+4(r4) |
| | 152 | stw r0,5*8+0(r4) |
| | 153 | stw r10,5*8+4(r4) |
| | 154 | stw r0,6*8+0(r4) |
| | 155 | stw r11,6*8+4(r4) |
| | 156 | stw r0,7*8+0(r4) |
| | 157 | stw r12,7*8+4(r4) |
| | 158 | |
| | 159 | blr |
| | 160 | |
| | 161 | |
| | 162 | .align 5 |
| | 163 | .globl _munge_wwww |
| | 164 | _munge_wwww: |
| | 165 | .globl _munge_www |
| | 166 | _munge_www: |
| | 167 | .globl _munge_ww |
| | 168 | _munge_ww: |
| | 169 | .globl _munge_w |
| | 170 | _munge_w: |
| | 171 | li r0,0 |
| | 172 | lwz r5,0*8+4(r3) |
| | 173 | lwz r6,1*8+4(r3) |
| | 174 | lwz r7,2*8+4(r3) |
| | 175 | lwz r8,3*8+4(r3) |
| | 176 | |
| | 177 | stw r0,0*8+0(r4) |
| | 178 | stw r5,0*8+4(r4) |
| | 179 | stw r0,1*8+0(r4) |
| | 180 | stw r6,1*8+4(r4) |
| | 181 | stw r0,2*8+0(r4) |
| | 182 | stw r7,2*8+4(r4) |
| | 183 | stw r0,3*8+0(r4) |
| | 184 | stw r8,3*8+4(r4) |
| | 185 | |
| | 186 | blr |
| | 187 | |
| | 188 | .align 5 |
| | 189 | .globl _munge_l |
| | 190 | _munge_l: |
| | 191 | li r0,0 |
| | 192 | lwz r5,0*8+4(r3) |
| | 193 | lwz r6,1*8+4(r3) |
| | 194 | |
| | 195 | stw r5,0*8+0(r4) |
| | 196 | stw r6,0*8+4(r4) |
| | 197 | |
| | 198 | blr |
| | 199 | |
| | 200 | .align 5 |
| | 201 | .globl _munge_wlw |
| | 202 | _munge_wlw: |
| | 203 | .globl _munge_wl |
| | 204 | _munge_wl: |
| | 205 | li r0,0 |
| | 206 | lwz r5,0*8+4(r3) |
| | 207 | lwz r6,1*8+4(r3) |
| | 208 | lwz r7,2*8+4(r3) |
| | 209 | lwz r8,3*8+4(r3) |
| | 210 | |
| | 211 | stw r0,0*8+0(r4) |
| | 212 | stw r5,0*8+4(r4) |
| | 213 | stw r6,1*8+0(r4) |
| | 214 | stw r7,1*8+4(r4) |
| | 215 | stw r0,2*8+0(r4) |
| | 216 | stw r8,2*8+4(r4) |
| | 217 | |
| | 218 | blr |
| | 219 | |
| | 220 | |
| | 221 | .align 5 |
| | 222 | .globl _munge_wwwl |
| | 223 | _munge_wwwl: |
| | 224 | li r0,0 |
| | 225 | lwz r5,0*8+4(r3) |
| | 226 | lwz r6,1*8+4(r3) |
| | 227 | lwz r7,2*8+4(r3) |
| | 228 | lwz r8,3*8+4(r3) |
| | 229 | lwz r9,4*8+4(r3) |
| | 230 | |
| | 231 | stw r0,0*8+0(r4) |
| | 232 | stw r5,0*8+4(r4) |
| | 233 | stw r0,1*8+0(r4) |
| | 234 | stw r6,1*8+4(r4) |
| | 235 | stw r0,2*8+0(r4) |
| | 236 | stw r7,2*8+4(r4) |
| | 237 | stw r8,3*8+0(r4) |
| | 238 | stw r9,3*8+4(r4) |
| | 239 | |
| | 240 | blr |
| | 241 | |
| | 242 | |
| | 243 | .align 5 |
| | 244 | .globl _munge_wwwwl // 4 'w's and an l |
| | 245 | _munge_wwwwl: |
| | 246 | li r0,0 |
| | 247 | lwz r5,0*8+4(r3) |
| | 248 | lwz r6,1*8+4(r3) |
| | 249 | lwz r7,2*8+4(r3) |
| | 250 | lwz r8,3*8+4(r3) |
| | 251 | lwz r9,4*8+4(r3) |
| | 252 | lwz r10,5*8+4(r3) |
| | 253 | |
| | 254 | stw r0,0*8+0(r4) |
| | 255 | stw r5,0*8+4(r4) |
| | 256 | stw r0,1*8+0(r4) |
| | 257 | stw r6,1*8+4(r4) |
| | 258 | stw r0,2*8+0(r4) |
| | 259 | stw r7,2*8+4(r4) |
| | 260 | stw r0,3*8+0(r4) |
| | 261 | stw r8,3*8+4(r4) |
| | 262 | stw r9,4*8+0(r4) |
| | 263 | stw r10,4*8+4(r4) |
| | 264 | |
| | 265 | blr |
| | 266 | |
| | 267 | |
| | 268 | .align 5 |
| | 269 | .globl _munge_wwwwwl // 5 'w's and an l |
| | 270 | _munge_wwwwwl: |
| | 271 | li r0,0 |
| | 272 | lwz r5,0*8+4(r3) |
| | 273 | lwz r6,1*8+4(r3) |
| | 274 | lwz r7,2*8+4(r3) |
| | 275 | lwz r8,3*8+4(r3) |
| | 276 | lwz r9,4*8+4(r3) |
| | 277 | lwz r10,5*8+4(r3) |
| | 278 | lwz r11,6*8+4(r3) |
| | 279 | |
| | 280 | stw r0,0*8+0(r4) |
| | 281 | stw r5,0*8+4(r4) |
| | 282 | stw r0,1*8+0(r4) |
| | 283 | stw r6,1*8+4(r4) |
| | 284 | stw r0,2*8+0(r4) |
| | 285 | stw r7,2*8+4(r4) |
| | 286 | stw r0,3*8+0(r4) |
| | 287 | stw r8,3*8+4(r4) |
| | 288 | stw r0,4*8+0(r4) |
| | 289 | stw r9,4*8+4(r4) |
| | 290 | stw r10,5*8+0(r4) |
| | 291 | stw r11,5*8+4(r4) |
| | 292 | |
| | 293 | blr |
| | 294 | |
| | 295 | |
| | 296 | .align 5 |
| | 297 | .globl _munge_wsw |
| | 298 | _munge_wsw: |
| | 299 | li r0,0 |
| | 300 | lwz r5,0*8+4(r3) |
| | 301 | lwz r6,1*8+4(r3) |
| | 302 | lwz r7,2*8+4(r3) |
| | 303 | |
| | 304 | stw r0,0*8+0(r4) |
| | 305 | srawi r2,r6,31 |
| | 306 | stw r5,0*8+4(r4) |
| | 307 | stw r2,1*8+0(r4) |
| | 308 | stw r6,1*8+4(r4) |
| | 309 | stw r0,2*8+0(r4) |
| | 310 | stw r7,2*8+4(r4) |
| | 311 | |
| | 312 | blr |
| | 313 | |
| | 314 | |
| | 315 | .align 5 |
| | 316 | .globl _munge_wws |
| | 317 | _munge_wws: |
| | 318 | li r0,0 |
| | 319 | lwz r5,0*8+4(r3) |
| | 320 | lwz r6,1*8+4(r3) |
| | 321 | lwz r7,2*8+4(r3) |
| | 322 | |
| | 323 | stw r0,0*8+0(r4) |
| | 324 | stw r5,0*8+4(r4) |
| | 325 | stw r0,1*8+0(r4) |
| | 326 | srawi r2,r7,31 |
| | 327 | stw r6,1*8+4(r4) |
| | 328 | stw r2,2*8+0(r4) |
| | 329 | stw r7,2*8+4(r4) |
| | 330 | |
| | 331 | blr |
| | 332 | |
| | 333 | |
| | 334 | .align 5 |
| | 335 | .globl _munge_wwwsw |
| | 336 | _munge_wwwsw: |
| | 337 | li r0,0 |
| | 338 | lwz r5,0*8+4(r3) |
| | 339 | lwz r6,1*8+4(r3) |
| | 340 | lwz r7,2*8+4(r3) |
| | 341 | lwz r8,3*8+4(r3) |
| | 342 | lwz r9,4*8+4(r3) |
| | 343 | |
| | 344 | stw r0,0*8+0(r4) |
| | 345 | stw r5,0*8+4(r4) |
| | 346 | stw r0,1*8+0(r4) |
| | 347 | stw r6,1*8+4(r4) |
| | 348 | srawi r2,r8,31 |
| | 349 | stw r0,2*8+0(r4) |
| | 350 | stw r7,2*8+4(r4) |
| | 351 | stw r2,3*8+0(r4) |
| | 352 | stw r8,3*8+4(r4) |
| | 353 | stw r0,4*8+0(r4) |
| | 354 | stw r9,4*8+4(r4) |
| | 355 | |
| | 356 | blr |
projects / apple / xnu.git / blame_incremental