| 1 | /// -*- mode: asm; asm-comment-char: ?/ -*- |
| 2 | /// |
| 3 | /// Common definitions for asesembler source files |
| 4 | /// |
| 5 | /// (c) 2015 Straylight/Edgeware |
| 6 | /// |
| 7 | |
| 8 | ///----- Licensing notice --------------------------------------------------- |
| 9 | /// |
| 10 | /// This file is part of Catacomb. |
| 11 | /// |
| 12 | /// Catacomb is free software; you can redistribute it and/or modify |
| 13 | /// it under the terms of the GNU Library General Public License as |
| 14 | /// published by the Free Software Foundation; either version 2 of the |
| 15 | /// License, or (at your option) any later version. |
| 16 | /// |
| 17 | /// Catacomb is distributed in the hope that it will be useful, |
| 18 | /// but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | /// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | /// GNU Library General Public License for more details. |
| 21 | /// |
| 22 | /// You should have received a copy of the GNU Library General Public |
| 23 | /// License along with Catacomb; if not, write to the Free |
| 24 | /// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | /// MA 02111-1307, USA. |
| 26 | |
| 27 | #ifndef CATACOMB_ASM_COMMON_H |
| 28 | #define CATACOMB_ASM_COMMON_H |
| 29 | |
| 30 | ///-------------------------------------------------------------------------- |
| 31 | /// General definitions. |
| 32 | |
| 33 | // Preprocessor hacks. |
| 34 | #define STRINGY(x) _STRINGY(x, y) |
| 35 | #define _STRINGY(x) #x |
| 36 | #define GLUE(x, y) _GLUE(x, y) |
| 37 | #define _GLUE(x, y) x##y |
| 38 | #define _EMPTY |
| 39 | |
| 40 | // Some useful variables. |
| 41 | .L$_subsec = 0 |
| 42 | |
| 43 | // Literal pools done the hard way. |
| 44 | #define _LIT .text .L$_subsec + 1 |
| 45 | #define _ENDLIT .text .L$_subsec |
| 46 | #define _LTORG .L$_subsec = .L$_subsec + 2; .text .L$_subsec |
| 47 | |
| 48 | // ELF section types. |
| 49 | #if __ELF__ |
| 50 | # if CPUFAM_ARMEL |
| 51 | # define _SECTTY(ty) %ty |
| 52 | # else |
| 53 | # define _SECTTY(ty) @ty |
| 54 | # endif |
| 55 | #endif |
| 56 | |
| 57 | // Section selection. |
| 58 | #define TEXT .text .L$_subsec |
| 59 | #if ABI_WIN |
| 60 | # define RODATA .section .rdata, "dr" |
| 61 | #elif __ELF__ |
| 62 | # define RODATA .section .rodata, "a", _SECTTY(progbits) |
| 63 | #else |
| 64 | # define RODATA TEXT |
| 65 | #endif |
| 66 | #define DATA .data |
| 67 | |
| 68 | // Announcing an internal function. |
| 69 | #define INTFUNC(name) \ |
| 70 | TYPE_FUNC(name); \ |
| 71 | .macro ENDFUNC; _ENDFUNC(name); .endm; \ |
| 72 | .L$_prologue_p = 0; .L$_frameptr_p = 0; \ |
| 73 | FUNC_PREHOOK(name); \ |
| 74 | name: \ |
| 75 | FUNC_POSTHOOK(name) |
| 76 | |
| 77 | // Announcing an external function. |
| 78 | #define FUNC(name) \ |
| 79 | .globl F(name); \ |
| 80 | INTFUNC(F(name)) |
| 81 | |
| 82 | // Marking the end of a function. |
| 83 | #define _ENDFUNC(name) \ |
| 84 | .if ~ .L$_prologue_p; .error "Missing `endprologue'"; .endif; \ |
| 85 | .if .L$_frameptr_p; .purgem dropfp; .endif; \ |
| 86 | .purgem ENDFUNC; \ |
| 87 | SIZE_OBJ(name); \ |
| 88 | ENDFUNC_HOOK(name); \ |
| 89 | _LTORG |
| 90 | |
| 91 | // Make a helper function, if necessary. |
| 92 | #define AUXFN(name) \ |
| 93 | .ifndef .L$_auxfn_def.name; \ |
| 94 | .text 7128; \ |
| 95 | .macro _ENDAUXFN; _ENDAUXFN_TAIL(name); .endm; \ |
| 96 | FUNC_PREHOOK(name); \ |
| 97 | name: |
| 98 | #define _ENDAUXFN_TAIL(name) \ |
| 99 | .purgem _ENDAUXFN; \ |
| 100 | .text .L$_subsec; \ |
| 101 | .L$_auxfn_def.name = 1 |
| 102 | #define ENDAUXFN _ENDAUXFN; .endif |
| 103 | |
| 104 | ///-------------------------------------------------------------------------- |
| 105 | /// ELF-specific hacking. |
| 106 | |
| 107 | #if __ELF__ |
| 108 | |
| 109 | #if __PIC__ || __PIE__ |
| 110 | # define WANT_PIC 1 |
| 111 | #endif |
| 112 | |
| 113 | #define TYPE_FUNC(name) .type name, STT_FUNC |
| 114 | |
| 115 | #define SIZE_OBJ(name) .size name, . - name |
| 116 | |
| 117 | #endif |
| 118 | |
| 119 | ///-------------------------------------------------------------------------- |
| 120 | /// Windows-specific hacking. |
| 121 | |
| 122 | #if ABI_WIN |
| 123 | |
| 124 | #if CPUFAM_X86 |
| 125 | # define F(name) _##name |
| 126 | #endif |
| 127 | |
| 128 | #endif |
| 129 | |
| 130 | ///-------------------------------------------------------------------------- |
| 131 | /// x86- and amd64-specific hacking. |
| 132 | /// |
| 133 | /// It's (slightly) easier to deal with both of these in one go. |
| 134 | |
| 135 | #if CPUFAM_X86 || CPUFAM_AMD64 |
| 136 | |
| 137 | // Word size. |
| 138 | #if CPUFAM_X86 |
| 139 | # define WORDSZ 4 |
| 140 | #endif |
| 141 | #if CPUFAM_AMD64 |
| 142 | # define WORDSZ 8 |
| 143 | #endif |
| 144 | |
| 145 | // Set the function hooks. |
| 146 | #define FUNC_PREHOOK(_) .balign 16 |
| 147 | |
| 148 | // On Windows, arrange to install stack-unwinding data. |
| 149 | #if CPUFAM_AMD64 && ABI_WIN |
| 150 | # define FUNC_POSTHOOK(name) .seh_proc name |
| 151 | # define ENDFUNC_HOOK(_) .seh_endproc |
| 152 | // Procedures are expected to invoke `.seh_setframe' if necessary, and |
| 153 | // `.seh_pushreg' and friends, and `.seh_endprologue'. |
| 154 | #endif |
| 155 | |
| 156 | #if __ELF__ |
| 157 | # define FUNC_POSTHOOK(_) .cfi_startproc |
| 158 | # define ENDFUNC_HOOK(_) .cfi_endproc |
| 159 | #endif |
| 160 | |
| 161 | // Don't use the wretched AT&T syntax. It's festooned with pointless |
| 162 | // punctuation, and all of the data movement is backwards. Ugh! |
| 163 | .intel_syntax noprefix |
| 164 | |
| 165 | // Call external subroutine at ADDR, possibly via PLT. |
| 166 | .macro callext addr |
| 167 | #if WANT_PIC |
| 168 | call \addr@PLT |
| 169 | #else |
| 170 | call \addr |
| 171 | #endif |
| 172 | .endm |
| 173 | |
| 174 | // Do I need to arrange a spare GOT register? |
| 175 | #if WANT_PIC && CPUFAM_X86 |
| 176 | # define NEED_GOT 1 |
| 177 | #endif |
| 178 | #define GOTREG ebx // Not needed in AMD64 so don't care. |
| 179 | |
| 180 | // Maybe load GOT address into GOT. |
| 181 | .macro ldgot got=GOTREG |
| 182 | #if WANT_PIC && CPUFAM_X86 |
| 183 | AUXFN(_ldgot.\got) |
| 184 | mov \got, [esp] |
| 185 | ret |
| 186 | ENDAUXFN |
| 187 | call _ldgot.\got |
| 188 | add \got, offset _GLOBAL_OFFSET_TABLE_ |
| 189 | #endif |
| 190 | .endm |
| 191 | |
| 192 | // Load address of external symbol ADDR into REG, maybe using GOT. |
| 193 | .macro leaext reg, addr, got=GOTREG |
| 194 | #if WANT_PIC |
| 195 | # if CPUFAM_X86 |
| 196 | mov \reg, [\got + \addr@GOT] |
| 197 | # endif |
| 198 | # if CPUFAM_AMD64 |
| 199 | mov \reg, \addr@GOTPCREL[rip] |
| 200 | # endif |
| 201 | #else |
| 202 | # if CPUFAM_X86 |
| 203 | mov \reg, offset \addr |
| 204 | # endif |
| 205 | # if CPUFAM_AMD64 |
| 206 | lea \reg, \addr[rip] |
| 207 | # endif |
| 208 | #endif |
| 209 | .endm |
| 210 | |
| 211 | // Address expression (possibly using a base register, and a displacement) |
| 212 | // referring to ADDR, which is within our module, maybe using GOT. |
| 213 | #define INTADDR(...) INTADDR__0(__VA_ARGS__, GOTREG, dummy) |
| 214 | #define INTADDR__0(addr, got, ...) INTADDR__1(addr, got) |
| 215 | #if CPUFAM_AMD64 |
| 216 | # define INTADDR__1(addr, got) addr + rip |
| 217 | #elif WANT_PIC |
| 218 | # define INTADDR__1(addr, got) got + addr@GOTOFF |
| 219 | #else |
| 220 | # define INTADDR__1(addr, got) addr |
| 221 | #endif |
| 222 | |
| 223 | // Permutations for SIMD instructions. SHUF(A, B, C, D) is an immediate, |
| 224 | // suitable for use in `pshufd' or `shufpd', which copies element A |
| 225 | // (0 <= A < 4) of the source to element 0 of the destination, element B to |
| 226 | // element 1, element C to element 2, and element D to element 3. |
| 227 | #define SHUF(a, b, c, d) ((a) + 4*(b) + 16*(c) + 64*(d)) |
| 228 | |
| 229 | // Map register names to their individual pieces. |
| 230 | |
| 231 | // Apply decoration decor to (internal) register name reg of type ty. |
| 232 | // |
| 233 | // See `R_...' for internal register names. Decorations are as follows. |
| 234 | // |
| 235 | // b low byte (e.g., `al', `r8b') |
| 236 | // h high byte (e.g., `ah') |
| 237 | // w word (e.g., `ax', `r8w') |
| 238 | // d doubleword (e.g., `eax', `r8d') |
| 239 | // q quadword (e.g., `rax', `r8') |
| 240 | // r whole register (doubleword on x86, quadword on amd64) |
| 241 | // |
| 242 | // And types are as follows. |
| 243 | // |
| 244 | // abcd the four traditional registers `a', `b', `c', `d' |
| 245 | // xp the four pointer registers `si', `di', `bp', `sp' |
| 246 | // ip the instruction pointer `ip' |
| 247 | // rn the AMD64 numbered registers `r8'--`r15' |
| 248 | #define _DECOR(ty, decor, reg) _DECOR_##ty##_##decor(reg) |
| 249 | |
| 250 | // Internal macros: _DECOR_ty_decor(reg) applies decoration decor to |
| 251 | // (internal) register name reg of type ty. |
| 252 | |
| 253 | #define _DECOR_abcd_b(reg) reg##l |
| 254 | #define _DECOR_abcd_h(reg) reg##h |
| 255 | #define _DECOR_abcd_w(reg) reg##x |
| 256 | #define _DECOR_abcd_d(reg) e##reg##x |
| 257 | #if CPUFAM_AMD64 |
| 258 | # define _DECOR_abcd_q(reg) r##reg##x |
| 259 | #endif |
| 260 | |
| 261 | #define _DECOR_xp_w(reg) reg |
| 262 | #define _DECOR_xp_d(reg) e##reg |
| 263 | #if CPUFAM_AMD64 |
| 264 | # define _DECOR_xp_b(reg) reg##l |
| 265 | # define _DECOR_xp_q(reg) r##reg |
| 266 | #endif |
| 267 | |
| 268 | #define _DECOR_ip_w(reg) reg |
| 269 | #define _DECOR_ip_d(reg) e##reg |
| 270 | #if CPUFAM_AMD64 |
| 271 | # define _DECOR_ip_q(reg) r##reg |
| 272 | #endif |
| 273 | |
| 274 | #if CPUFAM_AMD64 |
| 275 | # define _DECOR_rn_b(reg) reg##b |
| 276 | # define _DECOR_rn_w(reg) reg##w |
| 277 | # define _DECOR_rn_d(reg) reg##d |
| 278 | # define _DECOR_rn_q(reg) reg |
| 279 | # define _DECOR_rn_r(reg) reg |
| 280 | #endif |
| 281 | |
| 282 | #define _DECOR_mem_b(addr) byte ptr addr |
| 283 | #define _DECOR_mem_w(addr) word ptr addr |
| 284 | #define _DECOR_mem_d(addr) dword ptr addr |
| 285 | #if CPUFAM_AMD64 |
| 286 | # define _DECOR_mem_q(addr) qword ptr addr |
| 287 | #endif |
| 288 | |
| 289 | #define _DECOR_imm_b(imm) byte imm |
| 290 | #define _DECOR_imm_w(imm) word imm |
| 291 | #define _DECOR_imm_d(imm) dword imm |
| 292 | #if CPUFAM_AMD64 |
| 293 | # define _DECOR_imm_q(imm) qword imm |
| 294 | #endif |
| 295 | |
| 296 | #if CPUFAM_X86 |
| 297 | # define _DECOR_abcd_r(reg) e##reg##x |
| 298 | # define _DECOR_xp_r(reg) e##reg |
| 299 | # define _DECOR_ip_r(reg) e##reg |
| 300 | # define _DECOR_mem_r(addr) dword ptr addr |
| 301 | # define _DECOR_imm_r(imm) dword imm |
| 302 | #endif |
| 303 | #if CPUFAM_AMD64 |
| 304 | # define _DECOR_abcd_r(reg) r##reg##x |
| 305 | # define _DECOR_xp_r(reg) r##reg |
| 306 | # define _DECOR_ip_r(reg) r##reg |
| 307 | # define _DECOR_mem_r(addr) qword ptr addr |
| 308 | # define _DECOR_imm_r(imm) qword imm |
| 309 | #endif |
| 310 | |
| 311 | // R_r(decor) applies decoration decor to register r, which is an internal |
| 312 | // register name. The internal register names are: `ip', `a', `b', `c', `d', |
| 313 | // `si', `di', `bp', `sp', `r8'--`r15'. |
| 314 | #define R_ip(decor) _DECOR(ip, decor, ip) |
| 315 | #define R_a(decor) _DECOR(abcd, decor, a) |
| 316 | #define R_b(decor) _DECOR(abcd, decor, b) |
| 317 | #define R_c(decor) _DECOR(abcd, decor, c) |
| 318 | #define R_d(decor) _DECOR(abcd, decor, d) |
| 319 | #define R_si(decor) _DECOR(xp, decor, si) |
| 320 | #define R_di(decor) _DECOR(xp, decor, di) |
| 321 | #define R_bp(decor) _DECOR(xp, decor, bp) |
| 322 | #define R_sp(decor) _DECOR(xp, decor, sp) |
| 323 | #if CPUFAM_AMD64 |
| 324 | # define R_r8(decor) _DECOR(rn, decor, r8) |
| 325 | # define R_r9(decor) _DECOR(rn, decor, r9) |
| 326 | # define R_r10(decor) _DECOR(rn, decor, r10) |
| 327 | # define R_r11(decor) _DECOR(rn, decor, r11) |
| 328 | # define R_r12(decor) _DECOR(rn, decor, r12) |
| 329 | # define R_r13(decor) _DECOR(rn, decor, r13) |
| 330 | # define R_r14(decor) _DECOR(rn, decor, r14) |
| 331 | # define R_r15(decor) _DECOR(rn, decor, r15) |
| 332 | #endif |
| 333 | |
| 334 | // Refer to an in-memory datum of the type implied by decor residing at |
| 335 | // address addr (which should supply its own square-brackets). |
| 336 | #define MEM(decor, addr) _DECOR(mem, decor, addr) |
| 337 | |
| 338 | // Refer to an immediate datum of the type implied by decor. |
| 339 | #define IMM(decor, imm) _DECOR(mem, decor, imm) |
| 340 | |
| 341 | // Applies decoration decor to assembler-level register name reg. |
| 342 | #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor) |
| 343 | |
| 344 | // Internal macros: _REGFORM_r(decor) applies decoration decor to an |
| 345 | // assembler-level register name, in place of any decoration that register |
| 346 | // name has already. |
| 347 | |
| 348 | #define _REGFORM_ip(decor) R_ip(decor) |
| 349 | #define _REGFORM_eip(decor) R_ip(decor) |
| 350 | |
| 351 | #define _REGFORM_a(decor) R_a(decor) |
| 352 | #define _REGFORM_al(decor) R_a(decor) |
| 353 | #define _REGFORM_ah(decor) R_a(decor) |
| 354 | #define _REGFORM_ax(decor) R_a(decor) |
| 355 | #define _REGFORM_eax(decor) R_a(decor) |
| 356 | |
| 357 | #define _REGFORM_b(decor) R_b(decor) |
| 358 | #define _REGFORM_bl(decor) R_b(decor) |
| 359 | #define _REGFORM_bh(decor) R_b(decor) |
| 360 | #define _REGFORM_bx(decor) R_b(decor) |
| 361 | #define _REGFORM_ebx(decor) R_b(decor) |
| 362 | |
| 363 | #define _REGFORM_c(decor) R_c(decor) |
| 364 | #define _REGFORM_cl(decor) R_c(decor) |
| 365 | #define _REGFORM_ch(decor) R_c(decor) |
| 366 | #define _REGFORM_cx(decor) R_c(decor) |
| 367 | #define _REGFORM_ecx(decor) R_c(decor) |
| 368 | |
| 369 | #define _REGFORM_d(decor) R_d(decor) |
| 370 | #define _REGFORM_dl(decor) R_d(decor) |
| 371 | #define _REGFORM_dh(decor) R_d(decor) |
| 372 | #define _REGFORM_dx(decor) R_d(decor) |
| 373 | #define _REGFORM_edx(decor) R_d(decor) |
| 374 | |
| 375 | #define _REGFORM_si(decor) R_si(decor) |
| 376 | #define _REGFORM_sil(decor) R_si(decor) |
| 377 | #define _REGFORM_esi(decor) R_si(decor) |
| 378 | |
| 379 | #define _REGFORM_di(decor) R_di(decor) |
| 380 | #define _REGFORM_dil(decor) R_di(decor) |
| 381 | #define _REGFORM_edi(decor) R_di(decor) |
| 382 | |
| 383 | #define _REGFORM_bp(decor) R_bp(decor) |
| 384 | #define _REGFORM_bpl(decor) R_bp(decor) |
| 385 | #define _REGFORM_ebp(decor) R_bp(decor) |
| 386 | |
| 387 | #define _REGFORM_sp(decor) R_sp(decor) |
| 388 | #define _REGFORM_spl(decor) R_sp(decor) |
| 389 | #define _REGFORM_esp(decor) R_sp(decor) |
| 390 | |
| 391 | #if CPUFAM_AMD64 |
| 392 | |
| 393 | # define _REGFORM_rip(decor) R_ip(decor) |
| 394 | # define _REGFORM_rsp(decor) R_sp(decor) |
| 395 | # define _REGFORM_rbp(decor) R_bp(decor) |
| 396 | # define _REGFORM_rdi(decor) R_di(decor) |
| 397 | # define _REGFORM_rsi(decor) R_si(decor) |
| 398 | # define _REGFORM_rdx(decor) R_d(decor) |
| 399 | # define _REGFORM_rcx(decor) R_c(decor) |
| 400 | # define _REGFORM_rbx(decor) R_b(decor) |
| 401 | # define _REGFORM_rax(decor) R_a(decor) |
| 402 | |
| 403 | # define _REGFORM_r8(decor) R_r8(decor) |
| 404 | # define _REGFORM_r8b(decor) R_r8(decor) |
| 405 | # define _REGFORM_r8w(decor) R_r8(decor) |
| 406 | # define _REGFORM_r8d(decor) R_r8(decor) |
| 407 | |
| 408 | # define _REGFORM_r9(decor) R_r9(decor) |
| 409 | # define _REGFORM_r9b(decor) R_r9(decor) |
| 410 | # define _REGFORM_r9w(decor) R_r9(decor) |
| 411 | # define _REGFORM_r9d(decor) R_r9(decor) |
| 412 | |
| 413 | # define _REGFORM_r10(decor) R_r10(decor) |
| 414 | # define _REGFORM_r10b(decor) R_r10(decor) |
| 415 | # define _REGFORM_r10w(decor) R_r10(decor) |
| 416 | # define _REGFORM_r10d(decor) R_r10(decor) |
| 417 | |
| 418 | # define _REGFORM_r11(decor) R_r11(decor) |
| 419 | # define _REGFORM_r11b(decor) R_r11(decor) |
| 420 | # define _REGFORM_r11w(decor) R_r11(decor) |
| 421 | # define _REGFORM_r11d(decor) R_r11(decor) |
| 422 | |
| 423 | # define _REGFORM_r12(decor) R_r12(decor) |
| 424 | # define _REGFORM_r12b(decor) R_r12(decor) |
| 425 | # define _REGFORM_r12w(decor) R_r12(decor) |
| 426 | # define _REGFORM_r12d(decor) R_r12(decor) |
| 427 | |
| 428 | # define _REGFORM_r13(decor) R_r13(decor) |
| 429 | # define _REGFORM_r13b(decor) R_r13(decor) |
| 430 | # define _REGFORM_r13w(decor) R_r13(decor) |
| 431 | # define _REGFORM_r13d(decor) R_r13(decor) |
| 432 | |
| 433 | # define _REGFORM_r14(decor) R_r14(decor) |
| 434 | # define _REGFORM_r14b(decor) R_r14(decor) |
| 435 | # define _REGFORM_r14w(decor) R_r14(decor) |
| 436 | # define _REGFORM_r14d(decor) R_r14(decor) |
| 437 | |
| 438 | # define _REGFORM_r15(decor) R_r15(decor) |
| 439 | # define _REGFORM_r15b(decor) R_r15(decor) |
| 440 | # define _REGFORM_r15w(decor) R_r15(decor) |
| 441 | # define _REGFORM_r15d(decor) R_r15(decor) |
| 442 | |
| 443 | #endif |
| 444 | |
| 445 | // Macros for converting register names. |
| 446 | #define BYTE(reg) _REGFORM(reg, b) |
| 447 | #define HIBYTE(reg) _REGFORM(reg, h) |
| 448 | #define WORD(reg) _REGFORM(reg, w) |
| 449 | #define DWORD(reg) _REGFORM(reg, d) |
| 450 | #if CPUFAM_AMD64 |
| 451 | # define QWORD(reg) _REGFORM(reg, q) |
| 452 | #endif |
| 453 | #define WHOLE(reg) _REGFORM(reg, r) |
| 454 | |
| 455 | // Stack management and unwinding. |
| 456 | .macro setfp fp=R_bp(r), offset=0 |
| 457 | .if \offset == 0 |
| 458 | mov \fp, R_sp(r) |
| 459 | #if __ELF__ |
| 460 | .cfi_def_cfa_register \fp |
| 461 | #endif |
| 462 | #if ABI_WIN && CPUFAM_AMD64 |
| 463 | .seh_setframe \fp, 0 |
| 464 | #endif |
| 465 | .else |
| 466 | lea \fp, [R_sp(r) + \offset] |
| 467 | #if __ELF__ |
| 468 | .cfi_def_cfa_register \fp |
| 469 | .cfi_adjust_cfa_offset -\offset |
| 470 | #endif |
| 471 | #if ABI_WIN && CPUFAM_AMD64 |
| 472 | .seh_setframe \fp, \offset |
| 473 | #endif |
| 474 | .endif |
| 475 | .L$_frameptr_p = -1 |
| 476 | .macro dropfp; _dropfp \fp, \offset; .endm |
| 477 | .endm |
| 478 | |
| 479 | .macro _dropfp fp, offset=0 |
| 480 | .if \offset == 0 |
| 481 | mov R_sp(r), \fp |
| 482 | #if __ELF__ |
| 483 | .cfi_def_cfa_register R_sp(r) |
| 484 | #endif |
| 485 | .else |
| 486 | lea R_sp(r), [\fp - \offset] |
| 487 | #if __ELF__ |
| 488 | .cfi_def_cfa_register R_sp(r) |
| 489 | .cfi_adjust_cfa_offset +\offset |
| 490 | #endif |
| 491 | .endif |
| 492 | .L$_frameptr_p = 0 |
| 493 | .purgem dropfp |
| 494 | .endm |
| 495 | |
| 496 | .macro stalloc n |
| 497 | sub R_sp(r), \n |
| 498 | #if __ELF__ |
| 499 | .cfi_adjust_cfa_offset +\n |
| 500 | #endif |
| 501 | #if ABI_WIN && CPUFAM_AMD64 |
| 502 | .seh_stackalloc \n |
| 503 | #endif |
| 504 | .endm |
| 505 | |
| 506 | .macro stfree n |
| 507 | add R_sp(r), \n |
| 508 | #if __ELF__ |
| 509 | .cfi_adjust_cfa_offset -\n |
| 510 | #endif |
| 511 | .endm |
| 512 | |
| 513 | .macro pushreg r |
| 514 | push \r |
| 515 | #if __ELF__ |
| 516 | .cfi_adjust_cfa_offset +WORDSZ |
| 517 | .cfi_rel_offset \r, 0 |
| 518 | #endif |
| 519 | #if ABI_WIN && CPUFAM_AMD64 |
| 520 | .seh_pushreg \r |
| 521 | #endif |
| 522 | .endm |
| 523 | |
| 524 | .macro popreg r |
| 525 | pop \r |
| 526 | #if __ELF__ |
| 527 | .cfi_adjust_cfa_offset -WORDSZ |
| 528 | .cfi_restore \r |
| 529 | #endif |
| 530 | .endm |
| 531 | |
| 532 | .macro savexmm r, offset |
| 533 | movdqa [R_sp(r) + \offset], \r |
| 534 | #if ABI_WIN && CPUFAM_AMD64 |
| 535 | .seh_savexmm \r, \offset |
| 536 | #endif |
| 537 | .endm |
| 538 | |
| 539 | .macro rstrxmm r, offset |
| 540 | movdqa \r, [R_sp(r) + \offset] |
| 541 | .endm |
| 542 | |
| 543 | .macro endprologue |
| 544 | #if ABI_WIN && CPUFAM_AMD64 |
| 545 | .seh_endprologue |
| 546 | #endif |
| 547 | .L$_prologue_p = -1 |
| 548 | .endm |
| 549 | |
| 550 | #endif |
| 551 | |
| 552 | ///-------------------------------------------------------------------------- |
| 553 | /// ARM-specific hacking. |
| 554 | |
| 555 | #if CPUFAM_ARMEL |
| 556 | |
| 557 | // ARM/Thumb mode things. Use ARM by default. |
| 558 | #define ARM .arm; .L$_pcoff = 8 |
| 559 | #define THUMB .thumb; .L$_pcoff = 4 |
| 560 | ARM |
| 561 | |
| 562 | // Set the function hooks. |
| 563 | #define FUNC_PREHOOK(_) .balign 4; .fnstart |
| 564 | #define ENDFUNC_HOOK(_) .fnend; .ltorg |
| 565 | |
| 566 | // Call external subroutine at ADDR, possibly via PLT. |
| 567 | .macro callext addr, cond= |
| 568 | #if WANT_PIC |
| 569 | bl\cond \addr(PLT) |
| 570 | #else |
| 571 | bl\cond \addr |
| 572 | #endif |
| 573 | .endm |
| 574 | |
| 575 | // Do I need to arrange a spare GOT register? |
| 576 | #if WANT_PIC |
| 577 | # define NEED_GOT 1 |
| 578 | #endif |
| 579 | #define GOTREG r9 |
| 580 | |
| 581 | // Maybe load GOT address into GOT. |
| 582 | .macro ldgot cond=, got=GOTREG |
| 583 | #if WANT_PIC |
| 584 | ldr\cond \got, .L$_ldgot$\@ |
| 585 | .L$_ldgot_pc$\@: |
| 586 | add\cond \got, pc, \got |
| 587 | _LIT |
| 588 | .balign 4 |
| 589 | .L$_ldgot$\@: |
| 590 | .word _GLOBAL_OFFSET_TABLE_ - .L$_ldgot_pc$\@ - .L$_pcoff |
| 591 | _ENDLIT |
| 592 | #endif |
| 593 | .endm |
| 594 | |
| 595 | // Load address of external symbol ADDR into REG, maybe using GOT. |
| 596 | .macro leaext reg, addr, cond=, got=GOTREG |
| 597 | #if WANT_PIC |
| 598 | ldr\cond \reg, .L$_leaext$\@ |
| 599 | ldr\cond \reg, [\got, \reg] |
| 600 | _LIT |
| 601 | .balign 4 |
| 602 | .L$_leaext$\@: |
| 603 | .word \addr(GOT) |
| 604 | _ENDLIT |
| 605 | #else |
| 606 | ldr\cond \reg, =\addr |
| 607 | #endif |
| 608 | .endm |
| 609 | |
| 610 | // Load address of external symbol ADDR into REG directly. |
| 611 | .macro leaextq reg, addr, cond= |
| 612 | #if WANT_PIC |
| 613 | ldr\cond \reg, .L$_leaextq$\@ |
| 614 | .L$_leaextq_pc$\@: |
| 615 | .if .L$_pcoff == 8 |
| 616 | ldr\cond \reg, [pc, \reg] |
| 617 | .else |
| 618 | add\cond \reg, pc |
| 619 | ldr\cond \reg, [\reg] |
| 620 | .endif |
| 621 | _LIT |
| 622 | .balign 4 |
| 623 | .L$_leaextq$\@: |
| 624 | .word \addr(GOT_PREL) + (. - .L$_leaextq_pc$\@ - .L$_pcoff) |
| 625 | _ENDLIT |
| 626 | #else |
| 627 | ldr\cond \reg, =\addr |
| 628 | #endif |
| 629 | .endm |
| 630 | |
| 631 | .macro vzero vz=q15 |
| 632 | // Set VZ (default q15) to zero. |
| 633 | vmov.u32 \vz, #0 |
| 634 | .endm |
| 635 | |
| 636 | .macro vshl128 vd, vn, nbit, vz=q15 |
| 637 | // Set VD to VN shifted left by NBIT. Assume VZ (default q15) is |
| 638 | // all-bits-zero. NBIT must be a multiple of 8. |
| 639 | .if \nbit&3 != 0 |
| 640 | .error "shift quantity must be whole number of bytes" |
| 641 | .endif |
| 642 | vext.8 \vd, \vz, \vn, #16 - (\nbit >> 3) |
| 643 | .endm |
| 644 | |
| 645 | .macro vshr128 vd, vn, nbit, vz=q15 |
| 646 | // Set VD to VN shifted right by NBIT. Assume VZ (default q15) is |
| 647 | // all-bits-zero. NBIT must be a multiple of 8. |
| 648 | .if \nbit&3 != 0 |
| 649 | .error "shift quantity must be whole number of bytes" |
| 650 | .endif |
| 651 | vext.8 \vd, \vn, \vz, #\nbit >> 3 |
| 652 | .endm |
| 653 | |
| 654 | // Apply decoration decor to register name reg. |
| 655 | #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor) |
| 656 | |
| 657 | // Internal macros: `_REGFORM_r(decor)' applies decoration decor to register |
| 658 | // name r. |
| 659 | |
| 660 | #define _REGFORM_s0(decor) _DECOR(s, decor, 0) |
| 661 | #define _REGFORM_s1(decor) _DECOR(s, decor, 1) |
| 662 | #define _REGFORM_s2(decor) _DECOR(s, decor, 2) |
| 663 | #define _REGFORM_s3(decor) _DECOR(s, decor, 3) |
| 664 | #define _REGFORM_s4(decor) _DECOR(s, decor, 4) |
| 665 | #define _REGFORM_s5(decor) _DECOR(s, decor, 5) |
| 666 | #define _REGFORM_s6(decor) _DECOR(s, decor, 6) |
| 667 | #define _REGFORM_s7(decor) _DECOR(s, decor, 7) |
| 668 | #define _REGFORM_s8(decor) _DECOR(s, decor, 8) |
| 669 | #define _REGFORM_s9(decor) _DECOR(s, decor, 9) |
| 670 | #define _REGFORM_s10(decor) _DECOR(s, decor, 10) |
| 671 | #define _REGFORM_s11(decor) _DECOR(s, decor, 11) |
| 672 | #define _REGFORM_s12(decor) _DECOR(s, decor, 12) |
| 673 | #define _REGFORM_s13(decor) _DECOR(s, decor, 13) |
| 674 | #define _REGFORM_s14(decor) _DECOR(s, decor, 14) |
| 675 | #define _REGFORM_s15(decor) _DECOR(s, decor, 15) |
| 676 | #define _REGFORM_s16(decor) _DECOR(s, decor, 16) |
| 677 | #define _REGFORM_s17(decor) _DECOR(s, decor, 17) |
| 678 | #define _REGFORM_s18(decor) _DECOR(s, decor, 18) |
| 679 | #define _REGFORM_s19(decor) _DECOR(s, decor, 19) |
| 680 | #define _REGFORM_s20(decor) _DECOR(s, decor, 20) |
| 681 | #define _REGFORM_s21(decor) _DECOR(s, decor, 21) |
| 682 | #define _REGFORM_s22(decor) _DECOR(s, decor, 22) |
| 683 | #define _REGFORM_s23(decor) _DECOR(s, decor, 23) |
| 684 | #define _REGFORM_s24(decor) _DECOR(s, decor, 24) |
| 685 | #define _REGFORM_s25(decor) _DECOR(s, decor, 25) |
| 686 | #define _REGFORM_s26(decor) _DECOR(s, decor, 26) |
| 687 | #define _REGFORM_s27(decor) _DECOR(s, decor, 27) |
| 688 | #define _REGFORM_s28(decor) _DECOR(s, decor, 28) |
| 689 | #define _REGFORM_s29(decor) _DECOR(s, decor, 29) |
| 690 | #define _REGFORM_s30(decor) _DECOR(s, decor, 30) |
| 691 | #define _REGFORM_s31(decor) _DECOR(s, decor, 31) |
| 692 | |
| 693 | #define _REGFORM_d0(decor) _DECOR(d, decor, 0) |
| 694 | #define _REGFORM_d1(decor) _DECOR(d, decor, 1) |
| 695 | #define _REGFORM_d2(decor) _DECOR(d, decor, 2) |
| 696 | #define _REGFORM_d3(decor) _DECOR(d, decor, 3) |
| 697 | #define _REGFORM_d4(decor) _DECOR(d, decor, 4) |
| 698 | #define _REGFORM_d5(decor) _DECOR(d, decor, 5) |
| 699 | #define _REGFORM_d6(decor) _DECOR(d, decor, 6) |
| 700 | #define _REGFORM_d7(decor) _DECOR(d, decor, 7) |
| 701 | #define _REGFORM_d8(decor) _DECOR(d, decor, 8) |
| 702 | #define _REGFORM_d9(decor) _DECOR(d, decor, 9) |
| 703 | #define _REGFORM_d10(decor) _DECOR(d, decor, 10) |
| 704 | #define _REGFORM_d11(decor) _DECOR(d, decor, 11) |
| 705 | #define _REGFORM_d12(decor) _DECOR(d, decor, 12) |
| 706 | #define _REGFORM_d13(decor) _DECOR(d, decor, 13) |
| 707 | #define _REGFORM_d14(decor) _DECOR(d, decor, 14) |
| 708 | #define _REGFORM_d15(decor) _DECOR(d, decor, 15) |
| 709 | #define _REGFORM_d16(decor) _DECOR(d, decor, 16) |
| 710 | #define _REGFORM_d17(decor) _DECOR(d, decor, 17) |
| 711 | #define _REGFORM_d18(decor) _DECOR(d, decor, 18) |
| 712 | #define _REGFORM_d19(decor) _DECOR(d, decor, 19) |
| 713 | #define _REGFORM_d20(decor) _DECOR(d, decor, 20) |
| 714 | #define _REGFORM_d21(decor) _DECOR(d, decor, 21) |
| 715 | #define _REGFORM_d22(decor) _DECOR(d, decor, 22) |
| 716 | #define _REGFORM_d23(decor) _DECOR(d, decor, 23) |
| 717 | #define _REGFORM_d24(decor) _DECOR(d, decor, 24) |
| 718 | #define _REGFORM_d25(decor) _DECOR(d, decor, 25) |
| 719 | #define _REGFORM_d26(decor) _DECOR(d, decor, 26) |
| 720 | #define _REGFORM_d27(decor) _DECOR(d, decor, 27) |
| 721 | #define _REGFORM_d28(decor) _DECOR(d, decor, 28) |
| 722 | #define _REGFORM_d29(decor) _DECOR(d, decor, 29) |
| 723 | #define _REGFORM_d30(decor) _DECOR(d, decor, 30) |
| 724 | #define _REGFORM_d31(decor) _DECOR(d, decor, 31) |
| 725 | |
| 726 | #define _REGFORM_q0(decor) _DECOR(q, decor, 0) |
| 727 | #define _REGFORM_q1(decor) _DECOR(q, decor, 1) |
| 728 | #define _REGFORM_q2(decor) _DECOR(q, decor, 2) |
| 729 | #define _REGFORM_q3(decor) _DECOR(q, decor, 3) |
| 730 | #define _REGFORM_q4(decor) _DECOR(q, decor, 4) |
| 731 | #define _REGFORM_q5(decor) _DECOR(q, decor, 5) |
| 732 | #define _REGFORM_q6(decor) _DECOR(q, decor, 6) |
| 733 | #define _REGFORM_q7(decor) _DECOR(q, decor, 7) |
| 734 | #define _REGFORM_q8(decor) _DECOR(q, decor, 8) |
| 735 | #define _REGFORM_q9(decor) _DECOR(q, decor, 9) |
| 736 | #define _REGFORM_q10(decor) _DECOR(q, decor, 10) |
| 737 | #define _REGFORM_q11(decor) _DECOR(q, decor, 11) |
| 738 | #define _REGFORM_q12(decor) _DECOR(q, decor, 12) |
| 739 | #define _REGFORM_q13(decor) _DECOR(q, decor, 13) |
| 740 | #define _REGFORM_q14(decor) _DECOR(q, decor, 14) |
| 741 | #define _REGFORM_q15(decor) _DECOR(q, decor, 15) |
| 742 | |
| 743 | // `_LOPART(n)' and `_HIPART(n)' return the numbers of the register halves of |
| 744 | // register n, i.e., 2*n and 2*n + 1 respectively. |
| 745 | #define _LOPART(n) _GLUE(_LOPART_, n) |
| 746 | #define _HIPART(n) _GLUE(_HIPART_, n) |
| 747 | |
| 748 | // Internal macros: `_LOPART_n' and `_HIPART_n' return the numbers of the |
| 749 | // register halves of register n, i.e., 2*n and 2*n + 1 respectively. |
| 750 | |
| 751 | #define _LOPART_0 0 |
| 752 | #define _HIPART_0 1 |
| 753 | #define _LOPART_1 2 |
| 754 | #define _HIPART_1 3 |
| 755 | #define _LOPART_2 4 |
| 756 | #define _HIPART_2 5 |
| 757 | #define _LOPART_3 6 |
| 758 | #define _HIPART_3 7 |
| 759 | #define _LOPART_4 8 |
| 760 | #define _HIPART_4 9 |
| 761 | #define _LOPART_5 10 |
| 762 | #define _HIPART_5 11 |
| 763 | #define _LOPART_6 12 |
| 764 | #define _HIPART_6 13 |
| 765 | #define _LOPART_7 14 |
| 766 | #define _HIPART_7 15 |
| 767 | #define _LOPART_8 16 |
| 768 | #define _HIPART_8 17 |
| 769 | #define _LOPART_9 18 |
| 770 | #define _HIPART_9 19 |
| 771 | #define _LOPART_10 20 |
| 772 | #define _HIPART_10 21 |
| 773 | #define _LOPART_11 22 |
| 774 | #define _HIPART_11 23 |
| 775 | #define _LOPART_12 24 |
| 776 | #define _HIPART_12 25 |
| 777 | #define _LOPART_13 26 |
| 778 | #define _HIPART_13 27 |
| 779 | #define _LOPART_14 28 |
| 780 | #define _HIPART_14 29 |
| 781 | #define _LOPART_15 30 |
| 782 | #define _HIPART_15 31 |
| 783 | |
| 784 | // Return the register number of the pair containing register n, i.e., |
| 785 | // floor(n/2). |
| 786 | #define _PAIR(n) _GLUE(_PAIR_, n) |
| 787 | |
| 788 | // Internal macros: `_PAIR_n' returns the register number of the pair |
| 789 | // containing register n, i.e., floor(n/2). |
| 790 | #define _PAIR_0 0 |
| 791 | #define _PAIR_1 0 |
| 792 | #define _PAIR_2 1 |
| 793 | #define _PAIR_3 1 |
| 794 | #define _PAIR_4 2 |
| 795 | #define _PAIR_5 2 |
| 796 | #define _PAIR_6 3 |
| 797 | #define _PAIR_7 3 |
| 798 | #define _PAIR_8 4 |
| 799 | #define _PAIR_9 4 |
| 800 | #define _PAIR_10 5 |
| 801 | #define _PAIR_11 5 |
| 802 | #define _PAIR_12 6 |
| 803 | #define _PAIR_13 6 |
| 804 | #define _PAIR_14 7 |
| 805 | #define _PAIR_15 7 |
| 806 | #define _PAIR_16 8 |
| 807 | #define _PAIR_17 8 |
| 808 | #define _PAIR_18 9 |
| 809 | #define _PAIR_19 9 |
| 810 | #define _PAIR_20 10 |
| 811 | #define _PAIR_21 10 |
| 812 | #define _PAIR_22 11 |
| 813 | #define _PAIR_23 11 |
| 814 | #define _PAIR_24 12 |
| 815 | #define _PAIR_25 12 |
| 816 | #define _PAIR_26 13 |
| 817 | #define _PAIR_27 13 |
| 818 | #define _PAIR_28 14 |
| 819 | #define _PAIR_29 14 |
| 820 | #define _PAIR_30 15 |
| 821 | #define _PAIR_31 15 |
| 822 | |
| 823 | // Apply decoration decor to register number n of type ty. Decorations are |
| 824 | // as follows. |
| 825 | // |
| 826 | // decor types meaning |
| 827 | // Q s, d the NEON qN register containing this one |
| 828 | // D s the NEON dN register containing this one |
| 829 | // D0 q the low 64-bit half of this one |
| 830 | // D1 q the high 64-bit half of this one |
| 831 | // S0 d, q the first 32-bit piece of this one |
| 832 | // S1 d, q the second 32-bit piece of this one |
| 833 | // S2 q the third 32-bit piece of this one |
| 834 | // S3 q the fourth 32-bit piece of this one |
| 835 | // Bn q the nth byte of this register, as a scalar |
| 836 | // Hn q the nth halfword of this register, as a scalar |
| 837 | // Wn q the nth word of this register, as a scalar |
| 838 | #define _DECOR(ty, decor, n) _DECOR_##ty##_##decor(n) |
| 839 | |
| 840 | // Internal macros: `_DECOR_ty_decor(n)' applies decoration decor to register |
| 841 | // number n of type ty. |
| 842 | |
| 843 | #define _DECOR_s_Q(n) GLUE(q, _PAIR(_PAIR(n))) |
| 844 | #define _DECOR_s_D(n) GLUE(d, _PAIR(n)) |
| 845 | |
| 846 | #define _DECOR_d_Q(n) GLUE(q, _PAIR(n)) |
| 847 | #define _DECOR_d_S0(n) GLUE(s, _LOPART(n)) |
| 848 | #define _DECOR_d_S1(n) GLUE(s, _LOPART(n)) |
| 849 | |
| 850 | #define _DECOR_q_D0(n) GLUE(d, _LOPART(n)) |
| 851 | #define _DECOR_q_D1(n) GLUE(d, _HIPART(n)) |
| 852 | #define _DECOR_q_S0(n) GLUE(s, _LOPART(_LOPART(n))) |
| 853 | #define _DECOR_q_S1(n) GLUE(s, _HIPART(_LOPART(n))) |
| 854 | #define _DECOR_q_S2(n) GLUE(s, _LOPART(_HIPART(n))) |
| 855 | #define _DECOR_q_S3(n) GLUE(s, _HIPART(_HIPART(n))) |
| 856 | #define _DECOR_q_W0(n) GLUE(d, _LOPART(n))[0] |
| 857 | #define _DECOR_q_W1(n) GLUE(d, _LOPART(n))[1] |
| 858 | #define _DECOR_q_W2(n) GLUE(d, _HIPART(n))[0] |
| 859 | #define _DECOR_q_W3(n) GLUE(d, _HIPART(n))[1] |
| 860 | #define _DECOR_q_H0(n) GLUE(d, _LOPART(n))[0] |
| 861 | #define _DECOR_q_H1(n) GLUE(d, _LOPART(n))[1] |
| 862 | #define _DECOR_q_H2(n) GLUE(d, _LOPART(n))[2] |
| 863 | #define _DECOR_q_H3(n) GLUE(d, _LOPART(n))[3] |
| 864 | #define _DECOR_q_H4(n) GLUE(d, _HIPART(n))[0] |
| 865 | #define _DECOR_q_H5(n) GLUE(d, _HIPART(n))[1] |
| 866 | #define _DECOR_q_H6(n) GLUE(d, _HIPART(n))[2] |
| 867 | #define _DECOR_q_H7(n) GLUE(d, _HIPART(n))[3] |
| 868 | #define _DECOR_q_B0(n) GLUE(d, _LOPART(n))[0] |
| 869 | #define _DECOR_q_B1(n) GLUE(d, _LOPART(n))[1] |
| 870 | #define _DECOR_q_B2(n) GLUE(d, _LOPART(n))[2] |
| 871 | #define _DECOR_q_B3(n) GLUE(d, _LOPART(n))[3] |
| 872 | #define _DECOR_q_B4(n) GLUE(d, _LOPART(n))[4] |
| 873 | #define _DECOR_q_B5(n) GLUE(d, _LOPART(n))[5] |
| 874 | #define _DECOR_q_B6(n) GLUE(d, _LOPART(n))[6] |
| 875 | #define _DECOR_q_B7(n) GLUE(d, _LOPART(n))[7] |
| 876 | #define _DECOR_q_B8(n) GLUE(d, _HIPART(n))[0] |
| 877 | #define _DECOR_q_B9(n) GLUE(d, _HIPART(n))[1] |
| 878 | #define _DECOR_q_B10(n) GLUE(d, _HIPART(n))[2] |
| 879 | #define _DECOR_q_B11(n) GLUE(d, _HIPART(n))[3] |
| 880 | #define _DECOR_q_B12(n) GLUE(d, _HIPART(n))[4] |
| 881 | #define _DECOR_q_B13(n) GLUE(d, _HIPART(n))[5] |
| 882 | #define _DECOR_q_B14(n) GLUE(d, _HIPART(n))[6] |
| 883 | #define _DECOR_q_B15(n) GLUE(d, _HIPART(n))[7] |
| 884 | |
| 885 | // Macros for navigating the NEON register hierarchy. |
| 886 | #define S0(reg) _REGFORM(reg, S0) |
| 887 | #define S1(reg) _REGFORM(reg, S1) |
| 888 | #define S2(reg) _REGFORM(reg, S2) |
| 889 | #define S3(reg) _REGFORM(reg, S3) |
| 890 | #define D(reg) _REGFORM(reg, D) |
| 891 | #define D0(reg) _REGFORM(reg, D0) |
| 892 | #define D1(reg) _REGFORM(reg, D1) |
| 893 | #define Q(reg) _REGFORM(reg, Q) |
| 894 | |
| 895 | // Macros for indexing quadword registers. |
| 896 | #define QB(reg, i) _REGFORM(reg, B##i) |
| 897 | #define QH(reg, i) _REGFORM(reg, H##i) |
| 898 | #define QW(reg, i) _REGFORM(reg, W##i) |
| 899 | |
| 900 | // Macros for converting vldm/vstm ranges. |
| 901 | #define QQ(qlo, qhi) D0(qlo)-D1(qhi) |
| 902 | |
| 903 | // Stack management and unwinding. |
| 904 | .macro setfp fp=r11, offset=0 |
| 905 | .if \offset == 0 |
| 906 | mov \fp, sp |
| 907 | .setfp \fp, sp |
| 908 | .else |
| 909 | add \fp, sp, #\offset |
| 910 | .setfp \fp, sp, #\offset |
| 911 | .endif |
| 912 | .macro dropfp; _dropfp \fp, \offset; .endm |
| 913 | .L$_frameptr_p = -1 |
| 914 | .endm |
| 915 | |
| 916 | .macro _dropfp fp, offset=0 |
| 917 | .if \offset == 0 |
| 918 | mov sp, \fp |
| 919 | .else |
| 920 | sub sp, \fp, #\offset |
| 921 | .endif |
| 922 | .purgem dropfp |
| 923 | .L$_frameptr_p = 0 |
| 924 | .endm |
| 925 | |
| 926 | .macro stalloc n |
| 927 | sub sp, sp, #\n |
| 928 | .pad #\n |
| 929 | .endm |
| 930 | |
| 931 | .macro stfree n |
| 932 | add sp, sp, #\n |
| 933 | .pad #-\n |
| 934 | .endm |
| 935 | |
| 936 | .macro pushreg rr:vararg |
| 937 | push {\rr} |
| 938 | .save {\rr} |
| 939 | .endm |
| 940 | |
| 941 | .macro popreg rr:vararg |
| 942 | pop {\rr} |
| 943 | .endm |
| 944 | |
| 945 | .macro pushvfp rr:vararg |
| 946 | vstmdb sp!, {\rr} |
| 947 | .vsave {\rr} |
| 948 | .endm |
| 949 | |
| 950 | .macro popvfp rr:vararg |
| 951 | vldmia sp!, {\rr} |
| 952 | .endm |
| 953 | |
| 954 | .macro endprologue |
| 955 | .endm |
| 956 | |
| 957 | // No need for prologue markers on ARM. |
| 958 | #define FUNC_POSTHOOK(_) .L$_prologue_p = -1 |
| 959 | |
| 960 | #endif |
| 961 | |
| 962 | ///-------------------------------------------------------------------------- |
| 963 | /// AArch64-specific hacking. |
| 964 | |
| 965 | #if CPUFAM_ARM64 |
| 966 | |
| 967 | // Set the function hooks. |
| 968 | #define FUNC_PREHOOK(_) .balign 4 |
| 969 | #define FUNC_POSTHOOK(_) .cfi_startproc; .L$_prologue_p = -1 |
| 970 | #define ENDFUNC_HOOK(_) .cfi_endproc |
| 971 | |
| 972 | // Call external subroutine at ADDR, possibly via PLT. |
| 973 | .macro callext addr |
| 974 | bl \addr |
| 975 | .endm |
| 976 | |
| 977 | // Load address of external symbol ADDR into REG. |
| 978 | .macro leaext reg, addr |
| 979 | #if WANT_PIC |
| 980 | adrp \reg, :got:\addr |
| 981 | ldr \reg, [\reg, #:got_lo12:\addr] |
| 982 | #else |
| 983 | adrp \reg, \addr |
| 984 | add \reg, \reg, #:lo12:\addr |
| 985 | #endif |
| 986 | .endm |
| 987 | |
| 988 | .macro vzero vz=v31 |
| 989 | // Set VZ (default v31) to zero. |
| 990 | dup \vz\().4s, wzr |
| 991 | .endm |
| 992 | |
| 993 | .macro vshl128 vd, vn, nbit, vz=v31 |
| 994 | // Set VD to VN shifted left by NBIT. Assume VZ (default v31) is |
| 995 | // all-bits-zero. NBIT must be a multiple of 8. |
| 996 | .if \nbit&3 != 0 |
| 997 | .error "shift quantity must be whole number of bytes" |
| 998 | .endif |
| 999 | ext \vd\().16b, \vz\().16b, \vn\().16b, #16 - (\nbit >> 3) |
| 1000 | .endm |
| 1001 | |
| 1002 | .macro vshr128 vd, vn, nbit, vz=v31 |
| 1003 | // Set VD to VN shifted right by NBIT. Assume VZ (default v31) is |
| 1004 | // all-bits-zero. NBIT must be a multiple of 8. |
| 1005 | .if \nbit&3 != 0 |
| 1006 | .error "shift quantity must be whole number of bytes" |
| 1007 | .endif |
| 1008 | ext \vd\().16b, \vn\().16b, \vz\().16b, #\nbit >> 3 |
| 1009 | .endm |
| 1010 | |
| 1011 | // Stack management and unwinding. |
| 1012 | .macro setfp fp=x29, offset=0 |
| 1013 | // If you're just going through the motions with a fixed-size stack frame, |
| 1014 | // then you want to say `add x29, sp, #OFFSET' directly, which will avoid |
| 1015 | // pointlessly restoring sp later. |
| 1016 | .if \offset == 0 |
| 1017 | mov \fp, sp |
| 1018 | .cfi_def_cfa_register \fp |
| 1019 | .else |
| 1020 | add \fp, sp, #\offset |
| 1021 | .cfi_def_cfa_register \fp |
| 1022 | .cfi_adjust_cfa_offset -\offset |
| 1023 | .endif |
| 1024 | .macro dropfp; _dropfp \fp, \offset; .endm |
| 1025 | .L$_frameptr_p = -1 |
| 1026 | .endm |
| 1027 | |
| 1028 | .macro _dropfp fp, offset=0 |
| 1029 | .if \offset == 0 |
| 1030 | mov sp, \fp |
| 1031 | .cfi_def_cfa_register sp |
| 1032 | .else |
| 1033 | sub sp, \fp, #\offset |
| 1034 | .cfi_def_cfa_register sp |
| 1035 | .cfi_adjust_cfa_offset +\offset |
| 1036 | .endif |
| 1037 | .purgem dropfp |
| 1038 | .L$_frameptr_p = 0 |
| 1039 | .endm |
| 1040 | |
| 1041 | .macro stalloc n |
| 1042 | sub sp, sp, #\n |
| 1043 | .cfi_adjust_cfa_offset +\n |
| 1044 | .endm |
| 1045 | |
| 1046 | .macro stfree n |
| 1047 | add sp, sp, #\n |
| 1048 | .cfi_adjust_cfa_offset -\n |
| 1049 | .endm |
| 1050 | |
| 1051 | .macro pushreg x, y=nil |
| 1052 | .ifeqs "\y", "nil" |
| 1053 | str \x, [sp, #-16]! |
| 1054 | .cfi_adjust_cfa_offset +16 |
| 1055 | .cfi_rel_offset \x, 0 |
| 1056 | .else |
| 1057 | stp \x, \y, [sp, #-16]! |
| 1058 | .cfi_adjust_cfa_offset +16 |
| 1059 | .cfi_rel_offset \x, 0 |
| 1060 | .cfi_rel_offset \y, 8 |
| 1061 | .endif |
| 1062 | .endm |
| 1063 | |
| 1064 | .macro popreg x, y=nil |
| 1065 | .ifeqs "\y", "nil" |
| 1066 | ldr \x, [sp], #16 |
| 1067 | .cfi_restore \x |
| 1068 | .cfi_adjust_cfa_offset -16 |
| 1069 | .else |
| 1070 | ldp \x, \y, [sp], #16 |
| 1071 | .cfi_restore \x |
| 1072 | .cfi_restore \y |
| 1073 | .cfi_adjust_cfa_offset -16 |
| 1074 | .endif |
| 1075 | .endm |
| 1076 | |
| 1077 | .macro savereg x, y, z=nil |
| 1078 | .ifeqs "\z", "nil" |
| 1079 | str \x, [sp, \y] |
| 1080 | .cfi_rel_offset \x, \y |
| 1081 | .else |
| 1082 | stp \x, \y, [sp, #\z] |
| 1083 | .cfi_rel_offset \x, \z |
| 1084 | .cfi_rel_offset \y, \z + 8 |
| 1085 | .endif |
| 1086 | .endm |
| 1087 | |
| 1088 | .macro rstrreg x, y, z=nil |
| 1089 | .ifeqs "\z", "nil" |
| 1090 | ldr \x, [sp, \y] |
| 1091 | .cfi_restore \x |
| 1092 | .else |
| 1093 | ldp \x, \y, [sp, #\z] |
| 1094 | .cfi_restore \x |
| 1095 | .cfi_restore \y |
| 1096 | .endif |
| 1097 | .endm |
| 1098 | |
| 1099 | .macro endprologue |
| 1100 | .endm |
| 1101 | |
| 1102 | #endif |
| 1103 | |
| 1104 | ///-------------------------------------------------------------------------- |
| 1105 | /// Final stuff. |
| 1106 | |
| 1107 | // Default values for the various hooks. |
| 1108 | #ifndef FUNC_PREHOOK |
| 1109 | # define FUNC_PREHOOK(_) |
| 1110 | #endif |
| 1111 | #ifndef FUNC_POSTHOOK |
| 1112 | # define FUNC_POSTHOOK(_) |
| 1113 | #endif |
| 1114 | #ifndef ENDFUNC_HOOK |
| 1115 | # define ENDFUNC_HOOK(_) |
| 1116 | #endif |
| 1117 | |
| 1118 | #ifndef F |
| 1119 | # define F(name) name |
| 1120 | #endif |
| 1121 | |
| 1122 | #ifndef TYPE_FUNC |
| 1123 | # define TYPE_FUNC(name) |
| 1124 | #endif |
| 1125 | |
| 1126 | #ifndef SIZE_OBJ |
| 1127 | # define SIZE_OBJ(name) |
| 1128 | #endif |
| 1129 | |
| 1130 | #if __ELF__ && !defined(WANT_EXECUTABLE_STACK) |
| 1131 | .pushsection .note.GNU-stack, "", _SECTTY(progbits) |
| 1132 | .popsection |
| 1133 | #endif |
| 1134 | |
| 1135 | ///----- That's all, folks -------------------------------------------------- |
| 1136 | |
| 1137 | #endif |