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| 1 | /* Assembly macros for 64-bit PowerPC. |
|---|---|
| 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sysdeps/powerpc/sysdep.h> |
| 20 | #include <tls.h> |
| 21 | |
| 22 | #ifdef __ASSEMBLER__ |
| 23 | |
| 24 | /* Stack frame offsets. */ |
| 25 | #define FRAME_BACKCHAIN 0 |
| 26 | #define FRAME_CR_SAVE 8 |
| 27 | #define FRAME_LR_SAVE 16 |
| 28 | #if _CALL_ELF != 2 |
| 29 | #define FRAME_MIN_SIZE 112 |
| 30 | #define FRAME_MIN_SIZE_PARM 112 |
| 31 | #define FRAME_TOC_SAVE 40 |
| 32 | #define FRAME_PARM_SAVE 48 |
| 33 | #else |
| 34 | #define FRAME_MIN_SIZE 32 |
| 35 | #define FRAME_MIN_SIZE_PARM 96 |
| 36 | #define FRAME_TOC_SAVE 24 |
| 37 | #define FRAME_PARM_SAVE 32 |
| 38 | #endif |
| 39 | |
| 40 | /* Support macros for CALL_MCOUNT. */ |
| 41 | .macro SAVE_ARG NARG |
| 42 | .if \NARG |
| 43 | SAVE_ARG \NARG-1 |
| 44 | std 2+\NARG,-FRAME_MIN_SIZE_PARM+FRAME_PARM_SAVE-8+8*(\NARG)(1) |
| 45 | .endif |
| 46 | .endm |
| 47 | |
| 48 | .macro REST_ARG NARG |
| 49 | .if \NARG |
| 50 | REST_ARG \NARG-1 |
| 51 | ld 2+\NARG,FRAME_PARM_SAVE-8+8*(\NARG)(1) |
| 52 | .endif |
| 53 | .endm |
| 54 | |
| 55 | .macro CFI_SAVE_ARG NARG |
| 56 | .if \NARG |
| 57 | CFI_SAVE_ARG \NARG-1 |
| 58 | cfi_offset(2+\NARG,-FRAME_MIN_SIZE_PARM+FRAME_PARM_SAVE-8+8*(\NARG)) |
| 59 | .endif |
| 60 | .endm |
| 61 | |
| 62 | .macro CFI_REST_ARG NARG |
| 63 | .if \NARG |
| 64 | CFI_REST_ARG \NARG-1 |
| 65 | cfi_restore(2+\NARG) |
| 66 | .endif |
| 67 | .endm |
| 68 | |
| 69 | /* If compiled for profiling, call `_mcount' at the start of each function. |
| 70 | see ppc-mcount.S for more details. */ |
| 71 | .macro CALL_MCOUNT NARG |
| 72 | #ifdef PROF |
| 73 | mflr r0 |
| 74 | SAVE_ARG \NARG |
| 75 | std r0,FRAME_LR_SAVE(r1) |
| 76 | stdu r1,-FRAME_MIN_SIZE_PARM(r1) |
| 77 | cfi_adjust_cfa_offset(FRAME_MIN_SIZE_PARM) |
| 78 | cfi_offset(lr,FRAME_LR_SAVE) |
| 79 | CFI_SAVE_ARG \NARG |
| 80 | bl JUMPTARGET (_mcount) |
| 81 | #ifndef SHARED |
| 82 | nop |
| 83 | #endif |
| 84 | ld r0,FRAME_MIN_SIZE_PARM+FRAME_LR_SAVE(r1) |
| 85 | REST_ARG \NARG |
| 86 | mtlr r0 |
| 87 | addi r1,r1,FRAME_MIN_SIZE_PARM |
| 88 | cfi_adjust_cfa_offset(-FRAME_MIN_SIZE_PARM) |
| 89 | cfi_restore(lr) |
| 90 | CFI_REST_ARG \NARG |
| 91 | #endif |
| 92 | .endm |
| 93 | |
| 94 | #if _CALL_ELF != 2 |
| 95 | |
| 96 | /* Macro to prepare for calling via a function pointer. */ |
| 97 | .macro PPC64_LOAD_FUNCPTR PTR |
| 98 | ld r12,0(\PTR) |
| 99 | ld r2,8(\PTR) |
| 100 | mtctr r12 |
| 101 | ld r11,16(\PTR) |
| 102 | .endm |
| 103 | |
| 104 | #ifdef USE_PPC64_OVERLAPPING_OPD |
| 105 | # define OPD_ENT(name) .quad BODY_LABEL (name), .TOC.@tocbase |
| 106 | #else |
| 107 | # define OPD_ENT(name) .quad BODY_LABEL (name), .TOC.@tocbase, 0 |
| 108 | #endif |
| 109 | |
| 110 | #define ENTRY_1(name) \ |
| 111 | .type BODY_LABEL(name),@function; \ |
| 112 | .globl name; \ |
| 113 | .section ".opd","aw"; \ |
| 114 | .p2align 3;FUNC_LABEL(name): \ |
| 115 | OPD_ENT (name); \ |
| 116 | .previous |
| 117 | |
| 118 | #define FUNC_LABEL(X) X |
| 119 | #define BODY_LABEL(X) .LY##X |
| 120 | #define ENTRY_2(name) \ |
| 121 | .type name,@function; \ |
| 122 | ENTRY_1(name) |
| 123 | #define END_2(name) \ |
| 124 | .size name,.-BODY_LABEL(name); \ |
| 125 | .size BODY_LABEL(name),.-BODY_LABEL(name) |
| 126 | #define LOCALENTRY(name) |
| 127 | |
| 128 | #else /* _CALL_ELF == 2 */ |
| 129 | |
| 130 | /* Macro to prepare for calling via a function pointer. */ |
| 131 | .macro PPC64_LOAD_FUNCPTR PTR |
| 132 | mr r12,\PTR |
| 133 | mtctr r12 |
| 134 | .endm |
| 135 | |
| 136 | #define FUNC_LABEL(X) X |
| 137 | #define BODY_LABEL(X) X |
| 138 | #define ENTRY_2(name) \ |
| 139 | .globl name; \ |
| 140 | .type name,@function |
| 141 | #define END_2(name) \ |
| 142 | .size name,.-name |
| 143 | #define LOCALENTRY(name) \ |
| 144 | 1: addis r2,r12,.TOC.-1b@ha; \ |
| 145 | addi r2,r2,.TOC.-1b@l; \ |
| 146 | .localentry name,.-name |
| 147 | |
| 148 | #endif /* _CALL_ELF */ |
| 149 | |
| 150 | .macro NOPS NARG |
| 151 | .if \NARG |
| 152 | NOPS \NARG-1 |
| 153 | nop |
| 154 | .endif |
| 155 | .endm |
| 156 | |
| 157 | .macro ENTRY_3 name, alignp2=2, nopwords=0 |
| 158 | .text |
| 159 | ENTRY_2(\name) |
| 160 | .p2align \alignp2 |
| 161 | NOPS \nopwords |
| 162 | BODY_LABEL(\name): |
| 163 | .endm |
| 164 | |
| 165 | /* Use ENTRY_TOCLESS for functions that make no use of r2 and |
| 166 | guarantee r2 is unchanged on exit. Any function that has @toc or |
| 167 | @got relocs uses r2. Functions that call other functions via the |
| 168 | PLT use r2. Use ENTRY for functions that may use or change r2. |
| 169 | The first argument is the function name. |
| 170 | The optional second argument specifies alignment of the function's |
| 171 | code, as the logarithm base two of the byte alignment. For |
| 172 | example, a value of four aligns to a sixteen byte boundary. |
| 173 | The optional third argument specifies the number of NOPs to emit |
| 174 | before the start of the function's code. */ |
| 175 | #ifndef PROF |
| 176 | #define ENTRY_TOCLESS(name, ...) \ |
| 177 | ENTRY_3 name, ## __VA_ARGS__; \ |
| 178 | cfi_startproc |
| 179 | |
| 180 | #define ENTRY(name, ...) \ |
| 181 | ENTRY_TOCLESS(name, ## __VA_ARGS__); \ |
| 182 | LOCALENTRY(name) |
| 183 | #else |
| 184 | /* The call to _mcount is potentially via the plt, so profiling code |
| 185 | is never free of an r2 use. */ |
| 186 | #define ENTRY_TOCLESS(name, ...) \ |
| 187 | ENTRY_3 name, ## __VA_ARGS__; \ |
| 188 | cfi_startproc; \ |
| 189 | LOCALENTRY(name) |
| 190 | |
| 191 | #define ENTRY(name, ...) \ |
| 192 | ENTRY_TOCLESS(name, ## __VA_ARGS__) |
| 193 | #endif |
| 194 | |
| 195 | /* Local labels stripped out by the linker. */ |
| 196 | #undef L |
| 197 | #define L(x) .L##x |
| 198 | |
| 199 | #define tostring(s) #s |
| 200 | #define stringify(s) tostring(s) |
| 201 | #define XGLUE(a,b) a##b |
| 202 | #define GLUE(a,b) XGLUE(a,b) |
| 203 | #define LT_LABEL(name) GLUE(.LT,name) |
| 204 | #define LT_LABELSUFFIX(name,suffix) GLUE(GLUE(.LT,name),suffix) |
| 205 | |
| 206 | /* Support Traceback tables */ |
| 207 | #define TB_ASM 0x000c000000000000 |
| 208 | #define TB_GLOBALLINK 0x0000800000000000 |
| 209 | #define TB_IS_EPROL 0x0000400000000000 |
| 210 | #define TB_HAS_TBOFF 0x0000200000000000 |
| 211 | #define TB_INT_PROC 0x0000100000000000 |
| 212 | #define TB_HAS_CTL 0x0000080000000000 |
| 213 | #define TB_TOCLESS 0x0000040000000000 |
| 214 | #define TB_FP_PRESENT 0x0000020000000000 |
| 215 | #define TB_LOG_ABORT 0x0000010000000000 |
| 216 | #define TB_INT_HANDL 0x0000008000000000 |
| 217 | #define TB_NAME_PRESENT 0x0000004000000000 |
| 218 | #define TB_USES_ALLOCA 0x0000002000000000 |
| 219 | #define TB_SAVES_CR 0x0000000200000000 |
| 220 | #define TB_SAVES_LR 0x0000000100000000 |
| 221 | #define TB_STORES_BC 0x0000000080000000 |
| 222 | #define TB_FIXUP 0x0000000040000000 |
| 223 | #define TB_FP_SAVED(fprs) (((fprs) & 0x3f) << 24) |
| 224 | #define TB_GPR_SAVED(gprs) (((fprs) & 0x3f) << 16) |
| 225 | #define TB_FIXEDPARMS(parms) (((parms) & 0xff) << 8) |
| 226 | #define TB_FLOATPARMS(parms) (((parms) & 0x7f) << 1) |
| 227 | #define TB_PARMSONSTK 0x0000000000000001 |
| 228 | |
| 229 | #define PPC_HIGHER(v) (((v) >> 32) & 0xffff) |
| 230 | #define TB_DEFAULT TB_ASM | TB_HAS_TBOFF | TB_NAME_PRESENT |
| 231 | |
| 232 | #define TRACEBACK(name) \ |
| 233 | LT_LABEL(name): ; \ |
| 234 | .long 0 ; \ |
| 235 | .quad TB_DEFAULT ; \ |
| 236 | .long LT_LABEL(name)-BODY_LABEL(name) ; \ |
| 237 | .short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \ |
| 238 | LT_LABELSUFFIX(name,_name_start): ;\ |
| 239 | .ascii stringify(name) ; \ |
| 240 | LT_LABELSUFFIX(name,_name_end): ; \ |
| 241 | .p2align 2 |
| 242 | |
| 243 | #define TRACEBACK_MASK(name,mask) \ |
| 244 | LT_LABEL(name): ; \ |
| 245 | .long 0 ; \ |
| 246 | .quad TB_DEFAULT | mask ; \ |
| 247 | .long LT_LABEL(name)-BODY_LABEL(name) ; \ |
| 248 | .short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \ |
| 249 | LT_LABELSUFFIX(name,_name_start): ;\ |
| 250 | .ascii stringify(name) ; \ |
| 251 | LT_LABELSUFFIX(name,_name_end): ; \ |
| 252 | .p2align 2 |
| 253 | |
| 254 | /* END generates Traceback tables */ |
| 255 | #undef END |
| 256 | #define END(name) \ |
| 257 | cfi_endproc; \ |
| 258 | TRACEBACK(name); \ |
| 259 | END_2(name) |
| 260 | |
| 261 | /* This form supports more informative traceback tables */ |
| 262 | #define END_GEN_TB(name,mask) \ |
| 263 | cfi_endproc; \ |
| 264 | TRACEBACK_MASK(name,mask); \ |
| 265 | END_2(name) |
| 266 | |
| 267 | /* We will allocate a new frame to save LR and the non-volatile register used to |
| 268 | read the TCB when checking for scv support on syscall code. We actually just |
| 269 | need the minimum frame size plus room for 1 reg (8 bytes). But the ABI |
| 270 | mandates stack frames should be aligned at 16 Bytes, so we end up allocating |
| 271 | a bit more space then what will actually be used. */ |
| 272 | #define SCV_FRAME_SIZE (FRAME_MIN_SIZE+16) |
| 273 | #define SCV_FRAME_NVOLREG_SAVE FRAME_MIN_SIZE |
| 274 | |
| 275 | /* Allocate frame and save register */ |
| 276 | #define NVOLREG_SAVE \ |
| 277 | stdu r1,-SCV_FRAME_SIZE(r1); \ |
| 278 | cfi_adjust_cfa_offset(SCV_FRAME_SIZE); \ |
| 279 | std r31,SCV_FRAME_NVOLREG_SAVE(r1); \ |
| 280 | cfi_rel_offset(r31,SCV_FRAME_NVOLREG_SAVE); |
| 281 | |
| 282 | /* Restore register and destroy frame */ |
| 283 | #define NVOLREG_RESTORE \ |
| 284 | ld r31,SCV_FRAME_NVOLREG_SAVE(r1); \ |
| 285 | cfi_restore(r31); \ |
| 286 | addi r1,r1,SCV_FRAME_SIZE; \ |
| 287 | cfi_adjust_cfa_offset(-SCV_FRAME_SIZE); |
| 288 | |
| 289 | /* Check PPC_FEATURE2_SCV bit from hwcap2 in the TCB. If it is not set, scv is |
| 290 | not available, then go to JUMPFALSE (label given by the macro's caller). We |
| 291 | save the value we read from the TCB in a non-volatile register so we can |
| 292 | reuse it later when exiting from the syscall in PSEUDO_RET. Note that for |
| 293 | the static case we need an extra check to guarantee the thread pointer has |
| 294 | already been initialized, otherwise we may try to access an invalid address |
| 295 | if a syscall is called before the TLS has been setup. */ |
| 296 | .macro CHECK_SCV_SUPPORT REG JUMPFALSE |
| 297 | |
| 298 | #ifndef SHARED |
| 299 | /* Check if thread pointer has already been setup. */ |
| 300 | cmpdi r13,0 |
| 301 | beq \JUMPFALSE |
| 302 | #endif |
| 303 | |
| 304 | /* Read PPC_FEATURE2_SCV from TCB and store it in REG */ |
| 305 | ld \REG,TCB_HWCAP(PT_THREAD_POINTER) |
| 306 | andis. \REG,\REG,PPC_FEATURE2_SCV>>16 |
| 307 | |
| 308 | beq \JUMPFALSE |
| 309 | .endm |
| 310 | |
| 311 | #if !defined(USE_PPC_SCV) || IS_IN(rtld) |
| 312 | # define DO_CALL(syscall) \ |
| 313 | li r0,syscall; \ |
| 314 | DO_CALL_SC |
| 315 | #else |
| 316 | /* Before doing the syscall, check if we can use scv. scv is supported by P9 |
| 317 | and later with Linux v5.9 and later. If so, use it. Otherwise, fallback to |
| 318 | sc. We use a non-volatile register to save hwcap2 from the TCB, so we need |
| 319 | to save its content beforehand. */ |
| 320 | # define DO_CALL(syscall) \ |
| 321 | li r0,syscall; \ |
| 322 | NVOLREG_SAVE; \ |
| 323 | CHECK_SCV_SUPPORT r31 0f; \ |
| 324 | DO_CALL_SCV; \ |
| 325 | b 1f; \ |
| 326 | 0: DO_CALL_SC; \ |
| 327 | 1: |
| 328 | #endif /* !defined(USE_PPC_SCV) || IS_IN(rtld) */ |
| 329 | |
| 330 | /* DO_CALL_SC and DO_CALL_SCV expect the syscall number to be in r0. */ |
| 331 | #define DO_CALL_SC \ |
| 332 | sc |
| 333 | |
| 334 | #define DO_CALL_SCV \ |
| 335 | mflr r9; \ |
| 336 | std r9,SCV_FRAME_SIZE+FRAME_LR_SAVE(r1); \ |
| 337 | cfi_rel_offset(lr,SCV_FRAME_SIZE+FRAME_LR_SAVE); \ |
| 338 | .machine "push"; \ |
| 339 | .machine "power9"; \ |
| 340 | scv 0; \ |
| 341 | .machine "pop"; \ |
| 342 | ld r9,SCV_FRAME_SIZE+FRAME_LR_SAVE(r1); \ |
| 343 | mtlr r9; \ |
| 344 | cfi_restore(lr); |
| 345 | |
| 346 | /* ppc64 is always PIC */ |
| 347 | #undef JUMPTARGET |
| 348 | #define JUMPTARGET(name) FUNC_LABEL(name) |
| 349 | |
| 350 | #define PSEUDO(name, syscall_name, args) \ |
| 351 | .section ".text"; \ |
| 352 | ENTRY (name); \ |
| 353 | DO_CALL (SYS_ify (syscall_name)) |
| 354 | |
| 355 | #ifdef SHARED |
| 356 | #define TAIL_CALL_SYSCALL_ERROR \ |
| 357 | b JUMPTARGET (NOTOC (__syscall_error)) |
| 358 | #else |
| 359 | /* Static version might be linked into a large app with a toc exceeding |
| 360 | 64k. We can't put a toc adjusting stub on a plain branch, so can't |
| 361 | tail call __syscall_error. */ |
| 362 | #define TAIL_CALL_SYSCALL_ERROR \ |
| 363 | .ifdef .Local_syscall_error; \ |
| 364 | b .Local_syscall_error; \ |
| 365 | .else; \ |
| 366 | .Local_syscall_error: \ |
| 367 | mflr 0; \ |
| 368 | std 0,FRAME_LR_SAVE(1); \ |
| 369 | stdu 1,-FRAME_MIN_SIZE(1); \ |
| 370 | cfi_adjust_cfa_offset(FRAME_MIN_SIZE); \ |
| 371 | cfi_offset(lr,FRAME_LR_SAVE); \ |
| 372 | bl JUMPTARGET(__syscall_error); \ |
| 373 | nop; \ |
| 374 | ld 0,FRAME_MIN_SIZE+FRAME_LR_SAVE(1); \ |
| 375 | addi 1,1,FRAME_MIN_SIZE; \ |
| 376 | cfi_adjust_cfa_offset(-FRAME_MIN_SIZE); \ |
| 377 | mtlr 0; \ |
| 378 | cfi_restore(lr); \ |
| 379 | blr; \ |
| 380 | .endif |
| 381 | #endif |
| 382 | |
| 383 | #if !defined(USE_PPC_SCV) || IS_IN(rtld) |
| 384 | # define PSEUDO_RET \ |
| 385 | RET_SC; \ |
| 386 | TAIL_CALL_SYSCALL_ERROR |
| 387 | #else |
| 388 | /* This should only be called after a DO_CALL. In such cases, r31 contains the |
| 389 | value of PPC_FEATURE2_SCV read from hwcap2 by CHECK_SCV_SUPPORT. If it is |
| 390 | set, we know we have entered the kernel using scv, so handle the return code |
| 391 | accordingly. */ |
| 392 | # define PSEUDO_RET \ |
| 393 | cmpdi cr5,r31,0; \ |
| 394 | NVOLREG_RESTORE; \ |
| 395 | beq cr5,0f; \ |
| 396 | RET_SCV; \ |
| 397 | b 1f; \ |
| 398 | 0: RET_SC; \ |
| 399 | 1: TAIL_CALL_SYSCALL_ERROR |
| 400 | #endif /* !defined(USE_PPC_SCV) || IS_IN(rtld) */ |
| 401 | |
| 402 | #define RET_SCV \ |
| 403 | li r9,-4095; \ |
| 404 | cmpld r3,r9; \ |
| 405 | bltlr+; \ |
| 406 | neg r3,r3; |
| 407 | |
| 408 | #define RET_SC \ |
| 409 | bnslr+; |
| 410 | |
| 411 | #define ret PSEUDO_RET |
| 412 | |
| 413 | #undef PSEUDO_END |
| 414 | #define PSEUDO_END(name) \ |
| 415 | END (name) |
| 416 | |
| 417 | #define PSEUDO_NOERRNO(name, syscall_name, args) \ |
| 418 | .section ".text"; \ |
| 419 | ENTRY (name); \ |
| 420 | DO_CALL (SYS_ify (syscall_name)) |
| 421 | |
| 422 | #if !defined(USE_PPC_SCV) || IS_IN(rtld) |
| 423 | # define PSEUDO_RET_NOERRNO \ |
| 424 | blr |
| 425 | #else |
| 426 | /* This should only be called after a DO_CALL. */ |
| 427 | # define PSEUDO_RET_NOERRNO \ |
| 428 | NVOLREG_RESTORE; \ |
| 429 | blr |
| 430 | #endif /* !defined(USE_PPC_SCV) || IS_IN(rtld) */ |
| 431 | |
| 432 | #define ret_NOERRNO PSEUDO_RET_NOERRNO |
| 433 | |
| 434 | #undef PSEUDO_END_NOERRNO |
| 435 | #define PSEUDO_END_NOERRNO(name) \ |
| 436 | END (name) |
| 437 | |
| 438 | #define PSEUDO_ERRVAL(name, syscall_name, args) \ |
| 439 | .section ".text"; \ |
| 440 | ENTRY (name); \ |
| 441 | DO_CALL (SYS_ify (syscall_name)) |
| 442 | |
| 443 | #if !defined(USE_PPC_SCV) || IS_IN(rtld) |
| 444 | # define PSEUDO_RET_ERRVAL \ |
| 445 | blr |
| 446 | #else |
| 447 | /* This should only be called after a DO_CALL. */ |
| 448 | # define PSEUDO_RET_ERRVAL \ |
| 449 | NVOLREG_RESTORE; \ |
| 450 | blr |
| 451 | #endif /* !defined(USE_PPC_SCV) || IS_IN(rtld) */ |
| 452 | |
| 453 | #define ret_ERRVAL PSEUDO_RET_ERRVAL |
| 454 | |
| 455 | #undef PSEUDO_END_ERRVAL |
| 456 | #define PSEUDO_END_ERRVAL(name) \ |
| 457 | END (name) |
| 458 | |
| 459 | #ifdef SHARED |
| 460 | # if IS_IN (rtld) |
| 461 | /* Inside ld.so we use the local alias to avoid runtime GOT |
| 462 | relocations. */ |
| 463 | # define __GLRO_DEF(var) \ |
| 464 | .LC__ ## var: \ |
| 465 | .tc _rtld_local_ro[TC],_rtld_local_ro |
| 466 | # else |
| 467 | # define __GLRO_DEF(var) \ |
| 468 | .LC__ ## var: \ |
| 469 | .tc _rtld_global_ro[TC],_rtld_global_ro |
| 470 | # endif |
| 471 | # define __GLRO(rOUT, var, offset) \ |
| 472 | addis rOUT,r2,.LC__ ## var@toc@ha; \ |
| 473 | ld rOUT,.LC__ ## var@toc@l(rOUT); \ |
| 474 | lwz rOUT,offset(rOUT) |
| 475 | #else |
| 476 | # define __GLRO_DEF(var) \ |
| 477 | .LC__ ## var: \ |
| 478 | .tc _ ## var[TC],_ ## var |
| 479 | # define __GLRO(rOUT, var, offset) \ |
| 480 | addis rOUT,r2,.LC__ ## var@toc@ha; \ |
| 481 | ld rOUT,.LC__ ## var@toc@l(rOUT); \ |
| 482 | lwz rOUT,0(rOUT) |
| 483 | #endif |
| 484 | |
| 485 | #ifdef USE_PPC64_NOTOC |
| 486 | # define NOTOC(l) l@notoc |
| 487 | #else |
| 488 | # define NOTOC(l) l |
| 489 | #endif |
| 490 | |
| 491 | #else /* !__ASSEMBLER__ */ |
| 492 | |
| 493 | #if _CALL_ELF != 2 |
| 494 | |
| 495 | #define PPC64_LOAD_FUNCPTR(ptr) \ |
| 496 | "ld 12,0(" #ptr ")\n" \ |
| 497 | "ld 2,8(" #ptr ")\n" \ |
| 498 | "mtctr 12\n" \ |
| 499 | "ld 11,16(" #ptr ")" |
| 500 | |
| 501 | #ifdef USE_PPC64_OVERLAPPING_OPD |
| 502 | # define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase" |
| 503 | #else |
| 504 | # define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase, 0" |
| 505 | #endif |
| 506 | |
| 507 | #define ENTRY_1(name) \ |
| 508 | ".type " BODY_PREFIX #name ",@function\n" \ |
| 509 | ".globl " #name "\n" \ |
| 510 | ".pushsection \".opd\",\"aw\"\n" \ |
| 511 | ".p2align 3\n" \ |
| 512 | #name ":\n" \ |
| 513 | OPD_ENT (name) "\n" \ |
| 514 | ".popsection" |
| 515 | |
| 516 | #define DOT_PREFIX "" |
| 517 | #define BODY_PREFIX ".LY" |
| 518 | #define ENTRY_2(name) \ |
| 519 | ".type " #name ",@function\n" \ |
| 520 | ENTRY_1(name) |
| 521 | #define END_2(name) \ |
| 522 | ".size " #name ",.-" BODY_PREFIX #name "\n" \ |
| 523 | ".size " BODY_PREFIX #name ",.-" BODY_PREFIX #name |
| 524 | #define LOCALENTRY(name) |
| 525 | |
| 526 | #else /* _CALL_ELF */ |
| 527 | |
| 528 | #define PPC64_LOAD_FUNCPTR(ptr) \ |
| 529 | "mr 12," #ptr "\n" \ |
| 530 | "mtctr 12" |
| 531 | |
| 532 | #define DOT_PREFIX "" |
| 533 | #define BODY_PREFIX "" |
| 534 | #define ENTRY_2(name) \ |
| 535 | ".type " #name ",@function\n" \ |
| 536 | ".globl " #name |
| 537 | #define END_2(name) \ |
| 538 | ".size " #name ",.-" #name |
| 539 | #define LOCALENTRY(name) \ |
| 540 | "1: addis 2,12,.TOC.-1b@ha\n" \ |
| 541 | "addi 2,2,.TOC.-1b@l\n" \ |
| 542 | ".localentry " #name ",.-" #name |
| 543 | |
| 544 | #endif /* _CALL_ELF */ |
| 545 | |
| 546 | #endif /* __ASSEMBLER__ */ |
| 547 |
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