1 /// -*- mode: asm; asm-comment-char: ?/ -*-
3 /// Common definitions for asesembler source files
5 /// (c) 2015 Straylight/Edgeware
8 ///----- Licensing notice ---------------------------------------------------
10 /// This file is part of Catacomb.
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.
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.
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.
27 #ifndef CATACOMB_ASM_COMMON_H
28 #define CATACOMB_ASM_COMMON_H
30 ///--------------------------------------------------------------------------
31 /// General definitions.
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
40 // Some useful variables.
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$_subsec
51 # define _SECTTY(ty) %ty
53 # define _SECTTY(ty) @ty
58 #define TEXT .text .L$_subsec
60 # define RODATA .section .rdata, "dr"
62 # define RODATA .section .rodata, "a", _SECTTY(progbits)
68 // Announcing an internal function.
69 #define INTFUNC(name) \
71 .macro ENDFUNC; _ENDFUNC(name); .endm; \
72 .L$_prologue_p = 0; .L$_frameptr_p = 0; \
77 // Announcing an external function.
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; \
91 // Make a helper function, if necessary.
93 .ifndef .L$_auxfn_def.name; \
95 .macro _ENDAUXFN; _ENDAUXFN_TAIL(name); .endm; \
98 #define _ENDAUXFN_TAIL(name) \
101 .L$_auxfn_def.name = 1
102 #define ENDAUXFN _ENDAUXFN; .endif
104 ///--------------------------------------------------------------------------
105 /// ELF-specific hacking.
109 #if __PIC__ || __PIE__
113 #define TYPE_FUNC(name) .type name, STT_FUNC
115 #define SIZE_OBJ(name) .size name, . - name
119 ///--------------------------------------------------------------------------
120 /// Windows-specific hacking.
125 # define F(name) _##name
130 ///--------------------------------------------------------------------------
131 /// x86- and amd64-specific hacking.
133 /// It's (slightly) easier to deal with both of these in one go.
135 #if CPUFAM_X86 || CPUFAM_AMD64
145 // Set the function hooks.
146 #define FUNC_PREHOOK(_) .balign 16
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'.
157 # define FUNC_POSTHOOK(_) .cfi_startproc
158 # define ENDFUNC_HOOK(_) .cfi_endproc
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
165 // Call external subroutine at ADDR, possibly via PLT.
174 // Do I need to arrange a spare GOT register?
175 #if WANT_PIC && CPUFAM_X86
178 #define GOTREG ebx // Not needed in AMD64 so don't care.
180 // Maybe load GOT address into GOT.
181 .macro ldgot got=GOTREG
182 #if WANT_PIC && CPUFAM_X86
188 add \got, offset _GLOBAL_OFFSET_TABLE_
192 // Load address of external symbol ADDR into REG, maybe using GOT.
193 .macro leaext reg, addr, got=GOTREG
196 mov \reg, [\got + \addr@GOT]
199 mov \reg, \addr@GOTPCREL[rip]
203 mov \reg, offset \addr
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)
216 # define INTADDR__1(addr, got) addr + rip
218 # define INTADDR__1(addr, got) got + addr@GOTOFF
220 # define INTADDR__1(addr, got) addr
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))
229 // Map register names to their individual pieces.
231 // Apply decoration decor to (internal) register name reg of type ty.
233 // See `R_...' for internal register names. Decorations are as follows.
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)
242 // And types are as follows.
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)
250 // Internal macros: _DECOR_ty_decor(reg) applies decoration decor to
251 // (internal) register name reg of type ty.
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
258 # define _DECOR_abcd_q(reg) r##reg##x
261 #define _DECOR_xp_w(reg) reg
262 #define _DECOR_xp_d(reg) e##reg
264 # define _DECOR_xp_b(reg) reg##l
265 # define _DECOR_xp_q(reg) r##reg
268 #define _DECOR_ip_w(reg) reg
269 #define _DECOR_ip_d(reg) e##reg
271 # define _DECOR_ip_q(reg) r##reg
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
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
286 # define _DECOR_mem_q(addr) qword ptr addr
289 #define _DECOR_imm_b(imm) byte imm
290 #define _DECOR_imm_w(imm) word imm
291 #define _DECOR_imm_d(imm) dword imm
293 # define _DECOR_imm_q(imm) qword imm
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
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
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)
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)
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)
338 // Refer to an immediate datum of the type implied by decor.
339 #define IMM(decor, imm) _DECOR(mem, decor, imm)
341 // Applies decoration decor to assembler-level register name reg.
342 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
344 // Internal macros: _REGFORM_r(decor) applies decoration decor to an
345 // assembler-level register name, in place of any decoration that register
348 #define _REGFORM_ip(decor) R_ip(decor)
349 #define _REGFORM_eip(decor) R_ip(decor)
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)
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)
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)
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)
375 #define _REGFORM_si(decor) R_si(decor)
376 #define _REGFORM_sil(decor) R_si(decor)
377 #define _REGFORM_esi(decor) R_si(decor)
379 #define _REGFORM_di(decor) R_di(decor)
380 #define _REGFORM_dil(decor) R_di(decor)
381 #define _REGFORM_edi(decor) R_di(decor)
383 #define _REGFORM_bp(decor) R_bp(decor)
384 #define _REGFORM_bpl(decor) R_bp(decor)
385 #define _REGFORM_ebp(decor) R_bp(decor)
387 #define _REGFORM_sp(decor) R_sp(decor)
388 #define _REGFORM_spl(decor) R_sp(decor)
389 #define _REGFORM_esp(decor) R_sp(decor)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
451 # define QWORD(reg) _REGFORM(reg, q)
453 #define WHOLE(reg) _REGFORM(reg, r)
455 // Stack management and unwinding.
456 .macro setfp fp=R_bp(r), offset=0
460 .cfi_def_cfa_register \fp
462 #if ABI_WIN && CPUFAM_AMD64
466 lea \fp, [R_sp(r) + \offset]
468 .cfi_def_cfa_register \fp
469 .cfi_adjust_cfa_offset -\offset
471 #if ABI_WIN && CPUFAM_AMD64
472 .seh_setframe \fp, \offset
476 .macro dropfp; _dropfp \fp, \offset; .endm
479 .macro _dropfp fp, offset=0
483 .cfi_def_cfa_register R_sp(r)
486 lea R_sp(r), [\fp - \offset]
488 .cfi_def_cfa_register R_sp(r)
489 .cfi_adjust_cfa_offset +\offset
499 .cfi_adjust_cfa_offset +\n
501 #if ABI_WIN && CPUFAM_AMD64
509 .cfi_adjust_cfa_offset -\n
516 .cfi_adjust_cfa_offset +WORDSZ
517 .cfi_rel_offset \r, 0
519 #if ABI_WIN && CPUFAM_AMD64
527 .cfi_adjust_cfa_offset -WORDSZ
532 .macro savexmm r, offset
533 movdqa [R_sp(r) + \offset], \r
534 #if ABI_WIN && CPUFAM_AMD64
535 .seh_savexmm \r, \offset
539 .macro rstrxmm r, offset
540 movdqa \r, [R_sp(r) + \offset]
544 #if ABI_WIN && CPUFAM_AMD64
552 ///--------------------------------------------------------------------------
553 /// ARM-specific hacking.
557 // ARM/Thumb mode things. Use ARM by default.
558 #define ARM .arm; .L$_pcoff = 8
559 #define THUMB .thumb; .L$_pcoff = 4
562 // Set the function hooks.
563 #define FUNC_PREHOOK(_) .balign 4; .fnstart
564 #define ENDFUNC_HOOK(_) .fnend; .ltorg
566 // Call external subroutine at ADDR, possibly via PLT.
567 .macro callext addr, cond=
575 // Do I need to arrange a spare GOT register?
581 // Maybe load GOT address into GOT.
582 .macro ldgot cond=, got=GOTREG
584 ldr\cond \got, .L$_ldgot$\@
586 add\cond \got, pc, \got
590 .word _GLOBAL_OFFSET_TABLE_ - .L$_ldgot_pc$\@ - .L$_pcoff
595 // Load address of external symbol ADDR into REG, maybe using GOT.
596 .macro leaext reg, addr, cond=, got=GOTREG
598 ldr\cond \reg, .L$_leaext$\@
599 ldr\cond \reg, [\got, \reg]
606 ldr\cond \reg, =\addr
610 // Load address of external symbol ADDR into REG directly.
611 .macro leaextq reg, addr, cond=
613 ldr\cond \reg, .L$_leaextq$\@
616 ldr\cond \reg, [pc, \reg]
619 ldr\cond \reg, [\reg]
624 .word \addr(GOT_PREL) + (. - .L$_leaextq_pc$\@ - .L$_pcoff)
627 ldr\cond \reg, =\addr
632 // Set VZ (default q15) to zero.
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.
640 .error "shift quantity must be whole number of bytes"
642 vext.8 \vd, \vz, \vn, #16 - (\nbit >> 3)
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.
649 .error "shift quantity must be whole number of bytes"
651 vext.8 \vd, \vn, \vz, #\nbit >> 3
654 // Apply decoration decor to register name reg.
655 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
657 // Internal macros: `_REGFORM_r(decor)' applies decoration decor to register
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)
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)
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)
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)
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.
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
784 // Return the register number of the pair containing register n, i.e.,
786 #define _PAIR(n) _GLUE(_PAIR_, n)
788 // Internal macros: `_PAIR_n' returns the register number of the pair
789 // containing register n, i.e., floor(n/2).
823 // Apply decoration decor to register number n of type ty. Decorations are
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)
840 // Internal macros: `_DECOR_ty_decor(n)' applies decoration decor to register
841 // number n of type ty.
843 #define _DECOR_s_Q(n) GLUE(q, _PAIR(_PAIR(n)))
844 #define _DECOR_s_D(n) GLUE(d, _PAIR(n))
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))
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]
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)
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)
900 // Macros for converting vldm/vstm ranges.
901 #define QQ(qlo, qhi) D0(qlo)-D1(qhi)
903 // Stack management and unwinding.
904 .macro setfp fp=r11, offset=0
909 add \fp, sp, #\offset
910 .setfp \fp, sp, #\offset
912 .macro dropfp; _dropfp \fp, \offset; .endm
916 .macro _dropfp fp, offset=0
920 sub sp, \fp, #\offset
936 .macro pushreg rr:vararg
941 .macro popreg rr:vararg
945 .macro pushvfp rr:vararg
950 .macro popvfp rr:vararg
957 // No need for prologue markers on ARM.
958 #define FUNC_POSTHOOK(_) .L$_prologue_p = -1
962 ///--------------------------------------------------------------------------
963 /// AArch64-specific hacking.
967 // Set the function hooks.
968 #define FUNC_PREHOOK(_) .balign 4
969 #define FUNC_POSTHOOK(_) .cfi_startproc; .L$_prologue_p = -1
970 #define ENDFUNC_HOOK(_) .cfi_endproc
972 // Call external subroutine at ADDR, possibly via PLT.
977 // Load address of external symbol ADDR into REG.
978 .macro leaext reg, addr
980 adrp \reg, :got:\addr
981 ldr \reg, [\reg, #:got_lo12:\addr]
984 add \reg, \reg, #:lo12:\addr
989 // Set VZ (default v31) to zero.
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.
997 .error "shift quantity must be whole number of bytes"
999 ext \vd\().16b, \vz\().16b, \vn\().16b, #16 - (\nbit >> 3)
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.
1006 .error "shift quantity must be whole number of bytes"
1008 ext \vd\().16b, \vn\().16b, \vz\().16b, #\nbit >> 3
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.
1018 .cfi_def_cfa_register \fp
1020 add \fp, sp, #\offset
1021 .cfi_def_cfa_register \fp
1022 .cfi_adjust_cfa_offset -\offset
1024 .macro dropfp; _dropfp \fp, \offset; .endm
1028 .macro _dropfp fp, offset=0
1031 .cfi_def_cfa_register sp
1033 sub sp, \fp, #\offset
1034 .cfi_def_cfa_register sp
1035 .cfi_adjust_cfa_offset +\offset
1043 .cfi_adjust_cfa_offset +\n
1048 .cfi_adjust_cfa_offset -\n
1051 .macro pushreg x, y=nil
1054 .cfi_adjust_cfa_offset +16
1055 .cfi_rel_offset \x, 0
1057 stp \x, \y, [sp, #-16]!
1058 .cfi_adjust_cfa_offset +16
1059 .cfi_rel_offset \x, 0
1060 .cfi_rel_offset \y, 8
1064 .macro popreg x, y=nil
1068 .cfi_adjust_cfa_offset -16
1070 ldp \x, \y, [sp], #16
1073 .cfi_adjust_cfa_offset -16
1077 .macro savereg x, y, z=nil
1080 .cfi_rel_offset \x, \y
1082 stp \x, \y, [sp, #\z]
1083 .cfi_rel_offset \x, \z
1084 .cfi_rel_offset \y, \z + 8
1088 .macro rstrreg x, y, z=nil
1093 ldp \x, \y, [sp, #\z]
1104 ///--------------------------------------------------------------------------
1107 // Default values for the various hooks.
1108 #ifndef FUNC_PREHOOK
1109 # define FUNC_PREHOOK(_)
1111 #ifndef FUNC_POSTHOOK
1112 # define FUNC_POSTHOOK(_)
1114 #ifndef ENDFUNC_HOOK
1115 # define ENDFUNC_HOOK(_)
1119 # define F(name) name
1123 # define TYPE_FUNC(name)
1127 # define SIZE_OBJ(name)
1130 #if __ELF__ && !defined(WANT_EXECUTABLE_STACK)
1131 .pushsection .note.GNU-stack, "", _SECTTY(progbits)
1135 ///----- That's all, folks --------------------------------------------------