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
290 # define _DECOR_abcd_r(reg) e##reg##x
291 # define _DECOR_xp_r(reg) e##reg
292 # define _DECOR_ip_r(reg) e##reg
295 # define _DECOR_abcd_r(reg) r##reg##x
296 # define _DECOR_xp_r(reg) r##reg
297 # define _DECOR_ip_r(reg) r##reg
300 // R_r(decor) applies decoration decor to register r, which is an internal
301 // register name. The internal register names are: `ip', `a', `b', `c', `d',
302 // `si', `di', `bp', `sp', `r8'--`r15'.
303 #define R_ip(decor) _DECOR(ip, decor, ip)
304 #define R_a(decor) _DECOR(abcd, decor, a)
305 #define R_b(decor) _DECOR(abcd, decor, b)
306 #define R_c(decor) _DECOR(abcd, decor, c)
307 #define R_d(decor) _DECOR(abcd, decor, d)
308 #define R_si(decor) _DECOR(xp, decor, si)
309 #define R_di(decor) _DECOR(xp, decor, di)
310 #define R_bp(decor) _DECOR(xp, decor, bp)
311 #define R_sp(decor) _DECOR(xp, decor, sp)
313 # define R_r8(decor) _DECOR(rn, decor, r8)
314 # define R_r9(decor) _DECOR(rn, decor, r9)
315 # define R_r10(decor) _DECOR(rn, decor, r10)
316 # define R_r11(decor) _DECOR(rn, decor, r11)
317 # define R_r12(decor) _DECOR(rn, decor, r12)
318 # define R_r13(decor) _DECOR(rn, decor, r13)
319 # define R_r14(decor) _DECOR(rn, decor, r14)
320 # define R_r15(decor) _DECOR(rn, decor, r15)
323 // Refer to an in-memory datum of the type implied by decor residing at
324 // address addr (which should supply its own square-brackets).
325 #define MEM(decor, addr) _DECOR(mem, decor, addr)
327 // Applies decoration decor to assembler-level register name reg.
328 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
330 // Internal macros: _REGFORM_r(decor) applies decoration decor to an
331 // assembler-level register name, in place of any decoration that register
334 #define _REGFORM_ip(decor) R_ip(decor)
335 #define _REGFORM_eip(decor) R_ip(decor)
337 #define _REGFORM_a(decor) R_a(decor)
338 #define _REGFORM_al(decor) R_a(decor)
339 #define _REGFORM_ah(decor) R_a(decor)
340 #define _REGFORM_ax(decor) R_a(decor)
341 #define _REGFORM_eax(decor) R_a(decor)
343 #define _REGFORM_b(decor) R_b(decor)
344 #define _REGFORM_bl(decor) R_b(decor)
345 #define _REGFORM_bh(decor) R_b(decor)
346 #define _REGFORM_bx(decor) R_b(decor)
347 #define _REGFORM_ebx(decor) R_b(decor)
349 #define _REGFORM_c(decor) R_c(decor)
350 #define _REGFORM_cl(decor) R_c(decor)
351 #define _REGFORM_ch(decor) R_c(decor)
352 #define _REGFORM_cx(decor) R_c(decor)
353 #define _REGFORM_ecx(decor) R_c(decor)
355 #define _REGFORM_d(decor) R_d(decor)
356 #define _REGFORM_dl(decor) R_d(decor)
357 #define _REGFORM_dh(decor) R_d(decor)
358 #define _REGFORM_dx(decor) R_d(decor)
359 #define _REGFORM_edx(decor) R_d(decor)
361 #define _REGFORM_si(decor) R_si(decor)
362 #define _REGFORM_sil(decor) R_si(decor)
363 #define _REGFORM_esi(decor) R_si(decor)
365 #define _REGFORM_di(decor) R_di(decor)
366 #define _REGFORM_dil(decor) R_di(decor)
367 #define _REGFORM_edi(decor) R_di(decor)
369 #define _REGFORM_bp(decor) R_bp(decor)
370 #define _REGFORM_bpl(decor) R_bp(decor)
371 #define _REGFORM_ebp(decor) R_bp(decor)
373 #define _REGFORM_sp(decor) R_sp(decor)
374 #define _REGFORM_spl(decor) R_sp(decor)
375 #define _REGFORM_esp(decor) R_sp(decor)
379 # define _REGFORM_rip(decor) R_ip(decor)
380 # define _REGFORM_rsp(decor) R_sp(decor)
381 # define _REGFORM_rbp(decor) R_bp(decor)
382 # define _REGFORM_rdi(decor) R_di(decor)
383 # define _REGFORM_rsi(decor) R_si(decor)
384 # define _REGFORM_rdx(decor) R_d(decor)
385 # define _REGFORM_rcx(decor) R_c(decor)
386 # define _REGFORM_rbx(decor) R_b(decor)
387 # define _REGFORM_rax(decor) R_a(decor)
389 # define _REGFORM_r8(decor) R_r8(decor)
390 # define _REGFORM_r8b(decor) R_r8(decor)
391 # define _REGFORM_r8w(decor) R_r8(decor)
392 # define _REGFORM_r8d(decor) R_r8(decor)
394 # define _REGFORM_r9(decor) R_r9(decor)
395 # define _REGFORM_r9b(decor) R_r9(decor)
396 # define _REGFORM_r9w(decor) R_r9(decor)
397 # define _REGFORM_r9d(decor) R_r9(decor)
399 # define _REGFORM_r10(decor) R_r10(decor)
400 # define _REGFORM_r10b(decor) R_r10(decor)
401 # define _REGFORM_r10w(decor) R_r10(decor)
402 # define _REGFORM_r10d(decor) R_r10(decor)
404 # define _REGFORM_r11(decor) R_r11(decor)
405 # define _REGFORM_r11b(decor) R_r11(decor)
406 # define _REGFORM_r11w(decor) R_r11(decor)
407 # define _REGFORM_r11d(decor) R_r11(decor)
409 # define _REGFORM_r12(decor) R_r12(decor)
410 # define _REGFORM_r12b(decor) R_r12(decor)
411 # define _REGFORM_r12w(decor) R_r12(decor)
412 # define _REGFORM_r12d(decor) R_r12(decor)
414 # define _REGFORM_r13(decor) R_r13(decor)
415 # define _REGFORM_r13b(decor) R_r13(decor)
416 # define _REGFORM_r13w(decor) R_r13(decor)
417 # define _REGFORM_r13d(decor) R_r13(decor)
419 # define _REGFORM_r14(decor) R_r14(decor)
420 # define _REGFORM_r14b(decor) R_r14(decor)
421 # define _REGFORM_r14w(decor) R_r14(decor)
422 # define _REGFORM_r14d(decor) R_r14(decor)
424 # define _REGFORM_r15(decor) R_r15(decor)
425 # define _REGFORM_r15b(decor) R_r15(decor)
426 # define _REGFORM_r15w(decor) R_r15(decor)
427 # define _REGFORM_r15d(decor) R_r15(decor)
431 // Macros for converting register names.
432 #define BYTE(reg) _REGFORM(reg, b)
433 #define HIBYTE(reg) _REGFORM(reg, h)
434 #define WORD(reg) _REGFORM(reg, w)
435 #define DWORD(reg) _REGFORM(reg, d)
437 # define QWORD(reg) _REGFORM(reg, q)
439 #define WHOLE(reg) _REGFORM(reg, r)
441 // Stack management and unwinding.
442 .macro setfp fp
, offset
= 0
446 .cfi_def_cfa_register
\fp
448 #if ABI_WIN && CPUFAM_AMD64
452 lea
\fp
, [R_sp(r
) + \offset
]
454 .cfi_def_cfa_register
\fp
455 .cfi_adjust_cfa_offset
-\offset
457 #if ABI_WIN && CPUFAM_AMD64
458 .seh_setframe
\fp
, \offset
462 .macro dropfp
; _dropfp
\fp
, \offset
; .endm
465 .macro _dropfp fp
, offset
= 0
469 .cfi_def_cfa_register
R_sp(r
)
472 lea
R_sp(r
), [\fp
- \offset
]
474 .cfi_def_cfa_register
R_sp(r
)
475 .cfi_adjust_cfa_offset
+\offset
485 .cfi_adjust_cfa_offset
+\n
487 #if ABI_WIN && CPUFAM_AMD64
495 .cfi_adjust_cfa_offset
-\n
502 .cfi_adjust_cfa_offset
+WORDSZ
503 .cfi_rel_offset
\r, 0
505 #if ABI_WIN && CPUFAM_AMD64
513 .cfi_adjust_cfa_offset
-WORDSZ
518 .macro savexmm r
, offset
519 movdqa
[R_sp(r
) + \offset
], \r
520 #if ABI_WIN && CPUFAM_AMD64
521 .seh_savexmm
\r, \offset
525 .macro rstrxmm r
, offset
526 movdqa
\r, [R_sp(r
) + \offset
]
530 #if ABI_WIN && CPUFAM_AMD64
541 // Stash GP registers and establish temporary stack frame.
560 // Print FMT and the other established arguments.
561 lea eax
, .L$_reg$msg
.\@
601 _reg
.3 "\msg: \r = %08x"
609 pshufd xmm0
, xmm0
, 0x1b
612 _reg
.3 "\msg: \r = %08x %08x %08x %08x"
622 _reg
.3 "\msg: \r = %08x %08x"
630 fldt
[esp
+ 32 + 16*\i
]
633 _reg
.3 "\msg: st(\i) = %.20Lg"
641 fldt
[esp
+ 32 + 16*\i
]
644 _reg
.3 "\msg: st(\i) = %La"
649 ///--------------------------------------------------------------------------
650 /// ARM-specific hacking.
654 // ARM/Thumb mode things. Use ARM by default.
655 #define ARM .arm; .L$_pcoff = 8
656 #define THUMB .thumb; .L$_pcoff = 4
659 // Set the function hooks.
660 #define FUNC_PREHOOK(_) .balign 4; .fnstart
661 #define ENDFUNC_HOOK(_) .fnend; .ltorg
663 // Call external subroutine at ADDR, possibly via PLT.
664 .macro callext addr
, cond
=
672 // Do I need to arrange a spare GOT register?
678 // Maybe load GOT address into GOT.
679 .macro ldgot cond
=, got
=GOTREG
681 ldr\cond \got
, .L$_ldgot$\@
683 add\cond \got
, pc
, \got
687 .word _GLOBAL_OFFSET_TABLE_
- .L$_ldgot_pc$\@
- .L$_pcoff
692 // Load address of external symbol ADDR into REG, maybe using GOT.
693 .macro leaext reg
, addr
, cond
=, got
=GOTREG
695 ldr\cond
\reg
, .L$_leaext$\@
696 ldr\cond
\reg
, [\got
, \reg
]
703 ldr\cond
\reg
, =\addr
707 // Load address of external symbol ADDR into REG directly.
708 .macro leaextq reg
, addr
, cond
=
710 ldr\cond
\reg
, .L$_leaextq$\@
713 ldr\cond
\reg
, [pc
, \reg
]
716 ldr\cond
\reg
, [\reg
]
721 .word
\addr
(GOT_PREL
) + (. - .L$_leaextq_pc$\@
- .L$_pcoff
)
724 ldr\cond
\reg
, =\addr
728 // Apply decoration decor to register name reg.
729 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
731 // Internal macros: `_REGFORM_r(decor)' applies decoration decor to register
734 #define _REGFORM_s0(decor) _DECOR(s, decor, 0)
735 #define _REGFORM_s1(decor) _DECOR(s, decor, 1)
736 #define _REGFORM_s2(decor) _DECOR(s, decor, 2)
737 #define _REGFORM_s3(decor) _DECOR(s, decor, 3)
738 #define _REGFORM_s4(decor) _DECOR(s, decor, 4)
739 #define _REGFORM_s5(decor) _DECOR(s, decor, 5)
740 #define _REGFORM_s6(decor) _DECOR(s, decor, 6)
741 #define _REGFORM_s7(decor) _DECOR(s, decor, 7)
742 #define _REGFORM_s8(decor) _DECOR(s, decor, 8)
743 #define _REGFORM_s9(decor) _DECOR(s, decor, 9)
744 #define _REGFORM_s10(decor) _DECOR(s, decor, 10)
745 #define _REGFORM_s11(decor) _DECOR(s, decor, 11)
746 #define _REGFORM_s12(decor) _DECOR(s, decor, 12)
747 #define _REGFORM_s13(decor) _DECOR(s, decor, 13)
748 #define _REGFORM_s14(decor) _DECOR(s, decor, 14)
749 #define _REGFORM_s15(decor) _DECOR(s, decor, 15)
750 #define _REGFORM_s16(decor) _DECOR(s, decor, 16)
751 #define _REGFORM_s17(decor) _DECOR(s, decor, 17)
752 #define _REGFORM_s18(decor) _DECOR(s, decor, 18)
753 #define _REGFORM_s19(decor) _DECOR(s, decor, 19)
754 #define _REGFORM_s20(decor) _DECOR(s, decor, 20)
755 #define _REGFORM_s21(decor) _DECOR(s, decor, 21)
756 #define _REGFORM_s22(decor) _DECOR(s, decor, 22)
757 #define _REGFORM_s23(decor) _DECOR(s, decor, 23)
758 #define _REGFORM_s24(decor) _DECOR(s, decor, 24)
759 #define _REGFORM_s25(decor) _DECOR(s, decor, 25)
760 #define _REGFORM_s26(decor) _DECOR(s, decor, 26)
761 #define _REGFORM_s27(decor) _DECOR(s, decor, 27)
762 #define _REGFORM_s28(decor) _DECOR(s, decor, 28)
763 #define _REGFORM_s29(decor) _DECOR(s, decor, 29)
764 #define _REGFORM_s30(decor) _DECOR(s, decor, 30)
765 #define _REGFORM_s31(decor) _DECOR(s, decor, 31)
767 #define _REGFORM_d0(decor) _DECOR(d, decor, 0)
768 #define _REGFORM_d1(decor) _DECOR(d, decor, 1)
769 #define _REGFORM_d2(decor) _DECOR(d, decor, 2)
770 #define _REGFORM_d3(decor) _DECOR(d, decor, 3)
771 #define _REGFORM_d4(decor) _DECOR(d, decor, 4)
772 #define _REGFORM_d5(decor) _DECOR(d, decor, 5)
773 #define _REGFORM_d6(decor) _DECOR(d, decor, 6)
774 #define _REGFORM_d7(decor) _DECOR(d, decor, 7)
775 #define _REGFORM_d8(decor) _DECOR(d, decor, 8)
776 #define _REGFORM_d9(decor) _DECOR(d, decor, 9)
777 #define _REGFORM_d10(decor) _DECOR(d, decor, 10)
778 #define _REGFORM_d11(decor) _DECOR(d, decor, 11)
779 #define _REGFORM_d12(decor) _DECOR(d, decor, 12)
780 #define _REGFORM_d13(decor) _DECOR(d, decor, 13)
781 #define _REGFORM_d14(decor) _DECOR(d, decor, 14)
782 #define _REGFORM_d15(decor) _DECOR(d, decor, 15)
783 #define _REGFORM_d16(decor) _DECOR(d, decor, 16)
784 #define _REGFORM_d17(decor) _DECOR(d, decor, 17)
785 #define _REGFORM_d18(decor) _DECOR(d, decor, 18)
786 #define _REGFORM_d19(decor) _DECOR(d, decor, 19)
787 #define _REGFORM_d20(decor) _DECOR(d, decor, 20)
788 #define _REGFORM_d21(decor) _DECOR(d, decor, 21)
789 #define _REGFORM_d22(decor) _DECOR(d, decor, 22)
790 #define _REGFORM_d23(decor) _DECOR(d, decor, 23)
791 #define _REGFORM_d24(decor) _DECOR(d, decor, 24)
792 #define _REGFORM_d25(decor) _DECOR(d, decor, 25)
793 #define _REGFORM_d26(decor) _DECOR(d, decor, 26)
794 #define _REGFORM_d27(decor) _DECOR(d, decor, 27)
795 #define _REGFORM_d28(decor) _DECOR(d, decor, 28)
796 #define _REGFORM_d29(decor) _DECOR(d, decor, 29)
797 #define _REGFORM_d30(decor) _DECOR(d, decor, 30)
798 #define _REGFORM_d31(decor) _DECOR(d, decor, 31)
800 #define _REGFORM_q0(decor) _DECOR(q, decor, 0)
801 #define _REGFORM_q1(decor) _DECOR(q, decor, 1)
802 #define _REGFORM_q2(decor) _DECOR(q, decor, 2)
803 #define _REGFORM_q3(decor) _DECOR(q, decor, 3)
804 #define _REGFORM_q4(decor) _DECOR(q, decor, 4)
805 #define _REGFORM_q5(decor) _DECOR(q, decor, 5)
806 #define _REGFORM_q6(decor) _DECOR(q, decor, 6)
807 #define _REGFORM_q7(decor) _DECOR(q, decor, 7)
808 #define _REGFORM_q8(decor) _DECOR(q, decor, 8)
809 #define _REGFORM_q9(decor) _DECOR(q, decor, 9)
810 #define _REGFORM_q10(decor) _DECOR(q, decor, 10)
811 #define _REGFORM_q11(decor) _DECOR(q, decor, 11)
812 #define _REGFORM_q12(decor) _DECOR(q, decor, 12)
813 #define _REGFORM_q13(decor) _DECOR(q, decor, 13)
814 #define _REGFORM_q14(decor) _DECOR(q, decor, 14)
815 #define _REGFORM_q15(decor) _DECOR(q, decor, 15)
817 // `_LOPART(n)' and `_HIPART(n)' return the numbers of the register halves of
818 // register n, i.e., 2*n and 2*n + 1 respectively.
819 #define _LOPART(n) _GLUE(_LOPART_, n)
820 #define _HIPART(n) _GLUE(_HIPART_, n)
822 // Internal macros: `_LOPART_n' and `_HIPART_n' return the numbers of the
823 // register halves of register n, i.e., 2*n and 2*n + 1 respectively.
845 #define _LOPART_10 20
846 #define _HIPART_10 21
847 #define _LOPART_11 22
848 #define _HIPART_11 23
849 #define _LOPART_12 24
850 #define _HIPART_12 25
851 #define _LOPART_13 26
852 #define _HIPART_13 27
853 #define _LOPART_14 28
854 #define _HIPART_14 29
855 #define _LOPART_15 30
856 #define _HIPART_15 31
858 // Return the register number of the pair containing register n, i.e.,
860 #define _PAIR(n) _GLUE(_PAIR_, n)
862 // Internal macros: `_PAIR_n' returns the register number of the pair
863 // containing register n, i.e., floor(n/2).
897 // Apply decoration decor to register number n of type ty. Decorations are
900 // decor types meaning
901 // Q s, d the NEON qN register containing this one
902 // D s the NEON dN register containing this one
903 // D0 q the low 64-bit half of this one
904 // D1 q the high 64-bit half of this one
905 // S0 d, q the first 32-bit piece of this one
906 // S1 d, q the second 32-bit piece of this one
907 // S2 q the third 32-bit piece of this one
908 // S3 q the fourth 32-bit piece of this one
909 // Bn q the nth byte of this register, as a scalar
910 // Hn q the nth halfword of this register, as a scalar
911 // Wn q the nth word of this register, as a scalar
912 #define _DECOR(ty, decor, n) _DECOR_##ty##_##decor(n)
914 // Internal macros: `_DECOR_ty_decor(n)' applies decoration decor to register
915 // number n of type ty.
917 #define _DECOR_s_Q(n) GLUE(q, _PAIR(_PAIR(n)))
918 #define _DECOR_s_D(n) GLUE(d, _PAIR(n))
920 #define _DECOR_d_Q(n) GLUE(q, _PAIR(n))
921 #define _DECOR_d_S0(n) GLUE(s, _LOPART(n))
922 #define _DECOR_d_S1(n) GLUE(s, _LOPART(n))
924 #define _DECOR_q_D0(n) GLUE(d, _LOPART(n))
925 #define _DECOR_q_D1(n) GLUE(d, _HIPART(n))
926 #define _DECOR_q_S0(n) GLUE(s, _LOPART(_LOPART(n)))
927 #define _DECOR_q_S1(n) GLUE(s, _HIPART(_LOPART(n)))
928 #define _DECOR_q_S2(n) GLUE(s, _LOPART(_HIPART(n)))
929 #define _DECOR_q_S3(n) GLUE(s, _HIPART(_HIPART(n)))
930 #define _DECOR_q_W0(n) GLUE(d, _LOPART(n))[0]
931 #define _DECOR_q_W1(n) GLUE(d, _LOPART(n))[1]
932 #define _DECOR_q_W2(n) GLUE(d, _HIPART(n))[0]
933 #define _DECOR_q_W3(n) GLUE(d, _HIPART(n))[1]
934 #define _DECOR_q_H0(n) GLUE(d, _LOPART(n))[0]
935 #define _DECOR_q_H1(n) GLUE(d, _LOPART(n))[1]
936 #define _DECOR_q_H2(n) GLUE(d, _LOPART(n))[2]
937 #define _DECOR_q_H3(n) GLUE(d, _LOPART(n))[3]
938 #define _DECOR_q_H4(n) GLUE(d, _HIPART(n))[0]
939 #define _DECOR_q_H5(n) GLUE(d, _HIPART(n))[1]
940 #define _DECOR_q_H6(n) GLUE(d, _HIPART(n))[2]
941 #define _DECOR_q_H7(n) GLUE(d, _HIPART(n))[3]
942 #define _DECOR_q_B0(n) GLUE(d, _LOPART(n))[0]
943 #define _DECOR_q_B1(n) GLUE(d, _LOPART(n))[1]
944 #define _DECOR_q_B2(n) GLUE(d, _LOPART(n))[2]
945 #define _DECOR_q_B3(n) GLUE(d, _LOPART(n))[3]
946 #define _DECOR_q_B4(n) GLUE(d, _LOPART(n))[4]
947 #define _DECOR_q_B5(n) GLUE(d, _LOPART(n))[5]
948 #define _DECOR_q_B6(n) GLUE(d, _LOPART(n))[6]
949 #define _DECOR_q_B7(n) GLUE(d, _LOPART(n))[7]
950 #define _DECOR_q_B8(n) GLUE(d, _HIPART(n))[0]
951 #define _DECOR_q_B9(n) GLUE(d, _HIPART(n))[1]
952 #define _DECOR_q_B10(n) GLUE(d, _HIPART(n))[2]
953 #define _DECOR_q_B11(n) GLUE(d, _HIPART(n))[3]
954 #define _DECOR_q_B12(n) GLUE(d, _HIPART(n))[4]
955 #define _DECOR_q_B13(n) GLUE(d, _HIPART(n))[5]
956 #define _DECOR_q_B14(n) GLUE(d, _HIPART(n))[6]
957 #define _DECOR_q_B15(n) GLUE(d, _HIPART(n))[7]
959 // Macros for navigating the NEON register hierarchy.
960 #define S0(reg) _REGFORM(reg, S0)
961 #define S1(reg) _REGFORM(reg, S1)
962 #define S2(reg) _REGFORM(reg, S2)
963 #define S3(reg) _REGFORM(reg, S3)
964 #define D(reg) _REGFORM(reg, D)
965 #define D0(reg) _REGFORM(reg, D0)
966 #define D1(reg) _REGFORM(reg, D1)
967 #define Q(reg) _REGFORM(reg, Q)
969 // Macros for indexing quadword registers.
970 #define QB(reg, i) _REGFORM(reg, B##i)
971 #define QH(reg, i) _REGFORM(reg, H##i)
972 #define QW(reg, i) _REGFORM(reg, W##i)
974 // Macros for converting vldm/vstm ranges.
975 #define QQ(qlo, qhi) D0(qlo)-D1(qhi)
977 // Stack management and unwinding.
978 .macro setfp fp
, offset
= 0
983 add
\fp
, sp
, #\offset
984 .setfp
\fp
, sp
, #\offset
986 .macro dropfp
; _dropfp
\fp
, \offset
; .endm
990 .macro _dropfp fp
, offset
= 0
994 sub sp
, \fp
, #\offset
1010 .macro pushreg rr
:vararg
1015 .macro popreg rr
:vararg
1019 .macro pushvfp rr
:vararg
1024 .macro popvfp rr
:vararg
1031 // No need for prologue markers on ARM.
1032 #define FUNC_POSTHOOK(_) .L$_prologue_p = -1
1036 ///--------------------------------------------------------------------------
1037 /// AArch64-specific hacking.
1041 // Set the function hooks.
1042 #define FUNC_PREHOOK(_) .balign 4
1043 #define FUNC_POSTHOOK(_) .cfi_startproc; .L$_prologue_p = -1
1044 #define ENDFUNC_HOOK(_) .cfi_endproc
1046 // Call external subroutine at ADDR, possibly via PLT.
1051 // Load address of external symbol ADDR into REG.
1052 .macro leaext reg
, addr
1054 adrp
\reg
, :got
:\addr
1055 ldr
\reg
, [\reg
, #:got_lo12:\addr]
1058 add
\reg
, \reg
, #:lo12:\addr
1062 // Stack management and unwinding.
1063 .macro setfp fp
, offset
= 0
1064 // If you're just going through the motions with a fixed-size stack frame,
1065 // then you want to say `add x29, sp, #OFFSET' directly, which will avoid
1066 // pointlessly restoring sp later.
1069 .cfi_def_cfa_register
\fp
1071 add
\fp
, sp
, #\offset
1072 .cfi_def_cfa_register
\fp
1073 .cfi_adjust_cfa_offset
-\offset
1075 .macro dropfp
; _dropfp
\fp
, \offset
; .endm
1079 .macro _dropfp fp
, offset
= 0
1082 .cfi_def_cfa_register sp
1084 sub sp
, \fp
, #\offset
1085 .cfi_def_cfa_register sp
1086 .cfi_adjust_cfa_offset
+\offset
1094 .cfi_adjust_cfa_offset
+\n
1099 .cfi_adjust_cfa_offset
-\n
1102 .macro pushreg x
, y
=
1105 .cfi_adjust_cfa_offset
+16
1106 .cfi_rel_offset \x
, 0
1108 stp \x
, \y
, [sp
, #-16]!
1109 .cfi_adjust_cfa_offset
+16
1110 .cfi_rel_offset \x
, 0
1111 .cfi_rel_offset \y
, 8
1119 .cfi_adjust_cfa_offset
-16
1121 ldp \x
, \y
, [sp
], #16
1124 .cfi_adjust_cfa_offset
-16
1128 .macro savereg x
, y
, z
=
1131 .cfi_rel_offset \x
, \y
1133 stp \x
, \y
, [sp
, #\z]
1134 .cfi_rel_offset \x
, \z
1135 .cfi_rel_offset \y
, \z
+ 8
1139 .macro rstrreg x
, y
, z
=
1144 ldp \x
, \y
, [sp
, #\z]
1155 ///--------------------------------------------------------------------------
1158 // Default values for the various hooks.
1159 #ifndef FUNC_PREHOOK
1160 # define FUNC_PREHOOK(_)
1162 #ifndef FUNC_POSTHOOK
1163 # define FUNC_POSTHOOK(_)
1165 #ifndef ENDFUNC_HOOK
1166 # define ENDFUNC_HOOK(_)
1170 # define F(name) name
1174 # define TYPE_FUNC(name)
1178 # define SIZE_OBJ(name)
1181 #if __ELF__ && !defined(WANT_EXECUTABLE_STACK)
1182 .pushsection
.note
.GNU
-stack
, "", _SECTTY(progbits
)
1186 ///----- That's all, folks --------------------------------------------------