diff options
Diffstat (limited to 'comm/third_party/libgcrypt/cipher/asm-common-amd64.h')
| -rw-r--r-- | comm/third_party/libgcrypt/cipher/asm-common-amd64.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/cipher/asm-common-amd64.h b/comm/third_party/libgcrypt/cipher/asm-common-amd64.h new file mode 100644 index 0000000000..9d4a028a04 --- /dev/null +++ b/comm/third_party/libgcrypt/cipher/asm-common-amd64.h @@ -0,0 +1,189 @@ +/* asm-common-amd64.h - Common macros for AMD64 assembly + * + * Copyright (C) 2018 Jussi Kivilinna <jussi.kivilinna@iki.fi> + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef GCRY_ASM_COMMON_AMD64_H +#define GCRY_ASM_COMMON_AMD64_H + +#include <config.h> + +#ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS +# define ELF(...) __VA_ARGS__ +#else +# define ELF(...) /*_*/ +#endif + +#ifdef __PIC__ +# define rRIP (%rip) +#else +# define rRIP +#endif + +#ifdef __PIC__ +# define RIP %rip +#else +# define RIP +#endif + +#ifdef __PIC__ +# define ADD_RIP +rip +#else +# define ADD_RIP +#endif + +#if defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS) || !defined(__PIC__) +# define GET_EXTERN_POINTER(name, reg) movabsq $name, reg +#else +# ifdef __code_model_large__ +# define GET_EXTERN_POINTER(name, reg) \ + pushq %r15; \ + pushq %r14; \ + 1: leaq 1b(%rip), reg; \ + movabsq $_GLOBAL_OFFSET_TABLE_-1b, %r14; \ + movabsq $name@GOT, %r15; \ + addq %r14, reg; \ + popq %r14; \ + movq (reg, %r15), reg; \ + popq %r15; +# else +# define GET_EXTERN_POINTER(name, reg) movq name@GOTPCREL(%rip), reg +# endif +#endif + +#ifdef HAVE_GCC_ASM_CFI_DIRECTIVES +/* CFI directives to emit DWARF stack unwinding information. */ +# define CFI_STARTPROC() .cfi_startproc +# define CFI_ENDPROC() .cfi_endproc +# define CFI_REMEMBER_STATE() .cfi_remember_state +# define CFI_RESTORE_STATE() .cfi_restore_state +# define CFI_ADJUST_CFA_OFFSET(off) .cfi_adjust_cfa_offset off +# define CFI_REL_OFFSET(reg,off) .cfi_rel_offset reg, off +# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg +# define CFI_REGISTER(ro,rn) .cfi_register ro, rn +# define CFI_RESTORE(reg) .cfi_restore reg + +# define CFI_PUSH(reg) \ + CFI_ADJUST_CFA_OFFSET(8); CFI_REL_OFFSET(reg, 0) +# define CFI_POP(reg) \ + CFI_ADJUST_CFA_OFFSET(-8); CFI_RESTORE(reg) +# define CFI_POP_TMP_REG() \ + CFI_ADJUST_CFA_OFFSET(-8); +# define CFI_LEAVE() \ + CFI_ADJUST_CFA_OFFSET(-8); CFI_DEF_CFA_REGISTER(%rsp) + +/* CFA expressions are used for pointing CFA and registers to + * %rsp relative offsets. */ +# define DW_REGNO_rax 0 +# define DW_REGNO_rdx 1 +# define DW_REGNO_rcx 2 +# define DW_REGNO_rbx 3 +# define DW_REGNO_rsi 4 +# define DW_REGNO_rdi 5 +# define DW_REGNO_rbp 6 +# define DW_REGNO_rsp 7 +# define DW_REGNO_r8 8 +# define DW_REGNO_r9 9 +# define DW_REGNO_r10 10 +# define DW_REGNO_r11 11 +# define DW_REGNO_r12 12 +# define DW_REGNO_r13 13 +# define DW_REGNO_r14 14 +# define DW_REGNO_r15 15 + +# define DW_REGNO(reg) DW_REGNO_ ## reg + +/* Fixed length encoding used for integers for now. */ +# define DW_SLEB128_7BIT(value) \ + 0x00|((value) & 0x7f) +# define DW_SLEB128_28BIT(value) \ + 0x80|((value)&0x7f), \ + 0x80|(((value)>>7)&0x7f), \ + 0x80|(((value)>>14)&0x7f), \ + 0x00|(((value)>>21)&0x7f) + +# define CFI_CFA_ON_STACK(rsp_offs,cfa_depth) \ + .cfi_escape \ + 0x0f, /* DW_CFA_def_cfa_expression */ \ + DW_SLEB128_7BIT(11), /* length */ \ + 0x77, /* DW_OP_breg7, rsp + constant */ \ + DW_SLEB128_28BIT(rsp_offs), \ + 0x06, /* DW_OP_deref */ \ + 0x23, /* DW_OP_plus_constu */ \ + DW_SLEB128_28BIT((cfa_depth)+8) + +# define CFI_REG_ON_STACK(reg,rsp_offs) \ + .cfi_escape \ + 0x10, /* DW_CFA_expression */ \ + DW_SLEB128_7BIT(DW_REGNO(reg)), \ + DW_SLEB128_7BIT(5), /* length */ \ + 0x77, /* DW_OP_breg7, rsp + constant */ \ + DW_SLEB128_28BIT(rsp_offs) + +#else +# define CFI_STARTPROC() +# define CFI_ENDPROC() +# define CFI_REMEMBER_STATE() +# define CFI_RESTORE_STATE() +# define CFI_ADJUST_CFA_OFFSET(off) +# define CFI_REL_OFFSET(reg,off) +# define CFI_DEF_CFA_REGISTER(reg) +# define CFI_REGISTER(ro,rn) +# define CFI_RESTORE(reg) + +# define CFI_PUSH(reg) +# define CFI_POP(reg) +# define CFI_POP_TMP_REG() +# define CFI_LEAVE() + +# define CFI_CFA_ON_STACK(rsp_offs,cfa_depth) +# define CFI_REG_ON_STACK(reg,rsp_offs) +#endif + +#ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS +# define ENTER_SYSV_FUNC_PARAMS_0_4 \ + pushq %rdi; \ + CFI_PUSH(%rdi); \ + pushq %rsi; \ + CFI_PUSH(%rsi); \ + movq %rcx, %rdi; \ + movq %rdx, %rsi; \ + movq %r8, %rdx; \ + movq %r9, %rcx; \ + +# define ENTER_SYSV_FUNC_PARAMS_5 \ + ENTER_SYSV_FUNC_PARAMS_0_4; \ + movq 0x38(%rsp), %r8; + +# define ENTER_SYSV_FUNC_PARAMS_6 \ + ENTER_SYSV_FUNC_PARAMS_5; \ + movq 0x40(%rsp), %r9; + +# define EXIT_SYSV_FUNC \ + popq %rsi; \ + CFI_POP(%rsi); \ + popq %rdi; \ + CFI_POP(%rdi); +#else +# define ENTER_SYSV_FUNC_PARAMS_0_4 +# define ENTER_SYSV_FUNC_PARAMS_5 +# define ENTER_SYSV_FUNC_PARAMS_6 +# define EXIT_SYSV_FUNC +#endif + +#endif /* GCRY_ASM_COMMON_AMD64_H */ |