| /* Assembler macros for x86-64. |
| Copyright (C) 2001-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library 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. |
| |
| The GNU C Library 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 the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _X86_64_SYSDEP_H |
| #define _X86_64_SYSDEP_H 1 |
| |
| #include <sysdeps/x86/sysdep.h> |
| |
| #ifdef __ASSEMBLER__ |
| |
| /* Syntactic details of assembler. */ |
| |
| /* This macro is for setting proper CFI with DW_CFA_expression describing |
| the register as saved relative to %rsp instead of relative to the CFA. |
| Expression is DW_OP_drop, DW_OP_breg7 (%rsp is register 7), sleb128 offset |
| from %rsp. */ |
| #define cfi_offset_rel_rsp(regn, off) .cfi_escape 0x10, regn, 0x4, 0x13, \ |
| 0x77, off & 0x7F | 0x80, off >> 7 |
| |
| /* If compiled for profiling, call `mcount' at the start of each function. */ |
| #ifdef PROF |
| /* The mcount code relies on a normal frame pointer being on the stack |
| to locate our caller, so push one just for its benefit. */ |
| #define CALL_MCOUNT \ |
| pushq %rbp; \ |
| cfi_adjust_cfa_offset(8); \ |
| movq %rsp, %rbp; \ |
| cfi_def_cfa_register(%rbp); \ |
| call JUMPTARGET(mcount); \ |
| popq %rbp; \ |
| cfi_def_cfa(rsp,8); |
| #else |
| #define CALL_MCOUNT /* Do nothing. */ |
| #endif |
| |
| #define PSEUDO(name, syscall_name, args) \ |
| lose: \ |
| jmp JUMPTARGET(syscall_error) \ |
| .globl syscall_error; \ |
| ENTRY (name) \ |
| DO_CALL (syscall_name, args); \ |
| jb lose |
| |
| #undef JUMPTARGET |
| #ifdef SHARED |
| # ifdef BIND_NOW |
| # define JUMPTARGET(name) *name##@GOTPCREL(%rip) |
| # else |
| # define JUMPTARGET(name) name##@PLT |
| # endif |
| #else |
| /* For static archives, branch to target directly. */ |
| # define JUMPTARGET(name) name |
| #endif |
| |
| /* Long and pointer size in bytes. */ |
| #define LP_SIZE 8 |
| |
| /* Instruction to operate on long and pointer. */ |
| #define LP_OP(insn) insn##q |
| |
| /* Assembler address directive. */ |
| #define ASM_ADDR .quad |
| |
| /* Registers to hold long and pointer. */ |
| #define RAX_LP rax |
| #define RBP_LP rbp |
| #define RBX_LP rbx |
| #define RCX_LP rcx |
| #define RDI_LP rdi |
| #define RDX_LP rdx |
| #define RSI_LP rsi |
| #define RSP_LP rsp |
| #define R8_LP r8 |
| #define R9_LP r9 |
| #define R10_LP r10 |
| #define R11_LP r11 |
| #define R12_LP r12 |
| #define R13_LP r13 |
| #define R14_LP r14 |
| #define R15_LP r15 |
| |
| #else /* __ASSEMBLER__ */ |
| |
| /* Long and pointer size in bytes. */ |
| #define LP_SIZE "8" |
| |
| /* Instruction to operate on long and pointer. */ |
| #define LP_OP(insn) #insn "q" |
| |
| /* Assembler address directive. */ |
| #define ASM_ADDR ".quad" |
| |
| /* Registers to hold long and pointer. */ |
| #define RAX_LP "rax" |
| #define RBP_LP "rbp" |
| #define RBX_LP "rbx" |
| #define RCX_LP "rcx" |
| #define RDI_LP "rdi" |
| #define RDX_LP "rdx" |
| #define RSI_LP "rsi" |
| #define RSP_LP "rsp" |
| #define R8_LP "r8" |
| #define R9_LP "r9" |
| #define R10_LP "r10" |
| #define R11_LP "r11" |
| #define R12_LP "r12" |
| #define R13_LP "r13" |
| #define R14_LP "r14" |
| #define R15_LP "r15" |
| |
| #endif /* __ASSEMBLER__ */ |
| |
| #endif /* _X86_64_SYSDEP_H */ |