diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/sysdep.h')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/sysdep.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/sysdep.h b/REORG.TODO/sysdeps/x86_64/sysdep.h new file mode 100644 index 0000000000..1c52544fa3 --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/sysdep.h @@ -0,0 +1,169 @@ +/* Assembler macros for x86-64. + Copyright (C) 2001-2017 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/generic/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 + +/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ +#define ALIGNARG(log2) 1<<log2 +#define ASM_SIZE_DIRECTIVE(name) .size name,.-name; + + +/* Define an entry point visible from C. */ +#define ENTRY(name) \ + .globl C_SYMBOL_NAME(name); \ + .type C_SYMBOL_NAME(name),@function; \ + .align ALIGNARG(4); \ + C_LABEL(name) \ + cfi_startproc; \ + CALL_MCOUNT + +#undef END +#define END(name) \ + cfi_endproc; \ + ASM_SIZE_DIRECTIVE(name) + +#define ENTRY_CHK(name) ENTRY (name) +#define END_CHK(name) END (name) + +/* 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 + +/* Since C identifiers are not normally prefixed with an underscore + on this system, the asm identifier `syscall_error' intrudes on the + C name space. Make sure we use an innocuous name. */ +#define syscall_error __syscall_error +#define mcount _mcount + +#define PSEUDO(name, syscall_name, args) \ +lose: \ + jmp JUMPTARGET(syscall_error) \ + .globl syscall_error; \ + ENTRY (name) \ + DO_CALL (syscall_name, args); \ + jb lose + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + END (name) + +#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 + +/* Local label name for asm code. */ +#ifndef L +/* ELF-like local names start with `.L'. */ +# define L(name) .L##name +#endif + +#define atom_text_section .section ".text.atom", "ax" + +/* 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 */ |