mirror of
https://github.com/google/pebble.git
synced 2025-03-19 02:21:21 +00:00
188 lines
4 KiB
C
188 lines
4 KiB
C
/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ASM_X64_H
|
|
#define ASM_X64_H
|
|
|
|
/*
|
|
* mov syscall_no (%rdi) -> %rax
|
|
* syscall
|
|
*/
|
|
#define SYSCALL_0 \
|
|
mov %rdi, %rax; \
|
|
syscall; \
|
|
ret;
|
|
|
|
/*
|
|
* mov syscall_no (%rdi) -> %rax
|
|
* mov arg1 (%rsi) -> %rdi
|
|
* syscall
|
|
*/
|
|
#define SYSCALL_1 \
|
|
mov %rdi, %rax; \
|
|
mov %rsi, %rdi; \
|
|
syscall; \
|
|
ret;
|
|
|
|
/*
|
|
* mov syscall_no (%rdi) -> %rax
|
|
* mov arg1 (%rsi) -> %rdi
|
|
* mov arg2 (%rdx) -> %rsi
|
|
* syscall
|
|
*/
|
|
#define SYSCALL_2 \
|
|
mov %rdi, %rax; \
|
|
mov %rsi, %rdi; \
|
|
mov %rdx, %rsi; \
|
|
syscall; \
|
|
ret;
|
|
|
|
/*
|
|
* mov syscall_no (%rdi) -> %rax
|
|
* mov arg1 (%rsi) -> %rdi
|
|
* mov arg2 (%rdx) -> %rsi
|
|
* mov arg3 (%rcx) -> %rdx
|
|
* syscall
|
|
*/
|
|
#define SYSCALL_3 \
|
|
mov %rdi, %rax; \
|
|
mov %rsi, %rdi; \
|
|
mov %rdx, %rsi; \
|
|
mov %rcx, %rdx; \
|
|
syscall; \
|
|
ret;
|
|
|
|
/*
|
|
* mov argc ([%rsp]) -> %rdi
|
|
* mov argv (%rsp + 0x8) -> %rsi
|
|
*
|
|
* call main
|
|
*
|
|
* mov main_ret (%rax) -> %rdi
|
|
* call exit
|
|
*
|
|
* infinite loop
|
|
*/
|
|
#define _START \
|
|
mov (%rsp), %rdi; \
|
|
mov %rsp, %rsi; \
|
|
add $8, %rsi; \
|
|
callq main; \
|
|
\
|
|
mov %rax, %rdi; \
|
|
callq exit; \
|
|
1: \
|
|
jmp 1b
|
|
|
|
/*
|
|
* setjmp
|
|
*
|
|
* According to x86_64 System V ABI, the following registers are
|
|
* callee-saved, and so need to be stored in context:
|
|
* - %rbp
|
|
* - %rbx
|
|
* - %r12
|
|
* - %r13
|
|
* - %r14
|
|
* - %r15
|
|
* - x87 control word
|
|
*
|
|
* Also, we should store:
|
|
* - %rsp (stack pointer)
|
|
* - return address (to jump to upon longjmp)
|
|
*
|
|
* mov return_address ([%rsp]) -> %rax
|
|
*
|
|
* mov %rsp -> jmp_buf_0 ([%rdi + 0x0])
|
|
* mov %rax -> jmp_buf_8 ([%rdi + 0x8])
|
|
* mov %rbp -> jmp_buf_16 ([%rdi + 0x10])
|
|
* mov %rbx -> jmp_buf_24 ([%rdi + 0x18])
|
|
* mov %r12 -> jmp_buf_32 ([%rdi + 0x20])
|
|
* mov %r13 -> jmp_buf_40 ([%rdi + 0x28])
|
|
* mov %r14 -> jmp_buf_48 ([%rdi + 0x30])
|
|
* mov %r15 -> jmp_buf_56 ([%rdi + 0x38])
|
|
* fnstcw -> jmp_buf_64 ([%rdi + 0x40])
|
|
*
|
|
* ret
|
|
*/
|
|
#define _SETJMP \
|
|
mov (%rsp), %rax; \
|
|
\
|
|
mov %rsp, 0x00(%rdi); \
|
|
mov %rax, 0x08(%rdi); \
|
|
mov %rbp, 0x10(%rdi); \
|
|
mov %rbx, 0x18(%rdi); \
|
|
mov %r12, 0x20(%rdi); \
|
|
mov %r13, 0x28(%rdi); \
|
|
mov %r14, 0x30(%rdi); \
|
|
mov %r15, 0x38(%rdi); \
|
|
fnstcw 0x40(%rdi); \
|
|
\
|
|
xor %rax, %rax; \
|
|
\
|
|
ret;
|
|
|
|
/*
|
|
* longjmp
|
|
*
|
|
* See also:
|
|
* _SETJMP
|
|
*
|
|
* mov jmp_buf_0 ([%rdi + 0x0]) -> %rsp
|
|
* mov jmp_buf_8 ([%rdi + 0x8]) -> %rax
|
|
* mov jmp_buf_16 ([%rdi + 0x10]) -> %rbp
|
|
* mov jmp_buf_24 ([%rdi + 0x18]) -> %rbx
|
|
* mov jmp_buf_32 ([%rdi + 0x20]) -> %r12
|
|
* mov jmp_buf_40 ([%rdi + 0x28]) -> %r13
|
|
* mov jmp_buf_48 ([%rdi + 0x30]) -> %r14
|
|
* mov jmp_buf_56 ([%rdi + 0x38]) -> %r15
|
|
* fldcw jmp_buf_64 ([%rdi + 0x40])
|
|
*
|
|
* mov return_address (%rax) -> ([%rsp])
|
|
*
|
|
* mov val (%rsi) -> %rax
|
|
*
|
|
* test (%rax), (%rax)
|
|
* jnz 1f
|
|
* mov $1, %rax
|
|
* 1:
|
|
*
|
|
* ret
|
|
*/
|
|
#define _LONGJMP \
|
|
mov 0x00(%rdi), %rsp; \
|
|
mov 0x08(%rdi), %rax; \
|
|
mov 0x10(%rdi), %rbp; \
|
|
mov 0x18(%rdi), %rbx; \
|
|
mov 0x20(%rdi), %r12; \
|
|
mov 0x28(%rdi), %r13; \
|
|
mov 0x30(%rdi), %r14; \
|
|
mov 0x38(%rdi), %r15; \
|
|
fldcw 0x40(%rdi); \
|
|
\
|
|
mov %rax, (%rsp); \
|
|
\
|
|
mov %rsi, %rax; \
|
|
\
|
|
test %rax, %rax; \
|
|
jnz 1f; \
|
|
mov $1, %rax; \
|
|
1: \
|
|
\
|
|
ret
|
|
|
|
|
|
|
|
#endif /* !ASM_X64_H */
|