Ruben Ayrapetyan
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* Copyright 2014 Samsung Electronics Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LINUX_X86_ASM_H
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#define LINUX_X86_ASM_H
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FIXME(Implement x86 ABI);
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#error "Not implemented"
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/*
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* mov syscall_no -> %rax
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* mov arg1 -> %rdi
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* syscall
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* mov %rax -> ret
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*/
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#define SYSCALL_1 (syscall_no, arg1, ret) \
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__asm ("syscall" \
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: "=a" (ret) \
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: "a" (syscall_no), "D" (arg1) \
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: "rcx", "r11");
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/*
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* mov syscall_no -> %rax
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* mov arg1 -> %rdi
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* mov arg2 -> %rsi
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* syscall
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* mov %rax -> ret
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*/
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#define SYSCALL_2 (syscall_no, arg1, arg2, ret) \
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__asm ("syscall" \
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: "=a" (ret) \
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: "a" (syscall_no), "D" (arg1), "S" (arg2) \
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: "rcx", "r11");
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/*
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* mov syscall_no -> %rax
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* mov arg1 -> %rdi
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* mov arg2 -> %rsi
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* mov arg2 -> %rdx
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* syscall
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* mov %rax -> ret
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*/
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#define SYSCALL_3 (syscall_no, arg1, arg2, arg3, ret) \
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__asm ("syscall" \
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: "=a" (ret) \
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: "a" (syscall_no), "D" (arg1), "S" (arg2), "d" (arg3) \
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: "rcx", "r11");
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#define _START \
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mov (%rsp), %rdi; \
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mov %rsp, %rsi; \
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add $8, %rsi; \
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callq main; \
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\
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mov %rax, %rdi; \
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callq __exit;
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#endif /* !LINUX_X86_ASM_H */
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