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Code Issues Releases Wiki Activity

更改系统调用的寄存器传参顺序 (#409)

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This commit is contained in:
LoGin
2023-10-24 16:40:49 +08:00
committed by GitHub
parent 40314b30ab
commit f4082b86b1
16 changed files with 50 additions and 56 deletions
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20
user/libs/libsystem/syscall.c
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@ -1,23 +1,21 @@
#include "syscall.h"
#include <stdio.h>
#include <errno.h>
long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, uint64_t arg7)
long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5)
{
uint64_t __err_code;
__asm__ __volatile__(
"movq %2, %%r8 \n\t"
"movq %3, %%r9 \n\t"
"movq %4, %%r10 \n\t"
"movq %5, %%r11 \n\t"
"movq %6, %%r12 \n\t"
"movq %7, %%r13 \n\t"
"movq %8, %%r14 \n\t"
"movq %9, %%r15 \n\t"
"movq %2, %%rdi \n\t"
"movq %3, %%rsi \n\t"
"movq %4, %%rdx \n\t"
"movq %5, %%r10 \n\t"
"movq %6, %%r8 \n\t"
"movq %7, %%r9 \n\t"
"int $0x80 \n\t"
"movq %%rax, %0 \n\t"
:"=a"(__err_code)
: "a"(syscall_id), "m"(arg0), "m"(arg1), "m"(arg2), "m"(arg3), "m"(arg4), "m"(arg5), "m"(arg6), "m"(arg7)
: "memory", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "rcx", "rdx");
: "a"(syscall_id), "m"(arg0), "m"(arg1), "m"(arg2), "m"(arg3), "m"(arg4), "m"(arg5)
: "memory", "r8", "r9", "r10", "r11", "rcx", "rdx", "rdi", "rsi");
// printf("errcode = %#018lx\n", __err_code);
errno = __err_code;

5
user/libs/libsystem/syscall.h
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@ -63,9 +63,6 @@
* @param arg3
* @param arg4
* @param arg5
* @param arg6
* @param arg7
* @return long
*/
long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4,
uint64_t arg5, uint64_t arg6, uint64_t arg7);
long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5);