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29 lines
1020 B
C
29 lines
1020 B
C
#include "syscall.h"
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#include <libc/stdio.h>
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#include <libc/errno.h>
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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)
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{
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uint64_t err_code;
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__asm__ __volatile__(
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"movq %2, %%r8 \n\t"
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"movq %3, %%r9 \n\t"
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"movq %4, %%r10 \n\t"
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"movq %5, %%r11 \n\t"
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"movq %6, %%r12 \n\t"
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"movq %7, %%r13 \n\t"
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"movq %8, %%r14 \n\t"
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"movq %9, %%r15 \n\t"
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"int $0x80 \n\t"
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"movq %%rax, %0 \n\t"
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: "=m"(err_code)
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: "a"(syscall_id), "m"(arg0), "m"(arg1), "m"(arg2), "m"(arg3), "m"(arg4), "m"(arg5), "m"(arg6), "m"(arg7)
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: "memory", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "rcx", "rdx");
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errno = err_code;
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if (syscall_id == SYS_BRK || syscall_id == SYS_OPEN)
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{
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printf("retval = %#018lx\n", (uint64_t)err_code);
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printf("errcode = %d\n", err_code);
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}
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return err_code;
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}
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