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Code Issues Releases Wiki Activity

🆕 lseek系统调用

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This commit is contained in:
fslongjin
2022-05-03 15:40:23 +08:00
parent f99179014a
commit 2ed8bdcfd2
6 changed files with 120 additions and 10 deletions
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38
kernel/process/process.c
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@ -8,6 +8,7 @@
#include <mm/slab.h>
#include <sched/sched.h>
#include <filesystem/fat32/fat32.h>
#include <common/stdio.h>
extern void system_call(void);
extern void kernel_thread_func(void);
@ -142,6 +143,43 @@ void user_level_function()
addr = (uint64_t)&test1;
count = 19;
__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"
"int $0x80 \n\t"
: "=a"(err_code)
: "a"(SYS_WRITE), "m"(fd_num), "m"(addr), "m"(count), "m"(zero), "m"(zero), "m"(zero), "m"(zero), "m"(zero)
: "memory", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "rcx", "rdx");
addr = 1;
count = SEEK_SET;
fd_num = 0;
// Test lseek
__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"
"int $0x80 \n\t"
: "=a"(err_code)
: "a"(SYS_LSEEK), "m"(fd_num), "m"(addr), "m"(count), "m"(zero), "m"(zero), "m"(zero), "m"(zero), "m"(zero)
: "memory", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "rcx", "rdx");
// SYS_WRITE
char test2[] = "K123456789K";
addr = (uint64_t)&test2;
count = 11;
__asm__ __volatile__(
"movq %2, %%r8 \n\t"
"movq %3, %%r9 \n\t"