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fix userspace?

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assada
2025-01-31 16:38:38 +01:00
parent ad929efeb2
commit 79a4f79a24
7 changed files with 149 additions and 62 deletions
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35
syscall.c
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@@ -7,26 +7,31 @@
#include "tty.h"
#include "timer.h"
#include "rtc.h"
#define NB_SYSCALL 3
#include "shell.h"
#define NB_SYSCALL 7
void *syscalls[NB_SYSCALL] = {
keyboard_getchar,
get_rtc_time,
sys_halt};
sys_halt,
terminal_printf,
delay,
terminal_clear,
shell_init
};
void syscall_handler(Stack *registers)
{
if ((registers->cs & 0x3) != 0x3) return;
int sys_index = registers->eax;
if (sys_index >= NB_SYSCALL)
return;
if (sys_index >= NB_SYSCALL) return;
void *function = syscalls[sys_index];
int ret;
asm volatile(" push %1; \
int ret;
asm volatile("sti");
asm volatile (" push %1; \
push %2; \
push %3; \
push %4; \
@@ -37,10 +42,14 @@ void syscall_handler(Stack *registers)
pop %%ebx; \
pop %%ebx; \
pop %%ebx; \
" : "=a"(ret) : "r"(registers->edi), "r"(registers->esi),
"r"(registers->edx), "r"(registers->ecx),
"r"(registers->ebx), "r"(function));
registers->eax = ret;
" : "=a" (ret) :
"r" (registers->edi), "r" (registers->esi),
"r" (registers->edx), "r" (registers->ecx),
"r" (registers->ebx), "r" (function));
asm volatile("cli");
registers->eax = ret;
}
void syscall_init(void)