44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#include <stdint.h>
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#include "syscall.h"
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#include "cpu.h"
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#include "intr.h"
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#include "syscall/syscall.h"
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#include "proc/proc.h"
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#include "kprintf.h"
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#include "errors.h"
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extern void hal_enable_syscallentry(void);
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extern void hal_syscallentry(void);
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void hal_syscalldispatch(IntrStackFrame *frame) {
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uint64_t sysnum = frame->regs.rax;
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if (sysnum < SYSCALLS_MAX) {
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SyscallFn fn = SYSCALL_TABLE[sysnum];
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if (fn == NULL) {
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frame->regs.rax = E_BADSYSCALL;
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return;
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}
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int32_t ret = fn(frame->regs.rdi, frame->regs.rsi, frame->regs.rdx,
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frame->regs.r10, frame->regs.r8, frame->regs.r9);
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if (sysnum == SYS_QUITPROC) {
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proc_sched((void *)frame);
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}
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frame->regs.rax = *(uint64_t *)&ret;
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}
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}
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void hal_syscall_init(void) {
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hal_cpu_init(0);
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LocalCpuData *lcd = &HAL_CPUS[0];
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hal_cpu_wrmsr(HAL_CPU_EFER, hal_cpu_rdmsr(HAL_CPU_EFER) | 0x1);
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hal_enable_syscallentry();
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hal_cpu_wrmsr(HAL_CPU_GSBASE, (uint64_t)lcd);
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hal_cpu_wrmsr(HAL_CPU_KGSBASE, (uint64_t)lcd);
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hal_cpu_wrmsr(HAL_CPU_SFMASK, (uint64_t)0);
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hal_cpu_wrmsr(HAL_CPU_LSTAR, (uint64_t)&hal_syscallentry);
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}
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