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#include "arch/x86_64/hal/process.h"
#include "arch/x86_64/hal/smp.h"
#include "hal/smp.h"
#include "jove.h"
int
syscall_handler_arch(uint64_t message_path_raw, uint64_t message_pathlen)
{
uint16_t *message_path = (uint16_t*)&message_path_raw;
if(message_pathlen > 4) {
return EBADPATH;
}
processor_t *proc = processor_current();
jove_owned_obj_t *objdir = obj_take(proc->pcb->rootdir);
jove_owned_obj_t *message_obj = objdir_getobj(objdir, message_path, message_pathlen);
if(message_obj == 0) {
obj_release(objdir);
return errno;
}
return 0;
}
__attribute__((naked))
void _syscall_entry(void)
{
__asm__ volatile(" \
swapgs; \
movq %%gs:%c[pcb], %%rax; \
movq %%rsp, %%rdx; \
movq %c[ksp](%%rax), %%rsp; \
pushq %%rdx; \
pushq %%r11; \
pushq %%rbx; \
pushq %%rcx; \
pushq %%rbp; \
pushq %%r12; \
pushq %%r13; \
pushq %%r14; \
pushq %%r15; \
callq syscall_handler_arch; \
swapgs; \
popq %%r15; \
popq %%r14; \
popq %%r13; \
popq %%r12; \
popq %%rbp; \
popq %%rcx; \
popq %%rbx; \
xorq %%rdx, %%rdx; \
xorq %%rsi, %%rsi; \
xorq %%rdi, %%rdi; \
xorq %%r8, %%r8; \
xorq %%r9, %%r9; \
xorq %%r10, %%r10; \
popq %%rcx; \
popq %%r11; \
popq %%rsp; \
sysretq;"
::
[pcb] "i"(offsetof(processor_t, pcb)),
[ksp] "i"(offsetof(pcb_t, ksp)));
}
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