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#include "arch/x86_64/processor.h"
#include "syscall/handles.h"
#include "print.h"
#include "lock.h"
#include "error.h"
#include <stddef.h>
static inline int
s_invoke_release(
objdir_t *root_dir,
objdir_entry_t *target,
uint8_t *payload,
size_t payload_at,
int (*invoke)(objdir_t*, objdir_entry_t*, uint8_t*, size_t))
{
int e = invoke(root_dir, target, payload, payload_at);
mtx_release(&target->lock);
return e;
}
int
_syscall_handler_arch(objdir_t *root_dir, objdir_entry_t *target, uint8_t *payload, size_t payload_at)
{
switch(target->type) {
case KO_MEMORY_MAPPING:
return s_invoke_release(root_dir, target, payload, payload_at, syscall_handle_invoke_mapping);
default:
klogf("Missing implementation of invoke for type %i\n", target->type);
mtx_release(&target->lock);
return -KE_BADTYPE;
}
}
__attribute__((naked))
void _syscall_entry(void)
{
__asm__ volatile(" \
pushq %%r11; \
pushq %%rcx; \
swapgs; \
movq %%gs:%c[tcb], %%rax; \
movq %%rsp, %c[sp](%%rax); \
movq %c[ksp](%%rax), %%rsp; \
pushq %c[sp](%%rax); \
callq _syscall_handler; \
swapgs; \
popq %%rsp; \
popq %%rcx; \
popq %%r11; \
sysretq;"
::
[tcb] "i"(offsetof(processor_t, tcb)),
[sp] "i"(offsetof(tcb_t, sp)),
[ksp] "i"(offsetof(tcb_t, ksp)));
}
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