make objdir_getlocal return locked object

1 files changed, 57 insertions, 1 deletions

diff --git a/arch/x86_64/sys/syscall.c b/arch/x86_64/sys/syscall.c
index 8cc58bf..4e95225 100644
--- a/arch/x86_64/sys/syscall.c
+++ b/arch/x86_64/sys/syscall.c
@@ -1,7 +1,63 @@
+#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)));
 }