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authorJon Santmyer <jon@jonsantmyer.com>2024-05-22 13:00:41 -0400
committerJon Santmyer <jon@jonsantmyer.com>2024-05-22 13:00:41 -0400
commitace65b453151845bc361f21f3e5b651c35f9f126 (patch)
tree262ebd29b0ca1d8584f0b6f1efa7a00d9f4f3e43 /arch/x86_64/syscall_entry.c
parentf004c1ade8d617a82cea2fe249434cccb47a2358 (diff)
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massive refactor for mp and organizationHEADmaster
Diffstat (limited to 'arch/x86_64/syscall_entry.c')
-rw-r--r--arch/x86_64/syscall_entry.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86_64/syscall_entry.c b/arch/x86_64/syscall_entry.c
new file mode 100644
index 0000000..56dedce
--- /dev/null
+++ b/arch/x86_64/syscall_entry.c
@@ -0,0 +1,25 @@
+#include "arch/processor.h"
+#include "syscall/handler.h"
+
+__attribute__((naked))
+void _syscall_entry()
+{
+ __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)));
+}