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author | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
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committer | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
commit | ace65b453151845bc361f21f3e5b651c35f9f126 (patch) | |
tree | 262ebd29b0ca1d8584f0b6f1efa7a00d9f4f3e43 /arch/x86_64/syscall_entry.c | |
parent | f004c1ade8d617a82cea2fe249434cccb47a2358 (diff) | |
download | jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.gz jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.bz2 jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.zip |
Diffstat (limited to 'arch/x86_64/syscall_entry.c')
-rw-r--r-- | arch/x86_64/syscall_entry.c | 25 |
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))); +} |