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| author | Jon Santmyer <jon@jonsantmyer.com> | 2025-07-30 14:32:01 -0400 |
|---|---|---|
| committer | Jon Santmyer <jon@jonsantmyer.com> | 2025-07-30 14:32:01 -0400 |
| commit | b905869a35f062a4e5072f10bec3a2ba3db0e365 (patch) | |
| tree | 0666691804878857b4bb07daca8a54f5ddb8ae0b /arch/x86_64/syscall.c | |
| download | jove-kernel-b905869a35f062a4e5072f10bec3a2ba3db0e365.tar.gz jove-kernel-b905869a35f062a4e5072f10bec3a2ba3db0e365.tar.bz2 jove-kernel-b905869a35f062a4e5072f10bec3a2ba3db0e365.zip | |
working userland with some invoke syscalls
Diffstat (limited to 'arch/x86_64/syscall.c')
| -rw-r--r-- | arch/x86_64/syscall.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86_64/syscall.c b/arch/x86_64/syscall.c new file mode 100644 index 0000000..a563525 --- /dev/null +++ b/arch/x86_64/syscall.c @@ -0,0 +1,25 @@ +#include "arch/x86_64/processor.h" +#include <stddef.h> + +__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))); +} |