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banan-os/kernel/arch/x86_64/Signal.S

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Kernel/LibC: Add bareboness signals You can now call raise() to raise a signal. Signal handlers are not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
.section .userspace, "aw"
Kernel: Cleanup signal trampoline
2023-07-30 15:58:35 +03:00
#include <sys/syscall.h>
Kernel/LibC: Add bareboness signals You can now call raise() to raise a signal. Signal handlers are not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
.global signal_trampoline
signal_trampoline:
pushq %rax
pushq %rbx
pushq %rcx
pushq %rdx
pushq %rbp
pushq %rdi
pushq %rsi
pushq %r8
pushq %r9
pushq %r10
pushq %r11
pushq %r12
pushq %r13
pushq %r14
pushq %r15
movq 128(%rsp), %rdi
movq 120(%rsp), %rax
call *%rax
Kernel: Cleanup signal trampoline
2023-07-30 15:58:35 +03:00
movq $SYS_SIGNAL_DONE, %rax
movq 128(%rsp), %rbx
int $0x80
Kernel: Userspace signal handlers are now called one at a time I added a syscall for telling the kernel when signal execution has finished. We should send a random hash or id to the signal trampoline that we would include in the syscall, so validity of signal exit can be confirmed.
2023-07-23 13:09:04 +03:00
Kernel/LibC: Add bareboness signals You can now call raise() to raise a signal. Signal handlers are not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
popq %r15
popq %r14
popq %r13
popq %r12
popq %r11
popq %r10
popq %r9
popq %r8
popq %rsi
popq %rdi
popq %rbp
popq %rdx
popq %rcx
popq %rbx
popq %rax
addq $16, %rsp
ret