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Kernel: Change the way we call a syscall in signal_trampoline_dummy

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The function signal_trampoline_dummy was using int 0x82 to call
SC_sigreturn. Since x86 is no longer supported, the correct way
to call a syscall is using the syscall instruction.

This paves the way to remove the syscall trap handling mechanism.
This commit is contained in:
Agustin Gianni 2023-01-25 19:22:35 +00:00 committed by Andrew Kaster
parent 5d7331b4ed
commit e71c320154
Notes: sideshowbarker 2024-07-17 04:09:56 +09:00 
Author: https://github.com/agustingianni
Commit: https://github.com/SerenityOS/serenity/commit/e71c320154
Pull-request: https://github.com/SerenityOS/serenity/pull/17174
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/FireFox317
Reviewed-by: https://github.com/nico
1 changed files with 1 additions and 1 deletions
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2
Kernel/Process.cpp
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@ -413,7 +413,7 @@ void signal_trampoline_dummy()
// Current stack state is just saved_rax, ucontext, signal_info, fpu_state.
// syscall SC_sigreturn
"mov rax, %P0\n"
"int 0x82\n"
"syscall\n"
".globl asm_signal_trampoline_end\n"
"asm_signal_trampoline_end:\n"
".att_syntax"