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| author | Dmitry Chagin <dchagin@FreeBSD.org> | 2022-05-15 18:00:05 +0000 |
|---|---|---|
| committer | Dmitry Chagin <dchagin@FreeBSD.org> | 2022-05-15 18:00:05 +0000 |
| commit | ba279bcd6d75aa236bcb9ccf11aeb6f51a2f8514 (patch) | |
| tree | e1ef02648330c782f560b33cbcb60cb5bdc8b819 /sys/amd64/linux/linux_sysvec.c | |
| parent | 0b5d5dc3767fcf2f0198f0f9549cb23983e0ee3e (diff) | |
| download | src-ba279bcd6d75aa236bcb9ccf11aeb6f51a2f8514.tar.gz src-ba279bcd6d75aa236bcb9ccf11aeb6f51a2f8514.zip | |
linux(4): Cleanup signal trampolines
This is the first stage of a signal trampolines refactoring.
From trampolines retired emulation of the 'call' instruction, which is
replaced by direct call of a signal handler. The signal handler address
is in the register.
The previous trampoline implemenatation used semi-Linux-way to call
a signal handler via the 'jmp' instruction. Wherefore the trampoline
emulated a 'call' instruction to into the stack the return address for
signal handler's 'ret' instruction. Wherefore handmade DWARD annotations
was used.
While here rephrased and removed excessive comments.
MFC after: 2 weeks
Diffstat (limited to 'sys/amd64/linux/linux_sysvec.c')
| -rw-r--r-- | sys/amd64/linux/linux_sysvec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/linux/linux_sysvec.c b/sys/amd64/linux/linux_sysvec.c index 1ea274da8935..ea91dcae5d49 100644 --- a/sys/amd64/linux/linux_sysvec.c +++ b/sys/amd64/linux/linux_sysvec.c @@ -686,10 +686,10 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) regs->tf_rax = 0; regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */ regs->tf_rdx = (register_t)&sfp->sf_sc; /* arg 3 in %rdx */ + regs->tf_rcx = (register_t)catcher; /* Fill in POSIX parts. */ siginfo_to_lsiginfo(&ksi->ksi_info, &sf.sf_si, sig); - sf.sf_handler = catcher; mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); |