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linux: fix sigaltstack on amd64

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To determine whether to use alternate signal stack or not,
we need to use the native signal number, not the one translated
with bsd_to_linux_signal().

In practical terms, this fixes golang.

Reviewed By:	dchagin
Fixes:		135dd0cab5
Sponsored By:	EPSRC
Differential Revision:	https://reviews.freebsd.org/D31298
This commit is contained in:
Edward Tomasz Napierala 2021-07-26 11:57:47 +01:00
parent ccc510b463
commit b54838003c
1 changed files with 3 additions and 3 deletions
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6
sys/amd64/linux/linux_sysvec.c
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@ -630,9 +630,6 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
LINUX_CTR4(rt_sendsig, "%p, %d, %p, %u",
catcher, sig, mask, code);
/* Translate the signal. */
sig = bsd_to_linux_signal(sig);
/* Save user context. */
bzero(&sf, sizeof(sf));
bsd_to_linux_sigset(mask, &sf.sf_sc.uc_sigmask);
@ -676,6 +673,9 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
/* Align to 16 bytes. */
sfp = (struct l_rt_sigframe *)((unsigned long)sp & ~0xFul);
/* Translate the signal. */
sig = bsd_to_linux_signal(sig);
/* Build the argument list for the signal handler. */
regs->tf_rdi = sig; /* arg 1 in %rdi */
regs->tf_rax = 0;