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Show crash reports on SIGSYS

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This will help make it easier to troubleshoot ABI breakages with on
operating systems that, unlike Linux don't have ironclad guarantees
to not break userspace.
This commit is contained in:
Justine Tunney 2022-06-23 13:01:01 -07:00
parent a4601a24d3
commit 44da16255a
11 changed files with 83 additions and 19 deletions
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11
libc/sysv/systemfive.S
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@ -164,8 +164,17 @@ systemfive_bsdscrub:
systemfive_bsd:
cmp $0xfff,%ax
je systemfive_enosys
mov %rcx,%r10 # note: we do not create a stack frame
mov %rcx,%r10
push %rbx
push 32(%rsp)
push 24(%rsp)
push 16(%rsp)
mov %rax,%rbx # save ordinal for SIGSYS crash report
syscall # bsd will need arg on stack sometimes
pop %rbx
pop %rbx
pop %rbx
pop %rbx
jc systemfive_errno # bsd sets carry flag if %rax is errno
ret
.endfn systemfive_bsd