CVS commit: src/lib/libc/arch/hppa/sys

["Nick Hudson" <skrll%netbsd.org@localhost>]

Module Name:    src
Committed By:   skrll
Date:           Mon Jun  6 06:32:44 UTC 2022

Modified Files:
        src/lib/libc/arch/hppa/sys: ptrace.S

Log Message:
Save and restore %r19 the "linkage table pointer register" across the call
to __cerror so if the ptrace syscall fails we can call __cerror again with
the correct %r19 value.

Do this even though the call of __cerror doesn't go via the PLT because
__cerror calls __errno which does.

Analysis and fix from Tom Lane in

port-hppa/56864: hppa: ptrace(2) dumps core when returning an error

I changed the location of where %r19 is stored on the stack to follow the
ABI.


To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/lib/libc/arch/hppa/sys/ptrace.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.