GNU bug report logs - #63334
[PATCH] Add hurd-amd64 support

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Samuel Thibault <samuel.thibault <at> gnu.org>
To: bug-grep <at> gnu.org
Subject: [PATCH] Add hurd-amd64 support
Date: Sat, 6 May 2023 21:06:24 +0200

This adds SIGSEGV_FAULT_STACKPOINTER for the hurd-amd64 case

--- ./lib/sigsegv.c.original	2023-05-05 10:45:54.673751100 +0000
+++ ./lib/sigsegv.c	2023-05-05 10:48:47.903577554 +0000
@@ -351,6 +351,17 @@
    "old esp, if trapped from user".  */
 #  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_uesp
 
+# elif defined __x86_64__
+
+/* scp points to a 'struct sigcontext' (defined in
+   glibc/sysdeps/mach/hurd/x86_64/bits/sigcontext.h).
+   The registers of this struct get pushed on the stack through
+   gnumach/x86_64/i386/locore.S:trapall.  */
+/* Both sc_rsp and sc_ursp appear to have the same value.
+   It appears more reliable to use sc_ursp because it is labelled as
+   "old rsp, if trapped from user".  */
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_ursp
+
 # endif
 
 #endif

Message #10 received at 63334-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Samuel Thibault <samuel.thibault <at> gnu.org>
Cc: 63334-done <at> debbugs.gnu.org
Subject: Re: [PATCH] Add hurd-amd64 support
Date: Fri, 13 Dec 2024 17:46:16 -0700

Re <https://bugs.gnu.org/63334>: Thanks for the bug report. That bug was 
fixed in Gnulib and the fix folded into grep. Closing the report.

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