new file mode 100644
@@ -0,0 +1,58 @@
+From 6f2f006185cdeeda997d19d651379bfc6887e394 Mon Sep 17 00:00:00 2001
+From: Joel Stanley <joel@jms.id.au>
+Date: Mon, 6 Jun 2022 17:14:12 +0930
+Subject: [PATCH] sigsegv: Add support for Linux/PowerPC (32-bit) with musl
+ libc. Reported by Khem Raj <raj.khem@gmail.com> in
+ <https://lists.gnu.org/archive/html/m4-patches/2022-03/msg00000.html>.
+
+* src/sigsegv.c (SIGSEGV_FAULT_STACKPOINTER): In the Linux/PowerPC
+32-bit case, handle musl libc differently.
+* modules/sigsegv (Files): Add m4/musl.m4.
+(configure.ac): Invoke gl_MUSL_LIBC.
+
+Backported from http://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=2d830e4a792fcd9f614ed08a7f18584b8b21d23b
+Signed-off-by: Joel Stanley <joel@jms.id.au>
+---
+ lib/sigsegv.c | 25 +++++++++++++++++++++----
+ 1 file changed, 21 insertions(+), 4 deletions(-)
+
+diff --git a/lib/sigsegv.c b/lib/sigsegv.c
+index da70ffa5fda1..da64d7d0b617 100644
+--- a/lib/sigsegv.c
++++ b/lib/sigsegv.c
+@@ -227,11 +227,28 @@ int libsigsegv_version = LIBSIGSEGV_VERSION;
+ # if defined __powerpc64__ || defined __powerpc64_elfv2__ /* 64-bit */
+ # define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.gp_regs[1]
+ # else /* 32-bit */
+-/* both should be equivalent */
+-# if 0
+-# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.regs->gpr[1]
++# if MUSL_LIBC
++/* musl libc has a different structure of ucontext_t in
++ musl/arch/powerpc/bits/signal.h. */
++/* The glibc comments say:
++ "Different versions of the kernel have stored the registers on signal
++ delivery at different offsets from the ucontext struct. Programs should
++ thus use the uc_mcontext.uc_regs pointer to find where the registers are
++ actually stored." */
++# if 0
++# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.gregs[1]
++# else
++# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_regs->gregs[1]
++# endif
+ # else
+-# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.uc_regs->gregs[1]
++/* Assume the structure of ucontext_t in
++ glibc/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h. */
++/* Because of the union, both definitions should be equivalent. */
++# if 0
++# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.regs->gpr[1]
++# else
++# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.uc_regs->gregs[1]
++# endif
+ # endif
+ # endif
+
+--
+2.35.1
+
sigsegv.c: In function 'sigsegv_handler': sigsegv.c:225:75: error: 'mcontext_t' has no member named 'uc_regs'; did you mean 'gregs'? ((ucontext_t *) ucp)->uc_mcontext.uc_regs->gregs[1] Musl defines pt_regs differently to glibc. Backport a patch from upstream gnulib (the source for this file in findutils). Fixes: http://autobuild.buildroot.net/results/1b40146436eb2b3500d0d8faef96b3374f8e5cda/ Signed-off-by: Joel Stanley <joel@jms.id.au> --- ...ort-for-Linux-PowerPC-32-bit-with-mu.patch | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 package/diffutils/0005-sigsegv-Add-support-for-Linux-PowerPC-32-bit-with-mu.patch