diff options
Diffstat (limited to 'source/e/emacs/emacs.glibc-2.34.patch')
| -rw-r--r-- | source/e/emacs/emacs.glibc-2.34.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/source/e/emacs/emacs.glibc-2.34.patch b/source/e/emacs/emacs.glibc-2.34.patch new file mode 100644 index 00000000..6d764aa2 --- /dev/null +++ b/source/e/emacs/emacs.glibc-2.34.patch @@ -0,0 +1,40 @@ +From f97e07ea807cc6d38774a3888a15091b20645ac6 Mon Sep 17 00:00:00 2001 +From: Paul Eggert <eggert@cs.ucla.edu> +Date: Tue, 9 Mar 2021 11:22:59 -0800 +Subject: [PATCH] Port alternate signal stack to upcoming glibc 2.34 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +* src/sysdep.c (sigsegv_stack): Increase size to 64 KiB and align +it to max_align_t. This copies from Gnulib’s c-stack.c, and works +around a portability bug in draft glibc 2.34, which no longer +defines SIGSTKSZ when _GNU_SOURCE is defined. +--- + src/sysdep.c | 10 +++++++++- + 1 file changed, 9 insertions(+), 1 deletion(-) + +diff --git a/src/sysdep.c b/src/sysdep.c +index 941b4e2fa2..24d8832b2f 100644 +--- a/src/sysdep.c ++++ b/src/sysdep.c +@@ -1785,7 +1785,15 @@ handle_arith_signal (int sig) + + /* Alternate stack used by SIGSEGV handler below. */ + +-static unsigned char sigsegv_stack[SIGSTKSZ]; ++/* Storage for the alternate signal stack. ++ 64 KiB is not too large for Emacs, and is large enough ++ for all known platforms. Smaller sizes may run into trouble. ++ For example, libsigsegv 2.6 through 2.8 have a bug where some ++ architectures use more than the Linux default of an 8 KiB alternate ++ stack when deciding if a fault was caused by stack overflow. */ ++static max_align_t sigsegv_stack[(64 * 1024 ++ + sizeof (max_align_t) - 1) ++ / sizeof (max_align_t)]; + + + /* Return true if SIGINFO indicates a stack overflow. */ +-- +2.29.2 + |