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From: Samuel Thibault <sthibaul@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] hurd: Fix aligning signal stack pointer Date: Tue, 16 May 2023 14:09:16 +0000 (GMT) [thread overview] Message-ID: <20230516140916.118CB3858C83@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ff0f87632a74a369a2b992f4436ae406065a4012 commit ff0f87632a74a369a2b992f4436ae406065a4012 Author: Sergey Bugaev <bugaevc@gmail.com> Date: Mon May 15 11:33:20 2023 +0300 hurd: Fix aligning signal stack pointer Fixes 60f9bf974694d50daf58d46347b06a5975ac5ddd "hurd: Port trampoline.c to x86_64" Checked on x86_64-gnu. Reported-by: Bruno Haible <bruno@clisp.org> Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-Id: <20230515083323.1358039-2-bugaevc@gmail.com> Diff: --- sysdeps/mach/hurd/x86/trampoline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sysdeps/mach/hurd/x86/trampoline.c b/sysdeps/mach/hurd/x86/trampoline.c index e13c5d85f5..19bddad8e1 100644 --- a/sysdeps/mach/hurd/x86/trampoline.c +++ b/sysdeps/mach/hurd/x86/trampoline.c @@ -200,7 +200,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action /* Align SP at 16 bytes. Coupled with the fact that sigreturn_addr is 16-byte aligned within the stackframe struct, this ensures that it ends up on a 16-byte aligned address, as required by the ABI. */ - sigsp = (void *) ((uintptr_t) sigsp & 16UL); + sigsp = (void *) ((uintptr_t) sigsp & ~15UL); #endif /* Push the arguments to call `trampoline' on the stack. */
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