This bug caused testcase "mmaptest02" to not run properly, because of the exception handler not being ran at the last access violation, presumably due to the frame pointer being incorrect. Fixing this allows the process to end gracefully.
Signed-off-by: Máté Dimand <[email protected]> --- winsup/cygwin/scripts/gendef | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/scripts/gendef b/winsup/cygwin/scripts/gendef index 7097da2e6..1c3218d18 100755 --- a/winsup/cygwin/scripts/gendef +++ b/winsup/cygwin/scripts/gendef @@ -881,7 +881,8 @@ setjmp: stp x23, x24, [x0, #0x28] // save x23, x24 stp x25, x26, [x0, #0x38] // save x25, x26 stp x27, x28, [x0, #0x48] // save x27, x28 - stp x29, x30, [x0, #0x58] // save x29 (FP) and x30 (LR) + ldr x1, [sp] // load the previous FP from the stack + stp x1, x30, [x0, #0x58] // save previous FP and x30 (LR) add x1, sp, #0x10 // get the old stack pointer str x1, [x0, #0x68] // save SP -- 2.50.1 (Apple Git-155)
From 138ee05ebb83b6c908b4e3efbfc671ef66a70e3e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?M=C3=A1t=C3=A9=20Dimand?= <[email protected]> Date: Mon, 29 Jun 2026 14:47:59 +0200 Subject: [PATCH] Cygwin: gendef: fixed AArch64 setjmp storing incorrect frame pointer in jmpbuf MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This bug caused testcase "mmaptest02" to not run properly, because of the exception handler not being ran at the last access violation, presumably due to the frame pointer being incorrect. Fixing this allows the process to end gracefully. Signed-off-by: Máté Dimand <[email protected]> --- winsup/cygwin/scripts/gendef | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/scripts/gendef b/winsup/cygwin/scripts/gendef index 7097da2e6..1c3218d18 100755 --- a/winsup/cygwin/scripts/gendef +++ b/winsup/cygwin/scripts/gendef @@ -881,7 +881,8 @@ setjmp: stp x23, x24, [x0, #0x28] // save x23, x24 stp x25, x26, [x0, #0x38] // save x25, x26 stp x27, x28, [x0, #0x48] // save x27, x28 - stp x29, x30, [x0, #0x58] // save x29 (FP) and x30 (LR) + ldr x1, [sp] // load the previous FP from the stack + stp x1, x30, [x0, #0x58] // save previous FP and x30 (LR) add x1, sp, #0x10 // get the old stack pointer str x1, [x0, #0x68] // save SP -- 2.50.1 (Apple Git-155)
