https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=ae46abc226ce10aa79a9c4a390c74a83c59d47c7
commit ae46abc226ce10aa79a9c4a390c74a83c59d47c7 Author: Thirumalai Nagalingam <[email protected]> AuthorDate: Sat Dec 6 19:14:56 2025 +0530 Commit: Corinna Vinschen <[email protected]> CommitDate: Fri Jan 16 19:48:53 2026 +0100 Cygwin: gendef: add _sigfe_maybe for TLS initialization checks on AArch64 Signed-off-by: Thirumalai Nagalingam <[email protected]> Diff: --- winsup/cygwin/scripts/gendef | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/winsup/cygwin/scripts/gendef b/winsup/cygwin/scripts/gendef index 813857886062..32ceb357802c 100755 --- a/winsup/cygwin/scripts/gendef +++ b/winsup/cygwin/scripts/gendef @@ -367,8 +367,24 @@ EOF .include "tlsoffsets" .text -_sigfe_maybe: - .global _sigbe + .seh_proc _sigfe_maybe +_sigfe_maybe: # stack is aligned on entry! + .seh_endprologue + ldr x10, [x18, #0x8] // Load TEB pointer in x10 + ldr x11, =_cygtls.initialized // Load relative offset of _cygtls.initialized + add x11, x10, x11 // compute absolute address and store in x11 + cmp sp, x11 // Compare current stack pointer with TLS location + b.hs 0f // if sp >= tls, skip TLS logic + ldr w12, [x11] // Load the value at _cygtls.initialized (32-bit) + movz w13, #0xc763 // Prepare magic value(0xc763173f) lower 16 bits + movk w13, #0x173f, lsl #16 // Add upper 16 bits, full value now in w13 + cmp w12, w13 // Compare loaded value with magic + b.ne 0f // If not equal, not initialized, skip TLS logic + ret +0: + ret + .seh_endproc + _sigfe: _sigbe: .global sigdelayed
