Make sure the i386 sysv stack is aligned #219
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The previous fix had a typo in which the wrong offset was used which meant that the alignment still wasn't correct. Fix this properly now.
nielsdos
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Fixes phpGH-10398 The stack was misaligned upon entering the trampoline function [1], this causes a CPU trap when the SSE instruction is executed to copy data from the stack. This was fixed upstream [2]. This commit syncs all upstream changes from the boost/context assembly files to our copy. [1] php#10407 (comment) [2] boostorg/context#219
devnexen
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Feb 5, 2023
Fixes GH-10398 The stack was misaligned upon entering the trampoline function [1], this causes a CPU trap when the SSE instruction is executed to copy data from the stack. This was fixed upstream [2]. This commit syncs all upstream changes from the boost/context assembly files to our copy. [1] #10407 (comment) [2] boostorg/context#219 Closes GH-10407.
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The previous fix #218 had a typo in which the wrong offset was used which meant that the alignment still wasn't correct. Fix this properly now.
Sorry for this mistake, my testing didn't catch this because I set it up wrongly. This PR properly fixes the alignment and fixes the bug the original PR was meant to fix.