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| author | Youfu Zhang <zhangyoufu@gmail.com> | 2021-02-23 03:52:43 +0000 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-03-20 17:08:03 +0000 |
| commit | e0fae78e1deeaae5bc3c6a8426ece37c62445bf4 (patch) | |
| tree | 466dba0a2c801df33f6573e800d968d284e5f3a2 /src/os/exec | |
| parent | 6ae3b70ef255cd7317764a12b7230f293683f2c5 (diff) | |
| download | go-e0fae78e1deeaae5bc3c6a8426ece37c62445bf4.tar.xz | |
runtime: fix stack alignment for Windows amd64 lib entry
Windows amd64 calling convention requires 16-bytes aligned
stack pointer. Before this patch, the real frame size is
0x48 (frame size) + 0x10 (frame pointer & return address),
which does not satisfy the alignment requirement.
_cgo_sys_thread_create eventually calls NtCreateThread,
which receives a pointer to a ThreadContext structure
allocated from (mis-aligned) stack, and may fail with
STATUS_DATATYPE_MISALIGNMENT on some implementations.
BP is saved/restored by prolog/epilog.
AX, CX, DX are volatile, no need to save and restore.
Fixes #41075
Change-Id: I01c0a22b4bf3b4cfdebf4df587445aa46c667973
GitHub-Last-Rev: 15d2bd740e3e61c9753b3e1b574fdb5da538459c
GitHub-Pull-Request: golang/go#44524
Reviewed-on: https://go-review.googlesource.com/c/go/+/295329
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Christopher Nelson <nadiasvertex@gmail.com>
Diffstat (limited to 'src/os/exec')
0 files changed, 0 insertions, 0 deletions