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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2024-07-31 16:44:12 +0200 |
|---|---|---|
| committer | Warner Losh <imp@bsdimp.com> | 2024-11-04 20:26:40 -0700 |
| commit | 1f31243a8c80fac27e52cc362cb1e2c922cf0e1b (patch) | |
| tree | 290b827b2b75619b423f2f00fc0145598bffdf45 /rust/qemu-api/build.rs | |
| parent | daaf51001a13da007d7dde72e1ed3b06bc490791 (diff) | |
| download | focaccia-qemu-1f31243a8c80fac27e52cc362cb1e2c922cf0e1b.tar.gz focaccia-qemu-1f31243a8c80fac27e52cc362cb1e2c922cf0e1b.zip | |
bsd-user/x86_64/target_arch_thread.h: Align stack
bsd-user qemu-x86_64 almost immediately dies with:
qemu: 0x4002201a68: unhandled CPU exception 0xd - aborting
on FreeBSD 14.1-RELEASE. This is an instruction that requires
alignment:
(gdb) x/i 0x4002201a68
0x4002201a68: movaps %xmm0,-0x40(%rbp)
and the argument is not aligned:
(gdb) p/x env->regs[5]
$1 = 0x822443b58
A quick experiment shows that the userspace entry point expects
misaligned rsp:
(gdb) starti
(gdb) p/x $rsp
$1 = 0x7fffffffeaa8
Emulate this behavior in bsd-user.
[[ applied Richard's suggestion ]]
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Diffstat (limited to 'rust/qemu-api/build.rs')
0 files changed, 0 insertions, 0 deletions