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linux-user/i386: Remove xfeatures from target_fpstate_fxsave 

This is easily computed by advancing past the structure.
At the same time, replace the magic number "64".

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-04-08 10:25:47 -10:00
parent 077c43eb0d
commit fcc9b64d07
1 changed files with 1 additions and 2 deletions
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3
linux-user/i386/signal.c
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@ -67,7 +67,6 @@ struct target_fpstate_fxsave {
uint32_t xmm_space[64];
uint32_t hw_reserved[12];
struct target_fpx_sw_bytes sw_reserved;
uint8_t xfeatures[];
};
#define TARGET_FXSAVE_SIZE sizeof(struct target_fpstate_fxsave)
QEMU_BUILD_BUG_ON(TARGET_FXSAVE_SIZE != 512);
@ -266,7 +265,7 @@ static void xsave_sigcontext(CPUX86State *env, struct target_fpstate_fxsave *fxs
assert(!(fxsave_addr & 0x3f));
/* Zero the header, XSAVE *adds* features to an existing save state. */
memset(fxsave->xfeatures, 0, 64);
memset(fxsave + 1, 0, sizeof(X86XSaveHeader));
cpu_x86_xsave(env, fxsave_addr, -1);
__put_user(TARGET_FP_XSTATE_MAGIC1, &fxsave->sw_reserved.magic1);
__put_user(extended_size, &fxsave->sw_reserved.extended_size);