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target/i386: tcg: fix switching from 16-bit to 32-bit tasks or vice versa 

The format of the task state segment is governed by bit 3 in the
descriptor type field.  On a task switch, the format for saving
is given by the current value of TR's type field, while the
format for loading is given by the new descriptor.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-06-01 15:36:00 +02:00
parent a5505f6b5b
commit 1b627f389f
1 changed files with 1 additions and 1 deletions
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2
target/i386/tcg/seg_helper.c
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@ -319,7 +319,7 @@ static void switch_tss_ra(CPUX86State *env, int tss_selector,
}
/* save the current state in the old TSS */
if (type & 8) {
if (old_type & 8) {
/* 32 bit */
cpu_stl_kernel_ra(env, env->tr.base + 0x20, next_eip, retaddr);
cpu_stl_kernel_ra(env, env->tr.base + 0x24, old_eflags, retaddr);