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dtrace: Address KMSAN warnings in dtrace_disx86

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wbit was not being initialized in a couple of cases.

Reported by:	asomers
MFC after:	2 weeks
This commit is contained in:
Mark Johnston 2024-11-22 13:50:26 +00:00
parent f85dd3f546
commit 418d8f0dc2
1 changed files with 4 additions and 2 deletions
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6
sys/cddl/dev/dtrace/x86/dis_tables.c
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@ -3720,8 +3720,8 @@ dtrace_disx86(dis86_t *x, uint_t cpu_mode)
x->d86_len = 0;
x->d86_rmindex = -1;
x->d86_error = 0;
#ifdef DIS_TEXT
x->d86_numopnds = 0;
#ifdef DIS_TEXT
x->d86_seg_prefix = NULL;
x->d86_mnem[0] = 0;
for (i = 0; i < 4; ++i) {
@ -4860,6 +4860,7 @@ mm_shift:
dtrace_rex_adjust(rex_prefix, mode, NULL, &r_m);
dtrace_get_operand(x, mode, r_m, LONG_OPND, vbit);
dtrace_get_operand(x, REG_ONLY, reg, SEG_OPND, 1 - vbit);
wbit = SEG_OPND;
break;
/*
@ -5787,6 +5788,7 @@ xmmprm:
#endif
dtrace_rex_adjust(rex_prefix, mode, &reg, &r_m);
dtrace_get_operand(x, mode, r_m, BYTE_OPND, 0);
wbit = LONG_OPND;
}
break;
@ -6442,7 +6444,7 @@ done:
else
x->d86_memsize = dp->it_size;
} else if (wbit == 0) {
} else if (wbit == BYTE_OPND) {
x->d86_memsize = 1;
} else if (wbit == LONG_OPND) {