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Added segment limit checking to some instructions.

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This commit is contained in:
SarahW 2019-02-03 17:48:11 +00:00
commit 095cf53265
11 changed files with 272 additions and 1 deletions
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51
src/codegen_reg.h
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@ -119,7 +119,21 @@ enum
IREG_flagsx = 74,
IREG_eflagsx = 75,
IREG_COUNT = 76,
IREG_CS_limit_low = 76,
IREG_DS_limit_low = 77,
IREG_ES_limit_low = 78,
IREG_FS_limit_low = 79,
IREG_GS_limit_low = 80,
IREG_SS_limit_low = 81,
IREG_CS_limit_high = 82,
IREG_DS_limit_high = 83,
IREG_ES_limit_high = 84,
IREG_FS_limit_high = 85,
IREG_GS_limit_high = 86,
IREG_SS_limit_high = 87,
IREG_COUNT = 88,
IREG_INVALID = 255,
@ -221,6 +235,41 @@ static inline int ireg_seg_base(x86seg *seg)
return 0;
}
static inline int ireg_seg_limit_low(x86seg *seg)
{
if (seg == &cpu_state.seg_cs)
return IREG_CS_limit_low;
if (seg == &cpu_state.seg_ds)
return IREG_DS_limit_low;
if (seg == &cpu_state.seg_es)
return IREG_ES_limit_low;
if (seg == &cpu_state.seg_fs)
return IREG_FS_limit_low;
if (seg == &cpu_state.seg_gs)
return IREG_GS_limit_low;
if (seg == &cpu_state.seg_ss)
return IREG_SS_limit_low;
fatal("ireg_seg_limit_low : unknown segment\n");
return 0;
}
static inline int ireg_seg_limit_high(x86seg *seg)
{
if (seg == &cpu_state.seg_cs)
return IREG_CS_limit_high;
if (seg == &cpu_state.seg_ds)
return IREG_DS_limit_high;
if (seg == &cpu_state.seg_es)
return IREG_ES_limit_high;
if (seg == &cpu_state.seg_fs)
return IREG_FS_limit_high;
if (seg == &cpu_state.seg_gs)
return IREG_GS_limit_high;
if (seg == &cpu_state.seg_ss)
return IREG_SS_limit_high;
fatal("ireg_seg_limit_high : unknown segment\n");
return 0;
}
extern uint8_t reg_last_version[IREG_COUNT];
extern uint8_t reg_version_refcount[IREG_COUNT][256];