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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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18
src/codegen_ops_helpers.h
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@ -1,3 +1,5 @@
#include "codegen_backend.h"
static inline int LOAD_SP_WITH_OFFSET(ir_data_t *ir, int offset)
{
if (stack32)
@ -67,3 +69,19 @@ static inline void fpu_PUSH(codeblock_t *block, ir_data_t *ir)
else
uop_SUB_IMM(ir, IREG_FPU_TOP, IREG_FPU_TOP, 1);
}
static inline void CHECK_SEG_LIMITS(codeblock_t *block, ir_data_t *ir, x86seg *seg, int addr_reg, int end_offset)
{
if ((seg == &cpu_state.seg_ds && codegen_flat_ds && !(cpu_cur_status & CPU_STATUS_NOTFLATDS)) ||
(seg == &cpu_state.seg_ss && codegen_flat_ss && !(cpu_cur_status & CPU_STATUS_NOTFLATSS)))
return;
uop_CMP_JB(ir, addr_reg, ireg_seg_limit_low(seg), codegen_gpf_rout);
if (end_offset)
{
uop_ADD_IMM(ir, IREG_temp3, addr_reg, end_offset);
uop_CMP_JNBE(ir, IREG_temp3, ireg_seg_limit_high(seg), codegen_gpf_rout);
}
else
uop_CMP_JNBE(ir, addr_reg, ireg_seg_limit_high(seg), codegen_gpf_rout);
}