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check const jump argument

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This commit is contained in:
Ludwig Nussel 2009-11-01 19:58:09 +00:00
parent 469c986640
commit a7dee44def
1 changed files with 10 additions and 0 deletions
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10
code/qcommon/vm_x86_64.c
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@ -228,7 +228,14 @@ void emit(const char* fmt, ...)
assemble_line(line, strlen(line));
}
#define CHECK_IARG \
do { if(iarg < 0 || iarg >= header->instructionCount) { \
Com_Error( ERR_DROP, \
"%s: jump target out of range at offset %d", __func__, pc ); \
} } while(0)
#define JMPIARG \
CHECK_IARG; \
emit("movq $%lu, %%rax", vm->codeBase+vm->instructionPointers[iarg]); \
emit("jmpq *%%rax");
@ -488,6 +495,9 @@ void VM_Compile( vm_t *vm, vmHeader_t *header ) {
emit("subq $4, %%rsi");
break;
case OP_CONST:
if(code[pc] == OP_JUMP) {
CHECK_IARG;
}
emit("addq $4, %%rsi");
emit("movl $%d, 0(%%rsi)", iarg);
break;