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Check for RPN stack overflow in linker

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dbrotz
2019-06-11 10:45:51 -07:00
parent 015d2b0830
commit 74e9de1b71
1 changed files with 6 additions and 1 deletions
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7
src/link/patch.c
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@@ -18,13 +18,18 @@
#include "link/mylink.h" #include "link/mylink.h"
#include "link/symbol.h" #include "link/symbol.h"
#define RPN_STACK_SIZE 256
static struct sSection *pCurrentSection; static struct sSection *pCurrentSection;
static int32_t rpnstack[256]; static int32_t rpnstack[RPN_STACK_SIZE];
static int32_t rpnp; static int32_t rpnp;
int32_t nPC; int32_t nPC;
static void rpnpush(int32_t i) static void rpnpush(int32_t i)
{ {
if (rpnp >= RPN_STACK_SIZE)
errx(1, "RPN stack overflow");
rpnstack[rpnp] = i; rpnstack[rpnp] = i;
rpnp++; rpnp++;
} }