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arm: Expand memory validation

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Prevent SIGSEGV for write as well as read.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
MyungJoo Ham 2016-03-28 04:35:49 +00:00 • committed by Dave Watson
parent 3b3a453a65
commit 74d7cd9898
1 changed files with 5 additions and 5 deletions

10
src/arm/Ginit.c
View file

@ -126,6 +126,11 @@ static int
access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write, access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
void *arg) void *arg)
{ {
/* validate address */
const struct cursor *c = (const struct cursor *) arg;
if (c && validate_mem(addr))
return -1;
if (write) if (write)
{ {
Debug (16, "mem[%x] <- %x\n", addr, *val); Debug (16, "mem[%x] <- %x\n", addr, *val);
@ -133,11 +138,6 @@ access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
} }
else else
{ {
/* validate address */
const struct cursor *c = (const struct cursor *) arg;
if (c && validate_mem(addr))
return -1;
*val = *(unw_word_t *) addr; *val = *(unw_word_t *) addr;
Debug (16, "mem[%x] -> %x\n", addr, *val); Debug (16, "mem[%x] -> %x\n", addr, *val);
} }