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itest: make memory access work under sandbox

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itest accesses memory, and hence must map/unmap it. Without doing so, it
accesses invalid addresses and crashes.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2015-10-03 13:56:46 -06:00 committed by Tom Rini
parent 40d2154726
commit 7861204c9a
1 changed files with 17 additions and 6 deletions
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23
common/cmd_itest.c
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@ -15,6 +15,9 @@
#include <common.h>
#include <config.h>
#include <command.h>
#include <mapmem.h>
#include <asm/io.h>
#define EQ 0
#define NE 1
@ -49,16 +52,24 @@ static const op_tbl_t op_table [] = {
static long evalexp(char *s, int w)
{
long l = 0;
long *p;
unsigned long addr;
void *buf;
/* if the parameter starts with a * then assume is a pointer to the value we want */
if (s[0] == '*') {
p = (long *)simple_strtoul(&s[1], NULL, 16);
switch (w) {
case 1: return((long)(*(unsigned char *)p));
case 2: return((long)(*(unsigned short *)p));
case 4: return(*p);
addr = simple_strtoul(&s[1], NULL, 16);
buf = map_physmem(addr, w, MAP_WRBACK);
if (!buf) {
puts("Failed to map physical memory\n");
return 0;
}
switch (w) {
case 1: l = (long)(*(unsigned char *)buf);
case 2: l = (long)(*(unsigned short *)buf);
case 4: l = (long)(*(unsigned long *)buf);
}
unmap_physmem(buf, w);
return l;
} else {
l = simple_strtoul(s, NULL, 16);
}