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authorTom Rini <trini@ti.com>2013-04-05 14:55:21 -0400
committerTom Rini <trini@ti.com>2013-04-05 14:55:21 -0400
commitcd0f4fa1ca2901312ae78bc27d4edc8286fcbf1d (patch)
tree244e08cd2c8702c9c6c5854eece41377716dbd31 /common/env_mmc.c
parentbc5fd908d976cfd898e8cbb591e7220ddc8a684a (diff)
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Revert "env: fix potential stack overflow in environment functions"
Wolfgang requested this be reverted and Rob agreed after further discussion. This was a symptom of a larger problem we need to deal with. This reverts commit 60d7d5a63189c9f77a190c9965861dc15482c2d0. Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'common/env_mmc.c')
-rw-r--r--common/env_mmc.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/common/env_mmc.c b/common/env_mmc.c
index f568013..02bd5ae 100644
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -40,8 +40,6 @@ env_t *env_ptr = &environment;
env_t *env_ptr;
#endif /* ENV_IS_EMBEDDED */
-DEFINE_CACHE_ALIGN_BUFFER(char, env_buf, CONFIG_ENV_SIZE);
-
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_ENV_OFFSET)
@@ -114,7 +112,7 @@ static inline int write_env(struct mmc *mmc, unsigned long size,
int saveenv(void)
{
- env_t *env_new = (env_t *)env_buf;
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
ssize_t len;
char *res;
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
@@ -129,7 +127,7 @@ int saveenv(void)
goto fini;
}
- res = (char *)env_new->data;
+ res = (char *)&env_new->data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
@@ -137,7 +135,7 @@ int saveenv(void)
goto fini;
}
- env_new->crc = crc32(0, env_new->data, ENV_SIZE);
+ env_new->crc = crc32(0, &env_new->data[0], ENV_SIZE);
printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV);
if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
puts("failed\n");
@@ -171,6 +169,7 @@ static inline int read_env(struct mmc *mmc, unsigned long size,
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
+ ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
u32 offset;
int ret;
@@ -185,12 +184,12 @@ void env_relocate_spec(void)
goto fini;
}
- if (read_env(mmc, CONFIG_ENV_SIZE, offset, env_buf)) {
+ if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
ret = 1;
goto fini;
}
- env_import(env_buf, 1);
+ env_import(buf, 1);
ret = 0;
fini: