diff options
Diffstat (limited to 'common/hwconfig.c')
| -rw-r--r-- | common/hwconfig.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/common/hwconfig.c b/common/hwconfig.c index 1f9f4a09b4..3c9759fc55 100644 --- a/common/hwconfig.c +++ b/common/hwconfig.c @@ -26,6 +26,8 @@ #define min(a, b) (((a) < (b)) ? (a) : (b)) #endif /* HWCONFIG_TEST */ +DECLARE_GLOBAL_DATA_PTR; + static const char *hwconfig_parse(const char *opts, size_t maxlen, const char *opt, char *stopchs, char eqch, size_t *arglen) @@ -69,9 +71,26 @@ next: const char *cpu_hwconfig __attribute__((weak)); const char *board_hwconfig __attribute__((weak)); +#define HWCONFIG_PRE_RELOC_BUF_SIZE 128 + static const char *__hwconfig(const char *opt, size_t *arglen) { - const char *env_hwconfig = getenv("hwconfig"); + const char *env_hwconfig = NULL; + char buf[HWCONFIG_PRE_RELOC_BUF_SIZE]; + + if (gd->flags & GD_FLG_ENV_READY) { + env_hwconfig = getenv("hwconfig"); + } else { + /* + * Use our own on stack based buffer before relocation to allow + * accessing longer hwconfig strings that might be in the + * environment before we've relocated. This is pretty fragile + * on both the use of stack and if the buffer is big enough. + * However we will get a warning from getenv_f for the later. + */ + if ((getenv_f("hwconfig", buf, sizeof(buf))) > 0) + env_hwconfig = buf; + } if (env_hwconfig) return hwconfig_parse(env_hwconfig, strlen(env_hwconfig), |