diff options
| author | Nico Huber <nico.h@gmx.de> | 2020-07-18 16:29:18 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-08-24 09:13:35 +0000 |
| commit | 4a7325228f7afbb47a35300a76bde5e5da0a833a (patch) | |
| tree | d0632e7598f5f85c822c42439c1c64a9f35c6197 /payloads/libpayload/libc | |
| parent | bea01e32b277682d273fa4a054f34cf725cb15b7 (diff) | |
libpayload: Cache physical location of strings
In the presence of self-relocating payloads, it's safer to keep
physical addresses in `libsysinfo`. This updates the remaining
pointers that are not consumed by libpayload code, all of them
strings.
Also update the comment that `libsysinfo` only containts physical
addresses.
Change-Id: I9d095c826b00d621201c34b329fb9b5beb1ec794
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43581
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'payloads/libpayload/libc')
| -rw-r--r-- | payloads/libpayload/libc/coreboot.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/payloads/libpayload/libc/coreboot.c b/payloads/libpayload/libc/coreboot.c index b34f2c582f..c48b6cffd8 100644 --- a/payloads/libpayload/libc/coreboot.c +++ b/payloads/libpayload/libc/coreboot.c @@ -184,9 +184,12 @@ static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info) } #endif -static void cb_parse_string(unsigned char *ptr, char **info) +static void cb_parse_string(const void *const ptr, uintptr_t *const info) { - *info = (char *)((struct cb_string *)ptr)->string; + /* ptr is already virtual (str->string just an offset to that), + but we want to keep physical addresses */ + const struct cb_string *const str = ptr; + *info = virt_to_phys(str->string); } static void cb_parse_wifi_calibration(void *ptr, struct sysinfo_t *info) |