mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
096c013675
...and all their callers. With the upcoming switch from sizeof(time_t)==4 to sizeof(time_t)==8, sizeof(struct stat) is also increasing. A few newlib functions present in ROM allocate 'struct stat' on the stack and call _fstat_r on this structure. The implementation of fstat is provided in ESP-IDF. This implementation will often do memset(st, 0, sizeof(*st)), where st is 'struct stat*', before setting some fields of this structure. If IDF is built with sizeof(st) different from sizeof(st) which ROM was built with, this will lead to an out-of-bounds write and a stack corruption. This commit removes problematic ROM functions from the linker script. Here are the functions which allocate 'struct stat': * _isatty_r (in ROM) * __swhatbuf_r, called by __smakebuf_r, called by __swsetup_r and __srefill_r (in ROM) * _fseeko_r (not in ROM) * glob2 (not in ROM) * _gettemp (not in ROM) As a result, these functions are used from libc.a, and use correct size of 'stat' structure. Closes https://github.com/espressif/esp-idf/issues/7980
39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
/* These are the newlib functions and the .bss/.data symbols necessary for these functions present in ESP32 ROM.
|
|
They should not be used when you need to solve the Y2K38 problem.
|
|
Because these functions were compiled with 32-bit width for the time_t structure.
|
|
*/
|
|
|
|
asctime = 0x40059588;
|
|
asctime_r = 0x40000ec8;
|
|
ctime = 0x400595b0;
|
|
ctime_r = 0x400595c4;
|
|
__gettzinfo = 0x40001fcc;
|
|
__get_current_time_locale = 0x40001834;
|
|
gmtime = 0x40059848;
|
|
gmtime_r = 0x40059868;
|
|
localtime = 0x400595dc;
|
|
localtime_r = 0x400595fc;
|
|
mktime = 0x4005a5e8;
|
|
strftime = 0x40059ab4;
|
|
time = 0x40001844;
|
|
__time_load_locale = 0x4000183c;
|
|
tzset = 0x40001a1c;
|
|
_tzset_r = 0x40001a28;
|
|
__tzcalc_limits = 0x400018a0;
|
|
__tz_lock = 0x40001a04;
|
|
__tz_unlock = 0x40001a10;
|
|
/* The .bss/.data symbols necessary for these functions */
|
|
_timezone = 0x3ffae0a0;
|
|
_tzname = 0x3ffae030;
|
|
_daylight = 0x3ffae0a4;
|
|
__month_lengths = 0x3ff9609c;
|
|
|
|
/* These functions don't use time_t, but use other structures which include time_t.
|
|
* For example, 'struct stat' contains time_t.
|
|
*/
|
|
_isatty_r = 0x40000ea0;
|
|
__sfvwrite_r = 0x4005893c;
|
|
__smakebuf_r = 0x40059108;
|
|
__srefill_r = 0x400593d4;
|
|
__swsetup_r = 0x40058cc8;
|