2020-03-17 05:02:24 -04:00
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/* These are the newlib functions and the .bss/.data symbols necessary for these functions present in ESP32 ROM.
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2020-01-09 23:58:54 -05:00
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They should not be used when you need to solve the Y2K38 problem.
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Because these functions were compiled with 32-bit width for the time_t structure.
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*/
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asctime = 0x40059588;
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asctime_r = 0x40000ec8;
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ctime = 0x400595b0;
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ctime_r = 0x400595c4;
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__gettzinfo = 0x40001fcc;
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__get_current_time_locale = 0x40001834;
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gmtime = 0x40059848;
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gmtime_r = 0x40059868;
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localtime = 0x400595dc;
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localtime_r = 0x400595fc;
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mktime = 0x4005a5e8;
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strftime = 0x40059ab4;
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time = 0x40001844;
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__time_load_locale = 0x4000183c;
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tzset = 0x40001a1c;
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_tzset_r = 0x40001a28;
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2020-03-17 05:02:24 -04:00
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__tzcalc_limits = 0x400018a0;
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__tz_lock = 0x40001a04;
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__tz_unlock = 0x40001a10;
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/* The .bss/.data symbols necessary for these functions */
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_timezone = 0x3ffae0a0;
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_tzname = 0x3ffae030;
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_daylight = 0x3ffae0a4;
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__month_lengths = 0x3ff9609c;
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esp_rom: remove functions which depend on sizeof(struct stat)
...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
2022-01-06 09:20:04 -05:00
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/* These functions don't use time_t, but use other structures which include time_t.
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* For example, 'struct stat' contains time_t.
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*/
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_isatty_r = 0x40000ea0;
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__sfvwrite_r = 0x4005893c;
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__smakebuf_r = 0x40059108;
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__srefill_r = 0x400593d4;
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__swsetup_r = 0x40058cc8;
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