esp-idf/components/esp_rom/esp32
Darian Leung fbcde6777f newlib: Add workaround for printf functions using 32-bit time_t on first call
sizeof(time_t) was previously switched from 4 to 8, ROM functions that use
time_t or dependent types (such as "struct stat") are no longer called due as
they still treat sizeof(time_t) as 4 (see commit
24c20d188e).

However, there is a ROM callpath that was left out. If putchar is the first
stdio print related call, the call path will result in cantwrite() ->
__swsetup_r() -> __smakebuf_r() -> __swhatbuf_r() using the ROM "struct stat"
(where sizeof(time_t)==4).

Instead of removing all printf related ROM newlib functions (which will result
in increased binary size), this commit adds a workaround to setup the stdio
files before any print related calls occur.

This results in cantwrite() always returning false, thus the callpath described
above never being reached.

Closes https://github.com/espressif/esp-idf/issues/9269
2022-08-21 15:27:50 +08:00
..
ld tjpgd: Remove ROM patches and tests. 2022-08-17 14:42:45 +02:00
esp_rom_caps.h newlib: Add workaround for printf functions using 32-bit time_t on first call 2022-08-21 15:27:50 +08:00
Kconfig.soc_caps.in newlib: Add workaround for printf functions using 32-bit time_t on first call 2022-08-21 15:27:50 +08:00