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RIOT/pkg/esp8266_sdk/symbol_renames.txt
iosabi 7b1f083cd8 esp8266: Download Espressif RTOS SDK as a new RIOT PKG
RIOT-OS uses part of Espressif ESP8266 RTOS SDK to build support for
this CPU. The SDK includes some vendor-provided closed source
pre-compiled libraries that we need to modify to adapt to RIOT-OS
usage. This library modifications was done once and uploaded to a fork
of the vendor repository and was provided as an environment variable.

This patch changes two things:

1. It installs the SDK as a RIOT PKG from the new pkg/esp8266_sdk
directory instead of requiring the user to download it separately.

2. It performs the library modifications (symbol renames) on the pkg
Makefile removing the need to use a fork with the modifications applied
and simplifying the SDK update and future modifications.

This change sets the SDK package version (git SHA) to the same one that
our fork was using as a parent in the vendor repository, meaning that
the output libraries are exactly the same as before.

Tested with
```
ESP8266_RTOS_SDK_DIR=/dev/null USEMODULE=esp_log_startup make -C tests/shell BOARD=esp8266-esp-12x flash
```

and verified that the program works. The boot message now includes:
```
ESP8266-RTOS-SDK Version v3.1-51-g913a06a9
```
confirming the SDK version used.

`/dev/null` in the test is just to make sure that no evaluation of
`ESP8266_RTOS_SDK_DIR` in make is affected by the environment variable
value which would be set to the SDK for people who followed the set up
instructions before this change.

Tested the checkout size:
```bash
$ du -hs build/pkg/esp8266_sdk/
124M	build/pkg/esp8266_sdk/
```
2021-10-23 11:13:38 +00:00

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# This file is passed to objcopy with --redefine-syms. It contains a list of
# symbols to be renamed in the esp8266 vendor libraries as "old new". Symbols
# not present in the library are ignored and lines starting with # are comments,
# however unfortunately empty lines are not ignored.
#
# Note: printf and ets_printf symbol renames are handled in the pkg Makefile.
#
# libcore.a
rtc_init esp_rtc_init
#
# libcore.a libwpa.a and libespnow.a
aes_decrypt wpa_aes_decrypt
aes_decrypt_deinit wpa_aes_decrypt_deinit
aes_decrypt_init wpa_aes_decrypt_init
aes_encrypt wpa_aes_encrypt
aes_encrypt_deinit wpa_aes_encrypt_deinit
aes_encrypt_init wpa_aes_encrypt_init
aes_unwrap wpa_aes_unwrap
aes_wrap wpa_aes_wrap
hmac_md5 wpa_hmac_md5
hmac_sha1 wpa_hmac_sha1
hmac_sha1_vector wpa_hmac_sha1_vector
pbkdf2_sha1 wpa_pbkdf2_sha1
rc4_skip wpa_rc4_skip
sha1_prf wpa_sha1_prf