arduino/esp8266
1
0
Fork 0
mirror of https://github.com/esp8266/Arduino.git synced 2025-07-05 12:42:22 +03:00
Code Activity

Clean up code to build under GCC7, fix pgm_read_unaligned (#6270)

Browse Source 
Apply most compatible changes needed to get the core compiling under GCC
7.2 to the main gcc 4.8 tree to ease porting for 3.0.0.

Update pgmspace.h with corrected and optimized unaligned pgm_read
macros.  Now pgm_read_dword in the unaligned case gives proper results
even if optimization is enabled and is also written in assembly and only
1 instruction longer than the pgm_read_byte macro (which also has been
optimized to reduce 1 instruction).  These changes should marginally
shrink code and speed up flash reads accordingly.

The toolchain should/will be rebuilt at a later time with this
optimization to ensure it's used in the libc.a/etc. files.
This commit is contained in:
Earle F. Philhower, III
2019-07-08 01:17:48 -07:00
committed by david gauchard
parent 76cda9bdbc
commit d2a487dfd9
6 changed files with 31 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
cores/esp8266/core_esp8266_main.cpp
View File

@ -236,8 +236,8 @@ void init_done() {
*/
extern "C" void ICACHE_RAM_ATTR app_entry_redefinable(void) __attribute__((weak));
extern "C" void ICACHE_RAM_ATTR app_entry_redefinable(void)
extern "C" void app_entry_redefinable(void) __attribute__((weak));
extern "C" void app_entry_redefinable(void)
{
/* Allocate continuation context on this SYS stack,
and save pointer to it. */
@ -248,9 +248,9 @@ extern "C" void ICACHE_RAM_ATTR app_entry_redefinable(void)
call_user_start();
}
static void ICACHE_RAM_ATTR app_entry_custom (void) __attribute__((weakref("app_entry_redefinable")));
static void app_entry_custom (void) __attribute__((weakref("app_entry_redefinable")));
extern "C" void ICACHE_RAM_ATTR app_entry (void)
extern "C" void app_entry (void)
{
return app_entry_custom();
}