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startup: Make __cxx_eh_arena_size_get return 0 if exceptions disabled

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This function is necessary to provide the emergency exception
memory pool size for C++ code.
Since our libstdc++ always has exceptions enabled, this function
must exist here even if -fno-exception is set for user code.
This commit is contained in:
Jakob Hasse 2021-06-22 12:24:27 +08:00 committed by David Cermak
parent 42ea9b7cb1
commit 2bcfeb612f
2 changed files with 20 additions and 4 deletions
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12
components/esp32/cpu_start.c
View File

@ -532,12 +532,20 @@ void start_cpu1_default(void)
}
#endif //!CONFIG_FREERTOS_UNICORE
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
/**
* This function overwrites a the same function of libsupc++ (part of libstdc++).
* Consequently, libsupc++ will then follow our configured exception emergency pool size.
*
* It will be called even with -fno-exception for user code since the stdlib still uses exceptions.
*/
size_t __cxx_eh_arena_size_get(void)
{
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
return CONFIG_COMPILER_CXX_EXCEPTIONS_EMG_POOL_SIZE;
}
#else
return 0;
#endif
}
static void do_global_ctors(void)
{

12
components/esp32s2/cpu_start.c
View File

@ -395,12 +395,20 @@ void start_cpu0_default(void)
abort(); /* Only get to here if not enough free heap to start scheduler */
}
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
/**
* This function overwrites a the same function of libsupc++ (part of libstdc++).
* Consequently, libsupc++ will then follow our configured exception emergency pool size.
*
* It will be called even with -fno-exception for user code since the stdlib still uses exceptions.
*/
size_t __cxx_eh_arena_size_get(void)
{
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
return CONFIG_COMPILER_CXX_EXCEPTIONS_EMG_POOL_SIZE;
}
#else
return 0;
#endif
}
static void do_global_ctors(void)
{