1. Re-organize to make clear for all targets/toolchains support in single startup file
2. Inline assembly syntax is limited, esp. on IAR. Try paving the way for accessing external symbols still in inline assembly instead of re-write in assembly.
1. Enable GCC support on non-secure targets
2. Disable GCC support on secure targets becasue of GCC bug (as of 9-2019-q4-major): In non-secure entry function, callee-saved registers must be restored, but they are incorrectly cleared at optimization level "Os".
In STM32 Cube HAL, in interrupt mode (async),
2 bytes can be prepared in hardware registers without any read
(1 in regular register, the other in shift register),
but Only 1 RX byte can stored in hardware register, specially when there is no hardware FIFO.
If interrupt handling is fast enough, each read is made in parralele of the write.
But if interrupt handling is too long or is interrupted for too long,
it can happen that one read byte is lost (overrun).
For STM32F4, Tickless has been deactivated to avoid such issue.
For STM32L0, we don't want to deactivate tickless,
because those chips are specially design for lowpower.
So instead of removing SPI async mode,
we propose to change the HAL behavior specially for L0:
each byte is send only when previous read is performed.
Thus only 1 RX byte at a time which is saved in hardware register.
This prevent overrun, but it introduceS some latency between each byte send,
this is why it is not applied to all STM32 families.
Add a "used" attribute to SVCHandler_main/tfm_pendsv_do_schedule to fix ARMC6 build with
the "-flto" flag.
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST.)
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST.)
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST.)
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST.)
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to __vector_handlers to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to interruptVectors to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to hyperflash_config/image_vector_table to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to IVT_NAME/blank_checksum
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to IVT_NAME/blank_checksum
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to ulDebugHeader (placed in signature_section section)
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.
This code prevents the ARMC6 compiler/linker from removing
SUB_REALLOC/CALLOC symbols from image when LTO is enabled
Fixes below error:
L6137E: Symbol $Sub$$calloc was not preserved by the LTO codegen but is needed by the image.
Fix for the error caused by lto on armc6 compiler:
L6137E: Symbol RTC_IRQHandler was not preserved by the LTO codegen but is needed by the image.
lto optimization cause that local symbol RTC_IRQHandler(from rtc_api.c)
somehow interferes with global symbol RTC_IRQHandler (from startup_stm32f070xb.S)
Changing local RTC_IRQHandler to _RTC_IRQHandler fixes problem
Add a "used" attribute to Reset_Handler_Cascade to fix GCC build with
the "-flto" flag.
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.
Michal Paszta
Martin Kojtal
midd
Marcelo Salazar
Hugues Kamba
Chun-Chieh Li
Mahesh Mahadevan
Alexandre Bourdiol
Maciej Bocianski
Filip Jagodzinski
Filip Jagodzinski