targets/stm32f730r8tx_arduino: Add linker script Fork and combine the two arduino core linker scripts for the stm32f730r8tx. Change-Id: I5e38d5450f76c8f6c2d73a393cd45f0b22048051 Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/188950 Commit-Queue: Anthony DiGirolamo <tonymd@google.com> Reviewed-by: Armando Montanez <amontanez@google.com>
diff --git a/targets/stm32f730r8tx_arduino/BUILD.gn b/targets/stm32f730r8tx_arduino/BUILD.gn index 2e33b31..cb9c5e2 100644 --- a/targets/stm32f730r8tx_arduino/BUILD.gn +++ b/targets/stm32f730r8tx_arduino/BUILD.gn
@@ -27,6 +27,8 @@ if (current_toolchain == "//targets/stm32f730r8tx_arduino:arduino_size_optimized") { + _ldscript = "ldscript_variant.ld" + config("arduino_build") { exec_script(arduino_builder_script, filter_exclude(arduino_run_command_args, @@ -53,21 +55,28 @@ _ldflags = exec_script(arduino_builder_script, arduino_show_command_args + [ "--ld-flags" ], "list lines") - ldflags = - filter_exclude(_ldflags, - [ - # Remove arguments ending in 'core.a', for example: - # C:/Users/username/pigweed/out/core.a - "*core.a\b", + ldflags = filter_exclude( + _ldflags, + [ + # Remove arguments ending in 'core.a', for example: + # C:/Users/username/pigweed/out/core.a + "*core.a\b", - # Remove .elf output file, for example: - # -o C:/Users/username/pigweed/out/pigweed.elf - "\b-o\b", - "*.elf\b", + # Remove .elf output file, for example: + # -o C:/Users/username/pigweed/out/pigweed.elf + "\b-o\b", + "*.elf\b", - # Remove the Arduino {object_files} variable - "{object_files}", - ]) + # Remove the Arduino {object_files} variable + "{object_files}", + + # Remove default STM32 F730R8T linker script args. + "-Wl,--default-script=*../../third_party/stm32duino/hardware/stm32/2.6.0/variants/STM32F7xx/F722R\(C-E\)T_F730R8T_F732RET/ldscript.ld", + "-Wl,--script=*../../third_party/stm32duino/hardware/stm32/2.6.0/system/ldscript.ld", + ]) + + # Add the replacement ldscript + ldflags += [ "-Wl,--script=" + rebase_path(_ldscript, root_build_dir) ] # Teensy4 core recipe uses: '-larm_cortexM7lfsp_math -lm -lstdc++' libs = filter_exclude( @@ -86,6 +95,7 @@ } pw_source_set("pre_init") { + inputs = [ _ldscript ] sources = [ "init.cc" ] public_deps = [ "$dir_pw_sys_io_arduino",
diff --git a/targets/stm32f730r8tx_arduino/ldscript_variant.ld b/targets/stm32f730r8tx_arduino/ldscript_variant.ld new file mode 100644 index 0000000..b5b0eb5 --- /dev/null +++ b/targets/stm32f730r8tx_arduino/ldscript_variant.ld
@@ -0,0 +1,168 @@ +/* Entry Point */ +ENTRY(Reset_Handler) + +/* Highest address of the user mode stack */ +_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */ + +_Min_Heap_Size = 0x200; /* required amount of heap */ +_Min_Stack_Size = 0x400; /* required amount of stack */ + +/* Memories definition */ +MEMORY +{ + RAM (xrw) : ORIGIN = 0x20000000, LENGTH = LD_MAX_DATA_SIZE + FLASH (rx) : ORIGIN = 0x8000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET +} + +/* Sections */ +SECTIONS +{ + /* The startup code into "FLASH" Rom type memory */ + .isr_vector : + { + . = ALIGN(4); + KEEP(*(.isr_vector)) /* Startup code */ + . = ALIGN(4); + } >FLASH + + /* The program code and other data into "FLASH" Rom type memory */ + .text : + { + . = ALIGN(4); + *(.text) /* .text sections (code) */ + *(.text*) /* .text* sections (code) */ + *(.glue_7) /* glue arm to thumb code */ + *(.glue_7t) /* glue thumb to arm code */ + *(.eh_frame) + + KEEP (*(.init)) + KEEP (*(.fini)) + + . = ALIGN(4); + _etext = .; /* define a global symbols at end of code */ + } >FLASH + + /* Constant data into "FLASH" Rom type memory */ + .rodata : + { + . = ALIGN(4); + *(.rodata) /* .rodata sections (constants, strings, etc.) */ + *(.rodata*) /* .rodata* sections (constants, strings, etc.) */ + . = ALIGN(4); + } >FLASH + + .ARM.extab : { + . = ALIGN(4); + *(.ARM.extab* .gnu.linkonce.armextab.*) + . = ALIGN(4); + } >FLASH + + .ARM : { + . = ALIGN(4); + __exidx_start = .; + *(.ARM.exidx*) + __exidx_end = .; + . = ALIGN(4); + } >FLASH + + .preinit_array : + { + . = ALIGN(4); + PROVIDE_HIDDEN (__preinit_array_start = .); + KEEP (*(.preinit_array*)) + PROVIDE_HIDDEN (__preinit_array_end = .); + . = ALIGN(4); + } >FLASH + + .init_array : + { + . = ALIGN(4); + PROVIDE_HIDDEN (__init_array_start = .); + KEEP (*(SORT(.init_array.*))) + KEEP (*(.init_array*)) + PROVIDE_HIDDEN (__init_array_end = .); + . = ALIGN(4); + } >FLASH + + .fini_array : + { + . = ALIGN(4); + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP (*(SORT(.fini_array.*))) + KEEP (*(.fini_array*)) + PROVIDE_HIDDEN (__fini_array_end = .); + . = ALIGN(4); + } >FLASH + + /* Used by the startup to initialize data */ + _sidata = LOADADDR(.data); + + /* Initialized data sections into "RAM" Ram type memory */ + .data : + { + . = ALIGN(4); + _sdata = .; /* create a global symbol at data start */ + *(.data) /* .data sections */ + *(.data*) /* .data* sections */ + *(.RamFunc) /* .RamFunc sections */ + *(.RamFunc*) /* .RamFunc* sections */ + + . = ALIGN(4); + _edata = .; /* define a global symbol at data end */ + + } >RAM AT> FLASH + + /* Uninitialized data section into "RAM" Ram type memory */ + . = ALIGN(4); + .bss : + { + /* This is used by the startup in order to initialize the .bss section */ + _sbss = .; /* define a global symbol at bss start */ + __bss_start__ = _sbss; + *(.bss) + *(.bss*) + *(COMMON) + + . = ALIGN(4); + _ebss = .; /* define a global symbol at bss end */ + __bss_end__ = _ebss; + } >RAM + + /* Define a noinit output section and mark it as NOLOAD to prevent + * putting its contents into the resulting .bin file (which is the + * default). */ + .noinit (NOLOAD) : + { + /* Ensure output is aligned */ + . = ALIGN(4); + /* Define a global _snoinit (and _enoinit below) symbol just in case + * code wants to iterate over all noinit variables for some reason */ + _snoinit = .; + /* Actually import the .noinit and .noinit* import sections */ + *(.noinit) + *(.noinit*) + . = ALIGN(4); + _enoinit = .; + } + + /* User_heap_stack section, used to check that there is enough "RAM" Ram type memory left */ + ._user_heap_stack : + { + . = ALIGN(8); + PROVIDE ( end = . ); + PROVIDE ( _end = . ); + . = . + _Min_Heap_Size; + . = . + _Min_Stack_Size; + . = ALIGN(8); + } >RAM + + /* Remove information from the compiler libraries */ + /DISCARD/ : + { + libc.a ( * ) + libm.a ( * ) + libgcc.a ( * ) + } + + .ARM.attributes 0 : { *(.ARM.attributes) } +}