Fixed dynamic allocation not working
* changed Mbed linker script for ST's + added small dynamic allocation test
This commit is contained in:
parent
c7ad1d1add
commit
904f92b6f7
4
Makefile
4
Makefile
@ -3,7 +3,7 @@
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# --- control global project settings
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# RELEASE=1 -> enable optimisation, then disable debug
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# RELEASE=0 -> disbale optimisation, then enable debug
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# RELEASE=0 -> disable optimisation, then enable debug
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RELEASE=0
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# --- project architecture
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@ -104,7 +104,7 @@ ${BIN}/%.elf : ${MAIN_OBJECT_FILES} ${COMMON_OBJECT_FILES}
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@echo ${COMMON_OBJECT_FILES}
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@echo
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${DIR_GUARD}
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${CC} ${CFLAGS} --verbose -o $@ ${filter-out %ld, $^} ${LIBRARIES} ${LDFLAGS}
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${CC} ${CFLAGS} -o $@ ${filter-out %ld, $^} ${LIBRARIES} ${LDFLAGS}
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${OBJDUMP} -h $@
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${SIZE} $@
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@${SKIP_LINE}
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10
src/main.c
10
src/main.c
@ -1,5 +1,6 @@
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// standard headers
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#include <stdint.h>
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#include <stdlib.h>
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// driver includes
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#include "drivers/rcc.h"
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@ -8,6 +9,8 @@
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Clock_t sysclks;
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#include "drivers/timer.h"
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extern uint32_t end;
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//------------------------------------------------------------------------------
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/* static variables */;
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int val = 0; //debug led
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@ -35,6 +38,13 @@ int main(void) {
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timer_tick_init(TIM2, 1000, timeout_cb);
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timer_start(TIM2);
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uint32_t test = (uint32_t)(&end);
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test++;
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int* tab = (int*)malloc(10*sizeof(int));
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for(int i=0; i<10; ++i) {
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tab[i] = i;
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}
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// main loop
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for(;;);
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@ -1,160 +1,177 @@
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/* Linker script to configure memory regions. */
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/* 0xEC reserved for vectors - 8byte aligned = 0xF0 */
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STACK_SIZE = 0x400;
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 32K
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RAM (rwx) : ORIGIN = 0x200000F0, LENGTH = 10K - (0xEC+0x4)
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}
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/* Linker script to place sections and symbol values. Should be used together
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* with other linker script that defines memory regions FLASH and RAM.
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* It references following symbols, which must be defined in code:
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* Reset_Handler : Entry of reset handler
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*
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* It defines following symbols, which code can use without definition:
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* __exidx_start
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* __exidx_end
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* __etext
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* __data_start__
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* __preinit_array_start
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* __preinit_array_end
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* __init_array_start
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* __init_array_end
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* __fini_array_start
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* __fini_array_end
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* __data_end__
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* __bss_start__
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* __bss_end__
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* __end__
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* end
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* __HeapLimit
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* __StackLimit
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* __StackTop
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* __stack
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* _estack
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/**
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******************************************************************************
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* @file LinkerScript.ld
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* @author Auto-generated by STM32CubeIDE
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* @brief Linker script for STM32F103C8Tx Device from STM32F1 series
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* 64Kbytes FLASH
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* 20Kbytes RAM
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*
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* Set heap size, stack size and stack location according
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* to application requirements.
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*
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* Set memory bank area and size if external memory is used
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2020 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Entry Point */
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ENTRY(Reset_Handler)
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SECTIONS
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/* Highest address of the user mode stack */
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_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
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_Min_Heap_Size = 0x200; /* required amount of heap */
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_Min_Stack_Size = 0x400; /* required amount of stack */
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/* Memories definition */
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MEMORY
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{
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.text :
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{
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KEEP(*(.isr_vector))
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*(.text*)
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KEEP(*(.init))
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KEEP(*(.fini))
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/* .ctors */
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*crtbegin.o(.ctors)
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*crtbegin?.o(.ctors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
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*(SORT(.ctors.*))
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*(.ctors)
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/* .dtors */
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*crtbegin.o(.dtors)
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*crtbegin?.o(.dtors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
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*(SORT(.dtors.*))
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*(.dtors)
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*(.rodata*)
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KEEP(*(.eh_frame*))
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} > FLASH
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.ARM.extab :
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{
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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} > FLASH
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__exidx_start = .;
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.ARM.exidx :
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{
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*(.ARM.exidx* .gnu.linkonce.armexidx.*)
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} > FLASH
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__exidx_end = .;
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__etext = .;
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_sidata = .;
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.data : AT (__etext)
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{
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__data_start__ = .;
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_sdata = .;
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*(vtable)
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*(.data*)
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. = ALIGN(8);
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/* preinit data */
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP(*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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. = ALIGN(8);
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/* init data */
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP(*(SORT(.init_array.*)))
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KEEP(*(.init_array))
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PROVIDE_HIDDEN (__init_array_end = .);
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. = ALIGN(8);
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/* finit data */
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP(*(SORT(.fini_array.*)))
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KEEP(*(.fini_array))
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PROVIDE_HIDDEN (__fini_array_end = .);
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KEEP(*(.jcr*))
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. = ALIGN(8);
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/* All data end */
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__data_end__ = .;
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_edata = .;
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} > RAM
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.bss :
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{
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. = ALIGN(8);
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__bss_start__ = .;
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_sbss = .;
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*(.bss*)
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*(COMMON)
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. = ALIGN(8);
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__bss_end__ = .;
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_ebss = .;
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} > RAM
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.heap (COPY):
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{
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__end__ = .;
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end = __end__;
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*(.heap*)
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. = ORIGIN(RAM) + LENGTH(RAM) - STACK_SIZE;
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__HeapLimit = .;
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} > RAM
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/* .stack_dummy section doesn't contains any symbols. It is only
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* used for linker to calculate size of stack sections, and assign
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* values to stack symbols later */
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.stack_dummy (COPY):
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{
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*(.stack*)
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} > RAM
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/* Set stack top to end of RAM, and stack limit move down by
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* size of stack_dummy section */
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__StackTop = ORIGIN(RAM) + LENGTH(RAM);
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_estack = __StackTop;
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__StackLimit = __StackTop - STACK_SIZE;
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PROVIDE(__stack = __StackTop);
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/* Check if data + heap + stack exceeds RAM limit */
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ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
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FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 64K
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}
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/* Sections */
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SECTIONS
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{
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/* The startup code into "FLASH" Rom type memory */
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.isr_vector :
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{
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. = ALIGN(4);
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KEEP(*(.isr_vector)) /* Startup code */
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. = ALIGN(4);
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} >FLASH
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/* The program code and other data into "FLASH" Rom type memory */
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.text :
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{
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. = ALIGN(4);
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*(.text) /* .text sections (code) */
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*(.text*) /* .text* sections (code) */
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*(.glue_7) /* glue arm to thumb code */
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*(.glue_7t) /* glue thumb to arm code */
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*(.eh_frame)
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KEEP (*(.init))
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KEEP (*(.fini))
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. = ALIGN(4);
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_etext = .; /* define a global symbols at end of code */
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} >FLASH
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/* Constant data into "FLASH" Rom type memory */
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.rodata :
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{
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. = ALIGN(4);
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*(.rodata) /* .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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. = ALIGN(4);
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} >FLASH
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.ARM.extab : {
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. = ALIGN(4);
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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. = ALIGN(4);
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} >FLASH
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.ARM : {
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. = ALIGN(4);
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__exidx_start = .;
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*(.ARM.exidx*)
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__exidx_end = .;
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. = ALIGN(4);
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} >FLASH
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.preinit_array :
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{
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. = ALIGN(4);
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array*))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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. = ALIGN(4);
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} >FLASH
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.init_array :
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{
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. = ALIGN(4);
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT(.init_array.*)))
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KEEP (*(.init_array*))
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PROVIDE_HIDDEN (__init_array_end = .);
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. = ALIGN(4);
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} >FLASH
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.fini_array :
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{
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. = ALIGN(4);
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT(.fini_array.*)))
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KEEP (*(.fini_array*))
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PROVIDE_HIDDEN (__fini_array_end = .);
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. = ALIGN(4);
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} >FLASH
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/* Used by the startup to initialize data */
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_sidata = LOADADDR(.data);
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/* Initialized data sections into "RAM" Ram type memory */
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.data :
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{
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. = ALIGN(4);
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_sdata = .; /* create a global symbol at data start */
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*(.data) /* .data sections */
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*(.data*) /* .data* sections */
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. = ALIGN(4);
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_edata = .; /* define a global symbol at data end */
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} >RAM AT> FLASH
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/* Uninitialized data section into "RAM" Ram type memory */
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. = ALIGN(4);
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.bss :
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{
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/* This is used by the startup in order to initialize the .bss section */
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_sbss = .; /* define a global symbol at bss start */
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__bss_start__ = _sbss;
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*(.bss)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .; /* define a global symbol at bss end */
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__bss_end__ = _ebss;
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} >RAM
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/* User_heap_stack section, used to check that there is enough "RAM" Ram type
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* memory left */
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._user_heap_stack :
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{
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. = ALIGN(8);
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PROVIDE ( end = . );
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PROVIDE ( _end = . );
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. = . + _Min_Heap_Size;
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. = . + _Min_Stack_Size;
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. = ALIGN(8);
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} >RAM
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/* Remove information from the compiler libraries */
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/DISCARD/ :
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{
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libc.a ( * )
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libm.a ( * )
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libgcc.a ( * )
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}
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.ARM.attributes 0 : { *(.ARM.attributes) }
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}
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