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/*
* Linker script for libmaple.
*
* Original author "lanchon" from ST forums, with modifications by LeafLabs.
*/
OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
ENTRY(_start)
SEARCH_DIR(.)
/*
* Link against libgcc, libc, and libm
*/
GROUP(libgcc.a libc.a libm.a)
/* These force the linker to search for particular symbols from
* the start of the link process and thus ensure the user's
* overrides are picked up
*/
INCLUDE names.inc
/* STM32 vector table. See stm32_vector_table.S */
EXTERN(__cs3_stm32_vector_table)
/* libcs3 C start function. See cs3.h */
EXTERN(__cs3_start_c)
/* main entry point */
EXTERN(main)
/* Initial stack pointer value. */
EXTERN(__cs3_stack)
PROVIDE(__cs3_stack = __cs3_region_start_ram + LENGTH(ram));
/* Reset vector and chip reset entry point. See start.S */
EXTERN(_start)
PROVIDE(__cs3_reset = _start);
/* Heap boundaries, for libmaple */
EXTERN(_lm_heap_start);
EXTERN(_lm_heap_end);
SECTIONS
{
/* TODO pull out rodata and stick into separate sections */
.text :
{
__text_start = .;
/*
* STM32 vector table. Leave this here. Yes, really.
*/
*(.stm32.interrupt_vector)
/*
* Program code and vague linking
*/
*(.text .text.* .gnu.linkonce.t.*)
*(.plt)
*(.gnu.warning)
*(.glue_7t) *(.glue_7) *(.vfp11_veneer)
*(.ARM.extab* .gnu.linkonce.armextab.*)
*(.gcc_except_table)
*(.eh_frame_hdr)
*(.eh_frame)
. = ALIGN(4);
KEEP(*(.init))
. = ALIGN(4);
__preinit_array_start = .;
KEEP (*(.preinit_array))
__preinit_array_end = .;
. = ALIGN(4);
__init_array_start = .;
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array))
__init_array_end = .;
. = ALIGN(0x4);
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*crtend.o(.ctors))
. = ALIGN(4);
KEEP(*(.fini))
. = ALIGN(4);
__fini_array_start = .;
KEEP (*(.fini_array))
KEEP (*(SORT(.fini_array.*)))
__fini_array_end = .;
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*crtend.o(.dtors))
/*
* struct __cs3_region used during __cs3_start_c
*/
. = ALIGN(4);
__cs3_regions = .;
LONG (0) /* flags */
LONG (__cs3_region_init_ram) /* initial contents */
LONG (__cs3_region_start_ram) /* start address */
LONG (__cs3_region_init_size_ram) /* size of initial data */
LONG (__cs3_region_zero_size_ram) /* additional size to be zeroed */
} > REGION_TEXT
/*
* Read-only data
*/
.rodata :
{
*(.rodata .rodata.* .gnu.linkonce.r.*)
} > REGION_RODATA
/*
* .ARM.exidx exception unwinding; mandated by ARM's C++ ABI
*/
__exidx_start = .;
.ARM.exidx :
{
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
} > REGION_RODATA
__exidx_end = .;
/*
* End of text
*/
.text.align :
{
. = ALIGN(8);
_etext = .;
} > REGION_TEXT
/*
* .USER_FLASH: We allow users to allocate into Flash here
*/
.USER_FLASH :
{
*(.USER_FLASH)
} > REGION_RODATA
/*
* .data
*/
.data :
{
__cs3_region_start_ram = DEFINED(_FLASH_BUILD) ? . : __text_start;
*(.got.plt) *(.got)
*(.data .data.* .gnu.linkonce.d.*)
/*
* Heap: Linker scripts may choose a custom heap by overriding
* _lm_heap_start and _lm_heap_end. Otherwise, the heap is in
* internal SRAM, beginning after .bss, and growing towards
* the stack.
*
* I'm shoving these here naively; there's probably a cleaner way
* to go about this. [mbolivar]
*/
_lm_heap_start = DEFINED(_lm_heap_start) ? _lm_heap_start : _end;
_lm_heap_end = DEFINED(_lm_heap_end) ? _lm_heap_end : __cs3_stack;
. = ALIGN (8);
_edata = .;
} > REGION_DATA AT> REGION_TEXT
/*
* .bss
*/
.bss :
{
*(.bss .bss.* .gnu.linkonce.b.*)
*(COMMON)
. = ALIGN (8);
_end = .;
} > REGION_BSS AT> REGION_TEXT
/*
* Constants needed for the pieces of CS3 we use during
* board startup; see libcs3_stm32_src/.
*/
__cs3_region_init_ram = (DEFINED(_FLASH_BUILD) ?
LOADADDR(.data) :
LOADADDR(.text));
__cs3_region_init_size_ram = (DEFINED(_FLASH_BUILD) ?
_edata - ADDR(.data) :
_edata - ADDR(.text));
__cs3_region_zero_size_ram = _end - _edata;
__cs3_region_num = 1;
/*
* Debugging sections
*/
.stab 0 (NOLOAD) : { *(.stab) }
.stabstr 0 (NOLOAD) : { *(.stabstr) }
/* DWARF debug sections.
* Symbols in the DWARF debugging sections are relative to the beginning
* of the section so we begin them at 0. */
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) }
/DISCARD/ : { *(.note.GNU-stack) }
}
|
