pinebuds/scripts/link/programmer.lds.S

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2022-08-15 04:20:27 -05:00
/***************************************************************************
*
* Copyright 2015-2019 BES.
* All rights reserved. All unpublished rights reserved.
*
* No part of this work may be used or reproduced in any form or by any
* means, or stored in a database or retrieval system, without prior written
* permission of BES.
*
* Use of this work is governed by a license granted by BES.
* This work contains confidential and proprietary information of
* BES. which is protected by copyright, trade secret,
* trademark and other intellectual property rights.
*
****************************************************************************/
#include "plat_addr_map.h"
#define MIN_BURN_BUFFER_SIZE 0x2000
#define HEAP_SECTION_SIZE 0x40
#define STACK_SECTION_SIZE 0x1000
#define CODE_MSG_OVERHEAD 8
/* Linker script to configure memory regions. */
MEMORY
{
ROM (rx) : ORIGIN = ROM_BASE, LENGTH = ROM_SIZE /* see plat_addr_map.h and common.mk */
RAM (rwx) : ORIGIN = RAM_BASE, LENGTH = RAM_SIZE
RAMX (rx) : ORIGIN = RAMX_BASE, LENGTH = RAM_SIZE
}
/* Library configurations */
GROUP(libgcc.a)
/* Linker script to place sections and symbol values. Should be used together
* with other linker script that defines memory regions ROM and RAM.
* It references following symbols, which must be defined in code:
* Reset_Handler : Entry of reset handler
*
* It defines following symbols, which code can use without definition:
* __export_fn_rom
* __exec_struct_start
* __cust_cmd_init_tbl_start
* __cust_cmd_init_tbl_end
* __cust_cmd_hldr_tbl_start
* __cust_cmd_hldr_tbl_end
* __exidx_start
* __exidx_end
* __etext
* __data_start__
* __data_end__
* __bss_start__
* __bss_end__
* __end__
* end
* __HeapLimit
* __StackLimit
* __StackTop
* __stack
* __free_ram
*/
ENTRY(programmer_start)
SECTIONS
{
__export_fn_rom = (ORIGIN(ROM) + LENGTH(ROM) - ROM_BUILD_INFO_SECTION_SIZE - ROM_EXPORT_FN_SECTION_SIZE);
.vector_table (ORIGIN(RAM)) (NOLOAD) :
{
KEEP(*(.vector_table))
. = VECTOR_SECTION_SIZE;
. = ALIGN(4);
} > RAM
.reboot_param (.) (NOLOAD) :
{
KEEP(*(.reboot_param))
. = REBOOT_PARAM_SECTION_SIZE;
. = ALIGN(4);
} > RAM
.burn_buffer (.) (NOLOAD) :
{
/* The size of .burn_buffer should be greater than __rom_HeapLimit. In most cases 8K is enough. */
*(.burn_buffer)
. = MAX(., MIN_BURN_BUFFER_SIZE);
. = ALIGN(4);
} > RAM
/*
.code_dummy (.) (NOLOAD) :
{
. = CODE_MSG_OVERHEAD;
. = ALIGN(4);
} > RAM
*/
.boot_struct (.) :
{
KEEP(*(.boot_struct))
__exec_struct_start = .;
KEEP(*(.exec_struct))
. = ALIGN(4);
} > RAM
.got_info (.) :
{
__got_info_start = .;
__got_start = .;
*(.got)
. = ALIGN(4);
__got_end = .;
__got_plt_start = .;
*(.got.plt)
. = ALIGN(4);
__igot_plt_start = .;
*(.igot.plt)
. = ALIGN(4);
__dynamic_start = .;
*(.dynamic)
. = ALIGN(4);
__got_info_end = .;
} > RAM
. = RAM_TO_RAMX(.);
.text (.) : AT (RAMX_TO_RAM(ADDR(.text)))
{
*(.text*)
#ifndef NOSTD
KEEP(*(.init))
KEEP(*(.fini))
/* .ctors */
*crtbegin.o(.ctors)
*crtbegin?.o(.ctors)
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
*(SORT(.ctors.*))
*(.ctors)
/* .dtors */
*crtbegin.o(.dtors)
*crtbegin?.o(.dtors)
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
*(SORT(.dtors.*))
*(.dtors)
#endif
. = ALIGN(4);
} > RAMX
.ARM.extab (.) : AT (RAMX_TO_RAM(ADDR(.ARM.extab)))
{
*(.ARM.extab* .gnu.linkonce.armextab.*)
} > RAMX
__exidx_start = .;
/* .ARM.exidx contains R_ARM_PREL31 (+-0x40000000) offset to functions, which means
* the session location cannot be too far away from the function addresses */
.ARM.exidx (.) : AT (RAMX_TO_RAM(ADDR(.ARM.exidx)))
{
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
} > RAMX
__exidx_end = .;
. = RAMX_TO_RAM(.);
.rodata (.) :
{
*(.rodata*)
. = ALIGN(4);
__cust_cmd_init_tbl_start = .;
KEEP(*(.cust_cmd_init_tbl))
__cust_cmd_init_tbl_end = .;
. = ALIGN(4);
__cust_cmd_hldr_tbl_start = .;
KEEP(*(.cust_cmd_hldr_tbl))
__cust_cmd_hldr_tbl_end = .;
#ifndef NOSTD
KEEP(*(.eh_frame*))
#endif
*(.note.gnu.build-id)
. = ALIGN(4);
} > RAM
__etext = .;
.data (.) :
{
__data_start__ = .;
*(.data*)
. = ALIGN(4);
#ifndef NOSTD
*(vtable)
. = ALIGN(4);
/* preinit data */
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP(*(.preinit_array))
PROVIDE_HIDDEN (__preinit_array_end = .);
. = ALIGN(4);
/* init data */
PROVIDE_HIDDEN (__init_array_start = .);
KEEP(*(SORT(.init_array.*)))
KEEP(*(.init_array))
PROVIDE_HIDDEN (__init_array_end = .);
. = ALIGN(4);
/* finit data */
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP(*(SORT(.fini_array.*)))
KEEP(*(.fini_array))
PROVIDE_HIDDEN (__fini_array_end = .);
KEEP(*(.jcr*))
. = ALIGN(4);
#endif
/* All data end */
__data_end__ = .;
} > RAM
.build_info (.) :
{
KEEP(*(.build_info))
. = ALIGN(4);
} > RAM = 0x00000000
/* The following section be the last loaded section */
.code_start_addr (.) :
{
LONG(ABSOLUTE(__exec_struct_start));
} > RAM
.bss (.) (NOLOAD) :
{
. = ALIGN(4);
__bss_start__ = .;
*(.bss*)
*(COMMON)
. = ALIGN(4);
__bss_end__ = .;
} > RAM
.heap (.) (NOLOAD) :
{
. = ALIGN(8);
__HeapBase = .;
__end__ = .;
end = __end__;
. += HEAP_SECTION_SIZE;
. = ALIGN(8);
__HeapLimit = .;
} > RAM
/* .stack_dummy section doesn't contains any symbols. It is only
* used for linker to calculate size of stack sections, and assign
* values to stack symbols later */
.stack_dummy (.) (COPY) :
{
. = STACK_SECTION_SIZE;
. = ALIGN(8);
} > RAM
/* Set stack top to end of RAM, and stack limit move down by
* size of stack_dummy section */
__StackTop = ORIGIN(RAM) + LENGTH(RAM);
__StackLimit = __StackTop - SIZEOF(.stack_dummy);
PROVIDE(__stack = __StackTop);
/* Check if data + heap + stack exceeds RAM limit */
ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
__free_ram = __StackLimit - __HeapLimit;
}