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发表于 2014-11-19 15:24:02
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你好，我参照上面的程序，现在程序是运行起来了。但是有一个疑问。
在上面的例子中的Ld文件增加了如下内容，
___MYRAMCodeStart = ___ROM_AT + SIZEOF(.app_data) + SIZEOF(.romp) ;
.copyToRAM : AT(___MYRAMCodeStart)
{
. = ALIGN (0x4);
___MYRAMStart = .;
*(.myCodeInRAM)
___MYRAMEnd = .;
. = ALIGN (0x4);
} > myram
___MYRAMCodeSize = ___MYRAMEnd - ___MYRAMStart;
我copy到我的工程的ld文件中。结果编译错误，我就改为了
___MYRAMCodeStart = ___ROM_AT + SIZEOF(.romp) ;
.copyToRAM : AT(___MYRAMCodeStart)
{
. = ALIGN (0x4);
___MYRAMStart = .;
*(.myCodeInRAM)
___MYRAMEnd = .;
. = ALIGN (0x4);
} > myram
___MYRAMCodeSize = ___MYRAMEnd - ___MYRAMStart;
然后，就可以通过，并运行了。
我的问题就是___MYRAMCodeStart = ___ROM_AT + SIZEOF(.romp) ; 要怎样写？随便写都可以吗？有什么规则？
下面是我的整个ld文件：
/*
*****************************************************************************
**
** File : KL05Z32M4_flash.ld
**
** Default linker command file for Flash targets
**
*****************************************************************************
*/
/* Entry Point */
ENTRY(__thumb_startup)
/* Highest address of the user mode stack */
_estack = 0x20000C00; /* end of SRAM */
__SP_INIT = _estack;
/* Generate a link error if heap and stack don't fit into RAM */
__heap_size = 0x100; /* required amount of heap */
__stack_size = 0x100; /* required amount of stack */
/* Specify the memory areas */
MEMORY
{
m_interrupts (rx) : ORIGIN = 0x00000000, LENGTH = 0xC0
m_cfmprotrom (rx) : ORIGIN = 0x00000400, LENGTH = 0x10
m_text (rx) : ORIGIN = 0x00000800, LENGTH = 32K - 0x800
m_data (rwx) : ORIGIN = 0x1FFFFC00, LENGTH = 3K /* SRAM */
myram (rwx) : ORIGIN = 0x20000800, LENGTH = 1K /* SRAM */
}
/* Define output sections */
SECTIONS
{
/* The startup code goes first into Flash */
.interrupts :
{
__vector_table = .;
. = ALIGN(4);
KEEP(*(.vectortable)) /* Startup code */
. = ALIGN(4);
} > m_interrupts
.cfmprotect :
{
. = ALIGN(4);
KEEP(*(.cfmconfig)) /* Flash Configuration Field (FCF) */
. = ALIGN(4);
} > m_cfmprotrom
/* The program code and other data goes into Flash */
.text :
{
. = ALIGN(4);
*(.text) /* .text sections (code) */
*(.text*) /* .text* sections (code) */
*(.rodata) /* .rodata sections (constants, strings, etc.) */
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
*(.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 */
} > m_text
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } > m_text
.ARM : {
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} > m_text
.ctors :
{
__CTOR_LIST__ = .;
/* gcc uses crtbegin.o to find the start of
the constructors, so we make sure it is
first. Because this is a wildcard, it
doesn't matter if the user does not
actually link against crtbegin.o; the
linker won't look for a file to match a
wildcard. The wildcard also means that it
doesn't matter which directory crtbegin.o
is in. */
KEEP (*crtbegin.o(.ctors))
/* We don't want to include the .ctor section from
from the crtend.o file until after the sorted ctors.
The .ctor section from the crtend file contains the
end of ctors marker and it must be last */
KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
__CTOR_END__ = .;
} > m_text
.dtors :
{
__DTOR_LIST__ = .;
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
__DTOR_END__ = .;
} > m_text
.preinit_array :
{
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP (*(.preinit_array*))
PROVIDE_HIDDEN (__preinit_array_end = .);
} > m_text
.init_array :
{
PROVIDE_HIDDEN (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array*))
PROVIDE_HIDDEN (__init_array_end = .);
} > m_text
.fini_array :
{
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP (*(SORT(.fini_array.*)))
KEEP (*(.fini_array*))
PROVIDE_HIDDEN (__fini_array_end = .);
___ROM_AT = .;
} > m_text
/* reserve MTB memory at the beginning of m_data */
.mtb : /* MTB buffer address as defined by the hardware */
{
. = ALIGN(8);
_mtb_start = .;
KEEP(*(.mtb_buf)) /* need to KEEP Micro Trace Buffer as not referenced by application */
. = ALIGN(8);
_mtb_end = .;
} > m_data
/* Initialized data sections goes into RAM, load LMA copy after code */
.data : AT(___ROM_AT)
{
. = ALIGN(4);
_sdata = .; /* create a global symbol at data start */
*(.data) /* .data sections */
*(.data*) /* .data* sections */
. = ALIGN(4);
_edata = .; /* define a global symbol at data end */
} > m_data
___data_size = _edata - _sdata;
/* Uninitialized data section */
. = ALIGN(4);
.bss :
{
/* This is used by the startup in order to initialize the .bss section */
__START_BSS = .;
PROVIDE ( __bss_start__ = __START_BSS );
*(.bss)
*(.bss*)
*(COMMON)
. = ALIGN(4);
__END_BSS = .;
PROVIDE ( __bss_end__ = __END_BSS );
} > m_data
_romp_at = ___ROM_AT + SIZEOF(.data);
.romp : AT(_romp_at)
{
__S_romp = _romp_at;
LONG(___ROM_AT);
LONG(_sdata);
LONG(___data_size);
LONG(0);
LONG(0);
LONG(0);
} > m_data
/* User_heap_stack section, used to check that there is enough RAM left */
._user_heap_stack :
{
. = ALIGN(4);
PROVIDE ( end = . );
PROVIDE ( _end = . );
__heap_addr = .;
. = . + __heap_size;
. = . + __stack_size;
. = ALIGN(4);
} > m_data
___MYRAMCodeStart = ___ROM_AT + SIZEOF(.romp) ;
.copyToRAM : AT(___MYRAMCodeStart)
{
. = ALIGN (0x4);
___MYRAMStart = .;
*(.myCodeInRAM)
___MYRAMEnd = .;
. = ALIGN (0x4);
} > myram
___MYRAMCodeSize = ___MYRAMEnd - ___MYRAMStart;
.ARM.attributes 0 : { *(.ARM.attributes) }
}
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发表于 2014-11-18 10:56:18
沉默卡
照妖镜
