My modifications to make life easier.
Signed-off-by: Yilin Sun <imi415@imi.moe>
This commit is contained in:
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148
Ld/Link.ld
148
Ld/Link.ld
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@ -1 +1,147 @@
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ENTRY( _start )
__stack_size = 2048;
PROVIDE( _stack_size = __stack_size );
MEMORY
{
FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 62K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
}
SECTIONS
{
.init :
{
_sinit = .;
. = ALIGN(4);
KEEP(*(SORT_NONE(.init)))
. = ALIGN(4);
_einit = .;
} >FLASH AT>FLASH
.vector :
{
*(.vector);
. = ALIGN(64);
} >FLASH AT>FLASH
.text :
{
. = ALIGN(4);
*(.text)
*(.text.*)
*(.rodata)
*(.rodata*)
*(.gnu.linkonce.t.*)
. = ALIGN(4);
} >FLASH AT>FLASH
.fini :
{
KEEP(*(SORT_NONE(.fini)))
. = ALIGN(4);
} >FLASH AT>FLASH
PROVIDE( _etext = . );
PROVIDE( _eitcm = . );
.preinit_array :
{
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP (*(.preinit_array))
PROVIDE_HIDDEN (__preinit_array_end = .);
} >FLASH AT>FLASH
.init_array :
{
PROVIDE_HIDDEN (__init_array_start = .);
KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
PROVIDE_HIDDEN (__init_array_end = .);
} >FLASH AT>FLASH
.fini_array :
{
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
PROVIDE_HIDDEN (__fini_array_end = .);
} >FLASH AT>FLASH
.ctors :
{
/* 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))
KEEP (*crtbegin?.o(.ctors))
/* We don't want to include the .ctor section 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 *crtend?.o ) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
} >FLASH AT>FLASH
.dtors :
{
KEEP (*crtbegin.o(.dtors))
KEEP (*crtbegin?.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
} >FLASH AT>FLASH
.dalign :
{
. = ALIGN(4);
PROVIDE(_data_vma = .);
} >RAM AT>FLASH
.dlalign :
{
. = ALIGN(4);
PROVIDE(_data_lma = .);
} >FLASH AT>FLASH
.data :
{
*(.gnu.linkonce.r.*)
*(.data .data.*)
*(.gnu.linkonce.d.*)
. = ALIGN(8);
PROVIDE( __global_pointer$ = . + 0x800 );
*(.sdata .sdata.*)
*(.sdata2.*)
*(.gnu.linkonce.s.*)
. = ALIGN(8);
*(.srodata.cst16)
*(.srodata.cst8)
*(.srodata.cst4)
*(.srodata.cst2)
*(.srodata .srodata.*)
. = ALIGN(4);
PROVIDE( _edata = .);
} >RAM AT>FLASH
.bss :
{
. = ALIGN(4);
PROVIDE( _sbss = .);
*(.sbss*)
*(.gnu.linkonce.sb.*)
*(.bss*)
*(.gnu.linkonce.b.*)
*(COMMON*)
. = ALIGN(4);
PROVIDE( _ebss = .);
} >RAM AT>FLASH
PROVIDE( _end = _ebss);
PROVIDE( end = . );
.stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
{
PROVIDE( _heap_end = . );
. = ALIGN(4);
PROVIDE(_susrstack = . );
. = . + __stack_size;
PROVIDE( _eusrstack = .);
} >RAM
}
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ENTRY( _start )
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/* Configure heap and stack space reserved for application.
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* Too low may cause standard library failed,
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* too high may cause SRAM overflow.
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* Collision may occur with heap when stack gets too deep.
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*/
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__stack_size = 2048;
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__heap_size = 2048;
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 62K
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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SECTIONS
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{
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.init :
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{
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. = ALIGN(4);
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KEEP(*(SORT_NONE(.init)))
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. = ALIGN(4);
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} >FLASH
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.vectors :
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{
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. = ALIGN(4);
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KEEP(*(SORT_NONE(.vectors)))
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. = ALIGN(4);
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} >FLASH
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.text :
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{
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. = ALIGN(4);
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_stext = .;
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*(.text)
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*(.text.*)
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*(.gnu.linkonce.t.*)
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*(.rodata)
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*(.rodata*)
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*(.gnu.linkonce.r.*)
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. = ALIGN(4);
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_etext = .;
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} >FLASH
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.preinit_array :
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{
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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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} >FLASH
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
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PROVIDE_HIDDEN (__init_array_end = .);
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} >FLASH
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >FLASH
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.ctors :
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{
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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} >FLASH
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*crtbegin?.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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} >FLASH
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_sidata = LOADADDR(.data);
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.data :
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{
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. = ALIGN(4);
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_sdata = .;
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*(.data .data.*)
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*(.gnu.linkonce.d.*)
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*(.sdata .sdata.*)
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*(.srodata .srodata.*)
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*(.gnu.linkonce.s.*)
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. = ALIGN(4);
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_edata = .;
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} >RAM AT>FLASH
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. = ALIGN(16);
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PROVIDE( __global_pointer$ = . );
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.bss :
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{
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. = ALIGN(4);
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_sbss = .;
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*(.sbss)
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*(.sbss.*)
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*(.gnu.linkonce.sb.*)
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*(.bss)
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*(.bss.*)
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*(.gnu.linkonce.b.*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .;
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} >RAM
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.heap_stack :
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{
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. = ALIGN(8);
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_end = .;
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PROVIDE(end = . );
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. = . + __heap_size;
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. = ALIGN(8);
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PROVIDE(_heap_end = .);
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. = . + __stack_size;
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. = ALIGN(8);
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} >RAM
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/* Place initial SP to the end of SRAM */
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__stack_top = ORIGIN(RAM) + LENGTH(RAM);
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PROVIDE(_eusrstack = __stack_top);
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}
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@ -183,8 +183,8 @@ handle_reset:
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la sp, _eusrstack
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2:
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/* Load data section from flash to RAM */
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la a0, _data_lma
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la a1, _data_vma
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la a0, _sidata
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la a1, _sdata
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la a2, _edata
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bgeu a1, a2, 2f
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1:
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@ -207,7 +207,9 @@ handle_reset:
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csrw 0xbc0, t0
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/* Enable nested and hardware stack */
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li t0, 0x3
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/* li t0, 0x3 */
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/* Enable nested interrupt, disable hardware stack */
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li t0, 0x02
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csrw 0x804, t0
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/* Enable interrupt */
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