264 lines
7.1 KiB
Plaintext
Executable File
264 lines
7.1 KiB
Plaintext
Executable File
/*
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* The MEMORY command describes the location and size of blocks of memory
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* in the target. You can use it to describe which memory regions may be
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* used by the linker, and which memory regions it must avoid.
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*/
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MEMORY
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{
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/*
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* Memory with CPU cache.
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*6M CPU SRAM
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*/
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ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = (6 * 1024 * 1024)
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/*
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* Memory without CPU cache
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* 6M CPU SRAM
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*/
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ram_nocache (wxa!ri) : ORIGIN = 0x40000000, LENGTH = (6 * 1024 * 1024)
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}
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PROVIDE( _rom_start = ORIGIN(rom) );
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PROVIDE( _rom_end = ORIGIN(rom) + LENGTH(rom) );
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PROVIDE( _ram_start = ORIGIN(ram) );
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PROVIDE( _ram_end = ORIGIN(ram) + LENGTH(ram) );
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PROVIDE( _io_start = 0x40000000 );
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PROVIDE( _io_end = _io_start + LENGTH(ram) );
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PROVIDE( _stack_size = 1 << 15 );
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/*
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* The OUTPUT_ARCH command specifies the machine architecture where the
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* argument is one of the names used in the Kendryte library.
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*/
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OUTPUT_ARCH( "riscv" )
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/*
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* The ENTRY command specifies the entry point (ie. first instruction to
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* execute). The symbol _start is defined in crt0.S
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*/
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ENTRY(_start)
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/*
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* The GROUP command is special since the listed archives will be
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* searched repeatedly until there are no new undefined references. We
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* need this since -lc depends on -lgloss and -lgloss depends on -lc. I
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* thought gcc would automatically include -lgcc when needed, but
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* in this file includes it explicitly here and I was seeing link errors
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* without it.
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*/
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/* GROUP( -lc -lgloss -lgcc ) */
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/*
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* The linker only pays attention to the PHDRS command when generating
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* an ELF output file. In other cases, the linker will simply ignore PHDRS.
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*/
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PHDRS
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{
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ram_ro PT_LOAD;
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ram_init PT_LOAD;
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ram PT_NULL;
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}
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/*
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* This is where we specify how the input sections map to output
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* sections.
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*/
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SECTIONS
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{
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/* Program code segment, also known as a text segment */
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.text :
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{
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PROVIDE( _text = ABSOLUTE(.) );
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/* Initialization code segment */
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KEEP( *(.text.start) )
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KEEP( *(.text.systick) )
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*(.text.unlikely .text.unlikely.*)
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*(.text.startup .text.startup.*)
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/* Normal code segment */
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*(.text .text.*)
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*(.gnu.linkonce.t.*)
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. = ALIGN(8);
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PROVIDE( _etext = ABSOLUTE(.) );
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} >ram AT>ram :ram_ro
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/* Read-only data segment */
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.rodata :
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{
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*(.rdata)
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*(.rodata .rodata.*)
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*(.gnu.linkonce.r.*)
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} >ram AT>ram :ram_ro
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. = ALIGN(8);
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/* Exception handling */
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.eh_frame :
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{
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KEEP (*(.eh_frame)) *(.eh_frame.*)
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. = ALIGN(8);
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} >ram AT>ram :ram_ro
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.gnu_extab : { *(.gnu_extab) } >ram AT>ram :ram_ro
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.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) } >ram AT>ram :ram_ro
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.exception_ranges : { *(.exception_ranges .exception_ranges*) } >ram AT>ram :ram_ro
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/* Init array and fini array */
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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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} >ram AT>ram :ram_ro
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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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} >ram AT>ram :ram_ro
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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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} >ram AT>ram :ram_ro
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.ctors :
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{
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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/* We don't want to include the .ctor section from
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the crtend.o file until after the sorted ctors.
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The .ctor section from the crtend file contains the
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end of ctors marker and it must be last */
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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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} >ram AT>ram :ram_ro
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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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} >ram AT>ram :ram_ro
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. = ALIGN(8);
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.lalign :
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{
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. = ALIGN(8);
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PROVIDE( _data_lma = . );
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} >ram AT>ram :ram_ro
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.dalign :
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{
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. = ALIGN(8);
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PROVIDE( _data = . );
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} >ram AT>ram :ram_init
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. = ALIGN(8);
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/* .data, .sdata and .srodata segment */
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.data :
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{
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/* Writable data segment (.data segment) */
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*(.data .data.*)
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*(.gnu.linkonce.d.*)
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/* Have _gp point to middle of sdata/sbss to maximize displacement range */
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. = ALIGN(8);
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PROVIDE( __global_pointer$ = ABSOLUTE(.) + 0x800);
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/* Writable small data segment (.sdata segment) */
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*(.sdata .sdata.*)
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*(.gnu.linkonce.s.*)
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/* Read-only small data segment (.srodata segment) */
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. = ALIGN(8);
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*(.srodata.cst16)
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*(.srodata.cst8)
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*(.srodata.cst4)
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*(.srodata.cst2)
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*(.srodata .srodata.*)
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/* Align _edata to cache line size */
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. = ALIGN(64);
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PROVIDE( _edata = ABSOLUTE(.) );
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} >ram AT>ram :ram_init
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/* .bss and .sbss segment */
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.bss :
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{
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PROVIDE( _bss = ABSOLUTE(.) );
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/* Writable uninitialized small data segment (.sbss segment)*/
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*(.sbss .sbss.*)
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*(.gnu.linkonce.sb.*)
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*(.scommon)
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/* Uninitialized writeable data section (.bss segment)*/
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*(.bss .bss.*)
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*(.gnu.linkonce.b.*)
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*(COMMON)
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. = ALIGN(8);
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PROVIDE( _ebss = ABSOLUTE(.) );
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} >ram AT>ram :ram
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PROVIDE( _tls_data = ABSOLUTE(.) );
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/*
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* Thread Local Storage (TLS) are per-thread global variables.
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* Compilers such as GCC provide a __thread keyword to mark global
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* variables as per-thread. Support is required in the program loader
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* and thread creator.
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*/
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/* Thread-local data segment, .tdata (initialized tls). */
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.tdata :
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{
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KEEP( *(.tdata.begin) )
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*(.tdata .tdata.*)
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*(.gnu.linkonce.td.*)
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KEEP( *(.tdata.end) )
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} >ram AT>ram :ram
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/* Thread-local bss segment, .tbss (zero-initialized tls). */
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.tbss :
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{
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*(.tbss .tbss.*)
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*(.gnu.linkonce.tb.*)
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KEEP( *(.tbss.end) )
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} >ram AT>ram :ram
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/*
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* End of uninitalized data segement
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*
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* Actually the stack needs 16B alignment, and it won't hurt to also slightly
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* increase the alignment to 32 or even 64 (cache line size).
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*
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* Align _heap_start to cache line size
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*/
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. = ALIGN(64);
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PROVIDE( _end = ABSOLUTE(.) );
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/* Leave 2 holes for stack & TLS, the size can set in kconfig */
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PROVIDE( _heap_start = ABSOLUTE(.) + _stack_size * 2 );
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PROVIDE( _tp0 = (_end + 63) & (-64) );
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PROVIDE( _tp1 = _tp0 + _stack_size );
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PROVIDE( _sp0 = _tp0 + _stack_size );
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PROVIDE( _sp1 = _tp1 + _stack_size );
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/* Heap end is at the end of memory, the memory size can set in kconfig */
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PROVIDE( _heap_end = _ram_end);
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}
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