272 lines
7.9 KiB
Plaintext
272 lines
7.9 KiB
Plaintext
/*
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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( _ram_end = ORIGIN(ram) + LENGTH(ram) );
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PROVIDE( _stack_size = 1 << 16 );
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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 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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DATA PT_LOAD;
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DYN_DATA 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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.text.start :
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{
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KEEP( *(.text.start) )
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KEEP( *(.text.systick) )
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} > ram : DATA
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.init :
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{
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KEEP (*(SORT_NONE(.init)))
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} > ram : DATA
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. = ALIGN(8);
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. = .;
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.text :
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{
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*(.text.unlikely .text.*_unlikely .text.unlikely.*)
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*(.text.exit .text.exit.*)
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*(.text.startup .text.startup.*)
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*(.text.hot .text.hot.*)
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*(.text .stub .text.* .gnu.linkonce.t.*)
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/* .gnu.warning sections are handled specially by elf32.em. */
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*(.gnu.warning)
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} > ram : DATA
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.fini :
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{
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KEEP (*(SORT_NONE(.fini)))
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} > ram : DATA
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PROVIDE (__etext = .);
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PROVIDE (_etext = .);
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PROVIDE (etext = .);
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.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } > ram : DATA
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.rodata1 : { *(.rodata1) } > ram : DATA
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.sdata2 :
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{
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*(.sdata2 .sdata2.* .gnu.linkonce.s2.*)
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} > ram : DATA
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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 : DATA
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.gnu_extab : { *(.gnu_extab) } > ram : DATA
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.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) } > ram : DATA
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.exception_ranges : { *(.exception_ranges .exception_ranges*) } > ram : DATA
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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 : DATA
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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 : DATA
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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 : DATA
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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 : DATA
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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 : DATA
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. = ALIGN(64);
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.data :
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{
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*(.data .data.* .gnu.linkonce.d.*)
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SORT(CONSTRUCTORS)
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} > ram : DATA
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.data1 : { *(.data1) } > ram : DATA
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/* We want the small data sections together, so single-instruction offsets
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can access them all, and initialized data all before uninitialized, so
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we can shorten the on-disk segment size. */
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.sdata :
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{
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__global_pointer$ = . + 0x800;
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*(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata .srodata.*)
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*(.sdata .sdata.* .gnu.linkonce.s.*)
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} > ram : DATA
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_edata = .; PROVIDE (edata = .);
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. = ALIGN(8);
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. = .;
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__bss_start = .;
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.sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) } > ram : DYN_DATA
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.sbss :
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{
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*(.dynsbss)
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*(.sbss .sbss.* .gnu.linkonce.sb.*)
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*(.scommon)
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} > ram : DYN_DATA
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.bss :
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{
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*(.dynbss)
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*(.bss .bss.* .gnu.linkonce.b.*)
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*(COMMON)
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/* Align here to ensure that the .bss section occupies space up to
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_end. Align after .bss to ensure correct alignment even if the
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.bss section disappears because there are no input sections.
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FIXME: Why do we need it? When there is no .bss section, we don't
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pad the .data section. */
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. = ALIGN(. != 0 ? 64 / 8 : 1);
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} > ram : DYN_DATA
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__bss_end = .;
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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 : DATA
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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 : DYN_DATA
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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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_end = .; 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 * 5 );
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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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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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/* DWARF debug sections.
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* Symbols in the DWARF debugging sections are relative to the beginning
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* of the section so we begin them at 0. */
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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}
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