diff options
Diffstat (limited to 'c/src/lib/libbsp/lm32/milkymist/startup/linkcmds')
| -rw-r--r-- | c/src/lib/libbsp/lm32/milkymist/startup/linkcmds | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/lm32/milkymist/startup/linkcmds b/c/src/lib/libbsp/lm32/milkymist/startup/linkcmds new file mode 100644 index 0000000000..490ae6093a --- /dev/null +++ b/c/src/lib/libbsp/lm32/milkymist/startup/linkcmds @@ -0,0 +1,290 @@ +OUTPUT_FORMAT("elf32-lm32", "elf32-lm32", + "elf32-lm32") +OUTPUT_ARCH(lm32) +ENTRY(_start) +/* Do we need any of these for elf? + __DYNAMIC = 0; */ + +/* + * Declare some sizes. Heap is sized at whatever ram space is left. + */ +RamBase = DEFINED(RamBase) ? RamBase : 0x40000000; +RamSize = DEFINED(RamSize) ? RamSize : 64M; +HeapSize = DEFINED(HeapSize) ? HeapSize : 2M; +_StackSize = DEFINED(_StackSize) ? _StackSize : 0x2000; + +PROVIDE (__stack = 0); +MEMORY { + sdram : ORIGIN = 0x40000000 , LENGTH = 64M +} +SECTIONS +{ + .boot : + { + KEEP (*(.boot)) + } > sdram + + /* Read-only sections, merged into text segment: */ + .interp : { *(.interp) } > sdram + .hash : { *(.hash) } > sdram + .dynsym : { *(.dynsym) } > sdram + .dynstr : { *(.dynstr) } > sdram + .gnu.version : { *(.gnu.version) } > sdram + .gnu.version_d : { *(.gnu.version_d) } > sdram + .gnu.version_r : { *(.gnu.version_r) } > sdram + .rela.text : + { *(.rela.text) *(.rela.gnu.linkonce.t*) } > sdram + .rela.data : + { *(.rela.data) *(.rela.gnu.linkonce.d*) } > sdram + .rela.rodata : + { *(.rela.rodata*) *(.rela.gnu.linkonce.r*) } > sdram + .rela.got : { *(.rela.got) } > sdram + .rela.got1 : { *(.rela.got1) } > sdram + .rela.got2 : { *(.rela.got2) } > sdram + .rela.ctors : { *(.rela.ctors) } > sdram + .rela.dtors : { *(.rela.dtors) } > sdram + .rela.init : { *(.rela.init) } > sdram + .rela.fini : { *(.rela.fini) } > sdram + .rela.bss : { *(.rela.bss) } > sdram + .rela.plt : { *(.rela.plt) } > sdram + .rela.sdata : { *(.rela.sdata) } > sdram + .rela.sbss : { *(.rela.sbss) } > sdram + .rela.sdata2 : { *(.rela.sdata2) } > sdram + .rela.sbss2 : { *(.rela.sbss2) } > sdram + .rela.dyn : { *(.rela.dyn) } > sdram + + .init : { KEEP(*(.init)) } > sdram + + .text : + { + *(.text*) + + /* + * Special FreeBSD sysctl sections. + */ + . = ALIGN (16); + __start_set_sysctl_set = .; + *(set_sysctl_*); + __stop_set_sysctl_set = ABSOLUTE(.); + *(set_domain_*); + *(set_pseudo_*); + + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + *(.gnu.linkonce.t*) + } > sdram + + .fini : { _fini = .; KEEP(*(.fini)) } > sdram + + .rodata : { *(.rodata*) *(.gnu.linkonce.r*) } > sdram + .rodata1 : { *(.rodata1) } > sdram + + /* Adjust the address for the data segment. We want to adjust up to + the same address within the page on the next page up. */ + . = ALIGN(0x10000) + (. & (0x10000 - 1)); + /* Ensure the __preinit_array_start label is properly aligned. We + could instead move the label definition inside the section, but + the linker would then create the section even if it turns out to + be empty, which isn't pretty. */ + . = ALIGN(32 / 8); + PROVIDE (__preinit_array_start = .); + .preinit_array : { *(.preinit_array) } >sdram + PROVIDE (__preinit_array_end = .); + PROVIDE (__init_array_start = .); + .init_array : { *(.init_array) } >sdram + PROVIDE (__init_array_end = .); + PROVIDE (__fini_array_start = .); + .fini_array : { *(.fini_array) } >sdram + PROVIDE (__fini_array_end = .); + +/* _SDA2_BASE_ = __SDATA2_START__ + 0xe000; */ + .sdata2 : { *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) } >sdram + .sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) + /* avoid empty sdata2/sbss2 area -- __eabi would not set up r2 + * which may be important if run-time loading is used + */ + . += 1; + } >sdram + .eh_frame : { *.(eh_frame) } >sdram + + /* NOTE: if the BSP uses page tables, the correctness of + * '_etext' (and __DATA_START__) is CRUCIAL - otherwise, + * an invalid mapping may result!!! + */ + _etext = .; + PROVIDE (etext = .); + + /* Adjust the address for the data segment. We want to adjust up to + the same address within the page on the next page up. It would + be more correct to do this: + . = ALIGN(0x40000) + (ALIGN(8) & (0x40000 - 1)); + The current expression does not correctly handle the case of a + text segment ending precisely at the end of a page; it causes the + data segment to skip a page. The above expression does not have + this problem, but it will currently (2/95) cause BFD to allocate + a single segment, combining both text and data, for this case. + This will prevent the text segment from being shared among + multiple executions of the program; I think that is more + important than losing a page of the virtual address space (note + that no actual memory is lost; the page which is skipped can not + be referenced). */ + . = ALIGN(0x1000); + .data ALIGN(0x1000) : + { + /* NOTE: if the BSP uses page tables, the correctness of + * '__DATA_START__' (and _etext) is CRUCIAL - otherwise, + * an invalid mapping may result!!! + */ + PROVIDE(__DATA_START__ = ABSOLUTE(.) ); + *(.data .data.* .gnu.linkonce.d*) + SORT(CONSTRUCTORS) + } > sdram + .data1 : { *(.data1) } > sdram + PROVIDE (__EXCEPT_START__ = .); + .gcc_except_table : { + *(.gcc_except_table) + *(.gcc_except_table.*) + } > sdram + PROVIDE (__EXCEPT_END__ = .); + .got1 : { *(.got1) } > sdram + /* Put .ctors and .dtors next to the .got2 section, so that the pointers + get relocated with -mrelocatable. Also put in the .fixup pointers. + The current compiler no longer needs this, but keep it around for 2.7.2 */ + PROVIDE (_GOT2_START_ = .); + .got2 : { *(.got2) } > sdram + .dynamic : { *(.dynamic) } > sdram + + .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)) + /* 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)) + } > sdram + .dtors : + { + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + } > sdram + + + PROVIDE (_FIXUP_START_ = .); + .fixup : { *(.fixup) } > sdram + PROVIDE (_FIXUP_END_ = .); + PROVIDE (_GOT2_END_ = .); + PROVIDE (_GOT_START_ = .); + + .got : { *(.got) } > sdram + .got.plt : { *(.got.plt) } > sdram + + PROVIDE (_GOT_END_ = .); + + .jcr : { KEEP (*(.jcr)) } > sdram + + /* We want the small data sections together, so single-instruction offsets + can access them all, and initialized data all before uninitialized, so + we can shorten the on-disk segment size. */ +/* _SDA_BASE_ = __SDATA_START__ + 0xe000; */ + .sdata : { *(.sdata*) *(.gnu.linkonce.s.*) } >sdram + _edata = .; + _gp = .; + PROVIDE (edata = .); + .sbss : + { + _clear_start = .; + PROVIDE (__sbss_start = .); + *(.dynsbss) + *(.sbss* .gnu.linkonce.sb.*) + *(.scommon) + /* avoid empty sdata/sbss area -- __eabi would not set up r13 + * which may be important if run-time loading is used + */ + . += 1; + . = ALIGN(16); + PROVIDE (__sbss_end = .); + } > sdram + .plt : { *(.plt) } > sdram + .bss : + { + PROVIDE (__bss_start = .); + *(.dynbss) + *(.bss .bss* .gnu.linkonce.b*) + *(COMMON) + . = ALIGN(16); + _end = . ; + __rtems_end = . ; + PROVIDE (end = .); + + . += _StackSize; + _fstack = .; + + WorkAreaBase = .; + + . = ALIGN (16); + _stack_init = .; + _clear_end = .; + + } > sdram + + + /DISCARD/ : + { + *(.comment) + } + + + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + + /* DWARF debug sections. + Symbols in the DWARF debugging sections are relative to the beginning + of the section so we begin them at 0. */ + /* DWARF 1 */ + .debug 0 : { *(.debug) } + .line 0 : { *(.line) } + + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : { *(.debug_srcinfo) } + .debug_sfnames 0 : { *(.debug_sfnames) } + + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : { *(.debug_aranges) } + .debug_pubnames 0 : { *(.debug_pubnames) } + + /* DWARF 2 */ + .debug_info 0 : { *(.debug_info) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_line 0 : { *(.debug_line) } + .debug_frame 0 : { *(.debug_frame) } + .debug_str 0 : { *(.debug_str) } + .debug_loc 0 : { *(.debug_loc) } + .debug_macinfo 0 : { *(.debug_macinfo) } + + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : { *(.debug_weaknames) } + .debug_funcnames 0 : { *(.debug_funcnames) } + .debug_typenames 0 : { *(.debug_typenames) } + .debug_varnames 0 : { *(.debug_varnames) } + /* These must appear regardless of . */ +} |