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sys/boot/arm64/uboot/ldscript.aarch64
| /* $FreeBSD$ */ | |||||
| OUTPUT_ARCH(aarch64) | |||||
| ENTRY(_start) | |||||
| SECTIONS | |||||
| { | |||||
| /* Read-only sections, merged into text segment: */ | |||||
| . = UBLDR_LOADADDR + SIZEOF_HEADERS; | |||||
| .text : | |||||
| { | |||||
| *(.text) | |||||
| /* .gnu.warning sections are handled specially by elf32.em. */ | |||||
skibo: I should put in a comment in why I do this. The position-independent code isn't really… | |||||
| *(.gnu.warning) | |||||
| *(.gnu.linkonce.t*) | |||||
| } =0 | |||||
| _etext = .; | |||||
| PROVIDE (etext = .); | |||||
| .interp : { *(.interp) } | |||||
| .hash : { *(.hash) } | |||||
| .dynsym : { *(.dynsym) } | |||||
| .dynstr : { *(.dynstr) } | |||||
| .gnu.version : { *(.gnu.version) } | |||||
| .gnu.version_d : { *(.gnu.version_d) } | |||||
| .gnu.version_r : { *(.gnu.version_r) } | |||||
| .rela.text : | |||||
| { *(.rela.text) *(.rela.gnu.linkonce.t*) } | |||||
| .rela.data : | |||||
| { *(.rela.data) *(.rela.gnu.linkonce.d*) } | |||||
| .rela.rodata : | |||||
| { *(.rela.rodata) *(.rela.gnu.linkonce.r*) } | |||||
| .rela.got : { *(.rela.got) } | |||||
| .rela.got1 : { *(.rela.got1) } | |||||
| .rela.got2 : { *(.rela.got2) } | |||||
| .rela.ctors : { *(.rela.ctors) } | |||||
| .rela.dtors : { *(.rela.dtors) } | |||||
| .rela.init : { *(.rela.init) } | |||||
| .rela.fini : { *(.rela.fini) } | |||||
| .rela.bss : { *(.rela.bss) } | |||||
| .rela.plt : { *(.rela.plt) } | |||||
| .rela.sdata : { *(.rela.sdata) } | |||||
| .rela.sbss : { *(.rela.sbss) } | |||||
| .rela.sdata2 : { *(.rela.sdata2) } | |||||
| .rela.sbss2 : { *(.rela.sbss2) } | |||||
| .init : { *(.init) } =0 | |||||
| .fini : { *(.fini) } =0 | |||||
| .rodata : { *(.rodata) *(.gnu.linkonce.r*) } | |||||
| .rodata1 : { *(.rodata1) } | |||||
| .sdata2 : { *(.sdata2) } | |||||
| .sbss2 : { *(.sbss2) } | |||||
| /* Adjust the address for the data segment to the next page up. */ | |||||
| . = ((. + 0x1000) & ~(0x1000 - 1)); | |||||
andrewUnsubmitted Not Done Inline ActionsThis is probably bogus, there is no need to align to a page boundary unless we are using the MMU to map different sections, e.g. to make data non-executable. andrew: This is probably bogus, there is no need to align to a page boundary unless we are using the… | |||||
skiboAuthorUnsubmitted Not Done Inline ActionsOk. Removed and still works. skibo: Ok. Removed and still works. | |||||
| .data : | |||||
| { | |||||
| *(.data) | |||||
| *(.gnu.linkonce.d*) | |||||
| CONSTRUCTORS | |||||
| } | |||||
| .data1 : { *(.data1) } | |||||
| .got1 : { *(.got1) } | |||||
| .dynamic : { *(.dynamic) } | |||||
| /* 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) } | |||||
| PROVIDE (__CTOR_LIST__ = .); | |||||
| .ctors : { *(.ctors) } | |||||
| PROVIDE (__CTOR_END__ = .); | |||||
| PROVIDE (__DTOR_LIST__ = .); | |||||
| .dtors : { *(.dtors) } | |||||
| PROVIDE (__DTOR_END__ = .); | |||||
| PROVIDE (_FIXUP_START_ = .); | |||||
| .fixup : { *(.fixup) } | |||||
| PROVIDE (_FIXUP_END_ = .); | |||||
| PROVIDE (_GOT2_END_ = .); | |||||
| PROVIDE (_GOT_START_ = .); | |||||
| .got : { *(.got) } | |||||
| .got.plt : { *(.got.plt) } | |||||
| PROVIDE (_GOT_END_ = .); | |||||
| /* 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. */ | |||||
| .sdata : { *(.sdata) } | |||||
| _edata = .; | |||||
| PROVIDE (edata = .); | |||||
| .sbss : | |||||
| { | |||||
| PROVIDE (__sbss_start = .); | |||||
| *(.sbss) | |||||
| *(.scommon) | |||||
| *(.dynsbss) | |||||
| PROVIDE (__sbss_end = .); | |||||
| } | |||||
| .plt : { *(.plt) } | |||||
| .bss : | |||||
| { | |||||
| PROVIDE (__bss_start = .); | |||||
| *(.dynbss) | |||||
| *(.bss) | |||||
| *(COMMON) | |||||
| } | |||||
| _end = . ; | |||||
| PROVIDE (end = .); | |||||
| /* Stabs debugging sections. */ | |||||
| .stab 0 : { *(.stab) } | |||||
| .stabstr 0 : { *(.stabstr) } | |||||
| /* 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 . */ | |||||
| } | |||||
I should put in a comment in why I do this. The position-independent code isn't really position-independent. Because of the way adrp instructions work, binaries must be relocated on 4K boundaries. Starting the text section at 4K ensures that the 4K boundaries remain the same after the header is stripped to produce ubldr.bin. I found a -mcmodel=tiny option which gets rid of the adrp instructions but then it fails to link so I decided to punt.