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Refactor exosphère's linker script

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To properly separate text/rodata/data+bss, page-alignment needs to be added, as well as some symbol definitions and support code...
This commit is contained in:
TuxSH 2018-05-27 00:36:41 +02:00
parent d57f4c54a9
commit ad5be3cae5
1 changed files with 75 additions and 63 deletions
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138
exosphere/linker.ld
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@ -1,9 +1,21 @@
OUTPUT_ARCH(aarch64) OUTPUT_ARCH(aarch64)
ENTRY(__start_cold) ENTRY(__start_cold)
PHDRS
{
ccrt0 PT_LOAD FLAGS(7) /* Read | Write | Execute */;
pk2ldr PT_LOAD FLAGS(7) /* Read | Write | Execute */;
wcrt0 PT_LOAD FLAGS(7) /* Read | Write | Execute */;
code PT_LOAD FLAGS(5) /* Read | Execute */;
rodata PT_LOAD FLAGS(4) /* Read */;
data PT_LOAD FLAGS(6) /* Read | Write */;
evt PT_LOAD FLAGS(5) /* Read | Execute */;
}
MEMORY MEMORY
{ {
NULL : ORIGIN = 0, LENGTH = 4K
ccrt0 : ORIGIN = 0x040006000, LENGTH = 4K ccrt0 : ORIGIN = 0x040006000, LENGTH = 4K
glob : ORIGIN = 0x040020000, LENGTH = 128K glob : ORIGIN = 0x040020000, LENGTH = 128K
tzram : ORIGIN = 0x07C010000, LENGTH = 64K tzram : ORIGIN = 0x07C010000, LENGTH = 64K
@ -12,19 +24,19 @@ MEMORY
Normally the main code immediately follows the warmboot crt0, aligned to 256 bytes. Normally the main code immediately follows the warmboot crt0, aligned to 256 bytes.
We can't ensure or replicate that behavior properly so we'll just give 2K to the warmboot crt0. We can't ensure or replicate that behavior properly so we'll just give 2K to the warmboot crt0.
*/ */
warmboot_crt0 : ORIGIN = ORIGIN(tzram) + 12K, LENGTH = 2K wcrt0 : ORIGIN = ORIGIN(tzram) + 12K, LENGTH = 2K
/* 8K are the MMU L2 and L3 tables & 2K from the evt page */ /* 8K are the MMU L2 and L3 tables & 2K from the evt page */
main : ORIGIN = 0x1F01E0000 + LENGTH(warmboot_crt0), LENGTH = LENGTH(tzram) - LENGTH(pk2ldr) - LENGTH(evt) - LENGTH(warmboot_crt0) - 10K main : ORIGIN = 0x1F01E0000 + LENGTH(wcrt0), LENGTH = LENGTH(tzram) - LENGTH(pk2ldr) - LENGTH(evt) - LENGTH(wcrt0) - 10K
pk2ldr : ORIGIN = ORIGIN(main) - LENGTH(warmboot_crt0) + LENGTH(tzram), LENGTH = 8K pk2ldr : ORIGIN = ORIGIN(main) - LENGTH(wcrt0) + LENGTH(tzram), LENGTH = 8K
/* The first half of the page are exception entry stacks, the other half are the vectors themselves */ /* The first half of the page are exception entry stacks, the other half are the vectors themselves */
evt : ORIGIN = ORIGIN(pk2ldr) + 40K + 2K, LENGTH = 2K evt : ORIGIN = ORIGIN(pk2ldr) + 40K + 2K, LENGTH = 2K
} }
SECTIONS SECTIONS
{ {
PROVIDE(__start__ = 0x040006000); PROVIDE(__start__ = 0x040006000);
. = __start__; . = ABSOLUTE(__start__);
.cold_crt0 : .cold_crt0 :
{ {
@ -43,7 +55,7 @@ SECTIONS
coldboot_init.o(.bss* COMMON) coldboot_init.o(.bss* COMMON)
. = ALIGN(64); . = ALIGN(64);
__cold_crt0_end__ = ABSOLUTE(.); __cold_crt0_end__ = ABSOLUTE(.);
} >ccrt0 AT>glob } >ccrt0 AT>glob :ccrt0
.pk2ldr : .pk2ldr :
{ {
@ -53,17 +65,17 @@ SECTIONS
KEEP (package2.o(.text*)) KEEP (package2.o(.text*))
package2.o(.rodata*) package2.o(.rodata*)
package2.o(.data*) package2.o(.data*)
. = ALIGN(8); . = ALIGN(32);
} >pk2ldr AT>glob } >pk2ldr AT>glob :pk2ldr
.pk2ldr.bss : .pk2ldr.bss (NOLOAD) :
{ {
. = ALIGN(8); . = ALIGN(32);
__pk2ldr_bss_start__ = ABSOLUTE(.); __pk2ldr_bss_start__ = ABSOLUTE(.);
package2.o(.bss* COMMON) package2.o(.bss* COMMON)
. = ALIGN(8); . = ALIGN(32);
__pk2ldr_end__ = ABSOLUTE(.); __pk2ldr_end__ = ABSOLUTE(.);
} >pk2ldr AT>glob } >pk2ldr :NONE
.vectors : .vectors :
{ {
@ -73,7 +85,7 @@ SECTIONS
KEEP (*(.vectors*)) KEEP (*(.vectors*))
. = ALIGN(8); . = ALIGN(8);
__vectors_end__ = ABSOLUTE(.); __vectors_end__ = ABSOLUTE(.);
} >evt AT>glob } >evt AT>glob :evt
.warm_crt0 : .warm_crt0 :
{ {
@ -92,7 +104,9 @@ SECTIONS
warmboot_init.o(.bss*) warmboot_init.o(.bss*)
. = ALIGN(64); . = ALIGN(64);
__warmboot_crt0_end__ = ABSOLUTE(.); __warmboot_crt0_end__ = ABSOLUTE(.);
} >warmboot_crt0 AT>glob } >wcrt0 AT>glob :wcrt0
/* =========== CODE section =========== */
.text : .text :
{ {
@ -104,47 +118,64 @@ SECTIONS
*(.text.startup .text.startup.*) *(.text.startup .text.startup.*)
*(.text.hot .text.hot.*) *(.text.hot .text.hot.*)
*(.text .stub .text.* .gnu.linkonce.t.*) *(.text .stub .text.* .gnu.linkonce.t.*)
. = ALIGN(8); . = ALIGN(32);
} >main AT>glob } >main AT>glob :code
.init : .init :
{ {
KEEP( *(.init) ) KEEP( *(.init) )
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :code
.plt : .plt :
{ {
*(.plt) *(.plt)
*(.iplt) *(.iplt)
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :code
.fini : .fini :
{ {
KEEP( *(.fini) ) KEEP( *(.fini) )
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :code
/* =========== RODATA section =========== */
.rodata : .rodata :
{ {
*(.rodata .rodata.* .gnu.linkonce.r.*) *(.rodata .rodata.* .gnu.linkonce.r.*)
SORT(CONSTRUCTORS)
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :rodata
.got : { __got_start__ = ABSOLUTE(.); *(.got) *(.igot) } >main AT>glob .eh_frame_hdr : ONLY_IF_RO { *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*) } >main AT>glob :rodata
.got.plt : { *(.got.plt) *(.igot.plt) __got_end__ = ABSOLUTE(.);} >main AT>glob .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) *(.eh_frame.*) } >main AT>glob :rodata
.gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) } >main AT>glob :rodata
.gnu_extab : ONLY_IF_RO { *(.gnu_extab*) } >main AT>glob :rodata
.exception_ranges : ONLY_IF_RO { *(.exception_ranges .exception_ranges*) } >main AT>glob :rodata
.preinit_array : .note.gnu.build-id : { *(.note.gnu.build-id) } >main AT>glob :rodata
.hash : { *(.hash) } >main AT>glob :rodata
.gnu.hash : { *(.gnu.hash) } >main AT>glob :rodata
.gnu.version : { *(.gnu.version) } >main AT>glob :rodata
.gnu.version_d : { *(.gnu.version_d) } >main AT>glob :rodata
.gnu.version_r : { *(.gnu.version_r) } >main AT>glob :rodata
/* =========== DATA section =========== */
.eh_frame_hdr : ONLY_IF_RW { *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*) } >main AT>glob :data
.eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) *(.eh_frame.*) } >main AT>glob :data
.gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) } >main AT>glob :data
.gnu_extab : ONLY_IF_RW { *(.gnu_extab*) } >main AT>glob :data
.exception_ranges : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) } >main AT>glob :data
.preinit_array ALIGN(8) :
{ {
. = ALIGN(8);
PROVIDE (__preinit_array_start = .); PROVIDE (__preinit_array_start = .);
KEEP (*(.preinit_array)) KEEP (*(.preinit_array))
PROVIDE (__preinit_array_end = .); PROVIDE (__preinit_array_end = .);
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :data
.init_array : .init_array :
{ {
@ -152,75 +183,56 @@ SECTIONS
KEEP (*(SORT(.init_array.*))) KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array)) KEEP (*(.init_array))
PROVIDE (__init_array_end = .); PROVIDE (__init_array_end = .);
} >main AT>glob } >main AT>glob :data
.fini_array : .fini_array :
{ {
. = ALIGN(8);
PROVIDE (__fini_array_start = .); PROVIDE (__fini_array_start = .);
KEEP (*(.fini_array)) KEEP (*(.fini_array))
KEEP (*(SORT(.fini_array.*))) KEEP (*(SORT(.fini_array.*)))
PROVIDE (__fini_array_end = .); PROVIDE (__fini_array_end = .);
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :data
.ctors : .ctors :
{ {
. = ALIGN(8);
KEEP (*crtbegin.o(.ctors)) /* MUST be first -- GCC requires it */ KEEP (*crtbegin.o(.ctors)) /* MUST be first -- GCC requires it */
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*))) KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors)) KEEP (*(.ctors))
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :data
.dtors ALIGN(8) : .dtors :
{ {
. = ALIGN(8);
KEEP (*crtbegin.o(.dtors)) KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*))) KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors)) KEEP (*(.dtors))
. = ALIGN(8); . = ALIGN(8);
} >main AT>glob } >main AT>glob :data
.data ALIGN(8) : .got : { __got_start__ = ABSOLUTE(.); *(.got) *(.igot) } >main AT>glob :data
.got.plt : { *(.got.plt) *(.igot.plt) __got_end__ = ABSOLUTE(.);} >main AT>glob :data
.data :
{ {
*(.data .data.* .gnu.linkonce.d.*) *(.data .data.* .gnu.linkonce.d.*)
CONSTRUCTORS SORT(CONSTRUCTORS)
. = ALIGN(8); . = ALIGN(32);
} >main AT>glob } >main AT>glob :data
.bss (NOLOAD) :
.eh_frame_hdr : { *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*) } >main AT>glob
.eh_frame : { KEEP (*(.eh_frame)) *(.eh_frame.*) } >main AT>glob
.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) } >main AT>glob
.gnu_extab : { *(.gnu_extab*) } >main AT>glob
.exception_ranges : { *(.exception_ranges .exception_ranges*) } >main AT>glob
.dynamic : { *(.dynamic) } >main AT>glob
.interp : { *(.interp) } >main AT>glob
.note.gnu.build-id : { *(.note.gnu.build-id) } >main AT>glob
.hash : { *(.hash) } >main AT>glob
.gnu.hash : { *(.gnu.hash) } >main AT>glob
.gnu.version : { *(.gnu.version) } >main AT>glob
.gnu.version_d : { *(.gnu.version_d) } >main AT>glob
.gnu.version_r : { *(.gnu.version_r) } >main AT>glob
.dynsym : { *(.dynsym) } >main AT>glob
.dynstr : { *(.dynstr) } >main AT>glob
.rela.dyn : { *(.rela.*); __main_end__ = ABSOLUTE(.);} >main AT>glob
.bss :
{ {
. = ALIGN(8); . = ALIGN(32);
__main_bss_start__ = ABSOLUTE(.); __main_bss_start__ = ABSOLUTE(.);
__loaded_end_lma__ = LOADADDR(.bss); __loaded_end_lma__ = LOADADDR(.bss);
*(.dynbss) *(.dynbss)
*(.bss .bss.* .gnu.linkonce.b.*) *(.bss .bss.* .gnu.linkonce.b.*)
*(COMMON) *(COMMON)
. = ALIGN(8); . = ALIGN(32);
__main_end__ = ABSOLUTE(.); __main_end__ = ABSOLUTE(.);
} >main AT>glob } >main :NONE
__end__ = ABSOLUTE(.) ; __end__ = ABSOLUTE(.) ;