mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
f6b46ebf90
This revamps the vDSO linker script to lay things out with the best packing of the data and good, separate alignment of the code. The rigid layout using VDSO_TEXT_OFFSET no longer matters to the kernel. I've moved the layout parts of the linker script into a new include file, vdso-layout.lds.S; this is in preparation for sharing the script for the 32-bit vDSO builds too. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
65 lines
1.5 KiB
ArmAsm
65 lines
1.5 KiB
ArmAsm
/*
|
|
* Linker script for vDSO. This is an ELF shared object prelinked to
|
|
* its virtual address, and with only one read-only segment.
|
|
* This script controls its layout.
|
|
*/
|
|
|
|
SECTIONS
|
|
{
|
|
. = VDSO_PRELINK + SIZEOF_HEADERS;
|
|
|
|
.hash : { *(.hash) } :text
|
|
.gnu.hash : { *(.gnu.hash) }
|
|
.dynsym : { *(.dynsym) }
|
|
.dynstr : { *(.dynstr) }
|
|
.gnu.version : { *(.gnu.version) }
|
|
.gnu.version_d : { *(.gnu.version_d) }
|
|
.gnu.version_r : { *(.gnu.version_r) }
|
|
|
|
.note : { *(.note.*) } :text :note
|
|
|
|
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
|
|
.eh_frame : { KEEP (*(.eh_frame)) } :text
|
|
|
|
.dynamic : { *(.dynamic) } :text :dynamic
|
|
|
|
.rodata : { *(.rodata*) } :text
|
|
.data : {
|
|
*(.data*)
|
|
*(.sdata*)
|
|
*(.got.plt) *(.got)
|
|
*(.gnu.linkonce.d.*)
|
|
*(.bss*)
|
|
*(.dynbss*)
|
|
*(.gnu.linkonce.b.*)
|
|
}
|
|
|
|
.altinstructions : { *(.altinstructions) }
|
|
.altinstr_replacement : { *(.altinstr_replacement) }
|
|
|
|
/*
|
|
* Align the actual code well away from the non-instruction data.
|
|
* This is the best thing for the I-cache.
|
|
*/
|
|
. = ALIGN(0x100);
|
|
|
|
.text : { *(.text*) } :text =0x90909090
|
|
}
|
|
|
|
/*
|
|
* Very old versions of ld do not recognize this name token; use the constant.
|
|
*/
|
|
#define PT_GNU_EH_FRAME 0x6474e550
|
|
|
|
/*
|
|
* We must supply the ELF program headers explicitly to get just one
|
|
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
|
|
*/
|
|
PHDRS
|
|
{
|
|
text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
|
|
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
|
|
note PT_NOTE FLAGS(4); /* PF_R */
|
|
eh_frame_hdr PT_GNU_EH_FRAME;
|
|
}
|