freebsd-dev/sys/i386/linux/linux_vdso.lds.s
Dmitry Chagin bdc379344a Implement vdso - virtual dynamic shared object. Through vdso Linux
exposes functions from kernel with proper DWARF CFI information so that
it becomes easier to unwind through them.
Using vdso is a mandatory for a thread cancelation && cleanup
on a modern glibc.

Differential Revision:	https://reviews.freebsd.org/D1060
2015-05-24 15:28:17 +00:00

66 lines
1.3 KiB
ArmAsm

/*
* Linker script for 32-bit vDSO.
* Copied from Linux kernel arch/x86/vdso/vdso-layout.lds.S
* and arch/x86/vdso/vdso32/vdso32.lds.S
*
* $FreeBSD$
*/
SECTIONS
{
. = . + 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(0x100);
.text : { *(.text*) } :text =0x90909090
}
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;
}
ENTRY(linux_vsyscall);
VERSION
{
LINUX_2.5 {
global:
linux_vsyscall;
linux_sigcode;
linux_rt_sigcode;
local: *;
};
}