c56480a832
The implemenation differs from others Linuxulators. For unwinders Linux ucontext_t is stored, however native machine context is used to store/restore process state to avoid code duplication. As DWARF Aarch64 does not define a register number for PC and provides no direct way to encode the PC of the previous frame, CFI cannot describe a signal trampoline frame. So, modified the vdso linker script to discard unused sections. Extensions are not implemented. MFC after: 2 weeks
77 lines
1.2 KiB
ArmAsm
77 lines
1.2 KiB
ArmAsm
/*
|
|
* Linker script for 64-bit vDSO.
|
|
* Copied from Linux kernel arch/arm64/kernel/vdso/vdso.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) }
|
|
|
|
/DISCARD/ : {
|
|
*(.note.GNU-stack .note.gnu.property)
|
|
}
|
|
|
|
.note : { *(.note.*) } :text :note
|
|
|
|
. = ALIGN(0x100);
|
|
|
|
.text : { *(.text*) } :text =0x90909090
|
|
PROVIDE (__etext = .);
|
|
PROVIDE (_etext = .);
|
|
PROVIDE (etext = .);
|
|
|
|
.dynamic : { *(.dynamic) } :text :dynamic
|
|
|
|
.rodata : { *(.rodata*) } :text
|
|
.data : {
|
|
*(.data*)
|
|
}
|
|
|
|
_end = .;
|
|
PROVIDE(end = .);
|
|
|
|
/DISCARD/ : {
|
|
*(.eh_frame .eh_frame_hdr)
|
|
}
|
|
}
|
|
|
|
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 */
|
|
}
|
|
|
|
/*
|
|
* This controls what symbols we export from the DSO.
|
|
*/
|
|
VERSION
|
|
{
|
|
LINUX_2.6.39 {
|
|
global:
|
|
__kernel_rt_sigreturn;
|
|
__kernel_gettimeofday;
|
|
__kernel_clock_gettime;
|
|
__kernel_clock_getres;
|
|
local: *;
|
|
};
|
|
|
|
LINUX_0.0 {
|
|
global:
|
|
linux_platform;
|
|
kern_timekeep_base;
|
|
linux_vdso_sigcode;
|
|
local: *;
|
|
};
|
|
}
|