CVSROOT: /cvs
Module name: src
Changes by: k...@cvs.openbsd.org 2014/12/21 20:51:08
Modified files:
lib/csu : Makefile crt0.c
lib/csu/amd64 : md_init.h
libexec/ld.so/amd64: archdep.h
Added files:
lib/csu : boot.h
Log message:
Introduce new csu0 variant for -static -pie binaries to use called
rcsu0.o where the initial 'r' is for relocatable. rcsu0.o performs
self-relocation on static pie binaries by calling a slightly modified
copy of ld.so's _dl_boot_bind() in boot.h.
The first arch implementatation is also included for amd64 where
__start calls _dl_boot_bind() and then calls ___start(). Includes
parts from kettenis@ to help get R_X86_64_64 relocations working
and proper handling for undefined weak symbols.
This is the first part of several to get static pie self-relocating
binaries working. binutils, gcc and kernel changes are forthcoming
to complete the solution, then per-arch implementations are needed
for MD_RCRT0_START in csu.
okay kettenis@ pascal@ deraadt@
