Date: Sat, 8 Jan 2011 17:11:49 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/libexec/rtld-elf Symbol.map map_object.c rtld.c rtld.h src/sys/sys link_elf.h Message-ID: <201101081712.p08HCsS0048981@repoman.freebsd.org>
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kib 2011-01-08 17:11:49 UTC
FreeBSD src repository
Modified files:
libexec/rtld-elf Symbol.map map_object.c rtld.c rtld.h
sys/sys link_elf.h
Log:
SVN rev 217153 on 2011-01-08 17:11:49Z by kib
In rtld, read the initial stack access mode from AT_STACKPROT as set
by kernel, and parse PT_GNU_STACK phdr from linked and loaded dsos.
If the loaded dso requires executable stack, as specified by PF_X bit
of p_flags of PT_GNU_STACK phdr, but current stack protection does not
permit execution, the __pthread_map_stacks_exec symbol is looked up
and called. It should be implemented in libc or threading library and
change the protection mode of all thread stacks to be executable.
Provide a private interface _rtld_get_stack_prot() to export the stack
access mode as calculated by rtld.
Reviewed by: kan
Revision Changes Path
1.10 +1 -0 src/libexec/rtld-elf/Symbol.map
1.24 +7 -0 src/libexec/rtld-elf/map_object.c
1.164 +42 -0 src/libexec/rtld-elf/rtld.c
1.49 +1 -0 src/libexec/rtld-elf/rtld.h
1.32 +1 -0 src/sys/sys/link_elf.h
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