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388165f5 |
| 29-Jan-2023 |
gnezdo <gnezdo@openbsd.org> |
Unite all nitems copies in ld.so/util.h
OK deraadt
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92d6eede |
| 10-May-2022 |
kettenis <kettenis@openbsd.org> |
Prevent out-of-bounds array access with binaries that use unsupported relocations.
ok guenther@
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b722ba42 |
| 08-Jan-2022 |
guenther <guenther@openbsd.org> |
Prep .c files for removing the #includes from */archdep.h * replace #include "archdep.h" with #includes of what is used, pulling in "syscall.h", "util.h", and "archdep.h" as needed * delete #inc
Prep .c files for removing the #includes from */archdep.h * replace #include "archdep.h" with #includes of what is used, pulling in "syscall.h", "util.h", and "archdep.h" as needed * delete #include <sys/syscall.h> from syscall.h * only pull in <sys/stat.h> to the three files that use _dl_fstat(), forward declare struct stat in syscall.h for the others * NBBY is for <sys/select.h> macros; just use '8' in dl_printf.c * <machine/vmparam.h> is only needed on i386; conditionalize it * stop using __LDPGSZ: use _MAX_PAGE_SHIFT (already used by malloc.c) where necessary * delete other bogus #includes, order legit per style: <sys/*> then <*/*>, then <*>, then "*"
dir.c improvement from jsg@ ok and testing assistance deraadt@
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d9337de3 |
| 07-Dec-2019 |
guenther <guenther@openbsd.org> |
Disable ltrace for objects linked with -znow, as at least on amd64, linking that was deletes the lazy relocation trampoline which ltrace currently depends on
problem reported by tb@ directional feed
Disable ltrace for objects linked with -znow, as at least on amd64, linking that was deletes the lazy relocation trampoline which ltrace currently depends on
problem reported by tb@ directional feedback kettenis@ ok mpi@
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c8754c30 |
| 28-Nov-2019 |
guenther <guenther@openbsd.org> |
Revert yesterday's _dl_md_reloc() and _dl_md_reloc_got() changes: something's broken on at least i386.
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0e51d825 |
| 26-Nov-2019 |
guenther <guenther@openbsd.org> |
Clean up _dl_md_reloc(): instead of having tables and piles of conditionals that handle a dozen relocation types for each, just have a nice little switch for the four specific relocations that actual
Clean up _dl_md_reloc(): instead of having tables and piles of conditionals that handle a dozen relocation types for each, just have a nice little switch for the four specific relocations that actually occur.
Besides being smaller and easier to understand, this fixes the COPY relocation handling to only do one symbol lookup, instead of looking up the symbol and then immediately looking it up again (with the correct flags to find the instance it needs).
ok kettenis@
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51a0cd2b |
| 26-Nov-2019 |
guenther <guenther@openbsd.org> |
Make aarch64, amd64, arm, and i386 more like sparc64: move non-lazy relocation from _dl_md_reloc() to _dl_md_reloc_all_plt() which has the minimal code to do it.
Also, avoid division on PLTRELSZ; ju
Make aarch64, amd64, arm, and i386 more like sparc64: move non-lazy relocation from _dl_md_reloc() to _dl_md_reloc_all_plt() which has the minimal code to do it.
Also, avoid division on PLTRELSZ; just use it to offset to the end.
ok kettenis@
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2f142762 |
| 24-Oct-2019 |
guenther <guenther@openbsd.org> |
Delete unused support for relocations that don't require alignment.
ok mpi@ kettenis@
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e3b0f1d9 |
| 23-Oct-2019 |
guenther <guenther@openbsd.org> |
Prefer the size-independent ELF identifiers over the size-specific ones. Strip superfluous parens from return statements while here.
Done programatically with two perl invocations
idea ok kettenis@
Prefer the size-independent ELF identifiers over the size-specific ones. Strip superfluous parens from return statements while here.
Done programatically with two perl invocations
idea ok kettenis@ drahn@ ok visa@
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d6b8755e |
| 05-Oct-2019 |
guenther <guenther@openbsd.org> |
Delete some obsolete debugging #ifdefs blocks
ok mlarkin@, mpi@, krw@, deraadt@
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90273bfb |
| 06-Aug-2019 |
guenther <guenther@openbsd.org> |
Factor out TEXTREL mprotecting from the per-arch files into _dl_rtld(), hiding the actual grotty bits in inline functions
ok mpi@
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143e5acc |
| 04-Aug-2019 |
guenther <guenther@openbsd.org> |
Simplify _dl_find_symbol(). Currently, it returns three values: - the symbol it found, returned via the second argument - the base offset of the the object it was found in, via the return value -
Simplify _dl_find_symbol(). Currently, it returns three values: - the symbol it found, returned via the second argument - the base offset of the the object it was found in, via the return value - optionally: the object it was found in, returned via the last argument
Instead, return a struct with the symbol and object pointers and let the caller get the base offset from the object's obj_base member. On at least aarch64, amd64, mips64, powerpc, and sparc64, a two word struct like this is passed in registers.
ok mpi@, kettenis@
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25205068 |
| 16-Nov-2018 |
guenther <guenther@openbsd.org> |
Finish ld.so's transition to GNU_RELRO: eliminate support for using __got_{start,end} to find a region to mark read-only. It was only used for binaries that didn't have a GNU_RELRO segment, but all
Finish ld.so's transition to GNU_RELRO: eliminate support for using __got_{start,end} to find a region to mark read-only. It was only used for binaries that didn't have a GNU_RELRO segment, but all archs have been using that for over a year. Since support for insecure-PLT layouts on powerpc and alpha have been removed, all archs handle GNU_RELRO the same way and the support can be moved from the MD code to the MI code.
ok mpi@
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2668a398 |
| 25-Oct-2018 |
guenther <guenther@openbsd.org> |
The compilers already put static arrays in .rodata when not written to; marking them const will keep a source change from silently moving them back to .data
ok deraadt@ kettenis@
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f60b60f5 |
| 04-Jun-2017 |
naddy <naddy@openbsd.org> |
For the memory operand, clang passes in an address relative to the stack pointer. We cannot use this twice while pushing values on the stack. Instead load the operand address into a register and us
For the memory operand, clang passes in an address relative to the stack pointer. We cannot use this twice while pushing values on the stack. Instead load the operand address into a register and use this as base address. Use %edx since it is already marked as clobbered. Also fixes a syntax problem for clang. ok mlarkin@
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3b50b772 |
| 24-Jan-2017 |
guenther <guenther@openbsd.org> |
On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of simply exiting, via helper functions _dl_die(), _dl_diedie(), and _dl_oom().
prompted by a complaint from jsing@ ok jsing@ deraadt@
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82f40691 |
| 04-Jul-2016 |
guenther <guenther@openbsd.org> |
The GOT has been initally mapped RW for *years*; ld.so doesn't need to mprotect it to RW when filling in the references from the PLT
in snaps for a week, ok deraadt@
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0a2c9542 |
| 26-May-2016 |
deraadt <deraadt@openbsd.org> |
for textrels (sthen ran into one...): Ignore the listed protection (which may contain X) when making page writeable temporary.
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6d5bcfa2 |
| 22-May-2016 |
deraadt <deraadt@openbsd.org> |
Ignore the listed protection (which may contain X) when making page writeable temporary. As pointed out by kettenis, discussed with guenther
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e23a26ff |
| 02-Nov-2015 |
guenther <guenther@openbsd.org> |
Factor out the logic for mprotecting the memory between two symbols into a new MI routine _dl_protect_segment(), and use that for protecting the GOT and--on some archs--the PLT.
Amazing testing turn
Factor out the logic for mprotecting the memory between two symbols into a new MI routine _dl_protect_segment(), and use that for protecting the GOT and--on some archs--the PLT.
Amazing testing turnaround by miod@, who apparently violated relativity to get back results on some archs as fast as he did
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325c51e2 |
| 25-Aug-2015 |
guenther <guenther@openbsd.org> |
Use kbind for lazy binding GOT/PLT updates on i386 and powerpc; still others to follow. While here add some gcc __predict hints.
Much discussion with and assistance from miod and deraadt ok deraadt@
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117639ec |
| 26-Jul-2015 |
guenther <guenther@openbsd.org> |
Copy relocations can't be jump-slot relocations, so delete the test for that.
ok miod@
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875211e1 |
| 13-Jun-2013 |
brad <brad@openbsd.org> |
Appease LLVM warning..
error: indirection of non-volatile null pointer will be deleted, not trap [-Werror,-Wnull-dereference]
Suggestion from matthew@ Ok matthew@ miod@
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ae398163 |
| 01-Jun-2013 |
miod <miod@openbsd.org> |
Introduce ltrace(1). This tool works with ld.so to inject utrace record for each plt call, allowing to trace a binary linked against shared library at the public function call level.
To do so, ltrac
Introduce ltrace(1). This tool works with ld.so to inject utrace record for each plt call, allowing to trace a binary linked against shared library at the public function call level.
To do so, ltrace(1) sets up some environment variables to enable plt tracing in ld.so, and invokes ktrace(2) for utrace events. ld.so will force lazy binding and will send an utrace record in the plt resolver, without updating the plt.
Minimal filtering capabilities are provided, inspired by Solaris' truss -u, to limit tracing to libraries and/or symbol names. Non-traced libraries and symbols will have the regular resolver processing, with the expected plt update.
"Get it in" deraadt
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88098a4d |
| 08-May-2013 |
guenther <guenther@openbsd.org> |
Implement symbol caching and RELACOUNT/RELCOUNT optimizations. Much assistance and testing by miod
ok miod@
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