331206 |
19-Mar-2018 |
marius |
MFC: r328834
o Let rtld(1) set up psABI user trap handlers prior to executing the objects' init functions instead of doing the setup via a constructor in libc as the init functions may already depend on these handlers to be in place. This gets us rid of: - the undefined order in which libc constructors as __guard_setup() and jemalloc_constructor() are executed WRT __sparc_utrap_setup(), - the requirement to link libc last so __sparc_utrap_setup() gets called prior to constructors in other libraries (see r122883). For static binaries, crt1.o still sets up the user trap handlers. o Move misplaced prototypes for MD functions in to the MD prototype section of rtld.h. o Sprinkle nitems(). |
309061 |
23-Nov-2016 |
kib |
MFC r308689: Pass CPUID[1] %edx (cpu_feature), %ecx (cpu_feature2) and CPUID[7].%ebx (cpu_stdext_feature), %ecx (cpu_stdext_feature2) to the ifunc resolvers on x86.
MFC r308925: Adjust r308689 to make rtld compilable with either in-tree or (hopefully) stock gcc 4.2.1 on i386 and other arches. |
282142 |
28-Apr-2015 |
emaste |
MFC r281107: MIPS rtld: report missing symbol rather than segfaulting
This is only an interim fix; MIPS should be using the MI code instead, which does not have this issue. |
271469 |
12-Sep-2014 |
kib |
MFC r270798: Process STT_GNU_IFUNC when doing non-plt relocations.
MFC r270802: Only do the second pass over non-plt relocations when the first pass found IFUNCs.
Approved by: re (gjb) |
256281 |
10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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233378 |
23-Mar-2012 |
gonzo |
Before jumping to application's entry point set ra == pc in order to let backtracing routine know to go no further.
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233231 |
20-Mar-2012 |
kib |
Fix several problems with our ELF filters implementation.
Do not relocate twice an object which happens to be needed by loaded binary (or dso) and some filtee opened due to symbol resolution when relocating need objects. Record the state of the relocation processing in Obj_Entry and short-circuit relocate_objects() if current object already processed.
Do not call constructors for filtees loaded during the early relocation processing before image is initialized enough to run user-provided code. Filtees are loaded using dlopen_object(), which normally performs relocation and initialization. If filtee is lazy-loaded during the relocation of dso needed by the main object, dlopen_object() runs too earlier, when most runtime services are not yet ready.
Postpone the constructors call to the time when main binary and depended libraries constructors are run, passing the new flag RTLD_LO_EARLY to dlopen_object(). Symbol lookups callers inform symlook_* functions about early stage of initialization with SYMLOOK_EARLY. Pass flags through all functions participating in object relocation.
Use the opportunity and fix flags argument to find_symdef() in arch-specific reloc.c to use proper name SYMLOOK_IN_PLT instead of true, which happen to have the same numeric value.
Reported and tested by: theraven Reviewed by: kan MFC after: 2 weeks
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232893 |
12-Mar-2012 |
gonzo |
Use PTR_SUBU instead of subu (missed this one)
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232892 |
12-Mar-2012 |
gonzo |
Use PTR_(ADD|SUB)U macrosses instead of hardcoded addu/subu
Spotted by: juli
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232884 |
12-Mar-2012 |
gonzo |
- Although we pass first 4 arguments in registers, function callinf ABI requires space to be reserved for them in stack. _rtld() prologue saves a1 and a2 in this space.
- Whitespace cleanup while I'm at it
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232831 |
11-Mar-2012 |
kib |
Add support for preinit, init and fini arrays. Some ABIs, in particular on ARM, do require working init arrays.
Traditional FreeBSD crt1 calls _init and _fini of the binary, instead of allowing runtime linker to arrange the calls. This was probably done to have the same crt code serve both statically and dynamically linked binaries. Since ABI mandates that first is called preinit array functions, then init, and then init array functions, the init have to be called from rtld now.
To provide binary compatibility to old FreeBSD crt1, which calls _init itself, rtld only calls intializers and finalizers for main binary if binary has a note indicating that new crt was used for linking. Add parsing of ELF notes to rtld, and cache p_osrel value since we parsed it anyway.
The patch is inspired by init_array support for DragonflyBSD, written by John Marino.
Reviewed by: kan Tested by: andrew (arm, previous version), flo (sparc64, previous version) MFC after: 3 weeks
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232578 |
06-Mar-2012 |
gonzo |
- Switch to saving non-offseted pointer to TLS block in order too keep things simple
|
231491 |
11-Feb-2012 |
gonzo |
Add handlers for TLS-related relocation entries
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231419 |
10-Feb-2012 |
gonzo |
Remove debug output
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231347 |
10-Feb-2012 |
gonzo |
Switch MIPS TLS implementation to Variant I
|
231329 |
10-Feb-2012 |
gonzo |
Fix debug output for MIPS part of rtld
|
229780 |
07-Jan-2012 |
uqs |
Spelling fixes for libexec/
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228435 |
12-Dec-2011 |
kib |
Add support for STT_GNU_IFUNC and R_MACHINE_IRELATIVE GNU extensions to rtld on 386 and amd64. This adds runtime bits neccessary for the use of the dispatch functions from the dynamically-linked executables and shared libraries.
To allow use of external references from the dispatch function, resolution of the R_MACHINE_IRESOLVE relocations in PLT is postponed until GOT entries for PLT are prepared, and normal resolution of the GOT entries is finished. Similar to how it is done by GNU, IRELATIVE relocations are resolved in advance, instead of normal lazy handling for PLT.
Move the init_pltgot() call before the relocations for the object are processed.
MFC after: 3 weeks
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217851 |
25-Jan-2011 |
kib |
When loading dso without PT_GNU_STACK phdr, only call __pthread_map_stacks_exec() on architectures that allow executable stacks.
Reported and tested by: marcel (ia64)
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216695 |
25-Dec-2010 |
kib |
Implement support for ELF filters in rtld. Both normal and auxillary filters are implemented.
Filtees are loaded on demand, unless LD_LOADFLTR environment variable is set or -z loadfltr was specified during the linking. This forces rtld to upgrade read-locked rtld_bind_lock to write lock when it encounters an object with filter during symbol lookup.
Consolidate common arguments of the symbol lookup functions in the SymLook structure. Track the state of the rtld locks in the RtldLockState structure. Pass local RtldLockState through the rtld symbol lookup calls to allow lock upgrades.
Reviewed by: kan Tested by: Mykola Dzham <i levsha me>, nwhitehorn (powerpc)
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211159 |
11-Aug-2010 |
neel |
Add parentheses around the argument 'x' used in the __bswapXX(x) macros. Revert r211130 in favor of this more general fix.
This fixes a compilation error for mips 64-bit little endian build. libexec/rtld-elf/mips/reloc.c:196: warning: right shift count >= width of type
Suggested by: stefanf, jchandra, bde
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211130 |
10-Aug-2010 |
neel |
Fix compilation error for 64-bit little endian build: libexec/rtld-elf/mips/reloc.c:196: warning: right shift count >= width of type
When the expression '(r_info) >> 32' was passed to bswap32() it was promptly changed to '(uint32_t)(r_info) >> 32' which is not what we intended.
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210629 |
29-Jul-2010 |
jchandra |
64 bit support for MIPS rtld.
- Handle the case where pltgot[1] is 64 bit. - use 'ifdef __mips_n64' instead of 'ELFSIZE == 64' to detect 64 bit compile.
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209239 |
16-Jun-2010 |
jchandra |
Merge jmallett@'s n64 work into HEAD - changeset 3
Update rtld MIPS code to use assembly macros that work on o32/n64.
Changes from http://svn.freebsd.org/base/user/jmallett/octeon
Approved by: rrs(mentor), jmallett
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204687 |
04-Mar-2010 |
imp |
Updated rtld for n32 support.
Submitted by: jmallet@ Obtained from: NetBSD
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191291 |
19-Apr-2009 |
rwatson |
Now that the kernel defines CACHE_LINE_SIZE in machine/param.h, use that definition in the custom locking code for the run-time linker rather than local definitions.
Pointed out by: tinderbox MFC after: 2 weeks
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183841 |
13-Oct-2008 |
imp |
This code has no copyright. It is fairly obvious to me that we're a derivitive of NetBSD's mips_reloc.c, so pull in the copyright notice from there.
Also, a minor tweak to load/store pointers. Other changes from NetBSD likely would be useful too...
Obtained from: NetBSD
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183739 |
10-Oct-2008 |
imp |
MFp4: Fix a bug in the mips relocation code that prevents shared images from working.
From p4 filelog of the upstream file in p4
//depot/projects/mips2-jnpr/src/libexec/rtld-elf/mips/reloc.c ... #6 change 140737 edit on 2008/04/27 by gonzo@gonzo_jeeves (text+ko)
o Looks like handler for R_MIPS_REL32 brought by CS 137942 is broken for tradmips. Code from NetBSD's libexec/ld.elf_so/arch/mips/mips_reloc.c works just fine.
... #3 change 137942 edit on 2008/03/17 by rrs@rrs-mips2-jnpr (text+ko)
Any relocation symbol lookup if its 0. It looks like this is the way the compiler indicates you need to look in another shared library. When we hit these as we relocate a object we will do the symbol lookups and setup the relocation table with the right value.
Submitted by: rrs@, gonzo@
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177924 |
04-Apr-2008 |
imp |
MFp4: Add mips support for dynamic linking.
This code came from the merged mips2 and Juniper mips repositories. Warner Losh, Randall Seager, Oleksandr Tymoshenko and Olivier Houchard worked to merge, debug and integrate this code. This code may also contain code derived from NetBSD.
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