| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | fix broken copy relocations from dynamic linker cleanup | Rich Felker | 2012-01-23 | 1 | -1/+4 |
| | | | | | | this issue affected programs which use global variables exported by non-libc libraries. | ||||
| * | dynamic linker support for PIE binaries (position-independent main program) | Rich Felker | 2012-01-23 | 1 | -3/+6 |
| | | | | | | even with this change, PIE will not work yet due to deficiencies in the crt1.o startup code. | ||||
| * | cleanup dynamic linker, removing some code duplication | Rich Felker | 2012-01-23 | 1 | -80/+66 |
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| * | fix dynamic linker not to depend on DYNAMIC ptr in 0th entry of GOT | Rich Felker | 2012-01-20 | 1 | -3/+12 |
| | | | | | | | | | | | this fixes an issue using gold instead of gnu ld for linking. it also should eliminate the need of the startup code to even load/pass the got address to the dynamic linker. based on patch submitted by sh4rm4 with minor cosmetic changes. further cleanup will follow. | ||||
| * | fix char signedness bug in dynlinker hash function | Rich Felker | 2012-01-17 | 1 | -1/+2 |
| | | | | | | this only affects non-ascii symbol names, which are probably not in use anyway.. | ||||
| * | disable dynamic linking/loading code in static libc builds, for now | Rich Felker | 2011-09-18 | 1 | -0/+2 |
| | | | | | | it does not work, but some configure scripts will falsely detect support then generate programs that crash when they call dlopen. | ||||
| * | ldso: move the suid/secure check code closer to env/auxv processing | Rich Felker | 2011-08-16 | 1 | -7/+7 |
| | | | | | | | this does not change behavior, but the idea is to avoid letting other code build up between these two points, whereby the environment variables might get used before security it checked. | ||||
| * | honor AT_SECURE aux vector flag | Rich Felker | 2011-08-16 | 1 | -2/+2 |
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| * | RTLD_NEXT support | Rich Felker | 2011-08-16 | 1 | -3/+8 |
| | | | | | | the asm wrapper is needed to get the return address without compiler-specific extensions. | ||||
| * | LD_PRELOAD support | Rich Felker | 2011-08-16 | 1 | -0/+20 |
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| * | when resolving symbols with only weak defs, use first def, not last def | Rich Felker | 2011-07-25 | 1 | -0/+1 |
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| * | fix resolution of weak symbols (hopefully right now) and vdso | Rich Felker | 2011-07-24 | 1 | -3/+9 |
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| * | load vdso, if present, into the dso list | Rich Felker | 2011-07-24 | 1 | -2/+31 |
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| * | simplify dynamic linker startup | Rich Felker | 2011-07-24 | 1 | -23/+17 |
| | | | | | | | instead of creating temp dso objects on the stack and moving them to the heap if dlopen/dlsym are used, use static objects to begin with, and just donate them to malloc if we no longer need them. | ||||
| * | fix dlopen UB due to longjmp/volatile rules violation | Rich Felker | 2011-07-01 | 1 | -1/+1 |
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| * | simple rpath support (no token expansion yet) for dynamic linker | Rich Felker | 2011-06-30 | 1 | -2/+8 |
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| * | textrel support, cheap and ugly | Rich Felker | 2011-06-29 | 1 | -0/+5 |
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| * | reclaim the memory wasted by dynamic linking for use by malloc | Rich Felker | 2011-06-28 | 1 | -0/+39 |
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| * | use load address from elf header if possible | Rich Felker | 2011-06-28 | 1 | -1/+1 |
| | | | | | | | | | | this is mostly useless for shared libs (though it could help for prelink-like purposes); the intended use case is for adding support for calling the dynamic linker directly to run a program, as in: ./libc.so ./a.out foo this usage is not yet supported. | ||||
| * | make dynamic linker relocate the main program image last, after all libs | Rich Felker | 2011-06-28 | 1 | -0/+1 |
| | | | | | | prior to this change, copy relocations for initialized pointer variables would not reflect the relocated contents of the pointer. | ||||
| * | fix stale pointer issue in dynamic linker with dlopen | Rich Felker | 2011-06-26 | 1 | -0/+1 |
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| * | don't leave the lock held on dlopen failure.. | Rich Felker | 2011-06-26 | 1 | -2/+2 |
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| * | add RTLD_DEFAULT support | Rich Felker | 2011-06-26 | 1 | -1/+2 |
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| * | in dlopen: don't use null pointer | Rich Felker | 2011-06-26 | 1 | -3/+3 |
| | | | | | deps can be null if a library has no dependencies (such as libc itself) | ||||
| * | fix resolving symbols in objects loaded in RTLD_LOCAL mode | Rich Felker | 2011-06-26 | 1 | -0/+11 |
| | | | | | | | basically we temporarily make the library and all its dependencies part of the global namespace but only for the duration of performing relocations, then return them to their former state. | ||||
| * | experimental dlopen/dlsym and dynlink changes needed to support them | Rich Felker | 2011-06-26 | 1 | -8/+125 |
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| * | error handling in dynamic linking | Rich Felker | 2011-06-26 | 1 | -2/+19 |
| | | | | | | | some of the code is not yet used, and is in preparation for dlopen which needs to be able to handle failure loading libraries without terminating the program. | ||||
| * | fix some symbol resolution issues in dynamic linker | Rich Felker | 2011-06-25 | 1 | -4/+4 |
| | | | | | | 1. search was wrongly beginning with lib itself rather than dso head 2. inconsistent resolution of function pointers for functions in plt | ||||
| * | handle library paths better (ignore empty path components, etc.) | Rich Felker | 2011-06-25 | 1 | -3/+5 |
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| * | fix possible (questionable) strict aliasing violations and ptr arith | Rich Felker | 2011-06-25 | 1 | -3/+3 |
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| * | proper path searching for dynamic linker | Rich Felker | 2011-06-25 | 1 | -14/+38 |
| | | | | | | first, use $LD_LIBRARY_PATH unless suid. if that fails, read path from /etc/ld-musl-$ARCH.path and fallback to a builtin default. | ||||
| * | discard dso descriptors after performing relocations | Rich Felker | 2011-06-25 | 1 | -0/+12 |
| | | | | | | eventually (once dlopen exists) this behavior will be conditional on dlopen/dlsym not being reachable. | ||||
| * | keep track of which dsos have been relocated | Rich Felker | 2011-06-25 | 1 | -0/+1 |
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| * | prepare support for LD_LIBRARY_PATH (checking suid/sgid safety) | Rich Felker | 2011-06-23 | 1 | -0/+6 |
| | | | | | | | | | | | the use of this test will be much stricter than glibc and other typical implementations; the environment will not be honored whatsoever unless the program is confirmed non-suid/sgid by the aux vector the kernel passed in. no fallback to slow syscall-based checking is used if the kernel fails to provide the information; we simply assume the worst (suid) in this case and refuse to honor environment. | ||||
| * | dynamic linker 64bit fix: hash table entries are always 32bit | Rich Felker | 2011-06-18 | 1 | -2/+2 |
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| * | experimental dynamic linker! | Rich Felker | 2011-06-18 | 1 | -0/+385 |
| some notes: - library search path is hard coded - x86_64 code is untested and may not work - dlopen/dlsym is not yet implemented - relocations in read-only memory won't work | |||||
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