musl - The musl libc tree (WIP / dev branches)

Age	Commit message (Collapse)	Author	Files	Lines
2011-06-26	in dlopen: don't use null pointer	Rich Felker	1	-3/+3
	deps can be null if a library has no dependencies (such as libc itself)
2011-06-26	fix resolving symbols in objects loaded in RTLD_LOCAL mode	Rich Felker	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.
2011-06-26	experimental dlopen/dlsym and dynlink changes needed to support them	Rich Felker	1	-8/+125

2011-06-26	error handling in dynamic linking	Rich Felker	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.
2011-06-25	fix some symbol resolution issues in dynamic linker	Rich Felker	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
2011-06-25	handle library paths better (ignore empty path components, etc.)	Rich Felker	1	-3/+5

2011-06-25	fix possible (questionable) strict aliasing violations and ptr arith	Rich Felker	1	-3/+3

2011-06-25	proper path searching for dynamic linker	Rich Felker	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.
2011-06-25	discard dso descriptors after performing relocations	Rich Felker	1	-0/+12
	eventually (once dlopen exists) this behavior will be conditional on dlopen/dlsym not being reachable.
2011-06-25	keep track of which dsos have been relocated	Rich Felker	1	-0/+1

2011-06-23	prepare support for LD_LIBRARY_PATH (checking suid/sgid safety)	Rich Felker	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.
2011-06-19	make ldso asm more uniform with rest of codebase (no unnecessary suffixes)	Rich Felker	1	-12/+12

2011-06-19	x86_64: ensure that dtor pointer passed to app is 0 so it won't be used	Rich Felker	1	-0/+1
	leaving it uninitialized caused unpredictable crashes or worse due to calling an indeterminate function pointer.
2011-06-18	dynamic linker 64bit fix: hash table entries are always 32bit	Rich Felker	1	-2/+2

2011-06-18	experimental dynamic linker!	Rich Felker	3	-0/+412
	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
2011-02-24	various changes in preparation for dynamic linking support	Rich Felker	1	-0/+8
	prefer using visibility=hidden for __libc internal data, rather than an accessor function, if the compiler has visibility. optimize with -O3 for PIC targets (shared library). without heavy inlining, reloading the GOT register in small functions kills performance. 20-30% size increase for a single libc.so is not a big deal, compared to comparaible size increase in every static binaries. use -Bsymbolic-functions, not -Bsymbolic. global variables are subject to COPY relocations, and thus binding their addresses in the library at link time will cause library functions to read the wrong (original) copies instead of the copies made in the main program's bss section. add entry point, _start, for dynamic linker.