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* direct syscall to open in __init_security needs O_LARGEFILERich Felker2012-06-141-1/+1
| | | | | it probably does not matter for /dev/null, but this should be done consistently anyway.
* fix missing static (namespace clash)Rich Felker2012-05-101-1/+1
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* overhaul SSP support to use a real canaryRich Felker2012-05-033-8/+17
| | | | | | | | | | | | | pthread structure has been adjusted to match the glibc/GCC abi for where the canary is stored on i386 and x86_64. it will need variants for other archs to provide the added security of the canary's entropy, but even without that it still works as well as the old "minimal" ssp support. eventually such changes will be made anyway, since they are also needed for GCC/C11 thread-local storage support (not yet implemented). care is taken not to attempt initializing the thread pointer unless the program actually uses SSP (by reference to __stack_chk_fail).
* make stack protector work with gcc configured for non-tls canaryRich Felker2012-04-301-0/+2
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* first attempt at enabling stack protector supportRich Felker2012-04-242-0/+21
| | | | | | | | the code is written to pre-init the thread pointer in static linked programs that pull in __stack_chk_fail or dynamic-linked programs that lookup the symbol. no explicit canary is set; the canary will be whatever happens to be in the thread structure at the offset gcc hard-coded. this can be improved later.
* bring back ___environ symbol (3 underscores)Rich Felker2011-08-231-0/+1
| | | | | | its existence doesn't hurt anything, and dynamic-linked binaries using previous versions of musl were wrongly binding to it instead of __environ.
* security hardening: ensure suid programs have valid stdin/out/errRich Felker2011-08-233-13/+38
| | | | | | | | | | | this behavior (opening fds 0-2 for a suid program) is explicitly allowed (but not required) by POSIX to protect badly-written suid programs from clobbering files they later open. this commit does add some cost in startup code, but the availability of auxv and the security flag will be useful elsewhere in the future. in particular auxv is needed for static-linked vdso support, which is still waiting to be committed (sorry nik!)
* fix for setenv bogus var argument handlingRich Felker2011-07-281-1/+1
| | | | | | | | | | | thanks to mikachu per POSIX: The setenv() function shall fail if: [EINVAL] The name argument is a null pointer, points to an empty string, or points to a string containing an '=' character.
* add startup abi functions, dummy for now. eventually needed for c++ support.Rich Felker2011-04-062-0/+10
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* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-127-0/+178