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path: root/crt/arm/crti.s
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2015-11-10explicitly assemble all arm asm sources as UALRich Felker-0/+2
these files are all accepted as legacy arm syntax when producing arm code, but legacy syntax cannot be used for producing thumb2 with access to the full ISA. even after switching to UAL, some asm source files contain instructions which are not valid in thumb mode, so these will need to be addressed separately.
2013-08-15add function types to arm crt assemblyRich Felker-0/+2
without these, calls may be resolved incorrectly if the calling code has been compiled to thumb instead of arm. it's not clear to me at this point whether crt_arch.h is even working if crt1.c is built as thumb; this needs testing. but the _init and _fini issues were known to cause crashes in static-linked apps when libc was built as thumb, and this commit should fix that issue.
2013-07-21remove init/fini array asm from arm crti/crtn filesRich Felker-22/+2
this code has been replaced by portable C code that works on all archs. the old asm needs to be removed or ctors/dtors will run twice.
2013-02-03fix regression that made shared libs crash on armRich Felker-0/+2
2012-12-07add support for ctors/dtors on arm with modern gccRich Felker-2/+20
a while back, gcc switched from using the old _init/_fini fragments method for calling ctors and dtors on arm to the __init_array and __fini_array method. unfortunately, on glibc this depends on ugly hacks involving making libc.so a linker script and pulling parts of libc into the main program binary. so I cheat a little bit, and just write asm to iterate over the init/fini arrays from the _init/_fini asm. the same approach could be used on any arch it's needed on, but for now arm is the only one.
2012-06-25fix arm crti/crtn codeRich Felker-0/+2
lr must be saved because init/fini-section code from the compiler clobbers it. this was not a problem when i tested without gcc's crtbegin/crtend files present, but with them, musl on arm fails to work (infinite loop in _init).
2012-02-06add support for init/finit (constructors and destructors)Rich Felker-0/+7
this is mainly in hopes of supporting c++ (not yet possible for other reasons) but will also help applications/libraries which use (and more often, abuse) the gcc __attribute__((__constructor__)) feature in "C" code. x86_64 and arm versions of the new startup asm are untested and may have minor problems.