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ucontext implementation featuring glibc-compatible ABI
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Khem Raj 6cfab025e0 pass LDFLAGS to link step 
This helps to use OE specific linker flags and fixes

do_package_qa: QA Issue: No GNU_HASH in the ELF binary

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
 		2020-03-27 08:54:56 +00:00
arch ppc32/64: rewrite get/set/swapcontext in assembly 2019-04-05 14:44:54 -05:00
.gitignore Makefile: Handle static library at clean/install 2019-04-12 10:48:24 +03:00
LICENSE don't bother with glibc stuff afterall, kernel defines ABI to use 2018-01-29 21:50:49 +00:00
Makefile pass LDFLAGS to link step 2020-03-27 08:54:56 +00:00
README.md ppc32/64: rewrite get/set/swapcontext in assembly 2019-04-05 14:44:54 -05:00
test_libucontext.c test calls to getcontext without makecontext 2019-04-05 13:28:36 -05:00

README.md

libucontext

libucontext is a library which provides the ucontext.h C API. Unlike other implementations, it faithfully follows the kernel process ABI when doing context swaps.

Notably, when combined with gcompat, it provides a fully compatible implementation of the ucontext functions that are ABI compatible with glibc.

supported architectures

Adding support for new architectures is easy, but you need to know assembly language to do it.

Right now these archs are supported and should work on bare metal:

  • x86
  • x86_64
  • armv6+ (arm)
  • aarch64
  • s390x

These archs require kernel assistance and use a syscall:

  • ppc
  • ppc64 (ELFv2 ABI spec only, ELFv1 not supported)

building

libucontext uses a simple makefile build system. You should define ARCH= at build time, otherwise the build system will attempt to guess using uname -m.

$ make ARCH=x86_64
$ make ARCH=x86_64 check
$ make ARCH=x86_64 DESTDIR=out install

support

libucontext is offered as part of the gcompat project. Accordingly, please address all questions and bug reports to gcompat@lists.adelielinux.org.