musl/src/signal/siglongjmp.c

#include <setjmp.h>
#include <signal.h>
#include <stdlib.h>
#include "syscall.h"

void siglongjmp(sigjmp_buf buf, int ret)
{
	if (buf->__fl) __syscall(SYS_rt_sigprocmask, SIG_SETMASK,
		buf->__ss, 0, __SYSCALL_SSLEN);
	longjmp(buf->__jb, ret);
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include <setjmp.h>`
			`#include <signal.h>`
			`#include <stdlib.h>`
jmp_buf overhaul fixing several issues on arm, the location of the saved-signal-mask flag and mask were off by one between sigsetjmp and siglongjmp, causing incorrect behavior restoring the signal mask. this is because the siglongjmp code assumed an extra slot was in the non-sig jmp_buf for the flag, but arm did not have this. now, the extra slot is removed for all archs since it was useless. also, arm eabi requires jmp_buf to have 8-byte alignment. we achieve that using long long as the type rather than with non-portable gcc attribute tags. 2012-07-03 20:07:33 -04:00			`#include "syscall.h"`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00
			`void siglongjmp(sigjmp_buf buf, int ret)`
			`{`
fix (hopefully) all hard-coded 8's for kernel sigset_t size some minor changes to how hard-coded sets for thread-related purposes are handled were also needed, since the old object sizes were not necessarily sufficient. things have gotten a bit ugly in this area, and i think a cleanup is in order at some point, but for now the goal is just to get the code working on all supported archs including mips, which was badly broken by linux rejecting syscalls with the wrong sigset_t size. 2012-08-09 22:52:13 -04:00			`if (buf->__fl) __syscall(SYS_rt_sigprocmask, SIG_SETMASK,`
			`buf->__ss, 0, __SYSCALL_SSLEN);`
jmp_buf overhaul fixing several issues on arm, the location of the saved-signal-mask flag and mask were off by one between sigsetjmp and siglongjmp, causing incorrect behavior restoring the signal mask. this is because the siglongjmp code assumed an extra slot was in the non-sig jmp_buf for the flag, but arm did not have this. now, the extra slot is removed for all archs since it was useless. also, arm eabi requires jmp_buf to have 8-byte alignment. we achieve that using long long as the type rather than with non-portable gcc attribute tags. 2012-07-03 20:07:33 -04:00			`longjmp(buf->__jb, ret);`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`}`