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[PATCH] uml: Use klibc setjmp/longjmp

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This patch adds an implementation of setjmp and longjmp to UML, allowing
access to the inside of a jmpbuf without needing the access macros formerly
provided by libc.

The implementation is stolen from klibc.  I copy the relevant files into
arch/um.  I have another patch which avoids the copying, but requires klibc be
in the tree.

setjmp and longjmp users required some tweaking.  Includes of <setjmp.h> were
removed and includes of the UML longjmp.h were added where necessary.  There
are also replacements of siglongjmp with UML_LONGJMP which I somehow missed
earlier.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike
2006-09-25 23:32:59 -07:00
committed by Linus Torvalds
parent c5c6ba4e08
commit 13c06be399
14 changed files with 173 additions and 23 deletions
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3
arch/um/os-Linux/skas/process.c
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@@ -8,7 +8,6 @@
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <setjmp.h>
#include <sched.h>
#include "ptrace_user.h"
#include <sys/wait.h>
@@ -470,7 +469,7 @@ void thread_wait(void *sw, void *fb)
*switch_buf = &buf;
fork_buf = fb;
if(UML_SETJMP(&buf) == 0)
siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK);
UML_LONGJMP(fork_buf, INIT_JMP_REMOVE_SIGSTACK);
}
void switch_threads(void *me, void *next)