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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/kernel/tt/trap_user.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/um/kernel/tt/trap_user.c')
-rw-r--r-- | arch/um/kernel/tt/trap_user.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/um/kernel/tt/trap_user.c b/arch/um/kernel/tt/trap_user.c new file mode 100644 index 0000000..92a3820 --- /dev/null +++ b/arch/um/kernel/tt/trap_user.c @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <stdlib.h> +#include <errno.h> +#include <signal.h> +#include "sysdep/ptrace.h" +#include "signal_user.h" +#include "user_util.h" +#include "kern_util.h" +#include "task.h" +#include "tt.h" + +void sig_handler_common_tt(int sig, void *sc_ptr) +{ + struct sigcontext *sc = sc_ptr; + struct tt_regs save_regs, *r; + struct signal_info *info; + int save_errno = errno, is_user; + + /* This is done because to allow SIGSEGV to be delivered inside a SEGV + * handler. This can happen in copy_user, and if SEGV is disabled, + * the process will die. + */ + if(sig == SIGSEGV) + change_sig(SIGSEGV, 1); + + r = &TASK_REGS(get_current())->tt; + save_regs = *r; + is_user = user_context(SC_SP(sc)); + r->sc = sc; + if(sig != SIGUSR2) + r->syscall = -1; + + info = &sig_info[sig]; + if(!info->is_irq) unblock_signals(); + + (*info->handler)(sig, (union uml_pt_regs *) r); + + if(is_user){ + interrupt_end(); + block_signals(); + set_user_mode(NULL); + } + *r = save_regs; + errno = save_errno; +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |