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| author | Bodo Stroesser <bstroesser@fujitsu-siemens.com> | 2005-05-05 16:15:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-05 16:36:36 -0700 |
| commit | c578455a3eccf4dd7bd111e77129c301d6d67914 (patch) | |
| tree | b52def020bd10e1b8bffcf90e1e2a3c1b35010c8 /include/asm-um/processor-generic.h | |
| parent | ea66e8a3b6c4760e8fbf59b1becb6bd8e3dd5376 (diff) | |
| download | op-kernel-dev-c578455a3eccf4dd7bd111e77129c301d6d67914.zip op-kernel-dev-c578455a3eccf4dd7bd111e77129c301d6d67914.tar.gz | |
[PATCH] uml: S390 preparation, abstract host page fault data
This patch removes the arch-specific fault/trap-infos from thread and
skas-regs.
It adds a new struct faultinfo, that is arch-specific defined in
sysdep/faultinfo.h.
The structure is inserted in thread.arch and thread.regs.skas and
thread.regs.tt
Now, segv and other trap-handlers can copy the contents from regs.X.faultinfo
to thread.arch.faultinfo with one simple assignment.
Also, the number of macros necessary is reduced to
FAULT_ADDRESS(struct faultinfo)
extracts the faulting address from faultinfo
FAULT_WRITE(struct faultinfo)
extracts the "is_write" flag
SEGV_IS_FIXABLE(struct faultinfo)
is true for the fixable segvs, i.e. (TRAP == 14)
on i386
UPT_FAULTINFO(regs)
result is (struct faultinfo *) to the faultinfo
in regs->skas.faultinfo
GET_FAULTINFO_FROM_SC(struct faultinfo, struct sigcontext *)
copies the relevant parts of the sigcontext to
struct faultinfo.
On SIGSEGV, call user_signal() instead of handle_segv(), if the architecture
provides the information needed in PTRACE_FAULTINFO, or if PTRACE_FAULTINFO is
missing, because segv-stub will provide the info.
The benefit of the change is, that in case of a non-fixable SIGSEGV, we can
give user processes a SIGSEGV, instead of possibly looping on pagefault
handling.
Since handle_segv() sikked arch_fixup() implicitly by passing ip==0 to segv(),
I changed segv() to call arch_fixup() only, if !is_user.
Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-um/processor-generic.h')
| -rw-r--r-- | include/asm-um/processor-generic.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/include/asm-um/processor-generic.h b/include/asm-um/processor-generic.h index b953b1a..b2fc94f 100644 --- a/include/asm-um/processor-generic.h +++ b/include/asm-um/processor-generic.h @@ -24,9 +24,6 @@ struct thread_struct { int forking; int nsyscalls; struct pt_regs regs; - unsigned long cr2; - int err; - unsigned long trap_no; int singlestep_syscall; void *fault_addr; void *fault_catcher; @@ -74,8 +71,6 @@ struct thread_struct { .forking = 0, \ .nsyscalls = 0, \ .regs = EMPTY_REGS, \ - .cr2 = 0, \ - .err = 0, \ .fault_addr = NULL, \ .prev_sched = NULL, \ .temp_stack = 0, \ |
