Staging
v0.8.1
v0.8.1
https://github.com/torvalds/linux
Revision c578455a3eccf4dd7bd111e77129c301d6d67914 authored by Bodo Stroesser on 05 May 2005, 23:15:31 UTC, committed by Linus Torvalds on 05 May 2005, 23:36:36 UTC
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>
1 parent ea66e8a
Tip revision: c578455a3eccf4dd7bd111e77129c301d6d67914 authored by Bodo Stroesser on 05 May 2005, 23:15:31 UTC
[PATCH] uml: S390 preparation, abstract host page fault data
[PATCH] uml: S390 preparation, abstract host page fault data
Tip revision: c578455
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
crypto | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
scripts | ||
security | ||
sound | ||
usr | ||
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 87.2 KB |
MAINTAINERS | -rw-r--r-- | 55.8 KB |
Makefile | -rw-r--r-- | 43.2 KB |
README | -rw-r--r-- | 13.6 KB |
REPORTING-BUGS | -rw-r--r-- | 2.9 KB |
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