forked from luck/tmp_suning_uos_patched
c578455a3e
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>
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| .. | ||
| skas | ||
| tt | ||
| checksum.c | ||
| config.c.in | ||
| dyn.lds.S | ||
| exec_kern.c | ||
| exitcode.c | ||
| gmon_syms.c | ||
| gprof_syms.c | ||
| helper.c | ||
| init_task.c | ||
| initrd_kern.c | ||
| initrd_user.c | ||
| irq_user.c | ||
| irq.c | ||
| ksyms.c | ||
| main.c | ||
| Makefile | ||
| mem_user.c | ||
| mem.c | ||
| physmem.c | ||
| process_kern.c | ||
| process.c | ||
| ptrace.c | ||
| reboot.c | ||
| resource.c | ||
| sigio_kern.c | ||
| sigio_user.c | ||
| signal_kern.c | ||
| signal_user.c | ||
| smp.c | ||
| syscall_kern.c | ||
| syscall_user.c | ||
| sysrq.c | ||
| tempfile.c | ||
| time_kern.c | ||
| time.c | ||
| tlb.c | ||
| trap_kern.c | ||
| trap_user.c | ||
| tty_log.c | ||
| uaccess_user.c | ||
| um_arch.c | ||
| umid.c | ||
| uml.lds.S | ||
| user_util.c | ||
| vmlinux.lds.S | ||