linux-stable-rt/arch/powerpc/kernel/vdso64
Benjamin Herrenschmidt 081c11a5d0 [POWERPC] Fix 64 bits vDSO DWARF info for CR register
The current DWARF info for CR are incorrect, causing the gcc unwinder to
go to lunch if we take a segfault in the vdso.  This fixes it.

Problem identified by Andrew Haley, and fix provided by Jakub Jelinek
(thanks !).

Unfortunately, a bug in gcc cause it to not quite work either, but that
is being fixed separately with something around the lines of:

linux-unwind.h:

     fs->regs.reg[R_CR2].loc.offset = (long) &regs->ccr - new_cfa;
+    /* CR? regs are just 32-bit and PPC is big-endian.  */
+    fs->regs.reg[R_CR2].loc.offset += sizeof (long) - 4;

(According to Jakub)

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-17 22:30:09 +10:00
..
.gitignore
Makefile
cacheflush.S
datapage.S
gettimeofday.S
note.S
sigtramp.S [POWERPC] Fix 64 bits vDSO DWARF info for CR register 2007-10-17 22:30:09 +10:00
vdso64.lds.S powerpc64 vDSO: linker script indentation 2007-10-16 10:01:50 -07:00
vdso64_wrapper.S