The IA32 ptrace emulation currently returns the wrong registers for fs/gs;
it's returning what x86_64 calls gs_base. We need regs.gsindex in order
for GDB to correctly locate the TLS area. Without this patch, the 32-bit
GDB testsuite bombs on a 64-bit kernel. With it, results look about like
I'd expect, although there are still a handful of kernel-related failures
(vsyscall related?).
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
switch (regno) {
case offsetof(struct user32, regs.fs):
if (val && (val & 3) != 3) return -EIO;
switch (regno) {
case offsetof(struct user32, regs.fs):
if (val && (val & 3) != 3) return -EIO;
- child->thread.fs = val & 0xffff;
+ child->thread.fsindex = val & 0xffff;
break;
case offsetof(struct user32, regs.gs):
if (val && (val & 3) != 3) return -EIO;
break;
case offsetof(struct user32, regs.gs):
if (val && (val & 3) != 3) return -EIO;
- child->thread.gs = val & 0xffff;
+ child->thread.gsindex = val & 0xffff;
break;
case offsetof(struct user32, regs.ds):
if (val && (val & 3) != 3) return -EIO;
break;
case offsetof(struct user32, regs.ds):
if (val && (val & 3) != 3) return -EIO;
switch (regno) {
case offsetof(struct user32, regs.fs):
switch (regno) {
case offsetof(struct user32, regs.fs):
- *val = child->thread.fs;
+ *val = child->thread.fsindex;
break;
case offsetof(struct user32, regs.gs):
break;
case offsetof(struct user32, regs.gs):
- *val = child->thread.gs;
+ *val = child->thread.gsindex;
break;
case offsetof(struct user32, regs.ds):
*val = child->thread.ds;
break;
case offsetof(struct user32, regs.ds):
*val = child->thread.ds;