diff options
| author | Daniel Jacobowitz <drow@false.org> | 2005-08-04 13:41:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-04 16:28:27 -0700 |
| commit | e8ed11b9dc07df0134248542ca8e7d40751a6052 (patch) | |
| tree | fe86ae2bcc5b1bb0ffee134005bd2449aea0eada /arch | |
| parent | c91096d85c95c6b7fe8d7065e2aa6825e0bdaca9 (diff) | |
| download | lwn-e8ed11b9dc07df0134248542ca8e7d40751a6052.tar.gz lwn-e8ed11b9dc07df0134248542ca8e7d40751a6052.zip | |
[PATCH] x86_64: fix 32-bit thread debugging
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/ia32/ptrace32.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c index b98b6d2462f6..2a925e2af390 100644 --- a/arch/x86_64/ia32/ptrace32.c +++ b/arch/x86_64/ia32/ptrace32.c @@ -43,11 +43,11 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val) 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; - child->thread.gs = val & 0xffff; + child->thread.gsindex = val & 0xffff; break; case offsetof(struct user32, regs.ds): if (val && (val & 3) != 3) return -EIO; @@ -138,10 +138,10 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) switch (regno) { case offsetof(struct user32, regs.fs): - *val = child->thread.fs; + *val = child->thread.fsindex; 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; |