diff options
| author | Andi Kleen | 2007-10-17 18:04:34 +0200 |
|---|---|---|
| committer | Thomas Gleixner | 2007-10-17 20:15:34 +0200 |
| commit | 2f62c94176af875f22ecd01887a550d5d48092fc (patch) | |
| tree | a88a4a31dc1b5ea55d93835897624dca1c36eb77 /arch | |
| parent | f68fd5f480248ca49e20e30a8e2387bc54694580 (diff) | |
x86_64: Fix compat emulation of PTRACE_GET/SET_THREAD_AREA
Since the 64bit kernel has different indexes for this TLS segments
the address needs to be adjusted in the ptrace 32bit emulation.
[ tglx: arch/x86 adaptation ]
Reported-by: Amnon Shiloh
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/ia32/ptrace32.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c index 4a233ad6269c..f52770ef0ee3 100644 --- a/arch/x86/ia32/ptrace32.c +++ b/arch/x86/ia32/ptrace32.c @@ -228,6 +228,8 @@ static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) return ret; } +#define COMPAT_GDT_ENTRY_TLS_MIN 6 + asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) { struct task_struct *child; @@ -246,8 +248,6 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_SYSCALL: case PTRACE_OLDSETOPTIONS: case PTRACE_SETOPTIONS: - case PTRACE_SET_THREAD_AREA: - case PTRACE_GET_THREAD_AREA: return sys_ptrace(request, pid, addr, data); default: @@ -271,6 +271,12 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_SETSIGINFO: case PTRACE_GETSIGINFO: return ptrace32_siginfo(request, pid, addr, data); + + case PTRACE_SET_THREAD_AREA: + case PTRACE_GET_THREAD_AREA: + return sys_ptrace(request, pid, + addr + GDT_ENTRY_TLS_MIN - COMPAT_GDT_ENTRY_TLS_MIN, + data); } child = ptrace_get_task_struct(pid); |