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[S390] Remove self ptrace IEEE_IP hack.

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The self referential PT_IEEE_IP ptrace peek & poke calls have been
broken for that last 6 years. For peek the code always returns 0
instead of the last ieee fault and for poke the code does nothing.
Since nobody noticed the code seems to be superfluous. So lets
remove it.

Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2008-04-30 13:38:48 +02:00
parent 17f3458085
commit 613e1def6b
1 changed files with 0 additions and 20 deletions
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20
arch/s390/kernel/ptrace.c
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@ -607,8 +607,6 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
}
#endif
#define PT32_IEEE_IP 0x13c
static int
do_ptrace(struct task_struct *child, long request, long addr, long data)
{
@ -617,24 +615,6 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
if (request == PTRACE_ATTACH)
return ptrace_attach(child);
/*
* Special cases to get/store the ieee instructions pointer.
*/
if (child == current) {
if (request == PTRACE_PEEKUSR && addr == PT_IEEE_IP)
return peek_user(child, addr, data);
if (request == PTRACE_POKEUSR && addr == PT_IEEE_IP)
return poke_user(child, addr, data);
#ifdef CONFIG_COMPAT
if (request == PTRACE_PEEKUSR &&
addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
return peek_user_emu31(child, addr, data);
if (request == PTRACE_POKEUSR &&
addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
return poke_user_emu31(child, addr, data);
#endif
}
ret = ptrace_check_attach(child, request == PTRACE_KILL);
if (ret < 0)
return ret;