[S390] Remove self ptrace IEEE_IP hack.
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>
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@ -607,8 +607,6 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
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}
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}
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#endif
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#endif
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#define PT32_IEEE_IP 0x13c
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static int
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static int
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do_ptrace(struct task_struct *child, long request, long addr, long data)
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do_ptrace(struct task_struct *child, long request, long addr, long data)
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{
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{
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@ -617,24 +615,6 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
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if (request == PTRACE_ATTACH)
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if (request == PTRACE_ATTACH)
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return ptrace_attach(child);
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return ptrace_attach(child);
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/*
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* Special cases to get/store the ieee instructions pointer.
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*/
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if (child == current) {
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if (request == PTRACE_PEEKUSR && addr == PT_IEEE_IP)
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return peek_user(child, addr, data);
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if (request == PTRACE_POKEUSR && addr == PT_IEEE_IP)
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return poke_user(child, addr, data);
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#ifdef CONFIG_COMPAT
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if (request == PTRACE_PEEKUSR &&
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addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
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return peek_user_emu31(child, addr, data);
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if (request == PTRACE_POKEUSR &&
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addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
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return poke_user_emu31(child, addr, data);
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#endif
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}
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ret = ptrace_check_attach(child, request == PTRACE_KILL);
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ret = ptrace_check_attach(child, request == PTRACE_KILL);
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if (ret < 0)
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if (ret < 0)
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return ret;
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return ret;
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