Commit 613e1def authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

[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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 17f34580
......@@ -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;
......
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