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ptrace: unify FDPIC implementations

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The Blackfin/FRV/SuperH guys all have the same exact FDPIC ptrace code in
their arch handlers (since they were probably copied & pasted).  Since
these ptrace interfaces are an arch independent aspect of the FDPIC code,
unify them in the common ptrace code so new FDPIC ports don't need to copy
and paste this fundamental stuff yet again.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2010-05-26 14:42:52 -07:00 committed by Linus Torvalds
parent 0ac0c0d0f8
commit 9c1a125921
4 changed files with 29 additions and 67 deletions
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33
arch/blackfin/kernel/ptrace.c
View File

@ -292,28 +292,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
}
#ifdef CONFIG_BINFMT_ELF_FDPIC
case PTRACE_GETFDPIC: {
unsigned long tmp = 0;
switch (addr) {
case_PTRACE_GETFDPIC_EXEC:
case PTRACE_GETFDPIC_EXEC:
tmp = child->mm->context.exec_fdpic_loadmap;
break;
case_PTRACE_GETFDPIC_INTERP:
case PTRACE_GETFDPIC_INTERP:
tmp = child->mm->context.interp_fdpic_loadmap;
break;
default:
break;
}
ret = put_user(tmp, datap);
break;
}
#endif
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKEDATA:
pr_debug("ptrace: PTRACE_PEEKDATA\n");
@ -357,8 +335,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
case PTRACE_PEEKUSR:
switch (addr) {
#ifdef CONFIG_BINFMT_ELF_FDPIC /* backwards compat */
case PT_FDPIC_EXEC: goto case_PTRACE_GETFDPIC_EXEC;
case PT_FDPIC_INTERP: goto case_PTRACE_GETFDPIC_INTERP;
case PT_FDPIC_EXEC:
request = PTRACE_GETFDPIC;
addr = PTRACE_GETFDPIC_EXEC;
goto case_default;
case PT_FDPIC_INTERP:
request = PTRACE_GETFDPIC;
addr = PTRACE_GETFDPIC_INTERP;
goto case_default;
#endif
default:
ret = get_reg(child, addr, datap);
@ -385,6 +369,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
0, sizeof(struct pt_regs),
(const void __user *)data);
case_default:
default:
ret = ptrace_request(child, request, addr, data);
break;

20
arch/frv/kernel/ptrace.c
View File

@ -344,26 +344,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
0, sizeof(child->thread.user->f),
(const void __user *)data);
case PTRACE_GETFDPIC:
tmp = 0;
switch (addr) {
case PTRACE_GETFDPIC_EXEC:
tmp = child->mm->context.exec_fdpic_loadmap;
break;
case PTRACE_GETFDPIC_INTERP:
tmp = child->mm->context.interp_fdpic_loadmap;
break;
default:
break;
}
ret = 0;
if (put_user(tmp, (unsigned long *) data)) {
ret = -EFAULT;
break;
}
break;
default:
ret = ptrace_request(child, request, addr, data);
break;

23
arch/sh/kernel/ptrace_32.c
View File

@ -435,29 +435,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
REGSET_DSP,
0, sizeof(struct pt_dspregs),
(const void __user *)data);
#endif
#ifdef CONFIG_BINFMT_ELF_FDPIC
case PTRACE_GETFDPIC: {
unsigned long tmp = 0;
switch (addr) {
case PTRACE_GETFDPIC_EXEC:
tmp = child->mm->context.exec_fdpic_loadmap;
break;
case PTRACE_GETFDPIC_INTERP:
tmp = child->mm->context.interp_fdpic_loadmap;
break;
default:
break;
}
ret = 0;
if (put_user(tmp, datap)) {
ret = -EFAULT;
break;
}
break;
}
#endif
default:
ret = ptrace_request(child, request, addr, data);

20
kernel/ptrace.c
View File

@ -594,6 +594,26 @@ int ptrace_request(struct task_struct *child, long request,
ret = ptrace_detach(child, data);
break;
#ifdef CONFIG_BINFMT_ELF_FDPIC
case PTRACE_GETFDPIC: {
unsigned long tmp = 0;
switch (addr) {
case PTRACE_GETFDPIC_EXEC:
tmp = child->mm->context.exec_fdpic_loadmap;
break;
case PTRACE_GETFDPIC_INTERP:
tmp = child->mm->context.interp_fdpic_loadmap;
break;
default:
break;
}
ret = put_user(tmp, (unsigned long __user *) data);
break;
}
#endif
#ifdef PTRACE_SINGLESTEP
case PTRACE_SINGLESTEP:
#endif