[PATCH] consolidate sys_ptrace()
The sys_ptrace boilerplate code (everything outside the big switch
statement for the arch-specific requests) is shared by most architectures.
This patch moves it to kernel/ptrace.c and leaves the arch-specific code as
arch_ptrace.
Some architectures have a too different ptrace so we have to exclude them.
They continue to keep their implementations. For sh64 I had to add a
sh64_ptrace wrapper because it does some initialization on the first call.
For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but
SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-By: David Howells <dhowells@redhat.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h
index d462c5e..072375c 100644
--- a/include/asm-alpha/ptrace.h
+++ b/include/asm-alpha/ptrace.h
@@ -67,6 +67,9 @@
};
#ifdef __KERNEL__
+
+#define __ARCH_SYS_PTRACE 1
+
#define user_mode(regs) (((regs)->ps & 8) != 0)
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index a79d1a7..2c703d6 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -229,6 +229,9 @@
};
#ifdef __KERNEL__
+
+#define __ARCH_SYS_PTRACE 1
+
/*
* We use the ia64_psr(regs)->ri to determine which of the three
* instructions in bundle (16 bytes) took the sample. Generate
diff --git a/include/asm-m32r/ptrace.h b/include/asm-m32r/ptrace.h
index 9764171..55cd7ec 100644
--- a/include/asm-m32r/ptrace.h
+++ b/include/asm-m32r/ptrace.h
@@ -145,6 +145,9 @@
#define PTRACE_O_TRACESYSGOOD 0x00000001
#ifdef __KERNEL__
+
+#define __ARCH_SYS_PTRACE 1
+
#if defined(CONFIG_ISA_M32R2) || defined(CONFIG_CHIP_VDEC2)
#define user_mode(regs) ((M32R_PSW_BPM & (regs)->psw) != 0)
#elif defined(CONFIG_ISA_M32R)
diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index fc7c96e..a949cc0 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -468,6 +468,8 @@
};
#ifdef __KERNEL__
+#define __ARCH_SYS_PTRACE 1
+
#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
#define profile_pc(regs) instruction_pointer(regs)
diff --git a/include/asm-sparc/ptrace.h b/include/asm-sparc/ptrace.h
index a8ecb2d..7144970 100644
--- a/include/asm-sparc/ptrace.h
+++ b/include/asm-sparc/ptrace.h
@@ -60,6 +60,9 @@
#define STACKFRAME_SZ sizeof(struct sparc_stackf)
#ifdef __KERNEL__
+
+#define __ARCH_SYS_PTRACE 1
+
#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
unsigned long profile_pc(struct pt_regs *);
diff --git a/include/asm-sparc64/ptrace.h b/include/asm-sparc64/ptrace.h
index 6194f77..7eba90c 100644
--- a/include/asm-sparc64/ptrace.h
+++ b/include/asm-sparc64/ptrace.h
@@ -94,6 +94,9 @@
#define STACKFRAME32_SZ sizeof(struct sparc_stackf32)
#ifdef __KERNEL__
+
+#define __ARCH_SYS_PTRACE 1
+
#define force_successful_syscall_return() \
do { current_thread_info()->syscall_noerror = 1; \
} while (0)
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index dc6f364..b2b3dba 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -78,6 +78,8 @@
#include <linux/compiler.h> /* For unlikely. */
#include <linux/sched.h> /* For struct task_struct. */
+
+extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
extern int ptrace_attach(struct task_struct *tsk);