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Subject[RFC PATCH 38/43] ptrace, sparc: cleanup arch_ptrace()
Date
factor out struct fps and remove redundant castings.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
---
arch/sparc/kernel/ptrace_32.c | 54 +++++++++++++++-------------------------
arch/sparc/kernel/ptrace_64.c | 8 +++---
2 files changed, 24 insertions(+), 38 deletions(-)

diff --git a/arch/sparc/kernel/ptrace_32.c b/arch/sparc/kernel/ptrace_32.c
index e08ba4a..27b9e93 100644
--- a/arch/sparc/kernel/ptrace_32.c
+++ b/arch/sparc/kernel/ptrace_32.c
@@ -323,19 +323,35 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
return &user_sparc32_view;
}

+struct fps {
+ unsigned long regs[32];
+ unsigned long fsr;
+ unsigned long flags;
+ unsigned long extra;
+ unsigned long fpqd;
+ struct fq {
+ unsigned long *insnaddr;
+ unsigned long insn;
+ } fpq[16];
+};
+
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
+ void __user *addr2p;
const struct user_regset_view *view;
+ struct pt_regs __user *pregs;
+ struct fps __user *fps;
int ret;

view = task_user_regset_view(current);
+ addr2p = (void __user *) addr2;
+ pregs = (struct pt_regs __user *) addr;
+ fps = (struct fps __user *) addr;

switch(request) {
case PTRACE_GETREGS: {
- struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
-
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
@@ -349,8 +365,6 @@ long arch_ptrace(struct task_struct *child, long request,
}

case PTRACE_SETREGS: {
- struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
-
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
@@ -364,19 +378,6 @@ long arch_ptrace(struct task_struct *child, long request,
}

case PTRACE_GETFPREGS: {
- struct fps {
- unsigned long regs[32];
- unsigned long fsr;
- unsigned long flags;
- unsigned long extra;
- unsigned long fpqd;
- struct fq {
- unsigned long *insnaddr;
- unsigned long insn;
- } fpq[16];
- };
- struct fps __user *fps = (struct fps __user *) addr;
-
ret = copy_regset_to_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
@@ -398,19 +399,6 @@ long arch_ptrace(struct task_struct *child, long request,
}

case PTRACE_SETFPREGS: {
- struct fps {
- unsigned long regs[32];
- unsigned long fsr;
- unsigned long flags;
- unsigned long extra;
- unsigned long fpqd;
- struct fq {
- unsigned long *insnaddr;
- unsigned long insn;
- } fpq[16];
- };
- struct fps __user *fps = (struct fps __user *) addr;
-
ret = copy_regset_from_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
@@ -425,8 +413,7 @@ long arch_ptrace(struct task_struct *child, long request,

case PTRACE_READTEXT:
case PTRACE_READDATA:
- ret = ptrace_readdata(child, addr,
- (void __user *) addr2, data);
+ ret = ptrace_readdata(child, addr, addr2p, data);

if (ret == data)
ret = 0;
@@ -436,8 +423,7 @@ long arch_ptrace(struct task_struct *child, long request,

case PTRACE_WRITETEXT:
case PTRACE_WRITEDATA:
- ret = ptrace_writedata(child, (void __user *) addr2,
- addr, data);
+ ret = ptrace_writedata(child, addr2p, addr, data);

if (ret == data)
ret = 0;
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c
index d9db5a4..9ccc812 100644
--- a/arch/sparc/kernel/ptrace_64.c
+++ b/arch/sparc/kernel/ptrace_64.c
@@ -976,10 +976,12 @@ long arch_ptrace(struct task_struct *child, long request,
unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
struct pt_regs __user *pregs;
struct fps __user *fps;
+ void __user *addr2p;
int ret;

pregs = (struct pt_regs __user *) addr;
fps = (struct fps __user *) addr;
+ addr2p = (void __user *) addr2;

switch (request) {
case PTRACE_PEEKUSR:
@@ -1030,8 +1032,7 @@ long arch_ptrace(struct task_struct *child, long request,

case PTRACE_READTEXT:
case PTRACE_READDATA:
- ret = ptrace_readdata(child, addr,
- (char __user *)addr2, data);
+ ret = ptrace_readdata(child, addr, addr2p, data);
if (ret == data)
ret = 0;
else if (ret >= 0)
@@ -1040,8 +1041,7 @@ long arch_ptrace(struct task_struct *child, long request,

case PTRACE_WRITETEXT:
case PTRACE_WRITEDATA:
- ret = ptrace_writedata(child, (char __user *) addr2,
- addr, data);
+ ret = ptrace_writedata(child, addr2p, addr, data);
if (ret == data)
ret = 0;
else if (ret >= 0)
--
1.7.2.2


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