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ptrace: cleanup arch_ptrace() on sparc

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Factor out struct fps and remove redundant castings.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Namhyung Kim 2010-10-27 15:34:03 -07:00 committed by Linus Torvalds
parent 9e1cb20619
commit a9384e23ab
2 changed files with 24 additions and 38 deletions
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54
arch/sparc/kernel/ptrace_32.c
View file

@ -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;

8
arch/sparc/kernel/ptrace_64.c
View file

@ -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)