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Subject[PATCH 20/41] powerpc: switch to ->get2()
Date
From: Al Viro <viro@zeniv.linux.org.uk>

Note: compat variant of REGSET_TM_CGPR is almost certainly wrong;
it claims to be 48*64bit, but just as compat REGSET_GPR it stores
44*32bit of (truncated) registers + 4 32bit zeros... followed by
48 more 32bit zeroes. Might be too late to change - it's a userland
ABI, after all ;-/

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/powerpc/kernel/ptrace/ptrace-altivec.c | 37 ++----
arch/powerpc/kernel/ptrace/ptrace-decl.h | 44 +++----
arch/powerpc/kernel/ptrace/ptrace-novsx.c | 5 +-
arch/powerpc/kernel/ptrace/ptrace-spe.c | 16 +--
arch/powerpc/kernel/ptrace/ptrace-tm.c | 152 +++++++----------------
arch/powerpc/kernel/ptrace/ptrace-view.c | 185 ++++++++++------------------
arch/powerpc/kernel/ptrace/ptrace-vsx.c | 13 +-
7 files changed, 148 insertions(+), 304 deletions(-)

diff --git a/arch/powerpc/kernel/ptrace/ptrace-altivec.c b/arch/powerpc/kernel/ptrace/ptrace-altivec.c
index dd8b75dfbd06..0d9bc4bd4972 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-altivec.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-altivec.c
@@ -41,38 +41,25 @@ int vr_active(struct task_struct *target, const struct user_regset *regset)
* };
*/
int vr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;

flush_altivec_to_thread(target);

BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
- 33 * sizeof(vector128));
- if (!ret) {
- /*
- * Copy out only the low-order word of vrsave.
- */
- int start, end;
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
-
- vrsave.word = target->thread.vrsave;
-
- start = 33 * sizeof(vector128);
- end = start + sizeof(vrsave);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
- start, end);
- }
-
- return ret;
+ membuf_write(&to, &target->thread.vr_state, 33 * sizeof(vector128));
+ /*
+ * Copy out only the low-order word of vrsave.
+ */
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ return membuf_write(&to, &vrsave, sizeof(vrsave));
}

/*
diff --git a/arch/powerpc/kernel/ptrace/ptrace-decl.h b/arch/powerpc/kernel/ptrace/ptrace-decl.h
index 3c8a81999292..67447a6197eb 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-decl.h
+++ b/arch/powerpc/kernel/ptrace/ptrace-decl.h
@@ -63,8 +63,7 @@ enum powerpc_regset {

/* ptrace-(no)vsx */

-int fpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn fpr_get;
int fpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
@@ -72,8 +71,7 @@ int fpr_set(struct task_struct *target, const struct user_regset *regset,
/* ptrace-vsx */

int vsr_active(struct task_struct *target, const struct user_regset *regset);
-int vsr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn vsr_get;
int vsr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
@@ -81,8 +79,7 @@ int vsr_set(struct task_struct *target, const struct user_regset *regset,
/* ptrace-altivec */

int vr_active(struct task_struct *target, const struct user_regset *regset);
-int vr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn vr_get;
int vr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
@@ -90,8 +87,7 @@ int vr_set(struct task_struct *target, const struct user_regset *regset,
/* ptrace-spe */

int evr_active(struct task_struct *target, const struct user_regset *regset);
-int evr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn evr_get;
int evr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
@@ -100,9 +96,8 @@ int evr_set(struct task_struct *target, const struct user_regset *regset,

int gpr32_get_common(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf,
- unsigned long *regs);
+ struct membuf to,
+ unsigned long *regs);
int gpr32_set_common(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
@@ -118,55 +113,46 @@ static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
#endif

int tm_cgpr_active(struct task_struct *target, const struct user_regset *regset);
-int tm_cgpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_cgpr_get;
int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_cfpr_active(struct task_struct *target, const struct user_regset *regset);
-int tm_cfpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_cfpr_get;
int tm_cfpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset);
-int tm_cvmx_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_cvmx_get;
int tm_cvmx_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_cvsx_active(struct task_struct *target, const struct user_regset *regset);
-int tm_cvsx_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_cvsx_get;
int tm_cvsx_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_spr_active(struct task_struct *target, const struct user_regset *regset);
-int tm_spr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_spr_get;
int tm_spr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_tar_active(struct task_struct *target, const struct user_regset *regset);
-int tm_tar_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_tar_get;
int tm_tar_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_ppr_active(struct task_struct *target, const struct user_regset *regset);
-int tm_ppr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_ppr_get;
int tm_ppr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
int tm_dscr_active(struct task_struct *target, const struct user_regset *regset);
-int tm_dscr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_dscr_get;
int tm_dscr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
-int tm_cgpr32_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+user_regset_get2_fn tm_cgpr32_get;
int tm_cgpr32_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf);
diff --git a/arch/powerpc/kernel/ptrace/ptrace-novsx.c b/arch/powerpc/kernel/ptrace/ptrace-novsx.c
index b2dc4e92d11a..b3b36835658a 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-novsx.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-novsx.c
@@ -19,15 +19,14 @@
* };
*/
int fpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));

flush_fp_to_thread(target);

- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.fp_state, 0, -1);
+ return membuf_write(&to, &target->thread.fp_state, 33 * sizeof(u64));
}

/*
diff --git a/arch/powerpc/kernel/ptrace/ptrace-spe.c b/arch/powerpc/kernel/ptrace/ptrace-spe.c
index 68b86b4a4be4..47034d069045 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-spe.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-spe.c
@@ -23,25 +23,17 @@ int evr_active(struct task_struct *target, const struct user_regset *regset)
}

int evr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
flush_spe_to_thread(target);

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.evr,
- 0, sizeof(target->thread.evr));
+ membuf_write(&to, &target->thread.evr, sizeof(target->thread.evr));

BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
offsetof(struct thread_struct, spefscr));

- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.acc,
- sizeof(target->thread.evr), -1);
-
- return ret;
+ return membuf_write(&to, &target->thread.acc,
+ sizeof(u64) + sizeof(u32));
}

int evr_set(struct task_struct *target, const struct user_regset *regset,
diff --git a/arch/powerpc/kernel/ptrace/ptrace-tm.c b/arch/powerpc/kernel/ptrace/ptrace-tm.c
index 32d62c606681..54f2d076206f 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-tm.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-tm.c
@@ -70,10 +70,7 @@ int tm_cgpr_active(struct task_struct *target, const struct user_regset *regset)
* tm_cgpr_get - get CGPR registers
* @target: The target task.
* @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
+ * @to: Destination of copy.
*
* This function gets transaction checkpointed GPR registers.
*
@@ -87,10 +84,8 @@ int tm_cgpr_active(struct task_struct *target, const struct user_regset *regset)
* };
*/
int tm_cgpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
if (!cpu_has_feature(CPU_FTR_TM))
return -ENODEV;

@@ -101,31 +96,18 @@ int tm_cgpr_get(struct task_struct *target, const struct user_regset *regset,
flush_fp_to_thread(target);
flush_altivec_to_thread(target);

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs,
- 0, offsetof(struct pt_regs, msr));
- if (!ret) {
- unsigned long msr = get_user_ckpt_msr(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
- offsetof(struct pt_regs, msr),
- offsetof(struct pt_regs, msr) +
- sizeof(msr));
- }
+ membuf_write(&to, &target->thread.ckpt_regs,
+ offsetof(struct pt_regs, msr));
+ membuf_store(&to, get_user_ckpt_msr(target));

BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
offsetof(struct pt_regs, msr) + sizeof(long));

- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs.orig_gpr3,
- offsetof(struct pt_regs, orig_gpr3),
- sizeof(struct user_pt_regs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct user_pt_regs), -1);
-
- return ret;
+ membuf_write(&to, &target->thread.ckpt_regs.orig_gpr3,
+ sizeof(struct user_pt_regs) -
+ offsetof(struct pt_regs, orig_gpr3));
+ return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) -
+ sizeof(struct user_pt_regs));
}

/*
@@ -229,10 +211,7 @@ int tm_cfpr_active(struct task_struct *target, const struct user_regset *regset)
* tm_cfpr_get - get CFPR registers
* @target: The target task.
* @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
+ * @to: Destination of copy.
*
* This function gets in transaction checkpointed FPR registers.
*
@@ -247,7 +226,7 @@ int tm_cfpr_active(struct task_struct *target, const struct user_regset *regset)
*};
*/
int tm_cfpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
u64 buf[33];
int i;
@@ -266,7 +245,7 @@ int tm_cfpr_get(struct task_struct *target, const struct user_regset *regset,
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.TS_CKFPR(i);
buf[32] = target->thread.ckfp_state.fpscr;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ return membuf_write(&to, buf, sizeof(buf));
}

/**
@@ -344,10 +323,7 @@ int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset)
* tm_cvmx_get - get CMVX registers
* @target: The target task.
* @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
+ * @to: Destination of copy.
*
* This function gets in transaction checkpointed VMX registers.
*
@@ -363,10 +339,12 @@ int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset)
*};
*/
int tm_cvmx_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));

if (!cpu_has_feature(CPU_FTR_TM))
@@ -380,23 +358,13 @@ int tm_cvmx_get(struct task_struct *target, const struct user_regset *regset,
flush_fp_to_thread(target);
flush_altivec_to_thread(target);

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.ckvr_state,
- 0, 33 * sizeof(vector128));
- if (!ret) {
- /*
- * Copy out only the low-order word of vrsave.
- */
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
- vrsave.word = target->thread.ckvrsave;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
- 33 * sizeof(vector128), -1);
- }
-
- return ret;
+ membuf_write(&to, &target->thread.ckvr_state, 33 * sizeof(vector128));
+ /*
+ * Copy out only the low-order word of vrsave.
+ */
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.ckvrsave;
+ return membuf_write(&to, &vrsave, sizeof(vrsave));
}

/**
@@ -484,10 +452,7 @@ int tm_cvsx_active(struct task_struct *target, const struct user_regset *regset)
* tm_cvsx_get - get CVSX registers
* @target: The target task.
* @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
+ * @to: Destination of copy.
*
* This function gets in transaction checkpointed VSX registers.
*
@@ -501,10 +466,10 @@ int tm_cvsx_active(struct task_struct *target, const struct user_regset *regset)
*};
*/
int tm_cvsx_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
u64 buf[32];
- int ret, i;
+ int i;

if (!cpu_has_feature(CPU_FTR_TM))
return -ENODEV;
@@ -520,10 +485,7 @@ int tm_cvsx_get(struct task_struct *target, const struct user_regset *regset,

for (i = 0; i < 32 ; i++)
buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
-
- return ret;
+ return membuf_write(&to, buf, 32 * sizeof(double));
}

/**
@@ -597,10 +559,7 @@ int tm_spr_active(struct task_struct *target, const struct user_regset *regset)
* tm_spr_get - get the TM related SPR registers
* @target: The target task.
* @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
+ * @to: Destination of copy.
*
* This function gets transactional memory related SPR registers.
* The userspace interface buffer layout is as follows.
@@ -612,10 +571,8 @@ int tm_spr_active(struct task_struct *target, const struct user_regset *regset)
* };
*/
int tm_spr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
/* Build tests */
BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
@@ -630,21 +587,11 @@ int tm_spr_get(struct task_struct *target, const struct user_regset *regset,
flush_altivec_to_thread(target);

/* TFHAR register */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfhar, 0, sizeof(u64));
-
+ membuf_write(&to, &target->thread.tm_tfhar, sizeof(u64));
/* TEXASR register */
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_texasr, sizeof(u64),
- 2 * sizeof(u64));
-
+ membuf_write(&to, &target->thread.tm_texasr, sizeof(u64));
/* TFIAR register */
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfiar,
- 2 * sizeof(u64), 3 * sizeof(u64));
- return ret;
+ return membuf_write(&to, &target->thread.tm_tfiar, sizeof(u64));
}

/**
@@ -714,19 +661,15 @@ int tm_tar_active(struct task_struct *target, const struct user_regset *regset)
}

int tm_tar_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
if (!cpu_has_feature(CPU_FTR_TM))
return -ENODEV;

if (!MSR_TM_ACTIVE(target->thread.regs->msr))
return -ENODATA;

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tar, 0, sizeof(u64));
- return ret;
+ return membuf_write(&to, &target->thread.tm_tar, sizeof(u64));
}

int tm_tar_set(struct task_struct *target, const struct user_regset *regset,
@@ -759,19 +702,15 @@ int tm_ppr_active(struct task_struct *target, const struct user_regset *regset)


int tm_ppr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
if (!cpu_has_feature(CPU_FTR_TM))
return -ENODEV;

if (!MSR_TM_ACTIVE(target->thread.regs->msr))
return -ENODATA;

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_ppr, 0, sizeof(u64));
- return ret;
+ return membuf_write(&to, &target->thread.tm_ppr, sizeof(u64));
}

int tm_ppr_set(struct task_struct *target, const struct user_regset *regset,
@@ -803,19 +742,15 @@ int tm_dscr_active(struct task_struct *target, const struct user_regset *regset)
}

int tm_dscr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int ret;
-
if (!cpu_has_feature(CPU_FTR_TM))
return -ENODEV;

if (!MSR_TM_ACTIVE(target->thread.regs->msr))
return -ENODATA;

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_dscr, 0, sizeof(u64));
- return ret;
+ return membuf_write(&to, &target->thread.tm_dscr, sizeof(u64));
}

int tm_dscr_set(struct task_struct *target, const struct user_regset *regset,
@@ -836,10 +771,11 @@ int tm_dscr_set(struct task_struct *target, const struct user_regset *regset,
}

int tm_cgpr32_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
+ gpr32_get_common(target, regset, to,
&target->thread.ckpt_regs.gpr[0]);
+ return membuf_zero(&to, ELF_NGREG * sizeof(u32));
}

int tm_cgpr32_set(struct task_struct *target, const struct user_regset *regset,
diff --git a/arch/powerpc/kernel/ptrace/ptrace-view.c b/arch/powerpc/kernel/ptrace/ptrace-view.c
index caeb5822a8f4..9dbd786a1e08 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-view.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-view.c
@@ -215,9 +215,9 @@ int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
}

static int gpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- int i, ret;
+ int i;

if (target->thread.regs == NULL)
return -EIO;
@@ -228,30 +228,17 @@ static int gpr_get(struct task_struct *target, const struct user_regset *regset,
target->thread.regs->gpr[i] = NV_REG_POISON;
}

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- target->thread.regs,
- 0, offsetof(struct pt_regs, msr));
- if (!ret) {
- unsigned long msr = get_user_msr(target);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
- offsetof(struct pt_regs, msr),
- offsetof(struct pt_regs, msr) +
- sizeof(msr));
- }
+ membuf_write(&to, target->thread.regs, offsetof(struct pt_regs, msr));
+ membuf_store(&to, get_user_msr(target));

BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
offsetof(struct pt_regs, msr) + sizeof(long));

- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->orig_gpr3,
- offsetof(struct pt_regs, orig_gpr3),
- sizeof(struct user_pt_regs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct user_pt_regs), -1);
-
- return ret;
+ membuf_write(&to, &target->thread.regs->orig_gpr3,
+ sizeof(struct user_pt_regs) -
+ offsetof(struct pt_regs, orig_gpr3));
+ return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) -
+ sizeof(struct user_pt_regs));
}

static int gpr_set(struct task_struct *target, const struct user_regset *regset,
@@ -309,10 +296,9 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,

#ifdef CONFIG_PPC64
static int ppr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->ppr, 0, sizeof(u64));
+ return membuf_write(&to, &target->thread.regs->ppr, sizeof(u64));
}

static int ppr_set(struct task_struct *target, const struct user_regset *regset,
@@ -324,10 +310,9 @@ static int ppr_set(struct task_struct *target, const struct user_regset *regset,
}

static int dscr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.dscr, 0, sizeof(u64));
+ return membuf_write(&to, &target->thread.dscr, sizeof(u64));
}
static int dscr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count, const void *kbuf,
@@ -339,10 +324,9 @@ static int dscr_set(struct task_struct *target, const struct user_regset *regset
#endif
#ifdef CONFIG_PPC_BOOK3S_64
static int tar_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tar, 0, sizeof(u64));
+ return membuf_write(&to, &target->thread.tar, sizeof(u64));
}
static int tar_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count, const void *kbuf,
@@ -364,7 +348,7 @@ static int ebb_active(struct task_struct *target, const struct user_regset *regs
}

static int ebb_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
/* Build tests */
BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
@@ -376,8 +360,7 @@ static int ebb_get(struct task_struct *target, const struct user_regset *regset,
if (!target->thread.used_ebb)
return -ENODATA;

- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.ebbrr,
- 0, 3 * sizeof(unsigned long));
+ return membuf_write(&to, &target->thread.ebbrr, 3 * sizeof(unsigned long));
}

static int ebb_set(struct task_struct *target, const struct user_regset *regset,
@@ -420,7 +403,7 @@ static int pmu_active(struct task_struct *target, const struct user_regset *regs
}

static int pmu_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
/* Build tests */
BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
@@ -431,8 +414,7 @@ static int pmu_get(struct task_struct *target, const struct user_regset *regset,
if (!cpu_has_feature(CPU_FTR_ARCH_207S))
return -ENODEV;

- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.siar,
- 0, 5 * sizeof(unsigned long));
+ return membuf_write(&to, &target->thread.siar, 5 * sizeof(unsigned long));
}

static int pmu_set(struct task_struct *target, const struct user_regset *regset,
@@ -486,7 +468,7 @@ static int pkey_active(struct task_struct *target, const struct user_regset *reg
}

static int pkey_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
BUILD_BUG_ON(TSO(amr) + sizeof(unsigned long) != TSO(iamr));
BUILD_BUG_ON(TSO(iamr) + sizeof(unsigned long) != TSO(uamor));
@@ -494,8 +476,7 @@ static int pkey_get(struct task_struct *target, const struct user_regset *regset
if (!arch_pkeys_enabled())
return -ENODEV;

- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.amr,
- 0, ELF_NPKEY * sizeof(unsigned long));
+ return membuf_write(&to, &target->thread.amr, ELF_NPKEY * sizeof(unsigned long));
}

static int pkey_set(struct task_struct *target, const struct user_regset *regset,
@@ -529,110 +510,110 @@ static const struct user_regset native_regsets[] = {
[REGSET_GPR] = {
.core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
.size = sizeof(long), .align = sizeof(long),
- .get = gpr_get, .set = gpr_set
+ .get2 = gpr_get, .set = gpr_set
},
[REGSET_FPR] = {
.core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
.size = sizeof(double), .align = sizeof(double),
- .get = fpr_get, .set = fpr_set
+ .get2 = fpr_get, .set = fpr_set
},
#ifdef CONFIG_ALTIVEC
[REGSET_VMX] = {
.core_note_type = NT_PPC_VMX, .n = 34,
.size = sizeof(vector128), .align = sizeof(vector128),
- .active = vr_active, .get = vr_get, .set = vr_set
+ .active = vr_active, .get2 = vr_get, .set = vr_set
},
#endif
#ifdef CONFIG_VSX
[REGSET_VSX] = {
.core_note_type = NT_PPC_VSX, .n = 32,
.size = sizeof(double), .align = sizeof(double),
- .active = vsr_active, .get = vsr_get, .set = vsr_set
+ .active = vsr_active, .get2 = vsr_get, .set = vsr_set
},
#endif
#ifdef CONFIG_SPE
[REGSET_SPE] = {
.core_note_type = NT_PPC_SPE, .n = 35,
.size = sizeof(u32), .align = sizeof(u32),
- .active = evr_active, .get = evr_get, .set = evr_set
+ .active = evr_active, .get2 = evr_get, .set = evr_set
},
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
[REGSET_TM_CGPR] = {
.core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
.size = sizeof(long), .align = sizeof(long),
- .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
+ .active = tm_cgpr_active, .get2 = tm_cgpr_get, .set = tm_cgpr_set
},
[REGSET_TM_CFPR] = {
.core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
.size = sizeof(double), .align = sizeof(double),
- .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ .active = tm_cfpr_active, .get2 = tm_cfpr_get, .set = tm_cfpr_set
},
[REGSET_TM_CVMX] = {
.core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
.size = sizeof(vector128), .align = sizeof(vector128),
- .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ .active = tm_cvmx_active, .get2 = tm_cvmx_get, .set = tm_cvmx_set
},
[REGSET_TM_CVSX] = {
.core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
.size = sizeof(double), .align = sizeof(double),
- .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ .active = tm_cvsx_active, .get2 = tm_cvsx_get, .set = tm_cvsx_set
},
[REGSET_TM_SPR] = {
.core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ .active = tm_spr_active, .get2 = tm_spr_get, .set = tm_spr_set
},
[REGSET_TM_CTAR] = {
.core_note_type = NT_PPC_TM_CTAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ .active = tm_tar_active, .get2 = tm_tar_get, .set = tm_tar_set
},
[REGSET_TM_CPPR] = {
.core_note_type = NT_PPC_TM_CPPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ .active = tm_ppr_active, .get2 = tm_ppr_get, .set = tm_ppr_set
},
[REGSET_TM_CDSCR] = {
.core_note_type = NT_PPC_TM_CDSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ .active = tm_dscr_active, .get2 = tm_dscr_get, .set = tm_dscr_set
},
#endif
#ifdef CONFIG_PPC64
[REGSET_PPR] = {
.core_note_type = NT_PPC_PPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = ppr_get, .set = ppr_set
+ .get2 = ppr_get, .set = ppr_set
},
[REGSET_DSCR] = {
.core_note_type = NT_PPC_DSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = dscr_get, .set = dscr_set
+ .get2 = dscr_get, .set = dscr_set
},
#endif
#ifdef CONFIG_PPC_BOOK3S_64
[REGSET_TAR] = {
.core_note_type = NT_PPC_TAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = tar_get, .set = tar_set
+ .get2 = tar_get, .set = tar_set
},
[REGSET_EBB] = {
.core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
.size = sizeof(u64), .align = sizeof(u64),
- .active = ebb_active, .get = ebb_get, .set = ebb_set
+ .active = ebb_active, .get2 = ebb_get, .set = ebb_set
},
[REGSET_PMR] = {
.core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
.size = sizeof(u64), .align = sizeof(u64),
- .active = pmu_active, .get = pmu_get, .set = pmu_set
+ .active = pmu_active, .get2 = pmu_get, .set = pmu_set
},
#endif
#ifdef CONFIG_PPC_MEM_KEYS
[REGSET_PKEY] = {
.core_note_type = NT_PPC_PKEY, .n = ELF_NPKEY,
.size = sizeof(u64), .align = sizeof(u64),
- .active = pkey_active, .get = pkey_get, .set = pkey_set
+ .active = pkey_active, .get2 = pkey_get, .set = pkey_set
},
#endif
};
@@ -646,49 +627,16 @@ const struct user_regset_view user_ppc_native_view = {

int gpr32_get_common(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf,
- unsigned long *regs)
+ struct membuf to, unsigned long *regs)
{
- compat_ulong_t *k = kbuf;
- compat_ulong_t __user *u = ubuf;
- compat_ulong_t reg;
-
- pos /= sizeof(reg);
- count /= sizeof(reg);
-
- if (kbuf)
- for (; count > 0 && pos < PT_MSR; --count)
- *k++ = regs[pos++];
- else
- for (; count > 0 && pos < PT_MSR; --count)
- if (__put_user((compat_ulong_t)regs[pos++], u++))
- return -EFAULT;
-
- if (count > 0 && pos == PT_MSR) {
- reg = get_user_msr(target);
- if (kbuf)
- *k++ = reg;
- else if (__put_user(reg, u++))
- return -EFAULT;
- ++pos;
- --count;
- }
-
- if (kbuf)
- for (; count > 0 && pos < PT_REGS_COUNT; --count)
- *k++ = regs[pos++];
- else
- for (; count > 0 && pos < PT_REGS_COUNT; --count)
- if (__put_user((compat_ulong_t)regs[pos++], u++))
- return -EFAULT;
+ int i;

- kbuf = k;
- ubuf = u;
- pos *= sizeof(reg);
- count *= sizeof(reg);
- return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- PT_REGS_COUNT * sizeof(reg), -1);
+ for (i = 0; i < PT_MSR; i++)
+ membuf_store(&to, (u32)regs[i]);
+ membuf_store(&to, (u32)get_user_msr(target));
+ for (i++ ; i < PT_REGS_COUNT; i++)
+ membuf_store(&to, (u32)regs[i]);
+ return membuf_zero(&to, (ELF_NGREG - PT_REGS_COUNT) * sizeof(u32));
}

int gpr32_set_common(struct task_struct *target,
@@ -761,8 +709,7 @@ int gpr32_set_common(struct task_struct *target,

static int gpr32_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
int i;

@@ -777,7 +724,7 @@ static int gpr32_get(struct task_struct *target,
for (i = 14; i < 32; i++)
target->thread.regs->gpr[i] = NV_REG_POISON;
}
- return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
+ return gpr32_get_common(target, regset, to,
&target->thread.regs->gpr[0]);
}

@@ -801,25 +748,25 @@ static const struct user_regset compat_regsets[] = {
[REGSET_GPR] = {
.core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
.size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
- .get = gpr32_get, .set = gpr32_set
+ .get2 = gpr32_get, .set = gpr32_set
},
[REGSET_FPR] = {
.core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
.size = sizeof(double), .align = sizeof(double),
- .get = fpr_get, .set = fpr_set
+ .get2 = fpr_get, .set = fpr_set
},
#ifdef CONFIG_ALTIVEC
[REGSET_VMX] = {
.core_note_type = NT_PPC_VMX, .n = 34,
.size = sizeof(vector128), .align = sizeof(vector128),
- .active = vr_active, .get = vr_get, .set = vr_set
+ .active = vr_active, .get2 = vr_get, .set = vr_set
},
#endif
#ifdef CONFIG_SPE
[REGSET_SPE] = {
.core_note_type = NT_PPC_SPE, .n = 35,
.size = sizeof(u32), .align = sizeof(u32),
- .active = evr_active, .get = evr_get, .set = evr_set
+ .active = evr_active, .get2 = evr_get, .set = evr_set
},
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -827,66 +774,66 @@ static const struct user_regset compat_regsets[] = {
.core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
.size = sizeof(long), .align = sizeof(long),
.active = tm_cgpr_active,
- .get = tm_cgpr32_get, .set = tm_cgpr32_set
+ .get2 = tm_cgpr32_get, .set = tm_cgpr32_set
},
[REGSET_TM_CFPR] = {
.core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
.size = sizeof(double), .align = sizeof(double),
- .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ .active = tm_cfpr_active, .get2 = tm_cfpr_get, .set = tm_cfpr_set
},
[REGSET_TM_CVMX] = {
.core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
.size = sizeof(vector128), .align = sizeof(vector128),
- .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ .active = tm_cvmx_active, .get2 = tm_cvmx_get, .set = tm_cvmx_set
},
[REGSET_TM_CVSX] = {
.core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
.size = sizeof(double), .align = sizeof(double),
- .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ .active = tm_cvsx_active, .get2 = tm_cvsx_get, .set = tm_cvsx_set
},
[REGSET_TM_SPR] = {
.core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ .active = tm_spr_active, .get2 = tm_spr_get, .set = tm_spr_set
},
[REGSET_TM_CTAR] = {
.core_note_type = NT_PPC_TM_CTAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ .active = tm_tar_active, .get2 = tm_tar_get, .set = tm_tar_set
},
[REGSET_TM_CPPR] = {
.core_note_type = NT_PPC_TM_CPPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ .active = tm_ppr_active, .get2 = tm_ppr_get, .set = tm_ppr_set
},
[REGSET_TM_CDSCR] = {
.core_note_type = NT_PPC_TM_CDSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ .active = tm_dscr_active, .get2 = tm_dscr_get, .set = tm_dscr_set
},
#endif
#ifdef CONFIG_PPC64
[REGSET_PPR] = {
.core_note_type = NT_PPC_PPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = ppr_get, .set = ppr_set
+ .get2 = ppr_get, .set = ppr_set
},
[REGSET_DSCR] = {
.core_note_type = NT_PPC_DSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = dscr_get, .set = dscr_set
+ .get2 = dscr_get, .set = dscr_set
},
#endif
#ifdef CONFIG_PPC_BOOK3S_64
[REGSET_TAR] = {
.core_note_type = NT_PPC_TAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
- .get = tar_get, .set = tar_set
+ .get2 = tar_get, .set = tar_set
},
[REGSET_EBB] = {
.core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
.size = sizeof(u64), .align = sizeof(u64),
- .active = ebb_active, .get = ebb_get, .set = ebb_set
+ .active = ebb_active, .get2 = ebb_get, .set = ebb_set
},
#endif
};
diff --git a/arch/powerpc/kernel/ptrace/ptrace-vsx.c b/arch/powerpc/kernel/ptrace/ptrace-vsx.c
index d53466d49cc0..1da4303128ef 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-vsx.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-vsx.c
@@ -19,7 +19,7 @@
* };
*/
int fpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
u64 buf[33];
int i;
@@ -30,7 +30,7 @@ int fpr_get(struct task_struct *target, const struct user_regset *regset,
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.TS_FPR(i);
buf[32] = target->thread.fp_state.fpscr;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ return membuf_write(&to, buf, 33 * sizeof(u64));
}

/*
@@ -95,10 +95,10 @@ int vsr_active(struct task_struct *target, const struct user_regset *regset)
* };
*/
int vsr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+ struct membuf to)
{
u64 buf[32];
- int ret, i;
+ int i;

flush_tmregs_to_thread(target);
flush_fp_to_thread(target);
@@ -108,10 +108,7 @@ int vsr_get(struct task_struct *target, const struct user_regset *regset,
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];

- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
-
- return ret;
+ return membuf_write(&to, buf, 32 * sizeof(double));
}

/*
--
2.11.0
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