From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
David Miller <davem@davemloft.net>,
Tony Luck <tony.luck@intel.com>, Will Deacon <will@kernel.org>
Subject: [PATCH 21/41] s390: switch to ->get2()
Date: Mon, 29 Jun 2020 19:26:08 +0100 [thread overview]
Message-ID: <20200629182628.529995-21-viro@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20200629182628.529995-1-viro@ZenIV.linux.org.uk>
From: Al Viro <viro@zeniv.linux.org.uk>
NB: compat NT_S390_LAST_BREAK might be better as compat_long_t
rather than long. User-visible ABI, again...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/s390/kernel/ptrace.c | 199 ++++++++++++++--------------------------------
1 file changed, 58 insertions(+), 141 deletions(-)
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index ce60a459a143..421bfec0a9e9 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -890,28 +890,14 @@ asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
static int s390_regs_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
+ unsigned pos;
if (target == current)
save_access_regs(target->thread.acrs);
- if (kbuf) {
- unsigned long *k = kbuf;
- while (count > 0) {
- *k++ = __peek_user(target, pos);
- count -= sizeof(*k);
- pos += sizeof(*k);
- }
- } else {
- unsigned long __user *u = ubuf;
- while (count > 0) {
- if (__put_user(__peek_user(target, pos), u++))
- return -EFAULT;
- count -= sizeof(*u);
- pos += sizeof(*u);
- }
- }
+ for (pos = 0; pos < sizeof(s390_regs); pos += sizeof(long))
+ membuf_store(&to, __peek_user(target, pos));
return 0;
}
@@ -952,8 +938,8 @@ static int s390_regs_set(struct task_struct *target,
}
static int s390_fpregs_get(struct task_struct *target,
- const struct user_regset *regset, unsigned int pos,
- unsigned int count, void *kbuf, void __user *ubuf)
+ const struct user_regset *regset,
+ struct membuf to)
{
_s390_fp_regs fp_regs;
@@ -963,8 +949,7 @@ static int s390_fpregs_get(struct task_struct *target,
fp_regs.fpc = target->thread.fpu.fpc;
fpregs_store(&fp_regs, &target->thread.fpu);
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fp_regs, 0, -1);
+ return membuf_write(&to, &fp_regs, sizeof(fp_regs));
}
static int s390_fpregs_set(struct task_struct *target,
@@ -1011,20 +996,9 @@ static int s390_fpregs_set(struct task_struct *target,
static int s390_last_break_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- if (count > 0) {
- if (kbuf) {
- unsigned long *k = kbuf;
- *k = target->thread.last_break;
- } else {
- unsigned long __user *u = ubuf;
- if (__put_user(target->thread.last_break, u))
- return -EFAULT;
- }
- }
- return 0;
+ return membuf_store(&to, target->thread.last_break);
}
static int s390_last_break_set(struct task_struct *target,
@@ -1037,16 +1011,13 @@ static int s390_last_break_set(struct task_struct *target,
static int s390_tdb_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
struct pt_regs *regs = task_pt_regs(target);
- unsigned char *data;
if (!(regs->int_code & 0x200))
return -ENODATA;
- data = target->thread.trap_tdb;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, data, 0, 256);
+ return membuf_write(&to, target->thread.trap_tdb, 256);
}
static int s390_tdb_set(struct task_struct *target,
@@ -1059,8 +1030,7 @@ static int s390_tdb_set(struct task_struct *target,
static int s390_vxrs_low_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 vxrs[__NUM_VXRS_LOW];
int i;
@@ -1071,7 +1041,7 @@ static int s390_vxrs_low_get(struct task_struct *target,
save_fpu_regs();
for (i = 0; i < __NUM_VXRS_LOW; i++)
vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, vxrs, 0, -1);
+ return membuf_write(&to, vxrs, sizeof(vxrs));
}
static int s390_vxrs_low_set(struct task_struct *target,
@@ -1100,18 +1070,14 @@ static int s390_vxrs_low_set(struct task_struct *target,
static int s390_vxrs_high_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- __vector128 vxrs[__NUM_VXRS_HIGH];
-
if (!MACHINE_HAS_VX)
return -ENODEV;
if (target == current)
save_fpu_regs();
- memcpy(vxrs, target->thread.fpu.vxrs + __NUM_VXRS_LOW, sizeof(vxrs));
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, vxrs, 0, -1);
+ return membuf_write(&to, target->thread.fpu.vxrs + __NUM_VXRS_LOW,
+ __NUM_VXRS_HIGH * sizeof(__vector128));
}
static int s390_vxrs_high_set(struct task_struct *target,
@@ -1133,12 +1099,9 @@ static int s390_vxrs_high_set(struct task_struct *target,
static int s390_system_call_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- unsigned int *data = &target->thread.system_call;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(unsigned int));
+ return membuf_store(&to, target->thread.system_call);
}
static int s390_system_call_set(struct task_struct *target,
@@ -1153,8 +1116,7 @@ static int s390_system_call_set(struct task_struct *target,
static int s390_gs_cb_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
struct gs_cb *data = target->thread.gs_cb;
@@ -1164,8 +1126,7 @@ static int s390_gs_cb_get(struct task_struct *target,
return -ENODATA;
if (target == current)
save_gs_cb(data);
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(struct gs_cb));
+ return membuf_write(&to, data, sizeof(struct gs_cb));
}
static int s390_gs_cb_set(struct task_struct *target,
@@ -1209,8 +1170,7 @@ static int s390_gs_cb_set(struct task_struct *target,
static int s390_gs_bc_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
struct gs_cb *data = target->thread.gs_bc_cb;
@@ -1218,8 +1178,7 @@ static int s390_gs_bc_get(struct task_struct *target,
return -ENODEV;
if (!data)
return -ENODATA;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(struct gs_cb));
+ return membuf_write(&to, data, sizeof(struct gs_cb));
}
static int s390_gs_bc_set(struct task_struct *target,
@@ -1270,8 +1229,7 @@ static bool is_ri_cb_valid(struct runtime_instr_cb *cb)
static int s390_runtime_instr_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
struct runtime_instr_cb *data = target->thread.ri_cb;
@@ -1280,8 +1238,7 @@ static int s390_runtime_instr_get(struct task_struct *target,
if (!data)
return -ENODATA;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(struct runtime_instr_cb));
+ return membuf_write(&to, data, sizeof(struct runtime_instr_cb));
}
static int s390_runtime_instr_set(struct task_struct *target,
@@ -1337,7 +1294,7 @@ static const struct user_regset s390_regsets[] = {
.n = sizeof(s390_regs) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
- .get = s390_regs_get,
+ .get2 = s390_regs_get,
.set = s390_regs_set,
},
{
@@ -1345,7 +1302,7 @@ static const struct user_regset s390_regsets[] = {
.n = sizeof(s390_fp_regs) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
- .get = s390_fpregs_get,
+ .get2 = s390_fpregs_get,
.set = s390_fpregs_set,
},
{
@@ -1353,7 +1310,7 @@ static const struct user_regset s390_regsets[] = {
.n = 1,
.size = sizeof(unsigned int),
.align = sizeof(unsigned int),
- .get = s390_system_call_get,
+ .get2 = s390_system_call_get,
.set = s390_system_call_set,
},
{
@@ -1361,7 +1318,7 @@ static const struct user_regset s390_regsets[] = {
.n = 1,
.size = sizeof(long),
.align = sizeof(long),
- .get = s390_last_break_get,
+ .get2 = s390_last_break_get,
.set = s390_last_break_set,
},
{
@@ -1369,7 +1326,7 @@ static const struct user_regset s390_regsets[] = {
.n = 1,
.size = 256,
.align = 1,
- .get = s390_tdb_get,
+ .get2 = s390_tdb_get,
.set = s390_tdb_set,
},
{
@@ -1377,7 +1334,7 @@ static const struct user_regset s390_regsets[] = {
.n = __NUM_VXRS_LOW,
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_vxrs_low_get,
+ .get2 = s390_vxrs_low_get,
.set = s390_vxrs_low_set,
},
{
@@ -1385,7 +1342,7 @@ static const struct user_regset s390_regsets[] = {
.n = __NUM_VXRS_HIGH,
.size = sizeof(__vector128),
.align = sizeof(__vector128),
- .get = s390_vxrs_high_get,
+ .get2 = s390_vxrs_high_get,
.set = s390_vxrs_high_set,
},
{
@@ -1393,7 +1350,7 @@ static const struct user_regset s390_regsets[] = {
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_gs_cb_get,
+ .get2 = s390_gs_cb_get,
.set = s390_gs_cb_set,
},
{
@@ -1401,7 +1358,7 @@ static const struct user_regset s390_regsets[] = {
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_gs_bc_get,
+ .get2 = s390_gs_bc_get,
.set = s390_gs_bc_set,
},
{
@@ -1409,7 +1366,7 @@ static const struct user_regset s390_regsets[] = {
.n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_runtime_instr_get,
+ .get2 = s390_runtime_instr_get,
.set = s390_runtime_instr_set,
},
};
@@ -1424,28 +1381,15 @@ static const struct user_regset_view user_s390_view = {
#ifdef CONFIG_COMPAT
static int s390_compat_regs_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
+ unsigned n;
+
if (target == current)
save_access_regs(target->thread.acrs);
- if (kbuf) {
- compat_ulong_t *k = kbuf;
- while (count > 0) {
- *k++ = __peek_user_compat(target, pos);
- count -= sizeof(*k);
- pos += sizeof(*k);
- }
- } else {
- compat_ulong_t __user *u = ubuf;
- while (count > 0) {
- if (__put_user(__peek_user_compat(target, pos), u++))
- return -EFAULT;
- count -= sizeof(*u);
- pos += sizeof(*u);
- }
- }
+ for (n = 0; n < sizeof(s390_compat_regs); n += sizeof(compat_ulong_t))
+ membuf_store(&to, __peek_user_compat(target, n));
return 0;
}
@@ -1487,29 +1431,14 @@ static int s390_compat_regs_set(struct task_struct *target,
static int s390_compat_regs_high_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
compat_ulong_t *gprs_high;
+ int i;
- gprs_high = (compat_ulong_t *)
- &task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
- if (kbuf) {
- compat_ulong_t *k = kbuf;
- while (count > 0) {
- *k++ = *gprs_high;
- gprs_high += 2;
- count -= sizeof(*k);
- }
- } else {
- compat_ulong_t __user *u = ubuf;
- while (count > 0) {
- if (__put_user(*gprs_high, u++))
- return -EFAULT;
- gprs_high += 2;
- count -= sizeof(*u);
- }
- }
+ gprs_high = (compat_ulong_t *)task_pt_regs(target)->gprs;
+ for (i = 0; i < NUM_GPRS; i++, gprs_high += 2)
+ membuf_store(&to, *gprs_high);
return 0;
}
@@ -1548,23 +1477,11 @@ static int s390_compat_regs_high_set(struct task_struct *target,
static int s390_compat_last_break_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- compat_ulong_t last_break;
+ compat_ulong_t last_break = target->thread.last_break;
- if (count > 0) {
- last_break = target->thread.last_break;
- if (kbuf) {
- unsigned long *k = kbuf;
- *k = last_break;
- } else {
- unsigned long __user *u = ubuf;
- if (__put_user(last_break, u))
- return -EFAULT;
- }
- }
- return 0;
+ return membuf_store(&to, (unsigned long)last_break);
}
static int s390_compat_last_break_set(struct task_struct *target,
@@ -1581,7 +1498,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(s390_compat_regs) / sizeof(compat_long_t),
.size = sizeof(compat_long_t),
.align = sizeof(compat_long_t),
- .get = s390_compat_regs_get,
+ .get2 = s390_compat_regs_get,
.set = s390_compat_regs_set,
},
{
@@ -1589,7 +1506,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(s390_fp_regs) / sizeof(compat_long_t),
.size = sizeof(compat_long_t),
.align = sizeof(compat_long_t),
- .get = s390_fpregs_get,
+ .get2 = s390_fpregs_get,
.set = s390_fpregs_set,
},
{
@@ -1597,7 +1514,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = 1,
.size = sizeof(compat_uint_t),
.align = sizeof(compat_uint_t),
- .get = s390_system_call_get,
+ .get2 = s390_system_call_get,
.set = s390_system_call_set,
},
{
@@ -1605,7 +1522,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = 1,
.size = sizeof(long),
.align = sizeof(long),
- .get = s390_compat_last_break_get,
+ .get2 = s390_compat_last_break_get,
.set = s390_compat_last_break_set,
},
{
@@ -1613,7 +1530,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = 1,
.size = 256,
.align = 1,
- .get = s390_tdb_get,
+ .get2 = s390_tdb_get,
.set = s390_tdb_set,
},
{
@@ -1621,7 +1538,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = __NUM_VXRS_LOW,
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_vxrs_low_get,
+ .get2 = s390_vxrs_low_get,
.set = s390_vxrs_low_set,
},
{
@@ -1629,7 +1546,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = __NUM_VXRS_HIGH,
.size = sizeof(__vector128),
.align = sizeof(__vector128),
- .get = s390_vxrs_high_get,
+ .get2 = s390_vxrs_high_get,
.set = s390_vxrs_high_set,
},
{
@@ -1637,7 +1554,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
.size = sizeof(compat_long_t),
.align = sizeof(compat_long_t),
- .get = s390_compat_regs_high_get,
+ .get2 = s390_compat_regs_high_get,
.set = s390_compat_regs_high_set,
},
{
@@ -1645,7 +1562,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_gs_cb_get,
+ .get2 = s390_gs_cb_get,
.set = s390_gs_cb_set,
},
{
@@ -1653,7 +1570,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_gs_bc_get,
+ .get2 = s390_gs_bc_get,
.set = s390_gs_bc_set,
},
{
@@ -1661,7 +1578,7 @@ static const struct user_regset s390_compat_regsets[] = {
.n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
- .get = s390_runtime_instr_get,
+ .get2 = s390_runtime_instr_get,
.set = s390_runtime_instr_set,
},
};
--
2.11.0
next prev parent reply other threads:[~2020-06-29 21:26 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 18:23 [RFC][PATCHSET] regset ->get() rework Al Viro
2020-06-29 18:25 ` [PATCH 01/41] introduction of regset ->get() wrappers, switching ELF coredumps to those Al Viro
2020-06-29 18:25 ` [PATCH 02/41] x86: copy_fpstate_to_sigframe(): have fpregs_soft_get() use kernel buffer Al Viro
2020-06-29 18:25 ` [PATCH 03/41] x86: kill dump_fpu() Al Viro
2020-06-29 18:25 ` [PATCH 04/41] [ia64] sanitize elf_access_gpreg() Al Viro
2020-06-29 18:25 ` [PATCH 05/41] [ia64] teach elf_access_reg() to handle the missing range (r16..r31) Al Viro
2020-06-29 18:25 ` [PATCH 06/41] [ia64] regularize do_gpregs_[gs]et() Al Viro
2020-06-29 18:25 ` [PATCH 07/41] [ia64] access_uarea(): stop bothering with gpregs_[gs]et() Al Viro
2020-06-29 18:25 ` [PATCH 08/41] [ia64] access_uarea(): don't bother with fpregs_[gs]et() Al Viro
2020-06-29 18:25 ` [PATCH 09/41] sparc64: switch genregs32_get() to use of get_from_target() Al Viro
2020-06-29 18:25 ` [PATCH 10/41] sparc32: get rid of odd callers of copy_regset_to_user() Al Viro
2020-06-29 18:25 ` [PATCH 11/41] sparc64: " Al Viro
2020-06-29 18:25 ` [PATCH 12/41] sparc32: get rid of odd callers of copy_regset_from_user() Al Viro
2020-06-29 18:26 ` [PATCH 13/41] sparc64: " Al Viro
2020-06-29 18:26 ` [PATCH 14/41] arm64: take fetching compat reg out of pt_regs into a new helper Al Viro
2020-06-29 18:26 ` [PATCH 15/41] arm64: get rid of copy_regset_to_user() in compat_ptrace_read_user() Al Viro
2020-06-29 18:26 ` [PATCH 16/41] arm64: sanitize compat_ptrace_write_user() Al Viro
2020-06-29 18:26 ` [PATCH 17/41] copy_regset_to_user(): do all copyout at once Al Viro
2020-06-29 18:26 ` [PATCH 18/41] regset: new method and helpers for it Al Viro
2020-06-29 19:23 ` Linus Torvalds
2020-06-29 20:30 ` Al Viro
2020-06-30 13:25 ` Al Viro
2020-06-30 16:53 ` Linus Torvalds
2020-06-30 19:40 ` Al Viro
2020-06-29 18:26 ` [PATCH 19/41] x86: switch to ->get2() Al Viro
2020-06-29 18:26 ` [PATCH 20/41] powerpc: " Al Viro
2020-06-29 18:26 ` Al Viro [this message]
2020-06-29 18:26 ` [PATCH 22/41] sparc: " Al Viro
2020-06-30 13:16 ` Al Viro
2020-06-29 18:26 ` [PATCH 23/41] mips: " Al Viro
2020-06-29 18:26 ` [PATCH 24/41] arm64: " Al Viro
2020-06-29 18:26 ` [PATCH 25/41] sh: convert " Al Viro
2020-06-29 18:26 ` [PATCH 26/41] arm: switch " Al Viro
2020-06-29 18:26 ` [PATCH 27/41] arc: " Al Viro
2020-06-29 18:26 ` [PATCH 28/41] ia64: " Al Viro
2020-06-29 18:26 ` [PATCH 29/41] c6x: " Al Viro
2020-06-29 18:26 ` [PATCH 30/41] riscv: " Al Viro
2020-06-29 18:26 ` [PATCH 31/41] openrisc: " Al Viro
2020-06-29 18:26 ` [PATCH 32/41] h8300: " Al Viro
2020-06-29 18:26 ` [PATCH 33/41] hexagon: " Al Viro
2020-08-11 18:35 ` Brian Cain
2020-06-29 18:26 ` [PATCH 34/41] nios2: " Al Viro
2020-06-29 18:26 ` [PATCH 35/41] nds32: " Al Viro
2020-06-29 18:26 ` [PATCH 36/41] parisc: " Al Viro
2020-06-29 18:26 ` [PATCH 37/41] xtensa: " Al Viro
2020-06-29 18:26 ` [PATCH 38/41] csky: " Al Viro
2020-06-29 18:26 ` [PATCH 39/41] regset: kill ->get() Al Viro
2020-06-29 18:26 ` [PATCH 40/41] regset(): kill ->get_size() Al Viro
2020-06-29 18:26 ` [PATCH 41/41] regset: kill user_regset_copyout{,_zero}() Al Viro
2020-07-23 8:00 ` [RFC][PATCHSET] regset ->get() rework Christoph Hellwig
2020-07-23 17:27 ` Al Viro
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