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MIPS: Remove get_fs/set_fs

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All get_fs/set_fs calls in MIPS code are gone, so remove implementation
of it.  With the clear separation of user/kernel space access we no
longer need the EVA special handling, so get rid of that, too.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Thomas Bogendoerfer 2021-04-01 14:56:37 +02:00
parent 45deb5faeb
commit 04324f44cb
11 changed files with 193 additions and 403 deletions
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1
arch/mips/Kconfig
View File

@ -94,7 +94,6 @@ config MIPS
select PERF_USE_VMALLOC
select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
select RTC_LIB
select SET_FS
select SYSCTL_EXCEPTION_TRACE
select VIRT_TO_BUS
select ARCH_HAS_ELFCORE_COMPAT

4
arch/mips/include/asm/processor.h
View File

@ -221,10 +221,6 @@ struct nlm_cop2_state {
#define COP2_INIT
#endif
typedef struct {
unsigned long seg;
} mm_segment_t;
#ifdef CONFIG_CPU_HAS_MSA
# define ARCH_MIN_TASKALIGN 16
# define FPU_ALIGN __aligned(16)

6
arch/mips/include/asm/thread_info.h
View File

@ -28,11 +28,6 @@ struct thread_info {
unsigned long tp_value; /* thread pointer */
__u32 cpu; /* current CPU */
int preempt_count; /* 0 => preemptable, <0 => BUG */
mm_segment_t addr_limit; /*
* thread address space limit:
* 0x7fffffff for user-thead
* 0xffffffff for kernel-thread
*/
struct pt_regs *regs;
long syscall; /* syscall number */
};
@ -46,7 +41,6 @@ struct thread_info {
.flags = _TIF_FIXADE, \
.cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
.addr_limit = KERNEL_DS, \
}
/*

455
arch/mips/include/asm/uaccess.h
View File

@ -16,13 +16,6 @@
#include <asm/asm-eva.h>
#include <asm/extable.h>
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons, these macros are grossly misnamed.
*/
#ifdef CONFIG_32BIT
#define __UA_LIMIT 0x80000000UL
@ -49,38 +42,6 @@ extern u64 __ua_limit;
#endif /* CONFIG_64BIT */
/*
* USER_DS is a bitmask that has the bits set that may not be set in a valid
* userspace address. Note that we limit 32-bit userspace to 0x7fff8000 but
* the arithmetic we're doing only works if the limit is a power of two, so
* we use 0x80000000 here on 32-bit kernels. If a process passes an invalid
* address in this range it's the process's problem, not ours :-)
*/
#define KERNEL_DS ((mm_segment_t) { 0UL })
#define USER_DS ((mm_segment_t) { __UA_LIMIT })
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
/*
* eva_kernel_access() - determine whether kernel memory access on an EVA system
*
* Determines whether memory accesses should be performed to kernel memory
* on a system using Extended Virtual Addressing (EVA).
*
* Return: true if a kernel memory access on an EVA system, else false.
*/
static inline bool eva_kernel_access(void)
{
if (!IS_ENABLED(CONFIG_EVA))
return false;
return uaccess_kernel();
}
/*
* Is a address valid? This does a straightforward calculation rather
* than tests.
@ -118,7 +79,7 @@ static inline bool eva_kernel_access(void)
static inline int __access_ok(const void __user *p, unsigned long size)
{
unsigned long addr = (unsigned long)p;
return (get_fs().seg & (addr | (addr + size) | __ua_size(size))) == 0;
return (__UA_LIMIT & (addr | (addr + size) | __ua_size(size))) == 0;
}
#define access_ok(addr, size) \
@ -215,43 +176,6 @@ static inline int __access_ok(const void __user *p, unsigned long size)
struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct __user *)(x))
/*
* Yuck. We need two variants, one for 64bit operation and one
* for 32 bit mode and old iron.
*/
#ifndef CONFIG_EVA
#define __get_kernel_common(val, size, ptr) __get_user_common(val, size, ptr)
#else
/*
* Kernel specific functions for EVA. We need to use normal load instructions
* to read data from kernel when operating in EVA mode. We use these macros to
* avoid redefining __get_user_asm for EVA.
*/
#undef _loadd
#undef _loadw
#undef _loadh
#undef _loadb
#ifdef CONFIG_32BIT
#define _loadd _loadw
#else
#define _loadd(reg, addr) "ld " reg ", " addr
#endif
#define _loadw(reg, addr) "lw " reg ", " addr
#define _loadh(reg, addr) "lh " reg ", " addr
#define _loadb(reg, addr) "lb " reg ", " addr
#define __get_kernel_common(val, size, ptr) \
do { \
switch (size) { \
case 1: __get_data_asm(val, _loadb, ptr); break; \
case 2: __get_data_asm(val, _loadh, ptr); break; \
case 4: __get_data_asm(val, _loadw, ptr); break; \
case 8: __GET_DW(val, _loadd, ptr); break; \
default: __get_user_unknown(); break; \
} \
} while (0)
#endif
#ifdef CONFIG_32BIT
#define __GET_DW(val, insn, ptr) __get_data_asm_ll32(val, insn, ptr)
#endif
@ -276,12 +200,9 @@ do { \
({ \
int __gu_err; \
\
if (eva_kernel_access()) { \
__get_kernel_common((x), size, ptr); \
} else { \
__chk_user_ptr(ptr); \
__get_user_common((x), size, ptr); \
} \
__chk_user_ptr(ptr); \
__get_user_common((x), size, ptr); \
\
__gu_err; \
})
@ -291,11 +212,8 @@ do { \
const __typeof__(*(ptr)) __user * __gu_ptr = (ptr); \
\
might_fault(); \
if (likely(access_ok( __gu_ptr, size))) { \
if (eva_kernel_access()) \
__get_kernel_common((x), size, __gu_ptr); \
else \
__get_user_common((x), size, __gu_ptr); \
if (likely(access_ok(__gu_ptr, size))) { \
__get_user_common((x), size, __gu_ptr); \
} else \
(x) = 0; \
\
@ -361,46 +279,31 @@ do { \
do { \
int __gu_err; \
\
__get_kernel_common(*((type *)(dst)), sizeof(type), \
(__force type *)(src)); \
switch (sizeof(type)) { \
case 1: \
__get_data_asm(*(type *)(dst), kernel_lb, \
(__force type *)(src)); \
break; \
case 2: \
__get_data_asm(*(type *)(dst), kernel_lh, \
(__force type *)(src)); \
break; \
case 4: \
__get_data_asm(*(type *)(dst), kernel_lw, \
(__force type *)(src)); \
break; \
case 8: \
__GET_DW(*(type *)(dst), kernel_ld, \
(__force type *)(src)); \
break; \
default: \
__get_user_unknown(); \
break; \
} \
if (unlikely(__gu_err)) \
goto err_label; \
} while (0)
#ifndef CONFIG_EVA
#define __put_kernel_common(ptr, size) __put_user_common(ptr, size)
#else
/*
* Kernel specific functions for EVA. We need to use normal load instructions
* to read data from kernel when operating in EVA mode. We use these macros to
* avoid redefining __get_data_asm for EVA.
*/
#undef _stored
#undef _storew
#undef _storeh
#undef _storeb
#ifdef CONFIG_32BIT
#define _stored _storew
#else
#define _stored(reg, addr) "ld " reg ", " addr
#endif
#define _storew(reg, addr) "sw " reg ", " addr
#define _storeh(reg, addr) "sh " reg ", " addr
#define _storeb(reg, addr) "sb " reg ", " addr
#define __put_kernel_common(ptr, size) \
do { \
switch (size) { \
case 1: __put_data_asm(_storeb, ptr); break; \
case 2: __put_data_asm(_storeh, ptr); break; \
case 4: __put_data_asm(_storew, ptr); break; \
case 8: __PUT_DW(_stored, ptr); break; \
default: __put_user_unknown(); break; \
} \
} while(0)
#endif
/*
* Yuck. We need two variants, one for 64bit operation and one
* for 32 bit mode and old iron.
@ -429,12 +332,9 @@ do { \
int __pu_err = 0; \
\
__pu_val = (x); \
if (eva_kernel_access()) { \
__put_kernel_common(ptr, size); \
} else { \
__chk_user_ptr(ptr); \
__put_user_common(ptr, size); \
} \
__chk_user_ptr(ptr); \
__put_user_common(ptr, size); \
\
__pu_err; \
})
@ -445,11 +345,8 @@ do { \
int __pu_err = -EFAULT; \
\
might_fault(); \
if (likely(access_ok( __pu_addr, size))) { \
if (eva_kernel_access()) \
__put_kernel_common(__pu_addr, size); \
else \
__put_user_common(__pu_addr, size); \
if (likely(access_ok(__pu_addr, size))) { \
__put_user_common(__pu_addr, size); \
} \
\
__pu_err; \
@ -501,7 +398,23 @@ do { \
int __pu_err = 0; \
\
__pu_val = *(__force type *)(src); \
__put_kernel_common(((type *)(dst)), sizeof(type)); \
switch (sizeof(type)) { \
case 1: \
__put_data_asm(kernel_sb, (type *)(dst)); \
break; \
case 2: \
__put_data_asm(kernel_sh, (type *)(dst)); \
break; \
case 4: \
__put_data_asm(kernel_sw, (type *)(dst)) \
break; \
case 8: \
__PUT_DW(kernel_sd, (type *)(dst)); \
break; \
default: \
__put_user_unknown(); \
break; \
} \
if (unlikely(__pu_err)) \
goto err_label; \
} while (0)
@ -529,124 +442,85 @@ do { \
#define DADDI_SCRATCH "$0"
#endif
extern size_t __copy_user(void *__to, const void *__from, size_t __n);
#define __invoke_copy_from(func, to, from, n) \
({ \
register void *__cu_to_r __asm__("$4"); \
register const void __user *__cu_from_r __asm__("$5"); \
register long __cu_len_r __asm__("$6"); \
\
__cu_to_r = (to); \
__cu_from_r = (from); \
__cu_len_r = (n); \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
__MODULE_JAL(func) \
".set\tnoat\n\t" \
__UA_ADDU "\t$1, %1, %2\n\t" \
".set\tat\n\t" \
".set\treorder" \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
#define __invoke_copy_to(func, to, from, n) \
({ \
register void __user *__cu_to_r __asm__("$4"); \
register const void *__cu_from_r __asm__("$5"); \
register long __cu_len_r __asm__("$6"); \
\
__cu_to_r = (to); \
__cu_from_r = (from); \
__cu_len_r = (n); \
__asm__ __volatile__( \
__MODULE_JAL(func) \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
#define __invoke_copy_from_kernel(to, from, n) \
__invoke_copy_from(__copy_user, to, from, n)
#define __invoke_copy_to_kernel(to, from, n) \
__invoke_copy_to(__copy_user, to, from, n)
#define ___invoke_copy_in_kernel(to, from, n) \
__invoke_copy_from(__copy_user, to, from, n)
#ifndef CONFIG_EVA
#define __invoke_copy_from_user(to, from, n) \
__invoke_copy_from(__copy_user, to, from, n)
#define __invoke_copy_to_user(to, from, n) \
__invoke_copy_to(__copy_user, to, from, n)
#define ___invoke_copy_in_user(to, from, n) \
__invoke_copy_from(__copy_user, to, from, n)
#else
/* EVA specific functions */
extern size_t __copy_from_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_to_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
/*
* Source or destination address is in userland. We need to go through
* the TLB
*/
#define __invoke_copy_from_user(to, from, n) \
__invoke_copy_from(__copy_from_user_eva, to, from, n)
#define __invoke_copy_to_user(to, from, n) \
__invoke_copy_to(__copy_to_user_eva, to, from, n)
#define ___invoke_copy_in_user(to, from, n) \
__invoke_copy_from(__copy_in_user_eva, to, from, n)
#endif /* CONFIG_EVA */
static inline unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
if (eva_kernel_access())
return __invoke_copy_to_kernel(to, from, n);
else
return __invoke_copy_to_user(to, from, n);
}
extern size_t __raw_copy_from_user(void *__to, const void *__from, size_t __n);
extern size_t __raw_copy_to_user(void *__to, const void *__from, size_t __n);
extern size_t __raw_copy_in_user(void *__to, const void *__from, size_t __n);
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (eva_kernel_access())
return __invoke_copy_from_kernel(to, from, n);
else
return __invoke_copy_from_user(to, from, n);
register void *__cu_to_r __asm__("$4");
register const void __user *__cu_from_r __asm__("$5");
register long __cu_len_r __asm__("$6");
__cu_to_r = to;
__cu_from_r = from;
__cu_len_r = n;
__asm__ __volatile__(
".set\tnoreorder\n\t"
__MODULE_JAL(__raw_copy_from_user)
".set\tnoat\n\t"
__UA_ADDU "\t$1, %1, %2\n\t"
".set\tat\n\t"
".set\treorder"
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)
:
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31",
DADDI_SCRATCH, "memory");
return __cu_len_r;
}
static inline unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
register void __user *__cu_to_r __asm__("$4");
register const void *__cu_from_r __asm__("$5");
register long __cu_len_r __asm__("$6");
__cu_to_r = (to);
__cu_from_r = (from);
__cu_len_r = (n);
__asm__ __volatile__(
__MODULE_JAL(__raw_copy_to_user)
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)
:
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31",
DADDI_SCRATCH, "memory");
return __cu_len_r;
}
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
static inline unsigned long
raw_copy_in_user(void __user*to, const void __user *from, unsigned long n)
raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
if (eva_kernel_access())
return ___invoke_copy_in_kernel(to, from, n);
else
return ___invoke_copy_in_user(to, from, n);
register void __user *__cu_to_r __asm__("$4");
register const void __user *__cu_from_r __asm__("$5");
register long __cu_len_r __asm__("$6");
__cu_to_r = to;
__cu_from_r = from;
__cu_len_r = n;
__asm__ __volatile__(
".set\tnoreorder\n\t"
__MODULE_JAL(__raw_copy_in_user)
".set\tnoat\n\t"
__UA_ADDU "\t$1, %1, %2\n\t"
".set\tat\n\t"
".set\treorder"
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)
:
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31",
DADDI_SCRATCH, "memory");
return __cu_len_r;
}
extern __kernel_size_t __bzero_kernel(void __user *addr, __kernel_size_t size);
extern __kernel_size_t __bzero(void __user *addr, __kernel_size_t size);
/*
@ -672,28 +546,16 @@ __clear_user(void __user *addr, __kernel_size_t size)
#define bzero_clobbers "$4", "$5", "$6", __UA_t0, __UA_t1, "$31"
#endif /* CONFIG_CPU_MICROMIPS */
if (eva_kernel_access()) {
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, $0\n\t"
"move\t$6, %2\n\t"
__MODULE_JAL(__bzero_kernel)
"move\t%0, $6"
: "=r" (res)
: "r" (addr), "r" (size)
: bzero_clobbers);
} else {
might_fault();
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, $0\n\t"
"move\t$6, %2\n\t"
__MODULE_JAL(__bzero)
"move\t%0, $6"
: "=r" (res)
: "r" (addr), "r" (size)
: bzero_clobbers);
}
might_fault();
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, $0\n\t"
"move\t$6, %2\n\t"
__MODULE_JAL(__bzero)
"move\t%0, $6"
: "=r" (res)
: "r" (addr), "r" (size)
: bzero_clobbers);
return res;
}
@ -707,7 +569,6 @@ __clear_user(void __user *addr, __kernel_size_t size)
__cl_size; \
})
extern long __strncpy_from_kernel_asm(char *__to, const char __user *__from, long __len);
extern long __strncpy_from_user_asm(char *__to, const char __user *__from, long __len);
/*
@ -733,33 +594,23 @@ strncpy_from_user(char *__to, const char __user *__from, long __len)
{
long res;
if (eva_kernel_access()) {
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
"move\t$6, %3\n\t"
__MODULE_JAL(__strncpy_from_kernel_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (__to), "r" (__from), "r" (__len)
: "$2", "$3", "$4", "$5", "$6", __UA_t0, "$31", "memory");
} else {
might_fault();
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
"move\t$6, %3\n\t"
__MODULE_JAL(__strncpy_from_user_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (__to), "r" (__from), "r" (__len)
: "$2", "$3", "$4", "$5", "$6", __UA_t0, "$31", "memory");
}
if (!access_ok(__from, __len))
return -EFAULT;
might_fault();
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
"move\t$6, %3\n\t"
__MODULE_JAL(__strncpy_from_user_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (__to), "r" (__from), "r" (__len)
: "$2", "$3", "$4", "$5", "$6", __UA_t0, "$31", "memory");
return res;
}
extern long __strnlen_kernel_asm(const char __user *s, long n);
extern long __strnlen_user_asm(const char __user *s, long n);
/*
@ -779,26 +630,18 @@ static inline long strnlen_user(const char __user *s, long n)
{
long res;
if (!access_ok(s, n))
return -0;
might_fault();
if (eva_kernel_access()) {
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
__MODULE_JAL(__strnlen_kernel_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (s), "r" (n)
: "$2", "$4", "$5", __UA_t0, "$31");
} else {
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
__MODULE_JAL(__strnlen_user_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (s), "r" (n)
: "$2", "$4", "$5", __UA_t0, "$31");
}
__asm__ __volatile__(
"move\t$4, %1\n\t"
"move\t$5, %2\n\t"
__MODULE_JAL(__strnlen_user_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (s), "r" (n)
: "$2", "$4", "$5", __UA_t0, "$31");
return res;
}

1
arch/mips/kernel/asm-offsets.c
View File

@ -98,7 +98,6 @@ void output_thread_info_defines(void)
OFFSET(TI_TP_VALUE, thread_info, tp_value);
OFFSET(TI_CPU, thread_info, cpu);
OFFSET(TI_PRE_COUNT, thread_info, preempt_count);
OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit);
OFFSET(TI_REGS, thread_info, regs);
DEFINE(_THREAD_SIZE, THREAD_SIZE);
DEFINE(_THREAD_MASK, THREAD_MASK);

2
arch/mips/kernel/process.c
View File

@ -124,7 +124,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
/* kernel thread */
unsigned long status = p->thread.cp0_status;
memset(childregs, 0, sizeof(struct pt_regs));
ti->addr_limit = KERNEL_DS;
p->thread.reg16 = usp; /* fn */
p->thread.reg17 = kthread_arg;
p->thread.reg29 = childksp;
@ -145,7 +144,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs->regs[2] = 0; /* Child gets zero as return value */
if (usp)
childregs->regs[29] = usp;
ti->addr_limit = USER_DS;
p->thread.reg29 = (unsigned long) childregs;
p->thread.reg31 = (unsigned long) ret_from_fork;

4
arch/mips/kernel/scall32-o32.S
View File

@ -48,10 +48,8 @@ NESTED(handle_sys, PT_SIZE, sp)
* We intentionally keep the kernel stack a little below the top of
* userspace so we don't have to do a slower byte accurate check here.
*/
lw t5, TI_ADDR_LIMIT($28)
addu t4, t0, 32
and t5, t4
bltz t5, bad_stack # -> sp is bad
bltz t4, bad_stack # -> sp is bad
/*
* Ok, copy the args from the luser stack to the kernel stack.

28
arch/mips/lib/memcpy.S
View File

@ -661,8 +661,14 @@ LEAF(memcpy) /* a0=dst a1=src a2=len */
EXPORT_SYMBOL(memcpy)
move v0, dst /* return value */
.L__memcpy:
FEXPORT(__copy_user)
EXPORT_SYMBOL(__copy_user)
#ifndef CONFIG_EVA
FEXPORT(__raw_copy_from_user)
EXPORT_SYMBOL(__raw_copy_from_user)
FEXPORT(__raw_copy_to_user)
EXPORT_SYMBOL(__raw_copy_to_user)
FEXPORT(__raw_copy_in_user)
EXPORT_SYMBOL(__raw_copy_in_user)
#endif
/* Legacy Mode, user <-> user */
__BUILD_COPY_USER LEGACY_MODE USEROP USEROP
@ -681,10 +687,10 @@ EXPORT_SYMBOL(__copy_user)
* __copy_from_user (EVA)
*/
LEAF(__copy_from_user_eva)
EXPORT_SYMBOL(__copy_from_user_eva)
LEAF(__raw_copy_from_user)
EXPORT_SYMBOL(__raw_copy_from_user)
__BUILD_COPY_USER EVA_MODE USEROP KERNELOP
END(__copy_from_user_eva)
END(__raw_copy_from_user)
@ -692,18 +698,18 @@ END(__copy_from_user_eva)
* __copy_to_user (EVA)
*/
LEAF(__copy_to_user_eva)
EXPORT_SYMBOL(__copy_to_user_eva)
LEAF(__raw_copy_to_user)
EXPORT_SYMBOL(__raw_copy_to_user)
__BUILD_COPY_USER EVA_MODE KERNELOP USEROP
END(__copy_to_user_eva)
END(__raw_copy_to_user)
/*
* __copy_in_user (EVA)
*/
LEAF(__copy_in_user_eva)
EXPORT_SYMBOL(__copy_in_user_eva)
LEAF(__raw_copy_in_user)
EXPORT_SYMBOL(__raw_copy_in_user)
__BUILD_COPY_USER EVA_MODE USEROP USEROP
END(__copy_in_user_eva)
END(__raw_copy_in_user)
#endif

3
arch/mips/lib/memset.S
View File

@ -314,9 +314,6 @@ EXPORT_SYMBOL(memset)
#ifndef CONFIG_EVA
FEXPORT(__bzero)
EXPORT_SYMBOL(__bzero)
#else
FEXPORT(__bzero_kernel)
EXPORT_SYMBOL(__bzero_kernel)
#endif
__BUILD_BZERO LEGACY_MODE

48
arch/mips/lib/strncpy_user.S
View File

@ -29,19 +29,17 @@
* it happens at most some bytes of the exceptions handlers will be copied.
*/
.macro __BUILD_STRNCPY_ASM func
LEAF(__strncpy_from_\func\()_asm)
LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
and v0, a1
bnez v0, .Lfault\@
LEAF(__strncpy_from_user_asm)
move t0, zero
move v1, a1
.ifeqs "\func","kernel"
1: EX(lbu, v0, (v1), .Lfault\@)
.else
1: EX(lbue, v0, (v1), .Lfault\@)
.endif
#ifdef CONFIG_EVA
.set push
.set eva
1: EX(lbue, v0, (v1), .Lfault)
.set pop
#else
1: EX(lbu, v0, (v1), .Lfault)
#endif
PTR_ADDIU v1, 1
R10KCBARRIER(0(ra))
sb v0, (a0)
@ -51,35 +49,17 @@ LEAF(__strncpy_from_\func\()_asm)
bne t0, a2, 1b
2: PTR_ADDU v0, a1, t0
xor v0, a1
bltz v0, .Lfault\@
bltz v0, .Lfault
move v0, t0
jr ra # return n
END(__strncpy_from_\func\()_asm)
END(__strncpy_from_user_asm)
.Lfault\@:
.Lfault:
li v0, -EFAULT
jr ra
.section __ex_table,"a"
PTR 1b, .Lfault\@
PTR 1b, .Lfault
.previous
.endm
#ifndef CONFIG_EVA
/* Set aliases */
.global __strncpy_from_user_asm
.set __strncpy_from_user_asm, __strncpy_from_kernel_asm
EXPORT_SYMBOL(__strncpy_from_user_asm)
#endif
__BUILD_STRNCPY_ASM kernel
EXPORT_SYMBOL(__strncpy_from_kernel_asm)
#ifdef CONFIG_EVA
.set push
.set eva
__BUILD_STRNCPY_ASM user
.set pop
EXPORT_SYMBOL(__strncpy_from_user_asm)
#endif
EXPORT_SYMBOL(__strncpy_from_user_asm)

44
arch/mips/lib/strnlen_user.S
View File

@ -26,12 +26,7 @@
* bytes. There's nothing secret there. On 64-bit accessing beyond
* the maximum is a tad hairier ...
*/
.macro __BUILD_STRNLEN_ASM func
LEAF(__strnlen_\func\()_asm)
LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
and v0, a0
bnez v0, .Lfault\@
LEAF(__strnlen_user_asm)
move v0, a0
PTR_ADDU a1, a0 # stop pointer
1:
@ -40,11 +35,14 @@ LEAF(__strnlen_\func\()_asm)
li AT, 1
#endif
beq v0, a1, 1f # limit reached?
.ifeqs "\func", "kernel"
EX(lb, t0, (v0), .Lfault\@)
.else
EX(lbe, t0, (v0), .Lfault\@)
.endif
#ifdef CONFIG_EVA
.set push
.set eva
EX(lbe, t0, (v0), .Lfault)
.set pop
#else
EX(lb, t0, (v0), .Lfault)
#endif
.set noreorder
bnez t0, 1b
1:
@ -57,28 +55,10 @@ LEAF(__strnlen_\func\()_asm)
.set reorder
PTR_SUBU v0, a0
jr ra
END(__strnlen_\func\()_asm)
END(__strnlen_user_asm)
.Lfault\@:
.Lfault:
move v0, zero
jr ra
.endm
#ifndef CONFIG_EVA
/* Set aliases */
.global __strnlen_user_asm
.set __strnlen_user_asm, __strnlen_kernel_asm
EXPORT_SYMBOL(__strnlen_user_asm)
#endif
__BUILD_STRNLEN_ASM kernel
EXPORT_SYMBOL(__strnlen_kernel_asm)
#ifdef CONFIG_EVA
.set push
.set eva
__BUILD_STRNLEN_ASM user
.set pop
EXPORT_SYMBOL(__strnlen_user_asm)
#endif
EXPORT_SYMBOL(__strnlen_user_asm)