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Diffstat (limited to 'arch/sh/kernel/traps_32.c')
-rw-r--r--arch/sh/kernel/traps_32.c95
1 files changed, 46 insertions, 49 deletions
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 511a9426cec..b359b08a8e3 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -26,6 +26,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/fpu.h>
+#include <asm/kprobes.h>
#ifdef CONFIG_SH_KGDB
#include <asm/kgdb.h>
@@ -192,6 +193,7 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
int ret, index, count;
unsigned long *rm, *rn;
unsigned char *src, *dst;
+ unsigned char __user *srcu, *dstu;
index = (instruction>>8)&15; /* 0x0F00 */
rn = &regs->regs[index];
@@ -206,28 +208,28 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
case 0: /* mov.[bwl] to/from memory via r0+rn */
if (instruction & 8) {
/* from memory */
- src = (unsigned char*) *rm;
- src += regs->regs[0];
- dst = (unsigned char*) rn;
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += regs->regs[0];
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
#if !defined(__LITTLE_ENDIAN__)
dst += 4-count;
#endif
- if (ma->from(dst, src, count))
+ if (ma->from(dst, srcu, count))
goto fetch_fault;
sign_extend(count, dst);
} else {
/* to memory */
- src = (unsigned char*) rm;
+ src = (unsigned char *)rm;
#if !defined(__LITTLE_ENDIAN__)
src += 4-count;
#endif
- dst = (unsigned char*) *rn;
- dst += regs->regs[0];
+ dstu = (unsigned char __user *)*rn;
+ dstu += regs->regs[0];
- if (ma->to(dst, src, count))
+ if (ma->to(dstu, src, count))
goto fetch_fault;
}
ret = 0;
@@ -235,10 +237,10 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
case 1: /* mov.l Rm,@(disp,Rn) */
src = (unsigned char*) rm;
- dst = (unsigned char*) *rn;
- dst += (instruction&0x000F)<<2;
+ dstu = (unsigned char __user *)*rn;
+ dstu += (instruction&0x000F)<<2;
- if (ma->to(dst, src, 4))
+ if (ma->to(dstu, src, 4))
goto fetch_fault;
ret = 0;
break;
@@ -247,28 +249,28 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
if (instruction & 4)
*rn -= count;
src = (unsigned char*) rm;
- dst = (unsigned char*) *rn;
+ dstu = (unsigned char __user *)*rn;
#if !defined(__LITTLE_ENDIAN__)
src += 4-count;
#endif
- if (ma->to(dst, src, count))
+ if (ma->to(dstu, src, count))
goto fetch_fault;
ret = 0;
break;
case 5: /* mov.l @(disp,Rm),Rn */
- src = (unsigned char*) *rm;
- src += (instruction&0x000F)<<2;
- dst = (unsigned char*) rn;
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += (instruction & 0x000F) << 2;
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
- if (ma->from(dst, src, 4))
+ if (ma->from(dst, srcu, 4))
goto fetch_fault;
ret = 0;
break;
case 6: /* mov.[bwl] from memory, possibly with post-increment */
- src = (unsigned char*) *rm;
+ srcu = (unsigned char __user *)*rm;
if (instruction & 4)
*rm += count;
dst = (unsigned char*) rn;
@@ -277,7 +279,7 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
#if !defined(__LITTLE_ENDIAN__)
dst += 4-count;
#endif
- if (ma->from(dst, src, count))
+ if (ma->from(dst, srcu, count))
goto fetch_fault;
sign_extend(count, dst);
ret = 0;
@@ -286,28 +288,28 @@ static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs,
case 8:
switch ((instruction&0xFF00)>>8) {
case 0x81: /* mov.w R0,@(disp,Rn) */
- src = (unsigned char*) &regs->regs[0];
+ src = (unsigned char *) &regs->regs[0];
#if !defined(__LITTLE_ENDIAN__)
src += 2;
#endif
- dst = (unsigned char*) *rm; /* called Rn in the spec */
- dst += (instruction&0x000F)<<1;
+ dstu = (unsigned char __user *)*rm; /* called Rn in the spec */
+ dstu += (instruction & 0x000F) << 1;
- if (ma->to(dst, src, 2))
+ if (ma->to(dstu, src, 2))
goto fetch_fault;
ret = 0;
break;
case 0x85: /* mov.w @(disp,Rm),R0 */
- src = (unsigned char*) *rm;
- src += (instruction&0x000F)<<1;
- dst = (unsigned char*) &regs->regs[0];
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += (instruction & 0x000F) << 1;
+ dst = (unsigned char *) &regs->regs[0];
+ *(unsigned long *)dst = 0;
#if !defined(__LITTLE_ENDIAN__)
dst += 2;
#endif
- if (ma->from(dst, src, 2))
+ if (ma->from(dst, srcu, 2))
goto fetch_fault;
sign_extend(2, dst);
ret = 0;
@@ -333,7 +335,8 @@ static inline int handle_delayslot(struct pt_regs *regs,
struct mem_access *ma)
{
opcode_t instruction;
- void *addr = (void *)(regs->pc + instruction_size(old_instruction));
+ void __user *addr = (void __user *)(regs->pc +
+ instruction_size(old_instruction));
if (copy_from_user(&instruction, addr, sizeof(instruction))) {
/* the instruction-fetch faulted */
@@ -511,14 +514,6 @@ int handle_unaligned_access(opcode_t instruction, struct pt_regs *regs,
return ret;
}
-#ifdef CONFIG_CPU_HAS_SR_RB
-#define lookup_exception_vector(x) \
- __asm__ __volatile__ ("stc r2_bank, %0\n\t" : "=r" ((x)))
-#else
-#define lookup_exception_vector(x) \
- __asm__ __volatile__ ("mov r4, %0\n\t" : "=r" ((x)))
-#endif
-
/*
* Handle various address error exceptions:
* - instruction address error:
@@ -542,7 +537,7 @@ asmlinkage void do_address_error(struct pt_regs *regs,
/* Intentional ifdef */
#ifdef CONFIG_CPU_HAS_SR_RB
- lookup_exception_vector(error_code);
+ error_code = lookup_exception_vector();
#endif
oldfs = get_fs();
@@ -559,7 +554,7 @@ asmlinkage void do_address_error(struct pt_regs *regs,
}
set_fs(USER_DS);
- if (copy_from_user(&instruction, (void *)(regs->pc),
+ if (copy_from_user(&instruction, (void __user *)(regs->pc),
sizeof(instruction))) {
/* Argh. Fault on the instruction itself.
This should never happen non-SMP
@@ -589,7 +584,7 @@ uspace_segv:
die("unaligned program counter", regs, error_code);
set_fs(KERNEL_DS);
- if (copy_from_user(&instruction, (void *)(regs->pc),
+ if (copy_from_user(&instruction, (void __user *)(regs->pc),
sizeof(instruction))) {
/* Argh. Fault on the instruction itself.
This should never happen non-SMP
@@ -683,7 +678,7 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
}
#endif
- lookup_exception_vector(error_code);
+ error_code = lookup_exception_vector();
local_irq_enable();
CHK_REMOTE_DEBUG(regs);
@@ -739,11 +734,13 @@ asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
struct pt_regs __regs)
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- unsigned long error_code;
+ unsigned long inst;
struct task_struct *tsk = current;
-#ifdef CONFIG_SH_FPU_EMU
- unsigned short inst = 0;
+ if (kprobe_handle_illslot(regs->pc) == 0)
+ return;
+
+#ifdef CONFIG_SH_FPU_EMU
get_user(inst, (unsigned short *)regs->pc + 1);
if (!do_fpu_inst(inst, regs)) {
get_user(inst, (unsigned short *)regs->pc);
@@ -754,12 +751,12 @@ asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
/* not a FPU inst. */
#endif
- lookup_exception_vector(error_code);
+ inst = lookup_exception_vector();
local_irq_enable();
CHK_REMOTE_DEBUG(regs);
force_sig(SIGILL, tsk);
- die_if_no_fixup("illegal slot instruction", regs, error_code);
+ die_if_no_fixup("illegal slot instruction", regs, inst);
}
asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
@@ -769,7 +766,7 @@ asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
long ex;
- lookup_exception_vector(ex);
+ ex = lookup_exception_vector();
die_if_kernel("exception", regs, ex);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 23:34:08 +0000