Re: [PATCH v4 07/16] ARM: Remove use of struct kprobe from genericprobes code

From: Jon Medhurst (Tixy)
Date: Fri Dec 20 2013 - 08:58:54 EST

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On Sun, 2013-12-15 at 23:08 -0500, David Long wrote:
> From: "David A. Long" <dave.long@xxxxxxxxxx>
>
> Change the generic ARM probes code to pass in the opcode and architecture-specific
> structure separately instead of using struct kprobe, so we do not pollute
> code being used only for uprobes or other non-kprobes instruction
> interpretation.
>
> Signed-off-by: David A. Long <dave.long@xxxxxxxxxx>
> ---
> arch/arm/include/asm/probes.h | 9 +-
> arch/arm/kernel/kprobes-arm.c | 77 ++++++-------
> arch/arm/kernel/kprobes-common.c | 42 ++++---
> arch/arm/kernel/kprobes-thumb.c | 239 +++++++++++++++++++--------------------
> arch/arm/kernel/kprobes.c | 2 +-
> arch/arm/kernel/kprobes.h | 2 +-
> arch/arm/kernel/probes-arm.c | 33 +++---
> arch/arm/kernel/probes-arm.h | 29 ++---
> arch/arm/kernel/probes-thumb.c | 18 ++-
> arch/arm/kernel/probes-thumb.h | 51 ---------
> arch/arm/kernel/probes.c | 14 ++-
> arch/arm/kernel/probes.h | 8 +-
> 12 files changed, 246 insertions(+), 278 deletions(-)

Looks OK to me, though it looks like this patch includes some header
file cleanups that should have been part of the previous patch? I.e. all
the changes to probes-thumb.h and probes-arm.h. And also the
re-application of 'static' to functions in kprobes-thumb.c and
kprobes-arm.c.

I'm not sure it's worth the hassle of trying to unpick those changes
though, it doesn't impact the end result or bisect-bility.

--
Tixy

> diff --git a/arch/arm/include/asm/probes.h b/arch/arm/include/asm/probes.h
> index edf5abe..a7b0a79 100644
> --- a/arch/arm/include/asm/probes.h
> +++ b/arch/arm/include/asm/probes.h
> @@ -3,9 +3,14 @@
>
> struct kprobe;
>
> -typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
> +struct arch_specific_insn;
> +typedef void (kprobe_insn_handler_t)(kprobe_opcode_t,
> + struct arch_specific_insn *,
> + struct pt_regs *);
> typedef unsigned long (kprobe_check_cc)(unsigned long);
> -typedef void (kprobe_insn_singlestep_t)(struct kprobe *, struct pt_regs *);
> +typedef void (kprobe_insn_singlestep_t)(kprobe_opcode_t,
> + struct arch_specific_insn *,
> + struct pt_regs *);
> typedef void (kprobe_insn_fn_t)(void);
>
> /* Architecture specific copy of original instruction. */
> diff --git a/arch/arm/kernel/kprobes-arm.c b/arch/arm/kernel/kprobes-arm.c
> index ee329ff..394b611 100644
> --- a/arch/arm/kernel/kprobes-arm.c
> +++ b/arch/arm/kernel/kprobes-arm.c
> @@ -72,12 +72,11 @@
> "mov pc, "reg" \n\t"
> #endif
>
> -
> -void __kprobes
> -emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_ldrdstrd(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = (unsigned long)p->addr + 8;
> + unsigned long pc = regs->ARM_pc + 4;
> int rt = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -92,7 +91,7 @@ emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> BLX("%[fn]")
> : "=r" (rtv), "=r" (rt2v), "=r" (rnv)
> : "0" (rtv), "1" (rt2v), "2" (rnv), "r" (rmv),
> - [fn] "r" (p->ainsn.insn_fn)
> + [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -102,11 +101,11 @@ emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[rn] = rnv;
> }
>
> -void __kprobes
> -emulate_ldr(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_ldr(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = (unsigned long)p->addr + 8;
> + unsigned long pc = regs->ARM_pc + 4;
> int rt = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -119,7 +118,7 @@ emulate_ldr(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> BLX("%[fn]")
> : "=r" (rtv), "=r" (rnv)
> - : "1" (rnv), "r" (rmv), [fn] "r" (p->ainsn.insn_fn)
> + : "1" (rnv), "r" (rmv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -132,12 +131,12 @@ emulate_ldr(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[rn] = rnv;
> }
>
> -void __kprobes
> -emulate_str(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_str(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long rtpc = (unsigned long)p->addr + str_pc_offset;
> - unsigned long rnpc = (unsigned long)p->addr + 8;
> + unsigned long rtpc = regs->ARM_pc - 4 + str_pc_offset;
> + unsigned long rnpc = regs->ARM_pc + 4;
> int rt = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -151,7 +150,7 @@ emulate_str(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> BLX("%[fn]")
> : "=r" (rnv)
> - : "r" (rtv), "0" (rnv), "r" (rmv), [fn] "r" (p->ainsn.insn_fn)
> + : "r" (rtv), "0" (rnv), "r" (rmv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -159,11 +158,11 @@ emulate_str(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[rn] = rnv;
> }
>
> -void __kprobes
> -emulate_rd12rn16rm0rs8_rwflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_rd12rn16rm0rs8_rwflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = (unsigned long)p->addr + 8;
> + unsigned long pc = regs->ARM_pc + 4;
> int rd = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -183,7 +182,7 @@ emulate_rd12rn16rm0rs8_rwflags(struct kprobe *p, struct pt_regs *regs)
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdv), [cpsr] "=r" (cpsr)
> : "0" (rdv), "r" (rnv), "r" (rmv), "r" (rsv),
> - "1" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + "1" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -194,10 +193,10 @@ emulate_rd12rn16rm0rs8_rwflags(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = (regs->ARM_cpsr & ~APSR_MASK) | (cpsr & APSR_MASK);
> }
>
> -void __kprobes
> -emulate_rd12rn16rm0_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_rd12rn16rm0_rwflags_nopc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -213,7 +212,7 @@ emulate_rd12rn16rm0_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdv), [cpsr] "=r" (cpsr)
> : "0" (rdv), "r" (rnv), "r" (rmv),
> - "1" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + "1" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -221,10 +220,11 @@ emulate_rd12rn16rm0_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = (regs->ARM_cpsr & ~APSR_MASK) | (cpsr & APSR_MASK);
> }
>
> -void __kprobes
> -emulate_rd16rn12rm0rs8_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_rd16rn12rm0rs8_rwflags_nopc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 16) & 0xf;
> int rn = (insn >> 12) & 0xf;
> int rm = insn & 0xf;
> @@ -242,7 +242,7 @@ emulate_rd16rn12rm0rs8_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdv), [cpsr] "=r" (cpsr)
> : "0" (rdv), "r" (rnv), "r" (rmv), "r" (rsv),
> - "1" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + "1" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -250,10 +250,10 @@ emulate_rd16rn12rm0rs8_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = (regs->ARM_cpsr & ~APSR_MASK) | (cpsr & APSR_MASK);
> }
>
> -void __kprobes
> -emulate_rd12rm0_noflags_nopc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_rd12rm0_noflags_nopc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 12) & 0xf;
> int rm = insn & 0xf;
>
> @@ -263,17 +263,18 @@ emulate_rd12rm0_noflags_nopc(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> BLX("%[fn]")
> : "=r" (rdv)
> - : "0" (rdv), "r" (rmv), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rdv), "r" (rmv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> regs->uregs[rd] = rdv;
> }
>
> -void __kprobes
> -emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rdlo = (insn >> 12) & 0xf;
> int rdhi = (insn >> 16) & 0xf;
> int rn = insn & 0xf;
> @@ -291,7 +292,7 @@ emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(struct kprobe *p, struct pt_regs *regs)
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdlov), "=r" (rdhiv), [cpsr] "=r" (cpsr)
> : "0" (rdlov), "1" (rdhiv), "r" (rnv), "r" (rmv),
> - "2" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + "2" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> diff --git a/arch/arm/kernel/kprobes-common.c b/arch/arm/kernel/kprobes-common.c
> index 554720c..45590a4 100644
> --- a/arch/arm/kernel/kprobes-common.c
> +++ b/arch/arm/kernel/kprobes-common.c
> @@ -18,9 +18,10 @@
> #include "kprobes.h"
>
>
> -static void __kprobes simulate_ldm1stm1(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes simulate_ldm1stm1(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rn = (insn >> 16) & 0xf;
> int lbit = insn & (1 << 20);
> int wbit = insn & (1 << 21);
> @@ -59,24 +60,31 @@ static void __kprobes simulate_ldm1stm1(struct kprobe *p, struct pt_regs *regs)
> }
> }
>
> -static void __kprobes simulate_stm1_pc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes simulate_stm1_pc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - regs->ARM_pc = (long)p->addr + str_pc_offset;
> - simulate_ldm1stm1(p, regs);
> - regs->ARM_pc = (long)p->addr + 4;
> + unsigned long addr = regs->ARM_pc - 4;
> +
> + regs->ARM_pc = (long)addr + str_pc_offset;
> + simulate_ldm1stm1(insn, asi, regs);
> + regs->ARM_pc = (long)addr + 4;
> }
>
> -static void __kprobes simulate_ldm1_pc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes simulate_ldm1_pc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - simulate_ldm1stm1(p, regs);
> + simulate_ldm1stm1(insn, asi, regs);
> load_write_pc(regs->ARM_pc, regs);
> }
>
> static void __kprobes
> -emulate_generic_r0_12_noflags(struct kprobe *p, struct pt_regs *regs)
> +emulate_generic_r0_12_noflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> register void *rregs asm("r1") = regs;
> - register void *rfn asm("lr") = p->ainsn.insn_fn;
> + register void *rfn asm("lr") = asi->insn_fn;
>
> __asm__ __volatile__ (
> "stmdb sp!, {%[regs], r11} \n\t"
> @@ -100,21 +108,25 @@ emulate_generic_r0_12_noflags(struct kprobe *p, struct pt_regs *regs)
> }
>
> static void __kprobes
> -emulate_generic_r2_14_noflags(struct kprobe *p, struct pt_regs *regs)
> +emulate_generic_r2_14_noflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - emulate_generic_r0_12_noflags(p, (struct pt_regs *)(regs->uregs+2));
> + emulate_generic_r0_12_noflags(insn, asi,
> + (struct pt_regs *)(regs->uregs+2));
> }
>
> static void __kprobes
> -emulate_ldm_r3_15(struct kprobe *p, struct pt_regs *regs)
> +emulate_ldm_r3_15(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - emulate_generic_r0_12_noflags(p, (struct pt_regs *)(regs->uregs+3));
> + emulate_generic_r0_12_noflags(insn, asi,
> + (struct pt_regs *)(regs->uregs+3));
> load_write_pc(regs->ARM_pc, regs);
> }
>
> enum kprobe_insn __kprobes
> kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> - struct decode_header *h)
> + struct decode_header *h)
> {
> kprobe_insn_handler_t *handler = 0;
> unsigned reglist = insn & 0xffff;
> diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c
> index 5990866..d0bbbf7 100644
> --- a/arch/arm/kernel/kprobes-thumb.c
> +++ b/arch/arm/kernel/kprobes-thumb.c
> @@ -19,24 +19,13 @@
> #define t32_emulate_rd8rn16rm0ra12_noflags \
> t32_emulate_rdlo12rdhi8rn16rm0_noflags
>
> -/*
> - * Return the PC value for a probe in thumb code.
> - * This is the address of the probed instruction plus 4.
> - * We subtract one because the address will have bit zero set to indicate
> - * a pointer to thumb code.
> - */
> -static inline unsigned long __kprobes thumb_probe_pc(struct kprobe *p)
> -{
> - return (unsigned long)p->addr - 1 + 4;
> -}
> -
> /* t32 thumb actions */
>
> -void __kprobes
> -t32_simulate_table_branch(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_simulate_table_branch(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
>
> @@ -52,20 +41,20 @@ t32_simulate_table_branch(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_pc = pc + 2 * halfwords;
> }
>
> -void __kprobes
> -t32_simulate_mrs(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_simulate_mrs(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 8) & 0xf;
> unsigned long mask = 0xf8ff03df; /* Mask out execution state */
> regs->uregs[rd] = regs->ARM_cpsr & mask;
> }
>
> -void __kprobes
> -t32_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_simulate_cond_branch(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc;
>
> long offset = insn & 0x7ff; /* imm11 */
> offset += (insn & 0x003f0000) >> 5; /* imm6 */
> @@ -76,7 +65,7 @@ t32_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_pc = pc + (offset * 2);
> }
>
> -enum kprobe_insn __kprobes
> +static enum kprobe_insn __kprobes
> t32_decode_cond_branch(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> struct decode_header *d)
> {
> @@ -86,11 +75,11 @@ t32_decode_cond_branch(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return INSN_GOOD_NO_SLOT;
> }
>
> -void __kprobes
> -t32_simulate_branch(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_simulate_branch(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc;
>
> long offset = insn & 0x7ff; /* imm11 */
> offset += (insn & 0x03ff0000) >> 5; /* imm10 */
> @@ -103,7 +92,7 @@ t32_simulate_branch(struct kprobe *p, struct pt_regs *regs)
>
> if (insn & (1 << 14)) {
> /* BL or BLX */
> - regs->ARM_lr = (unsigned long)p->addr + 4;
> + regs->ARM_lr = regs->ARM_pc | 1;
> if (!(insn & (1 << 12))) {
> /* BLX so switch to ARM mode */
> regs->ARM_cpsr &= ~PSR_T_BIT;
> @@ -114,11 +103,11 @@ t32_simulate_branch(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_pc = pc + (offset * 2);
> }
>
> -void __kprobes
> -t32_simulate_ldr_literal(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_simulate_ldr_literal(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long addr = thumb_probe_pc(p) & ~3;
> + unsigned long addr = regs->ARM_pc & ~3;
> int rt = (insn >> 12) & 0xf;
> unsigned long rtv;
>
> @@ -166,11 +155,11 @@ t32_decode_ldmstm(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return ret;
> }
>
> -void __kprobes
> -t32_emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_ldrdstrd(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p) & ~3;
> + unsigned long pc = regs->ARM_pc & ~3;
> int rt1 = (insn >> 12) & 0xf;
> int rt2 = (insn >> 8) & 0xf;
> int rn = (insn >> 16) & 0xf;
> @@ -183,7 +172,7 @@ t32_emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> "blx %[fn]"
> : "=r" (rt1v), "=r" (rt2v), "=r" (rnv)
> - : "0" (rt1v), "1" (rt2v), "2" (rnv), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rt1v), "1" (rt2v), "2" (rnv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -193,10 +182,10 @@ t32_emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[rt2] = rt2v;
> }
>
> -void __kprobes
> -t32_emulate_ldrstr(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_ldrstr(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rt = (insn >> 12) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -208,7 +197,7 @@ t32_emulate_ldrstr(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> "blx %[fn]"
> : "=r" (rtv), "=r" (rnv)
> - : "0" (rtv), "1" (rnv), "r" (rmv), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rtv), "1" (rnv), "r" (rmv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -219,10 +208,10 @@ t32_emulate_ldrstr(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[rt] = rtv;
> }
>
> -void __kprobes
> -t32_emulate_rd8rn16rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_rd8rn16rm0_rwflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 8) & 0xf;
> int rn = (insn >> 16) & 0xf;
> int rm = insn & 0xf;
> @@ -238,7 +227,7 @@ t32_emulate_rd8rn16rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdv), [cpsr] "=r" (cpsr)
> : "0" (rdv), "r" (rnv), "r" (rmv),
> - "1" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + "1" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -246,11 +235,11 @@ t32_emulate_rd8rn16rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = (regs->ARM_cpsr & ~APSR_MASK) | (cpsr & APSR_MASK);
> }
>
> -void __kprobes
> -t32_emulate_rd8pc16_noflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_rd8pc16_noflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc;
> int rd = (insn >> 8) & 0xf;
>
> register unsigned long rdv asm("r1") = regs->uregs[rd];
> @@ -259,17 +248,17 @@ t32_emulate_rd8pc16_noflags(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> "blx %[fn]"
> : "=r" (rdv)
> - : "0" (rdv), "r" (rnv), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rdv), "r" (rnv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> regs->uregs[rd] = rdv;
> }
>
> -void __kprobes
> -t32_emulate_rd8rn16_noflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_rd8rn16_noflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 8) & 0xf;
> int rn = (insn >> 16) & 0xf;
>
> @@ -279,17 +268,18 @@ t32_emulate_rd8rn16_noflags(struct kprobe *p, struct pt_regs *regs)
> __asm__ __volatile__ (
> "blx %[fn]"
> : "=r" (rdv)
> - : "0" (rdv), "r" (rnv), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rdv), "r" (rnv), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> regs->uregs[rd] = rdv;
> }
>
> -void __kprobes
> -t32_emulate_rdlo12rdhi8rn16rm0_noflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t32_emulate_rdlo12rdhi8rn16rm0_noflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rdlo = (insn >> 12) & 0xf;
> int rdhi = (insn >> 8) & 0xf;
> int rn = (insn >> 16) & 0xf;
> @@ -304,7 +294,7 @@ t32_emulate_rdlo12rdhi8rn16rm0_noflags(struct kprobe *p, struct pt_regs *regs)
> "blx %[fn]"
> : "=r" (rdlov), "=r" (rdhiv)
> : "0" (rdlov), "1" (rdhiv), "r" (rnv), "r" (rmv),
> - [fn] "r" (p->ainsn.insn_fn)
> + [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -313,34 +303,34 @@ t32_emulate_rdlo12rdhi8rn16rm0_noflags(struct kprobe *p, struct pt_regs *regs)
> }
> /* t16 thumb actions */
>
> -void __kprobes
> -t16_simulate_bxblx(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_bxblx(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc + 2;
> int rm = (insn >> 3) & 0xf;
> unsigned long rmv = (rm == 15) ? pc : regs->uregs[rm];
>
> if (insn & (1 << 7)) /* BLX ? */
> - regs->ARM_lr = (unsigned long)p->addr + 2;
> + regs->ARM_lr = regs->ARM_pc | 1;
>
> bx_write_pc(rmv, regs);
> }
>
> -void __kprobes
> -t16_simulate_ldr_literal(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_ldr_literal(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long* base = (unsigned long *)(thumb_probe_pc(p) & ~3);
> + unsigned long *base = (unsigned long *)((regs->ARM_pc + 2) & ~3);
> long index = insn & 0xff;
> int rt = (insn >> 8) & 0x7;
> regs->uregs[rt] = base[index];
> }
>
> -void __kprobes
> -t16_simulate_ldrstr_sp_relative(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_ldrstr_sp_relative(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> unsigned long* base = (unsigned long *)regs->ARM_sp;
> long index = insn & 0xff;
> int rt = (insn >> 8) & 0x7;
> @@ -350,21 +340,21 @@ t16_simulate_ldrstr_sp_relative(struct kprobe *p, struct pt_regs *regs)
> base[index] = regs->uregs[rt];
> }
>
> -void __kprobes
> -t16_simulate_reladr(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_reladr(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> unsigned long base = (insn & 0x800) ? regs->ARM_sp
> - : (thumb_probe_pc(p) & ~3);
> + : ((regs->ARM_pc + 2) & ~3);
> long offset = insn & 0xff;
> int rt = (insn >> 8) & 0x7;
> regs->uregs[rt] = base + offset * 4;
> }
>
> -void __kprobes
> -t16_simulate_add_sp_imm(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_add_sp_imm(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> long imm = insn & 0x7f;
> if (insn & 0x80) /* SUB */
> regs->ARM_sp -= imm * 4;
> @@ -372,22 +362,23 @@ t16_simulate_add_sp_imm(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_sp += imm * 4;
> }
>
> -void __kprobes
> -t16_simulate_cbz(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_cbz(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rn = insn & 0x7;
> kprobe_opcode_t nonzero = regs->uregs[rn] ? insn : ~insn;
> if (nonzero & 0x800) {
> long i = insn & 0x200;
> long imm5 = insn & 0xf8;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc + 2;
> regs->ARM_pc = pc + (i >> 3) + (imm5 >> 2);
> }
> }
>
> -void __kprobes
> -t16_simulate_it(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_it(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> /*
> * The 8 IT state bits are split into two parts in CPSR:
> @@ -395,7 +386,6 @@ t16_simulate_it(struct kprobe *p, struct pt_regs *regs)
> * ITSTATE<7:2> are in CPSR<15:10>
> * The new IT state is in the lower byte of insn.
> */
> - kprobe_opcode_t insn = p->opcode;
> unsigned long cpsr = regs->ARM_cpsr;
> cpsr &= ~PSR_IT_MASK;
> cpsr |= (insn & 0xfc) << 8;
> @@ -403,14 +393,15 @@ t16_simulate_it(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = cpsr;
> }
>
> -void __kprobes
> -t16_singlestep_it(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_singlestep_it(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> regs->ARM_pc += 2;
> - t16_simulate_it(p, regs);
> + t16_simulate_it(insn, asi, regs);
> }
>
> -enum kprobe_insn __kprobes
> +static enum kprobe_insn __kprobes
> t16_decode_it(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> struct decode_header *d)
> {
> @@ -418,17 +409,17 @@ t16_decode_it(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return INSN_GOOD_NO_SLOT;
> }
>
> -void __kprobes
> -t16_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_cond_branch(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc + 2;
> long offset = insn & 0x7f;
> offset -= insn & 0x80; /* Apply sign bit */
> regs->ARM_pc = pc + (offset * 2);
> }
>
> -enum kprobe_insn __kprobes
> +static enum kprobe_insn __kprobes
> t16_decode_cond_branch(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> struct decode_header *d)
> {
> @@ -438,18 +429,19 @@ t16_decode_cond_branch(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return INSN_GOOD_NO_SLOT;
> }
>
> -void __kprobes
> -t16_simulate_branch(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_simulate_branch(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc + 2;
> long offset = insn & 0x3ff;
> offset -= insn & 0x400; /* Apply sign bit */
> regs->ARM_pc = pc + (offset * 2);
> }
>
> static unsigned long __kprobes
> -t16_emulate_loregs(struct kprobe *p, struct pt_regs *regs)
> +t16_emulate_loregs(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> unsigned long oldcpsr = regs->ARM_cpsr;
> unsigned long newcpsr;
> @@ -462,7 +454,7 @@ t16_emulate_loregs(struct kprobe *p, struct pt_regs *regs)
> "mrs %[newcpsr], cpsr \n\t"
> : [newcpsr] "=r" (newcpsr)
> : [oldcpsr] "r" (oldcpsr), [regs] "r" (regs),
> - [fn] "r" (p->ainsn.insn_fn)
> + [fn] "r" (asi->insn_fn)
> : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
> "lr", "memory", "cc"
> );
> @@ -470,25 +462,27 @@ t16_emulate_loregs(struct kprobe *p, struct pt_regs *regs)
> return (oldcpsr & ~APSR_MASK) | (newcpsr & APSR_MASK);
> }
>
> -void __kprobes
> -t16_emulate_loregs_rwflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_loregs_rwflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - regs->ARM_cpsr = t16_emulate_loregs(p, regs);
> + regs->ARM_cpsr = t16_emulate_loregs(insn, asi, regs);
> }
>
> -void __kprobes
> -t16_emulate_loregs_noitrwflags(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_loregs_noitrwflags(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - unsigned long cpsr = t16_emulate_loregs(p, regs);
> + unsigned long cpsr = t16_emulate_loregs(insn, asi, regs);
> if (!in_it_block(cpsr))
> regs->ARM_cpsr = cpsr;
> }
>
> -void __kprobes
> -t16_emulate_hiregs(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_hiregs(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - unsigned long pc = thumb_probe_pc(p);
> + unsigned long pc = regs->ARM_pc + 2;
> int rdn = (insn & 0x7) | ((insn & 0x80) >> 4);
> int rm = (insn >> 3) & 0xf;
>
> @@ -504,7 +498,7 @@ t16_emulate_hiregs(struct kprobe *p, struct pt_regs *regs)
> "blx %[fn] \n\t"
> "mrs %[cpsr], cpsr \n\t"
> : "=r" (rdnv), [cpsr] "=r" (cpsr)
> - : "0" (rdnv), "r" (rmv), "1" (cpsr), [fn] "r" (p->ainsn.insn_fn)
> + : "0" (rdnv), "r" (rmv), "1" (cpsr), [fn] "r" (asi->insn_fn)
> : "lr", "memory", "cc"
> );
>
> @@ -515,7 +509,7 @@ t16_emulate_hiregs(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr = (regs->ARM_cpsr & ~APSR_MASK) | (cpsr & APSR_MASK);
> }
>
> -enum kprobe_insn __kprobes
> +static enum kprobe_insn __kprobes
> t16_decode_hiregs(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> struct decode_header *d)
> {
> @@ -526,8 +520,9 @@ t16_decode_hiregs(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return INSN_GOOD;
> }
>
> -void __kprobes
> -t16_emulate_push(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_push(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> __asm__ __volatile__ (
> "ldr r9, [%[regs], #13*4] \n\t"
> @@ -536,13 +531,13 @@ t16_emulate_push(struct kprobe *p, struct pt_regs *regs)
> "blx %[fn] \n\t"
> "str r9, [%[regs], #13*4] \n\t"
> :
> - : [regs] "r" (regs), [fn] "r" (p->ainsn.insn_fn)
> + : [regs] "r" (regs), [fn] "r" (asi->insn_fn)
> : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9",
> "lr", "memory", "cc"
> );
> }
>
> -enum kprobe_insn __kprobes
> +static enum kprobe_insn __kprobes
> t16_decode_push(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> struct decode_header *d)
> {
> @@ -557,8 +552,9 @@ t16_decode_push(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> return INSN_GOOD;
> }
>
> -void __kprobes
> -t16_emulate_pop_nopc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_pop_nopc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> __asm__ __volatile__ (
> "ldr r9, [%[regs], #13*4] \n\t"
> @@ -567,14 +563,15 @@ t16_emulate_pop_nopc(struct kprobe *p, struct pt_regs *regs)
> "stmia %[regs], {r0-r7} \n\t"
> "str r9, [%[regs], #13*4] \n\t"
> :
> - : [regs] "r" (regs), [fn] "r" (p->ainsn.insn_fn)
> + : [regs] "r" (regs), [fn] "r" (asi->insn_fn)
> : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r9",
> "lr", "memory", "cc"
> );
> }
>
> -void __kprobes
> -t16_emulate_pop_pc(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes
> +t16_emulate_pop_pc(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> register unsigned long pc asm("r8");
>
> @@ -585,7 +582,7 @@ t16_emulate_pop_pc(struct kprobe *p, struct pt_regs *regs)
> "stmia %[regs], {r0-r7} \n\t"
> "str r9, [%[regs], #13*4] \n\t"
> : "=r" (pc)
> - : [regs] "r" (regs), [fn] "r" (p->ainsn.insn_fn)
> + : [regs] "r" (regs), [fn] "r" (asi->insn_fn)
> : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r9",
> "lr", "memory", "cc"
> );
> diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
> index a18b4ca..19c55aa 100644
> --- a/arch/arm/kernel/kprobes.c
> +++ b/arch/arm/kernel/kprobes.c
> @@ -203,7 +203,7 @@ singlestep_skip(struct kprobe *p, struct pt_regs *regs)
> static inline void __kprobes
> singlestep(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb)
> {
> - p->ainsn.insn_singlestep(p, regs);
> + p->ainsn.insn_singlestep(p->opcode, &p->ainsn, regs);
> }
>
> /*
> diff --git a/arch/arm/kernel/kprobes.h b/arch/arm/kernel/kprobes.h
> index 5ce81dc..6c1ed3c 100644
> --- a/arch/arm/kernel/kprobes.h
> +++ b/arch/arm/kernel/kprobes.h
> @@ -37,7 +37,7 @@ enum kprobe_insn {
>
> typedef enum kprobe_insn (kprobe_decode_insn_t)(kprobe_opcode_t,
> struct arch_specific_insn *,
> - struct decode_header *actions);
> + struct decode_header *);
>
> #ifdef CONFIG_THUMB2_KERNEL
>
> diff --git a/arch/arm/kernel/probes-arm.c b/arch/arm/kernel/probes-arm.c
> index 665cd0d..3aba9c3 100644
> --- a/arch/arm/kernel/probes-arm.c
> +++ b/arch/arm/kernel/probes-arm.c
> @@ -18,8 +18,7 @@
> #include <linux/compiler.h>
> #include <linux/kernel.h>
>
> -#include <linux/kprobes.h>
> -#include "kprobes.h"
> +#include "probes.h"
> #include "probes-arm.h"
>
> #define sign_extend(x, signbit) ((x) | (0 - ((x) & (1 << (signbit)))))
> @@ -56,10 +55,10 @@
> * read and write of flags.
> */
>
> -void __kprobes simulate_bbl(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes simulate_bbl(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - long iaddr = (long)p->addr;
> + long iaddr = (long) regs->ARM_pc - 4;
> int disp = branch_displacement(insn);
>
> if (insn & (1 << 24))
> @@ -68,10 +67,10 @@ void __kprobes simulate_bbl(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_pc = iaddr + 8 + disp;
> }
>
> -void __kprobes simulate_blx1(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes simulate_blx1(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> - long iaddr = (long)p->addr;
> + long iaddr = (long) regs->ARM_pc - 4;
> int disp = branch_displacement(insn);
>
> regs->ARM_lr = iaddr + 4;
> @@ -79,14 +78,14 @@ void __kprobes simulate_blx1(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr |= PSR_T_BIT;
> }
>
> -void __kprobes simulate_blx2bx(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes simulate_blx2bx(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rm = insn & 0xf;
> long rmv = regs->uregs[rm];
>
> if (insn & (1 << 5))
> - regs->ARM_lr = (long)p->addr + 4;
> + regs->ARM_lr = (long) regs->ARM_pc;
>
> regs->ARM_pc = rmv & ~0x1;
> regs->ARM_cpsr &= ~PSR_T_BIT;
> @@ -94,15 +93,16 @@ void __kprobes simulate_blx2bx(struct kprobe *p, struct pt_regs *regs)
> regs->ARM_cpsr |= PSR_T_BIT;
> }
>
> -void __kprobes simulate_mrs(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes simulate_mrs(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> - kprobe_opcode_t insn = p->opcode;
> int rd = (insn >> 12) & 0xf;
> unsigned long mask = 0xf8ff03df; /* Mask out execution state */
> regs->uregs[rd] = regs->ARM_cpsr & mask;
> }
>
> -void __kprobes simulate_mov_ipsp(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes simulate_mov_ipsp(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> regs->uregs[12] = regs->uregs[13];
> }
> @@ -702,10 +702,11 @@ const union decode_item kprobe_decode_arm_table[] = {
> EXPORT_SYMBOL_GPL(kprobe_decode_arm_table);
> #endif
>
> -static void __kprobes arm_singlestep(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes arm_singlestep(kprobe_opcode_t insn,
> + struct arch_specific_insn *asi, struct pt_regs *regs)
> {
> regs->ARM_pc += 4;
> - p->ainsn.insn_handler(p, regs);
> + asi->insn_handler(insn, asi, regs);
> }
>
> /* Return:
> diff --git a/arch/arm/kernel/probes-arm.h b/arch/arm/kernel/probes-arm.h
> index f8e0f7a..2c9e841 100644
> --- a/arch/arm/kernel/probes-arm.h
> +++ b/arch/arm/kernel/probes-arm.h
> @@ -52,24 +52,15 @@ enum probes_arm_action {
> PROBES_LDMSTM
> };
>
> -void __kprobes simulate_bbl(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes simulate_blx1(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes simulate_blx2bx(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes simulate_mrs(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes simulate_mov_ipsp(struct kprobe *p, struct pt_regs *regs);
> -
> -void __kprobes emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes emulate_ldr(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes emulate_str(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes emulate_rd12rn16rm0rs8_rwflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes emulate_rd12rn16rm0_rwflags_nopc(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes emulate_rd16rn12rm0rs8_rwflags_nopc(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes emulate_rd12rm0_noflags_nopc(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(struct kprobe *p,
> - struct pt_regs *regs);
> +void __kprobes simulate_bbl(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi, struct pt_regs *regs);
> +void __kprobes simulate_blx1(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi, struct pt_regs *regs);
> +void __kprobes simulate_blx2bx(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi, struct pt_regs *regs);
> +void __kprobes simulate_mrs(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi, struct pt_regs *regs);
> +void __kprobes simulate_mov_ipsp(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi, struct pt_regs *regs);
>
> #endif
> diff --git a/arch/arm/kernel/probes-thumb.c b/arch/arm/kernel/probes-thumb.c
> index bf2f1e9..fb79dd9 100644
> --- a/arch/arm/kernel/probes-thumb.c
> +++ b/arch/arm/kernel/probes-thumb.c
> @@ -9,10 +9,9 @@
> */
>
> #include <linux/kernel.h>
> -#include <linux/kprobes.h>
> #include <linux/module.h>
>
> -#include "kprobes.h"
> +#include "probes.h"
> #include "probes-thumb.h"
>
>
> @@ -831,6 +830,9 @@ const union decode_item kprobe_decode_thumb16_table[] = {
>
> DECODE_END
> };
> +#ifdef CONFIG_ARM_KPROBES_TEST_MODULE
> +EXPORT_SYMBOL_GPL(kprobe_decode_thumb16_table);
> +#endif
>
> static unsigned long __kprobes thumb_check_cc(unsigned long cpsr)
> {
> @@ -839,17 +841,21 @@ static unsigned long __kprobes thumb_check_cc(unsigned long cpsr)
> return true;
> }
>
> -static void __kprobes thumb16_singlestep(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes thumb16_singlestep(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> regs->ARM_pc += 2;
> - p->ainsn.insn_handler(p, regs);
> + asi->insn_handler(opcode, asi, regs);
> regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
> }
>
> -static void __kprobes thumb32_singlestep(struct kprobe *p, struct pt_regs *regs)
> +static void __kprobes thumb32_singlestep(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> regs->ARM_pc += 4;
> - p->ainsn.insn_handler(p, regs);
> + asi->insn_handler(opcode, asi, regs);
> regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
> }
>
> diff --git a/arch/arm/kernel/probes-thumb.h b/arch/arm/kernel/probes-thumb.h
> index 381ad3a..f024a4c 100644
> --- a/arch/arm/kernel/probes-thumb.h
> +++ b/arch/arm/kernel/probes-thumb.h
> @@ -82,55 +82,4 @@ enum probes_t16_action {
> PROBES_T16_BRANCH
> };
>
> -void __kprobes t16_simulate_bxblx(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_simulate_ldr_literal(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_simulate_ldrstr_sp_relative(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t16_simulate_reladr(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_simulate_add_sp_imm(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_simulate_cbz(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_simulate_it(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_singlestep_it(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t16_decode_it(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t16_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t16_decode_cond_branch(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t16_simulate_branch(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_emulate_loregs_rwflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t16_emulate_loregs_noitrwflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t16_emulate_hiregs(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t16_decode_hiregs(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t16_emulate_push(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t16_decode_push(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t16_emulate_pop_nopc(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t16_emulate_pop_pc(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t16_decode_pop(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -
> -void __kprobes t32_simulate_table_branch(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t32_simulate_mrs(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t32_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t32_decode_cond_branch(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t32_simulate_branch(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t32_simulate_ldr_literal(struct kprobe *p, struct pt_regs *regs);
> -enum kprobe_insn __kprobes t32_decode_ldmstm(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi, struct decode_header *d);
> -void __kprobes t32_emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t32_emulate_ldrstr(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes t32_emulate_rd8rn16rm0_rwflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t32_emulate_rd8pc16_noflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t32_emulate_rd8rn16_noflags(struct kprobe *p,
> - struct pt_regs *regs);
> -void __kprobes t32_emulate_rdlo12rdhi8rn16rm0_noflags(struct kprobe *p,
> - struct pt_regs *regs);
> -
> #endif
> diff --git a/arch/arm/kernel/probes.c b/arch/arm/kernel/probes.c
> index 1bcf5da..b2db250 100644
> --- a/arch/arm/kernel/probes.c
> +++ b/arch/arm/kernel/probes.c
> @@ -12,11 +12,9 @@
> */
>
> #include <linux/kernel.h>
> -#include <linux/kprobes.h>
> #include <asm/system_info.h>
>
> -#include "kprobes.h"
> -
> +#include "probes.h"
>
> #ifndef find_str_pc_offset
>
> @@ -173,13 +171,17 @@ kprobe_check_cc * const kprobe_condition_checks[16] = {
> };
>
>
> -void __kprobes kprobe_simulate_nop(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes kprobe_simulate_nop(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> }
>
> -void __kprobes kprobe_emulate_none(struct kprobe *p, struct pt_regs *regs)
> +void __kprobes kprobe_emulate_none(kprobe_opcode_t opcode,
> + struct arch_specific_insn *asi,
> + struct pt_regs *regs)
> {
> - p->ainsn.insn_fn();
> + asi->insn_fn();
> }
>
> /*
> diff --git a/arch/arm/kernel/probes.h b/arch/arm/kernel/probes.h
> index 2238972..45151a1 100644
> --- a/arch/arm/kernel/probes.h
> +++ b/arch/arm/kernel/probes.h
> @@ -20,6 +20,7 @@
> #define _ARM_KERNEL_PROBES_H
>
> #include <linux/kprobes.h>
> +#include "kprobes.h"
>
> #if __LINUX_ARM_ARCH__ >= 7
>
> @@ -35,6 +36,7 @@ void __init find_str_pc_offset(void);
>
> #endif
>
> +struct decode_header;
>
> /*
> * Update ITSTATE after normal execution of an IT block instruction.
> @@ -127,8 +129,10 @@ static inline void __kprobes alu_write_pc(long pcv, struct pt_regs *regs)
> }
>
>
> -void __kprobes kprobe_simulate_nop(struct kprobe *p, struct pt_regs *regs);
> -void __kprobes kprobe_emulate_none(struct kprobe *p, struct pt_regs *regs);
> +void __kprobes kprobe_simulate_nop(kprobe_opcode_t, struct arch_specific_insn *,
> + struct pt_regs *regs);
> +void __kprobes kprobe_emulate_none(kprobe_opcode_t, struct arch_specific_insn *,
> + struct pt_regs *regs);
>
> enum kprobe_insn __kprobes
> kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_specific_insn *asi,

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