[PATCH 24/24] ARM: kprobes: Remove now unused code
Nicolas Pitre
nico at fluxnic.net
Wed Jul 13 12:04:12 EDT 2011
On Wed, 13 Jul 2011, Tixy wrote:
> From: Jon Medhurst <tixy at yxit.co.uk>
>
> Signed-off-by: Jon Medhurst <tixy at yxit.co.uk>
> ---
> arch/arm/kernel/kprobes-arm.c | 738 -----------------------------------------
> 1 files changed, 0 insertions(+), 738 deletions(-)
I certainly like this one.
Acked-by: Nicolas Pitre <nicolas.pitre at linaro.org>
This is also valid for the whole series. Again, this is excellent work.
>
> diff --git a/arch/arm/kernel/kprobes-arm.c b/arch/arm/kernel/kprobes-arm.c
> index 8a58c99..79203ee 100644
> --- a/arch/arm/kernel/kprobes-arm.c
> +++ b/arch/arm/kernel/kprobes-arm.c
> @@ -74,300 +74,6 @@
> "mov pc, "reg" \n\t"
> #endif
>
> -#define is_r15(insn, bitpos) (((insn) & (0xf << bitpos)) == (0xf << bitpos))
> -
> -#define PSR_fs (PSR_f|PSR_s)
> -
> -#define KPROBE_RETURN_INSTRUCTION 0xe1a0f00e /* mov pc, lr */
> -
> -typedef long (insn_0arg_fn_t)(void);
> -typedef long (insn_1arg_fn_t)(long);
> -typedef long (insn_2arg_fn_t)(long, long);
> -typedef long (insn_3arg_fn_t)(long, long, long);
> -typedef long (insn_4arg_fn_t)(long, long, long, long);
> -typedef long long (insn_llret_0arg_fn_t)(void);
> -typedef long long (insn_llret_3arg_fn_t)(long, long, long);
> -typedef long long (insn_llret_4arg_fn_t)(long, long, long, long);
> -
> -union reg_pair {
> - long long dr;
> -#ifdef __LITTLE_ENDIAN
> - struct { long r0, r1; };
> -#else
> - struct { long r1, r0; };
> -#endif
> -};
> -
> -/*
> - * The insnslot_?arg_r[w]flags() functions below are to keep the
> - * msr -> *fn -> mrs instruction sequences indivisible so that
> - * the state of the CPSR flags aren't inadvertently modified
> - * just before or just after the call.
> - */
> -
> -static inline long __kprobes
> -insnslot_0arg_rflags(long cpsr, insn_0arg_fn_t *fn)
> -{
> - register long ret asm("r0");
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret)
> - : [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - return ret;
> -}
> -
> -static inline long long __kprobes
> -insnslot_llret_0arg_rflags(long cpsr, insn_llret_0arg_fn_t *fn)
> -{
> - register long ret0 asm("r0");
> - register long ret1 asm("r1");
> - union reg_pair fnr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret0), "=r" (ret1)
> - : [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - fnr.r0 = ret0;
> - fnr.r1 = ret1;
> - return fnr.dr;
> -}
> -
> -static inline long __kprobes
> -insnslot_1arg_rflags(long r0, long cpsr, insn_1arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long ret asm("r0");
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret)
> - : "0" (rr0), [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_2arg_rflags(long r0, long r1, long cpsr, insn_2arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long ret asm("r0");
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret)
> - : "0" (rr0), "r" (rr1),
> - [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_3arg_rflags(long r0, long r1, long r2, long cpsr, insn_3arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long ret asm("r0");
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret)
> - : "0" (rr0), "r" (rr1), "r" (rr2),
> - [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - return ret;
> -}
> -
> -static inline long long __kprobes
> -insnslot_llret_3arg_rflags(long r0, long r1, long r2, long cpsr,
> - insn_llret_3arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long ret0 asm("r0");
> - register long ret1 asm("r1");
> - union reg_pair fnr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret0), "=r" (ret1)
> - : "0" (rr0), "r" (rr1), "r" (rr2),
> - [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - fnr.r0 = ret0;
> - fnr.r1 = ret1;
> - return fnr.dr;
> -}
> -
> -static inline long __kprobes
> -insnslot_4arg_rflags(long r0, long r1, long r2, long r3, long cpsr,
> - insn_4arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long rr3 asm("r3") = r3;
> - register long ret asm("r0");
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[cpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - : "=r" (ret)
> - : "0" (rr0), "r" (rr1), "r" (rr2), "r" (rr3),
> - [cpsr] "r" (cpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_1arg_rwflags(long r0, long *cpsr, insn_1arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long ret asm("r0");
> - long oldcpsr = *cpsr;
> - long newcpsr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[oldcpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - "mrs %[newcpsr], cpsr \n\t"
> - : "=r" (ret), [newcpsr] "=r" (newcpsr)
> - : "0" (rr0), [oldcpsr] "r" (oldcpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - *cpsr = (oldcpsr & ~PSR_fs) | (newcpsr & PSR_fs);
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_2arg_rwflags(long r0, long r1, long *cpsr, insn_2arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long ret asm("r0");
> - long oldcpsr = *cpsr;
> - long newcpsr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[oldcpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - "mrs %[newcpsr], cpsr \n\t"
> - : "=r" (ret), [newcpsr] "=r" (newcpsr)
> - : "0" (rr0), "r" (rr1), [oldcpsr] "r" (oldcpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - *cpsr = (oldcpsr & ~PSR_fs) | (newcpsr & PSR_fs);
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_3arg_rwflags(long r0, long r1, long r2, long *cpsr,
> - insn_3arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long ret asm("r0");
> - long oldcpsr = *cpsr;
> - long newcpsr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[oldcpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - "mrs %[newcpsr], cpsr \n\t"
> - : "=r" (ret), [newcpsr] "=r" (newcpsr)
> - : "0" (rr0), "r" (rr1), "r" (rr2),
> - [oldcpsr] "r" (oldcpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - *cpsr = (oldcpsr & ~PSR_fs) | (newcpsr & PSR_fs);
> - return ret;
> -}
> -
> -static inline long __kprobes
> -insnslot_4arg_rwflags(long r0, long r1, long r2, long r3, long *cpsr,
> - insn_4arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long rr3 asm("r3") = r3;
> - register long ret asm("r0");
> - long oldcpsr = *cpsr;
> - long newcpsr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[oldcpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - "mrs %[newcpsr], cpsr \n\t"
> - : "=r" (ret), [newcpsr] "=r" (newcpsr)
> - : "0" (rr0), "r" (rr1), "r" (rr2), "r" (rr3),
> - [oldcpsr] "r" (oldcpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - *cpsr = (oldcpsr & ~PSR_fs) | (newcpsr & PSR_fs);
> - return ret;
> -}
> -
> -static inline long long __kprobes
> -insnslot_llret_4arg_rwflags(long r0, long r1, long r2, long r3, long *cpsr,
> - insn_llret_4arg_fn_t *fn)
> -{
> - register long rr0 asm("r0") = r0;
> - register long rr1 asm("r1") = r1;
> - register long rr2 asm("r2") = r2;
> - register long rr3 asm("r3") = r3;
> - register long ret0 asm("r0");
> - register long ret1 asm("r1");
> - long oldcpsr = *cpsr;
> - long newcpsr;
> - union reg_pair fnr;
> -
> - __asm__ __volatile__ (
> - "msr cpsr_fs, %[oldcpsr] \n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[fn] \n\t"
> - "mrs %[newcpsr], cpsr \n\t"
> - : "=r" (ret0), "=r" (ret1), [newcpsr] "=r" (newcpsr)
> - : "0" (rr0), "r" (rr1), "r" (rr2), "r" (rr3),
> - [oldcpsr] "r" (oldcpsr), [fn] "r" (fn)
> - : "lr", "cc"
> - );
> - *cpsr = (oldcpsr & ~PSR_fs) | (newcpsr & PSR_fs);
> - fnr.r0 = ret0;
> - fnr.r1 = ret1;
> - return fnr.dr;
> -}
> -
> /*
> * To avoid the complications of mimicing single-stepping on a
> * processor without a Next-PC or a single-step mode, and to
> @@ -449,450 +155,6 @@ static void __kprobes simulate_mov_ipsp(struct kprobe *p, struct pt_regs *regs)
> regs->uregs[12] = regs->uregs[13];
> }
>
> -static void __kprobes emulate_ldrd(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_2arg_fn_t *i_fn = (insn_2arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf; /* rm may be invalid, don't care. */
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> -
> - /* Not following the C calling convention here, so need asm(). */
> - __asm__ __volatile__ (
> - "ldr r0, %[rn] \n\t"
> - "ldr r1, %[rm] \n\t"
> - "msr cpsr_fs, %[cpsr]\n\t"
> - "mov lr, pc \n\t"
> - "mov pc, %[i_fn] \n\t"
> - "str r0, %[rn] \n\t" /* in case of writeback */
> - "str r2, %[rd0] \n\t"
> - "str r3, %[rd1] \n\t"
> - : [rn] "+m" (rnv),
> - [rd0] "=m" (regs->uregs[rd]),
> - [rd1] "=m" (regs->uregs[rd+1])
> - : [rm] "m" (rmv),
> - [cpsr] "r" (regs->ARM_cpsr),
> - [i_fn] "r" (i_fn)
> - : "r0", "r1", "r2", "r3", "lr", "cc"
> - );
> - if (is_writeback(insn))
> - regs->uregs[rn] = rnv;
> -}
> -
> -static void __kprobes emulate_strd(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_4arg_fn_t *i_fn = (insn_4arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf;
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> - /* rm/rmv may be invalid, don't care. */
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long rnv_wb;
> -
> - rnv_wb = insnslot_4arg_rflags(rnv, rmv, regs->uregs[rd],
> - regs->uregs[rd+1],
> - regs->ARM_cpsr, i_fn);
> - if (is_writeback(insn))
> - regs->uregs[rn] = rnv_wb;
> -}
> -
> -static void __kprobes emulate_ldr_old(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_llret_3arg_fn_t *i_fn = (insn_llret_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - union reg_pair fnr;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf;
> - long rdv;
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long cpsr = regs->ARM_cpsr;
> -
> - fnr.dr = insnslot_llret_3arg_rflags(rnv, 0, rmv, cpsr, i_fn);
> - if (rn != 15)
> - regs->uregs[rn] = fnr.r0; /* Save Rn in case of writeback. */
> - rdv = fnr.r1;
> -
> - if (rd == 15) {
> -#if __LINUX_ARM_ARCH__ >= 5
> - cpsr &= ~PSR_T_BIT;
> - if (rdv & 0x1)
> - cpsr |= PSR_T_BIT;
> - regs->ARM_cpsr = cpsr;
> - rdv &= ~0x1;
> -#else
> - rdv &= ~0x2;
> -#endif
> - }
> - regs->uregs[rd] = rdv;
> -}
> -
> -static void __kprobes emulate_str_old(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_3arg_fn_t *i_fn = (insn_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long iaddr = (long)p->addr;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf;
> - long rdv = (rd == 15) ? iaddr + str_pc_offset : regs->uregs[rd];
> - long rnv = (rn == 15) ? iaddr + 8 : regs->uregs[rn];
> - long rmv = regs->uregs[rm]; /* rm/rmv may be invalid, don't care. */
> - long rnv_wb;
> -
> - rnv_wb = insnslot_3arg_rflags(rnv, rdv, rmv, regs->ARM_cpsr, i_fn);
> - if (rn != 15)
> - regs->uregs[rn] = rnv_wb; /* Save Rn in case of writeback. */
> -}
> -
> -static void __kprobes emulate_sat(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rm = insn & 0xf;
> - long rmv = regs->uregs[rm];
> -
> - /* Writes Q flag */
> - regs->uregs[rd] = insnslot_1arg_rwflags(rmv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes emulate_sel(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_2arg_fn_t *i_fn = (insn_2arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf;
> - long rnv = regs->uregs[rn];
> - long rmv = regs->uregs[rm];
> -
> - /* Reads GE bits */
> - regs->uregs[rd] = insnslot_2arg_rflags(rnv, rmv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes emulate_none(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_0arg_fn_t *i_fn = (insn_0arg_fn_t *)&p->ainsn.insn[0];
> -
> - insnslot_0arg_rflags(regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes emulate_nop(struct kprobe *p, struct pt_regs *regs)
> -{
> -}
> -
> -static void __kprobes
> -emulate_rd12_modify(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - long rdv = regs->uregs[rd];
> -
> - regs->uregs[rd] = insnslot_1arg_rflags(rdv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_rd12rn0_modify(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_2arg_fn_t *i_fn = (insn_2arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rn = insn & 0xf;
> - long rdv = regs->uregs[rd];
> - long rnv = regs->uregs[rn];
> -
> - regs->uregs[rd] = insnslot_2arg_rflags(rdv, rnv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes emulate_rd12rm0(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rm = insn & 0xf;
> - long rmv = regs->uregs[rm];
> -
> - regs->uregs[rd] = insnslot_1arg_rflags(rmv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_rd12rn16rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_2arg_fn_t *i_fn = (insn_2arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - int rm = insn & 0xf;
> - long rnv = regs->uregs[rn];
> - long rmv = regs->uregs[rm];
> -
> - regs->uregs[rd] =
> - insnslot_2arg_rwflags(rnv, rmv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_rd16rn12rs8rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_3arg_fn_t *i_fn = (insn_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 16) & 0xf;
> - int rn = (insn >> 12) & 0xf;
> - int rs = (insn >> 8) & 0xf;
> - int rm = insn & 0xf;
> - long rnv = regs->uregs[rn];
> - long rsv = regs->uregs[rs];
> - long rmv = regs->uregs[rm];
> -
> - regs->uregs[rd] =
> - insnslot_3arg_rwflags(rnv, rsv, rmv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_rd16rs8rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_2arg_fn_t *i_fn = (insn_2arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 16) & 0xf;
> - int rs = (insn >> 8) & 0xf;
> - int rm = insn & 0xf;
> - long rsv = regs->uregs[rs];
> - long rmv = regs->uregs[rm];
> -
> - regs->uregs[rd] =
> - insnslot_2arg_rwflags(rsv, rmv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_rdhi16rdlo12rs8rm0_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_llret_4arg_fn_t *i_fn = (insn_llret_4arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - union reg_pair fnr;
> - int rdhi = (insn >> 16) & 0xf;
> - int rdlo = (insn >> 12) & 0xf;
> - int rs = (insn >> 8) & 0xf;
> - int rm = insn & 0xf;
> - long rsv = regs->uregs[rs];
> - long rmv = regs->uregs[rm];
> -
> - fnr.dr = insnslot_llret_4arg_rwflags(regs->uregs[rdhi],
> - regs->uregs[rdlo], rsv, rmv,
> - ®s->ARM_cpsr, i_fn);
> - regs->uregs[rdhi] = fnr.r0;
> - regs->uregs[rdlo] = fnr.r1;
> -}
> -
> -static void __kprobes
> -emulate_alu_imm_rflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - long rnv = (rn == 15) ? (long)p->addr + 8 : regs->uregs[rn];
> -
> - regs->uregs[rd] = insnslot_1arg_rflags(rnv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_alu_imm_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf;
> - long rnv = (rn == 15) ? (long)p->addr + 8 : regs->uregs[rn];
> -
> - regs->uregs[rd] = insnslot_1arg_rwflags(rnv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_alu_tests_imm(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_1arg_fn_t *i_fn = (insn_1arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - int rn = (insn >> 16) & 0xf;
> - long rnv = (rn == 15) ? (long)p->addr + 8 : regs->uregs[rn];
> -
> - insnslot_1arg_rwflags(rnv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_alu_rflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_3arg_fn_t *i_fn = (insn_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf; /* rn/rnv/rs/rsv may be */
> - int rs = (insn >> 8) & 0xf; /* invalid, don't care. */
> - int rm = insn & 0xf;
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long rsv = regs->uregs[rs];
> -
> - regs->uregs[rd] =
> - insnslot_3arg_rflags(rnv, rmv, rsv, regs->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_alu_rwflags(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_3arg_fn_t *i_fn = (insn_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - int rd = (insn >> 12) & 0xf;
> - int rn = (insn >> 16) & 0xf; /* rn/rnv/rs/rsv may be */
> - int rs = (insn >> 8) & 0xf; /* invalid, don't care. */
> - int rm = insn & 0xf;
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long rsv = regs->uregs[rs];
> -
> - regs->uregs[rd] =
> - insnslot_3arg_rwflags(rnv, rmv, rsv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static void __kprobes
> -emulate_alu_tests(struct kprobe *p, struct pt_regs *regs)
> -{
> - insn_3arg_fn_t *i_fn = (insn_3arg_fn_t *)&p->ainsn.insn[0];
> - kprobe_opcode_t insn = p->opcode;
> - long ppc = (long)p->addr + 8;
> - int rn = (insn >> 16) & 0xf;
> - int rs = (insn >> 8) & 0xf; /* rs/rsv may be invalid, don't care. */
> - int rm = insn & 0xf;
> - long rnv = (rn == 15) ? ppc : regs->uregs[rn];
> - long rmv = (rm == 15) ? ppc : regs->uregs[rm];
> - long rsv = regs->uregs[rs];
> -
> - insnslot_3arg_rwflags(rnv, rmv, rsv, ®s->ARM_cpsr, i_fn);
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_ldr_str(kprobe_opcode_t insn, struct arch_specific_insn *asi)
> -{
> - int not_imm = (insn & (1 << 26)) ? (insn & (1 << 25))
> - : (~insn & (1 << 22));
> -
> - if (is_writeback(insn) && is_r15(insn, 16))
> - return INSN_REJECTED; /* Writeback to PC */
> -
> - insn &= 0xfff00fff;
> - insn |= 0x00001000; /* Rn = r0, Rd = r1 */
> - if (not_imm) {
> - insn &= ~0xf;
> - insn |= 2; /* Rm = r2 */
> - }
> - asi->insn[0] = insn;
> - asi->insn_handler = (insn & (1 << 20)) ? emulate_ldr_old : emulate_str_old;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd12_modify(kprobe_opcode_t insn, struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 12))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xffff0fff; /* Rd = r0 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd12_modify;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd12rn0_modify(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 12))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xffff0ff0; /* Rd = r0 */
> - insn |= 0x00000001; /* Rn = r1 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd12rn0_modify;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd12rm0(kprobe_opcode_t insn, struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 12))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xffff0ff0; /* Rd = r0, Rm = r0 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd12rm0;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd12rn16rm0_wflags(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 12))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xfff00ff0; /* Rd = r0, Rn = r0 */
> - insn |= 0x00000001; /* Rm = r1 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd12rn16rm0_rwflags;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd16rs8rm0_wflags(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 16))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xfff0f0f0; /* Rd = r0, Rs = r0 */
> - insn |= 0x00000001; /* Rm = r1 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd16rs8rm0_rwflags;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rd16rn12rs8rm0_wflags(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 16))
> - return INSN_REJECTED; /* Rd is PC */
> -
> - insn &= 0xfff000f0; /* Rd = r0, Rn = r0 */
> - insn |= 0x00000102; /* Rs = r1, Rm = r2 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rd16rn12rs8rm0_rwflags;
> - return INSN_GOOD;
> -}
> -
> -static enum kprobe_insn __kprobes
> -prep_emulate_rdhi16rdlo12rs8rm0_wflags(kprobe_opcode_t insn,
> - struct arch_specific_insn *asi)
> -{
> - if (is_r15(insn, 16) || is_r15(insn, 12))
> - return INSN_REJECTED; /* RdHi or RdLo is PC */
> -
> - insn &= 0xfff000f0; /* RdHi = r0, RdLo = r1 */
> - insn |= 0x00001203; /* Rs = r2, Rm = r3 */
> - asi->insn[0] = insn;
> - asi->insn_handler = emulate_rdhi16rdlo12rs8rm0_rwflags;
> - return INSN_GOOD;
> -}
> -
> static void __kprobes
> emulate_ldrdstrd(struct kprobe *p, struct pt_regs *regs)
> {
> --
> 1.7.2.5
>
>
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