"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
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)
{
projects / platform / kernel / linux-arm64.git / commitdiff