ARM: kprobes: Decode 32-bit miscellaneous control instructions (b06f3ee3) · Commits · e / devices / android_kernel_teracube_2e

arch/arm/kernel/kprobes-thumb.c

+31 −0

Original line number	Diff line number	Diff line
		@@ -57,6 +57,15 @@ t32_simulate_table_branch(struct kprobe p, struct pt_regs regs)
		regs->ARM_pc = pc + 2 * halfwords;
		}

		static void __kprobes
		t32_simulate_mrs(struct kprobe p, 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;
		}

		static enum kprobe_insn __kprobes
		t32_decode_ldmstm(kprobe_opcode_t insn, struct arch_specific_insn *asi)
		{
		@@ -394,6 +403,28 @@ static const union decode_item t32_table_1111_0xxx___1[] = {
		/* WFI 1111 0011 1010 xxxx 10x0 x000 0000 0011 */
		DECODE_SIMULATE (0xfff0d7fc, 0xf3a08000, kprobe_simulate_nop),

		/* MRS Rd, CPSR 1111 0011 1110 xxxx 10x0 xxxx xxxx xxxx */
		DECODE_SIMULATEX(0xfff0d000, 0xf3e08000, t32_simulate_mrs,
		REGS(0, 0, NOSPPC, 0, 0)),

		/*
		* Unsupported instructions
		* 1111 0x11 1xxx xxxx 10x0 xxxx xxxx xxxx
		*
		* MSR 1111 0011 100x xxxx 10x0 xxxx xxxx xxxx
		* DBG hint 1111 0011 1010 xxxx 10x0 x000 1111 xxxx
		* Unallocated hints 1111 0011 1010 xxxx 10x0 x000 xxxx xxxx
		* CPS 1111 0011 1010 xxxx 10x0 xxxx xxxx xxxx
		* CLREX/DSB/DMB/ISB 1111 0011 1011 xxxx 10x0 xxxx xxxx xxxx
		* BXJ 1111 0011 1100 xxxx 10x0 xxxx xxxx xxxx
		* SUBS PC,LR,#<imm8> 1111 0011 1101 xxxx 10x0 xxxx xxxx xxxx
		* MRS Rd, SPSR 1111 0011 1111 xxxx 10x0 xxxx xxxx xxxx
		* SMC 1111 0111 1111 xxxx 1000 xxxx xxxx xxxx
		* UNDEFINED 1111 0111 1111 xxxx 1010 xxxx xxxx xxxx
		* ??? 1111 0111 1xxx xxxx 1010 xxxx xxxx xxxx
		*/
		DECODE_REJECT (0xfb80d000, 0xf3808000),

		DECODE_END
		};