ARM: kprobes: Decode 32-bit Thumb data-processing (modified immediate) instructions

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>

diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c
index eac945c..cf83448 100644 (file)
--- a/arch/arm/kernel/kprobes-thumb.c
+++ b/arch/arm/kernel/kprobes-thumb.c
@@ -241,6 +241,58 @@ static const union decode_item t32_table_1110_101x[] = {
        DECODE_END
 };
 
+static const union decode_item t32_table_1111_0x0x___0[] = {
+       /* Data-processing (modified immediate)                         */
+
+       /* TST                  1111 0x00 0001 xxxx 0xxx 1111 xxxx xxxx */
+       /* TEQ                  1111 0x00 1001 xxxx 0xxx 1111 xxxx xxxx */
+       DECODE_EMULATEX (0xfb708f00, 0xf0100f00, t32_emulate_rd8rn16rm0_rwflags,
+                                                REGS(NOSPPC, 0, 0, 0, 0)),
+
+       /* CMN                  1111 0x01 0001 xxxx 0xxx 1111 xxxx xxxx */
+       DECODE_OR       (0xfbf08f00, 0xf1100f00),
+       /* CMP                  1111 0x01 1011 xxxx 0xxx 1111 xxxx xxxx */
+       DECODE_EMULATEX (0xfbf08f00, 0xf1b00f00, t32_emulate_rd8rn16rm0_rwflags,
+                                                REGS(NOPC, 0, 0, 0, 0)),
+
+       /* MOV                  1111 0x00 010x 1111 0xxx xxxx xxxx xxxx */
+       /* MVN                  1111 0x00 011x 1111 0xxx xxxx xxxx xxxx */
+       DECODE_EMULATEX (0xfbcf8000, 0xf04f0000, t32_emulate_rd8rn16rm0_rwflags,
+                                                REGS(0, 0, NOSPPC, 0, 0)),
+
+       /* ???                  1111 0x00 101x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_REJECT   (0xfbe08000, 0xf0a00000),
+       /* ???                  1111 0x00 110x xxxx 0xxx xxxx xxxx xxxx */
+       /* ???                  1111 0x00 111x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_REJECT   (0xfbc08000, 0xf0c00000),
+       /* ???                  1111 0x01 001x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_REJECT   (0xfbe08000, 0xf1200000),
+       /* ???                  1111 0x01 100x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_REJECT   (0xfbe08000, 0xf1800000),
+       /* ???                  1111 0x01 111x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_REJECT   (0xfbe08000, 0xf1e00000),
+
+       /* ADD Rd, SP, #imm     1111 0x01 000x 1101 0xxx xxxx xxxx xxxx */
+       /* SUB Rd, SP, #imm     1111 0x01 101x 1101 0xxx xxxx xxxx xxxx */
+       DECODE_EMULATEX (0xfb4f8000, 0xf10d0000, t32_emulate_rd8rn16rm0_rwflags,
+                                                REGS(SP, 0, NOPC, 0, 0)),
+
+       /* AND                  1111 0x00 000x xxxx 0xxx xxxx xxxx xxxx */
+       /* BIC                  1111 0x00 001x xxxx 0xxx xxxx xxxx xxxx */
+       /* ORR                  1111 0x00 010x xxxx 0xxx xxxx xxxx xxxx */
+       /* ORN                  1111 0x00 011x xxxx 0xxx xxxx xxxx xxxx */
+       /* EOR                  1111 0x00 100x xxxx 0xxx xxxx xxxx xxxx */
+       /* ADD                  1111 0x01 000x xxxx 0xxx xxxx xxxx xxxx */
+       /* ADC                  1111 0x01 010x xxxx 0xxx xxxx xxxx xxxx */
+       /* SBC                  1111 0x01 011x xxxx 0xxx xxxx xxxx xxxx */
+       /* SUB                  1111 0x01 101x xxxx 0xxx xxxx xxxx xxxx */
+       /* RSB                  1111 0x01 110x xxxx 0xxx xxxx xxxx xxxx */
+       DECODE_EMULATEX (0xfa008000, 0xf0000000, t32_emulate_rd8rn16rm0_rwflags,
+                                                REGS(NOSPPC, 0, NOSPPC, 0, 0)),
+
+       DECODE_END
+};
+
 static const union decode_item t32_table_1111_0xxx___1[] = {
        /* Branches and miscellaneous control                           */
 
@@ -277,6 +329,12 @@ const union decode_item kprobe_decode_thumb32_table[] = {
        DECODE_TABLE    (0xfe000000, 0xea000000, t32_table_1110_101x),
 
        /*
+        * Data-processing (modified immediate)
+        *                      1111 0x0x xxxx xxxx 0xxx xxxx xxxx xxxx
+        */
+       DECODE_TABLE    (0xfa008000, 0xf0000000, t32_table_1111_0x0x___0),
+
+       /*
         * Branches and miscellaneous control
         *                      1111 0xxx xxxx xxxx 1xxx xxxx xxxx xxxx
         */