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| author | James Marshall <jcmarsh@gwmail.gwu.edu> | 2018-01-16 21:08:16 -0500 |
|---|---|---|
| committer | Matthias Welwarsky <matthias@welwarsky.de> | 2018-06-22 07:42:27 +0100 |
| commit | a0356398e54984d292f4e6812cd67a9874b62f0d (patch) | |
| tree | f6e093419230fb6facf1efefb24513c721cc2b7c /src/target | |
| parent | 548bcee30dcfec3174e563e53ffb1559104b8a97 (diff) | |
| download | riscv-openocd-a0356398e54984d292f4e6812cd67a9874b62f0d.zip riscv-openocd-a0356398e54984d292f4e6812cd67a9874b62f0d.tar.gz riscv-openocd-a0356398e54984d292f4e6812cd67a9874b62f0d.tar.bz2 | |
target/arm: Add PLD command to ARM disassembler.
Updates the ARM disassembler to handle PLD (PreLoad Data) commands.
Previously handled by printing a TODO message. There are three forms of
the command: literal, register, and immediate. Simply decode based off
of the A1 encoding for the instructions in the ARM ARM. Also fixes mask
to handle PLDW commands.
Change-Id: I63bf97f16af254e838462c7cfac80f6c4681c556
Signed-off-by: James Marshall <jcmarsh@gwmail.gwu.edu>
Reviewed-on: http://openocd.zylin.com/4348
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Diffstat (limited to 'src/target')
| -rw-r--r-- | src/target/arm_disassembler.c | 75 |
1 files changed, 69 insertions, 6 deletions
diff --git a/src/target/arm_disassembler.c b/src/target/arm_disassembler.c index 17948d6..8eb8194 100644 --- a/src/target/arm_disassembler.c +++ b/src/target/arm_disassembler.c @@ -118,15 +118,78 @@ static int evaluate_pld(uint32_t opcode, uint32_t address, struct arm_instruction *instruction) { /* PLD */ - if ((opcode & 0x0d70f000) == 0x0550f000) { + if ((opcode & 0x0d30f000) == 0x0510f000) { + uint8_t Rn; + uint8_t U; + unsigned offset; + instruction->type = ARM_PLD; + Rn = (opcode & 0xf0000) >> 16; + U = (opcode & 0x00800000) >> 23; + if (Rn == 0xf) { + /* literal */ + offset = opcode & 0x0fff; + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD %s%d", + address, opcode, U ? "" : "-", offset); + } else { + uint8_t I, R; - snprintf(instruction->text, - 128, - "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD ...TODO...", - address, - opcode); + I = (opcode & 0x02000000) >> 25; + R = (opcode & 0x00400000) >> 22; + + if (I) { + /* register PLD{W} [<Rn>,+/-<Rm>{, <shift>}] */ + offset = (opcode & 0x0F80) >> 7; + uint8_t Rm; + Rm = opcode & 0xf; + + if (offset == 0) { + /* No shift */ + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d]", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm); + + } else { + uint8_t shift; + shift = (opcode & 0x60) >> 5; + if (shift == 0x0) { + /* LSL */ + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, LSL #0x%x)", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset); + } else if (shift == 0x1) { + /* LSR */ + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, LSR #0x%x)", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset); + } else if (shift == 0x2) { + /* ASR */ + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, ASR #0x%x)", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset); + } else if (shift == 0x3) { + /* ROR */ + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, ROR #0x%x)", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset); + } + } + } else { + /* immediate PLD{W} [<Rn>, #+/-<imm12>] */ + offset = opcode & 0x0fff; + if (offset == 0) { + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d]", + address, opcode, R ? "" : "W", Rn); + } else { + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, #%s%d]", + address, opcode, R ? "" : "W", Rn, U ? "" : "-", offset); + } + } + } return ERROR_OK; } /* DSB */ |