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| author | zwelch <zwelch@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2009-07-15 23:48:27 +0000 |
|---|---|---|
| committer | zwelch <zwelch@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2009-07-15 23:48:27 +0000 |
| commit | d2088f0d2954d9ae798325b2e8922277372e4725 (patch) | |
| tree | 94a6d17f5d98bbfe5d7eed7dd26008a7e060e1f5 /src | |
| parent | f163d0009d99736c423b41db99ec015edf9814e5 (diff) | |
| download | openocd+libswd-d2088f0d2954d9ae798325b2e8922277372e4725.tar.gz openocd+libswd-d2088f0d2954d9ae798325b2e8922277372e4725.tar.bz2 openocd+libswd-d2088f0d2954d9ae798325b2e8922277372e4725.tar.xz openocd+libswd-d2088f0d2954d9ae798325b2e8922277372e4725.zip | |
David Brownell <david-b@pacbell.net>:
Make disassembly of the Thumb load-literal instruction show the
address of the literal being loaded (so users can avoid doing
that math themselves). Add and use an Align(PC,4) utility.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2535 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'src')
| -rw-r--r-- | src/target/arm_disassembler.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/src/target/arm_disassembler.c b/src/target/arm_disassembler.c index a3b61b58..1ea882d0 100644 --- a/src/target/arm_disassembler.c +++ b/src/target/arm_disassembler.c @@ -1678,6 +1678,12 @@ int evaluate_data_proc_thumb(uint16_t opcode, uint32_t address, arm_instruction_ return ERROR_OK; } +/* PC-relative data addressing is word-aligned even with Thumb */ +static inline uint32_t thumb_alignpc4(uint32_t addr) +{ + return (addr + 4) & ~3; +} + int evaluate_load_literal_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction) { uint32_t immediate; @@ -1685,16 +1691,19 @@ int evaluate_load_literal_thumb(uint16_t opcode, uint32_t address, arm_instructi instruction->type = ARM_LDR; immediate = opcode & 0x000000ff; - - snprintf(instruction->text, 128, - "0x%8.8" PRIx32 " 0x%4.4x \tLDR\tr%i, [pc, #%#" PRIx32 "]", - address, opcode, Rd, immediate*4); + immediate *= 4; instruction->info.load_store.Rd = Rd; instruction->info.load_store.Rn = 15 /*PC*/; instruction->info.load_store.index_mode = 0; /*offset*/ instruction->info.load_store.offset_mode = 0; /*immediate*/ - instruction->info.load_store.offset.offset = immediate*4; + instruction->info.load_store.offset.offset = immediate; + + snprintf(instruction->text, 128, + "0x%8.8" PRIx32 " 0x%4.4x \t" + "LDR\tr%i, [pc, #%#" PRIx32 "]\t; %#8.8x", + address, opcode, Rd, immediate, + thumb_alignpc4(address) + immediate); return ERROR_OK; } @@ -2753,8 +2762,7 @@ static int t2ev_data_immed(uint32_t opcode, uint32_t address, return ERROR_OK; do_adr: - address &= ~0x03; - address += 4; + address = thumb_alignpc4(address); if (add) address += immed; else |