diff options
Diffstat (limited to 'gdb/arch/aarch64-insn.c')
| -rw-r--r-- | gdb/arch/aarch64-insn.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/gdb/arch/aarch64-insn.c b/gdb/arch/aarch64-insn.c index 3a289a2..13d0013 100644 --- a/gdb/arch/aarch64-insn.c +++ b/gdb/arch/aarch64-insn.c @@ -55,25 +55,44 @@ decode_masked_match (uint32_t insn, uint32_t mask, uint32_t pattern) return (insn & mask) == pattern; } -/* Decode an opcode if it represents an ADRP instruction. +/* Decode an opcode if it represents an ADR or ADRP instruction. ADDR specifies the address of the opcode. INSN specifies the opcode to test. + IS_ADRP receives the 'op' field from the decoded instruction. RD receives the 'rd' field from the decoded instruction. + OFFSET receives the 'immhi:immlo' field from the decoded instruction. Return 1 if the opcodes matches and is decoded, otherwise 0. */ int -aarch64_decode_adrp (CORE_ADDR addr, uint32_t insn, unsigned *rd) +aarch64_decode_adr (CORE_ADDR addr, uint32_t insn, int *is_adrp, + unsigned *rd, int32_t *offset) { - if (decode_masked_match (insn, 0x9f000000, 0x90000000)) + /* adr 0ii1 0000 iiii iiii iiii iiii iiir rrrr */ + /* adrp 1ii1 0000 iiii iiii iiii iiii iiir rrrr */ + if (decode_masked_match (insn, 0x1f000000, 0x10000000)) { + uint32_t immlo = (insn >> 29) & 0x3; + int32_t immhi = extract_signed_bitfield (insn, 19, 5) << 2; + + *is_adrp = (insn >> 31) & 0x1; *rd = (insn >> 0) & 0x1f; + if (*is_adrp) + { + /* The ADRP instruction has an offset with a -/+ 4GB range, + encoded as (immhi:immlo * 4096). */ + *offset = (immhi | immlo) * 4096; + } + else + *offset = (immhi | immlo); + if (aarch64_debug) { - debug_printf ("decode: 0x%s 0x%x adrp x%u, #?\n", - core_addr_to_string_nz (addr), insn, *rd); + debug_printf ("decode: 0x%s 0x%x %s x%u, #?\n", + core_addr_to_string_nz (addr), insn, + *is_adrp ? "adrp" : "adr", *rd); } return 1; } |