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-rw-r--r--idatui/formats.py15
1 files changed, 12 insertions, 3 deletions
diff --git a/idatui/formats.py b/idatui/formats.py
index b2f784d..f09bb99 100644
--- a/idatui/formats.py
+++ b/idatui/formats.py
@@ -92,9 +92,18 @@ def needs_load_options(path: str) -> bool:
#: reach for first — arm64, aarch64, mips, m68k — are all invalid. Re-run the
#: script before adding to this list.
PROCESSORS: tuple[tuple[str, str], ...] = (
- # 'arm' covers AArch64 too; arm64/aarch64 are NOT valid -p names, so they
- # live in the label where the filter can still find them.
- ("arm", "ARM / AArch64 / arm64 — little-endian"),
+ # Bare 'arm' gives a 64-BIT database in IDA 9 (AArch64). That matters far
+ # more than it looks: Hex-Rays refuses a 32-bit function in a 64-bit database
+ # ("only 64-bit functions can be decompiled in the current database"), and
+ # Thumb doesn't exist in AArch64 at all — so a 32-bit ARM image loaded as
+ # plain 'arm' disassembles wrongly and can never be decompiled. The database
+ # bitness is fixed at load; it cannot be corrected afterwards (setting it
+ # post-hoc makes the decompiler INTERR). Pick the right one here.
+ ("arm", "ARM64 / AArch64 / arm64 — 64-bit, little-endian"),
+ ("arm:ARMv7-A", "ARM 32-bit (ARMv7-A) — Thumb capable, most firmware"),
+ ("arm:ARMv7-M", "ARM 32-bit (ARMv7-M) — Cortex-M, Thumb only"),
+ ("arm:ARMv6-M", "ARM 32-bit (ARMv6-M) — Cortex-M0/M0+"),
+ ("arm:ARMv5TE", "ARM 32-bit (ARMv5TE) — older SoCs"),
("armb", "ARM — big-endian"),
("metapc", "x86 / x86-64"),
("mipsl", "MIPS — little-endian"),