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Extended test for ARM thumb relocations and added reference disassembly

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Nicolas 2026-02-27 17:58:55 +01:00
parent 9a4cbe92af
commit 940488b660
2 changed files with 4278 additions and 0 deletions
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4213
tests/obj/stencils_armv7thumb_O3_THM_MOVW.asm Normal file
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tests/test_thumb_addend.py Normal file
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import pelfy._main as _main
import os
def test_thumb_addend_extraction():
# Path to the test object file
obj_path = os.path.join('tests', 'obj', 'stencils_armv7thumb_O3_THM_MOVW.o')
elf = _main.open_elf_file(obj_path)
# Collect all relocations of interest
reloc_addends: list[tuple[str, int, int, str]] = []
for reloc in elf.get_relocations():
if reloc.type.startswith('R_ARM_THM'):
reloc_addends.append((reloc.type, reloc['r_offset'], reloc['r_addend'], reloc.symbol.name))
# Reference values from the .asm file (addend = 0 for all Thumb relocations)
reference = [
('R_ARM_THM_MOVW_ABS_NC', None, 0, 'dummy_int'),
('R_ARM_THM_MOVT_ABS', None, 0, 'dummy_int'),
('R_ARM_THM_MOVW_ABS_NC', None, 0, 'dummy_float'),
('R_ARM_THM_MOVT_ABS', None, 0, 'dummy_float'),
('R_ARM_THM_JUMP24', 0x14, 0, 'auxsub_get_42'),
('R_ARM_THM_CALL', 0xA, 0, 'result_int'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float_int'),
('R_ARM_THM_JUMP24', 0xC, 0, 'result_float_float'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_int_int'),
('R_ARM_THM_JUMP24', 0xC, 0, 'result_int_float'),
('R_ARM_THM_CALL', 0xA, 0, 'aux_get_42'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'aux_get_42'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float'),
('R_ARM_THM_JUMP24', 0x2, 0, 'result_int'),
('R_ARM_THM_JUMP24', 0x4, 0, 'result_float'),
('R_ARM_THM_JUMP24', 0x28, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2C, 0, 'sqrtf'),
('R_ARM_THM_JUMP24', 0x20, 0, 'result_float'),
('R_ARM_THM_CALL', 0x24, 0, 'sqrtf'),
('R_ARM_THM_CALL', 0xA, 0, 'expf'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'expf'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float'),
('R_ARM_THM_CALL', 0xA, 0, 'logf'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'logf'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float'),
('R_ARM_THM_CALL', 0xA, 0, 'sinf'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'sinf'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float'),
('R_ARM_THM_CALL', 0xA, 0, 'cosf'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'cosf'),
('R_ARM_THM_JUMP24', 0xA, 0, 'result_float'),
('R_ARM_THM_CALL', 0xA, 0, 'tanf'),
('R_ARM_THM_JUMP24', 0x12, 0, 'result_float'),
('R_ARM_THM_CALL', 0x2, 0, 'tanf'),
]
# For each reference, check that at least one matching relocation has the expected addend
for ref_type, _, ref_addend, ref_symbol in reference:
found = False
addend = 0
for typ, offset, addend, symbol in reloc_addends:
if typ == ref_type and symbol == ref_symbol and addend == ref_addend:
found = True
break
assert found, f"Missing or incorrect addend for {ref_type} {ref_symbol} (value={addend:X}, expected {ref_addend})"