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some riscv relocations added. not finished.

This commit is contained in:
Nicolas 2026-05-19 15:59:30 +02:00
parent fd24eddfa4
commit ae4116b1c6
1 changed files with 24 additions and 2 deletions
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26
src/copapy/_stencils.py
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@ -232,7 +232,7 @@ class stencil_database():
yield reloc_entry
def get_patch(self, relocation: relocation_entry, symbol_address: int, function_offset: int, symbol_type: int) -> patch_entry:
def get_patch(self, relocation: relocation_entry, symbol_address: int, function_offset: int, symbol_type: int) -> list[patch_entry]:
"""Return patch positions for a provided symbol (function or object)
Arguments:
@ -371,10 +371,32 @@ class stencil_database():
scale = 0x10000
#print(f" *> {pr.type} {patch_value=} {symbol_address=}, {function_offset=}, {pr.fields['r_addend']=}")
elif pr.type == 'R_RISCV_HI20':
# (S + A) & 0xFFFFF000
mask = 0xFFFFF000
patch_value = symbol_address + pr.fields['r_addend']
scale = 0x1000
#print(f" *> {pr.type} {patch_value=} {symbol_address=}, {function_offset=}, {pr.fields['r_addend']=}")
elif pr.type == 'R_RISCV_LO12_I':
# S + A
mask = 0xFFF00000
patch_value = symbol_address + pr.fields['r_addend']
#print(f" *> {pr.type} {patch_value=} {symbol_address=}, {function_offset=}")
elif pr.type == 'R_RISCV_CALL_PLT':
# S + A - P
mask = 0x3ffffff # 26 bit (1<<26)-1
patch_value = symbol_address + pr.fields['r_addend'] - patch_offset
scale = 4
return [patch_entry(mask, patch_offset, patch_value, scale, symbol_type),
patch_entry(mask, patch_offset, patch_value, scale, symbol_type)]
else:
raise NotImplementedError(f"Relocation type {pr.type} in {relocation.pelfy_reloc.target_section.name} pointing to {relocation.pelfy_reloc.symbol.name} not implemented")
return patch_entry(mask, patch_offset, patch_value, scale, symbol_type)
return [patch_entry(mask, patch_offset, patch_value, scale, symbol_type)]
def get_stencil_code(self, name: str) -> bytes:
"""Return the striped function code for a provided function name