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revert struct reference pointer sizes to i8 to ensure that compiler does not optimize

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varun-r-mallya
2025-10-27 03:28:16 +05:30
parent ac74b03b14
commit 07580dabf2
3 changed files with 13 additions and 14 deletions
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21
pythonbpf/vmlinux_parser/vmlinux_exports_handler.py
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@ -97,7 +97,7 @@ class VmlinuxHandler:
globvar_ir, field_data = self.get_field_type(
python_type.__name__, field_name
)
builder.function.args[0].type = ir.PointerType(ir.IntType(64))
builder.function.args[0].type = ir.PointerType(ir.IntType(8))
print(builder.function.args[0])
field_ptr = self.load_ctx_field(
builder, builder.function.args[0], globvar_ir
@ -125,19 +125,18 @@ class VmlinuxHandler:
# Load the offset value
offset = builder.load(offset_global)
# # Ensure ctx_arg is treated as i8* (byte pointer)
# # i8_type = ir.IntType(8)
# i8_ptr_type = ir.PointerType()
# Ensure ctx_arg is treated as i8* (byte pointer)
i8_ptr_type = ir.PointerType()
# Cast ctx_arg to i8* if it isn't already
# if str(ctx_arg.type) != str(i8_ptr_type):
# ctx_i8_ptr = builder.bitcast(ctx_arg, i8_ptr_type)
# else:
# ctx_i8_ptr = ctx_arg
if str(ctx_arg.type) != str(i8_ptr_type):
ctx_i8_ptr = builder.bitcast(ctx_arg, i8_ptr_type)
else:
ctx_i8_ptr = ctx_arg
# GEP with explicit type - this is the key fix
field_ptr = builder.gep(
ctx_arg,
ctx_i8_ptr,
[offset],
inbounds=False,
)
@ -151,8 +150,8 @@ class VmlinuxHandler:
raise KeyError
except (KeyError, AttributeError):
passthrough_type = ir.FunctionType(
ir.PointerType(),
[ir.IntType(32), ir.PointerType()],
i8_ptr_type,
[ir.IntType(32), i8_ptr_type],
)
passthrough_fn = ir.Function(
module,