517 lines
18 KiB
Python
517 lines
18 KiB
Python
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#!/usr/bin/env python3
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# Architecture commands for GDB, the GNU debugger.
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#
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# Copyright (C) 1998-2022 Free Software Foundation, Inc.
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#
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# This file is part of GDB.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import textwrap
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import gdbcopyright
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# All the components created in gdbarch-components.py.
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components = []
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def join_type_and_name(t, n):
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"Combine the type T and the name N into a C declaration."
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if t.endswith("*") or t.endswith("&"):
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return t + n
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else:
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return t + " " + n
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def join_params(params):
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"""Given a sequence of (TYPE, NAME) pairs, generate a comma-separated
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list of declarations."""
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params = [join_type_and_name(p[0], p[1]) for p in params]
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return ", ".join(params)
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class _Component:
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"Base class for all components."
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def __init__(self, **kwargs):
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for key in kwargs:
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setattr(self, key, kwargs[key])
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components.append(self)
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def get_predicate(self):
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"Return the expression used for validity checking."
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assert self.predicate and not isinstance(self.invalid, str)
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if self.predefault:
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predicate = f"gdbarch->{self.name} != {self.predefault}"
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elif isinstance(c, Value):
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predicate = f"gdbarch->{self.name} != 0"
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else:
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predicate = f"gdbarch->{self.name} != NULL"
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return predicate
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class Info(_Component):
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"An Info component is copied from the gdbarch_info."
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def __init__(self, *, name, type, printer=None):
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super().__init__(name=name, type=type, printer=printer)
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# This little hack makes the generator a bit simpler.
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self.predicate = None
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class Value(_Component):
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"A Value component is just a data member."
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def __init__(
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self,
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*,
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name,
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type,
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comment=None,
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predicate=None,
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predefault=None,
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postdefault=None,
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invalid=None,
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printer=None,
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):
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super().__init__(
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comment=comment,
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name=name,
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type=type,
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predicate=predicate,
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predefault=predefault,
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postdefault=postdefault,
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invalid=invalid,
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printer=printer,
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)
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class Function(_Component):
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"A Function component is a function pointer member."
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def __init__(
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self,
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*,
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name,
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type,
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params,
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comment=None,
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predicate=None,
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predefault=None,
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postdefault=None,
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invalid=None,
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printer=None,
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):
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super().__init__(
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comment=comment,
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name=name,
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type=type,
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predicate=predicate,
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predefault=predefault,
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postdefault=postdefault,
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invalid=invalid,
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printer=printer,
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params=params,
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)
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def ftype(self):
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"Return the name of the function typedef to use."
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return f"gdbarch_{self.name}_ftype"
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def param_list(self):
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"Return the formal parameter list as a string."
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return join_params(self.params)
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def set_list(self):
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"""Return the formal parameter list of the caller function,
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as a string. This list includes the gdbarch."""
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arch_arg = ("struct gdbarch *", "gdbarch")
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arch_tuple = [arch_arg]
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return join_params(arch_tuple + list(self.params))
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def actuals(self):
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"Return the actual parameters to forward, as a string."
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return ", ".join([p[1] for p in self.params])
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class Method(Function):
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"A Method is like a Function but passes the gdbarch through."
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def param_list(self):
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"See superclass."
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return self.set_list()
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def actuals(self):
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"See superclass."
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result = ["gdbarch"] + [p[1] for p in self.params]
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return ", ".join(result)
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# Read the components.
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with open("gdbarch-components.py") as fd:
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exec(fd.read())
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copyright = gdbcopyright.copyright(
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"gdbarch.py", "Dynamic architecture support for GDB, the GNU debugger."
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)
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def info(c):
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"Filter function to only allow Info components."
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return type(c) is Info
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def not_info(c):
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"Filter function to omit Info components."
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return type(c) is not Info
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with open("gdbarch-gen.h", "w") as f:
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print(copyright, file=f)
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print(file=f)
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print(file=f)
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print("/* The following are pre-initialized by GDBARCH. */", file=f)
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# Do Info components first.
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for c in filter(info, components):
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print(file=f)
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print(
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f"""extern {c.type} gdbarch_{c.name} (struct gdbarch *gdbarch);
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/* set_gdbarch_{c.name}() - not applicable - pre-initialized. */""",
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file=f,
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)
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print(file=f)
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print(file=f)
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print("/* The following are initialized by the target dependent code. */", file=f)
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# Generate decls for accessors, setters, and predicates for all
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# non-Info components.
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for c in filter(not_info, components):
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if c.comment:
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print(file=f)
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comment = c.comment.split("\n")
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if comment[0] == "":
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comment = comment[1:]
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if comment[-1] == "":
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comment = comment[:-1]
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print("/* ", file=f, end="")
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print(comment[0], file=f, end="")
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if len(comment) > 1:
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print(file=f)
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print(
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textwrap.indent("\n".join(comment[1:]), prefix=" "),
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end="",
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file=f,
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)
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print(" */", file=f)
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if c.predicate:
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print(file=f)
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print(f"extern bool gdbarch_{c.name}_p (struct gdbarch *gdbarch);", file=f)
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print(file=f)
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if isinstance(c, Value):
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print(
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f"extern {c.type} gdbarch_{c.name} (struct gdbarch *gdbarch);",
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file=f,
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)
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print(
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f"extern void set_gdbarch_{c.name} (struct gdbarch *gdbarch, {c.type} {c.name});",
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file=f,
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)
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else:
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assert isinstance(c, Function)
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print(
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f"typedef {c.type} ({c.ftype()}) ({c.param_list()});",
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file=f,
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)
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print(
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f"extern {c.type} gdbarch_{c.name} ({c.set_list()});",
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file=f,
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)
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print(
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f"extern void set_gdbarch_{c.name} (struct gdbarch *gdbarch, {c.ftype()} *{c.name});",
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file=f,
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)
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with open("gdbarch.c", "w") as f:
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print(copyright, file=f)
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print(file=f)
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print("/* Maintain the struct gdbarch object. */", file=f)
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print(file=f)
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#
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# The struct definition body.
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#
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print("struct gdbarch", file=f)
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print("{", file=f)
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print(" /* Has this architecture been fully initialized? */", file=f)
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print(" int initialized_p;", file=f)
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print(file=f)
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print(" /* An obstack bound to the lifetime of the architecture. */", file=f)
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print(" struct obstack *obstack;", file=f)
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print(file=f)
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print(" /* basic architectural information. */", file=f)
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for c in filter(info, components):
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print(f" {c.type} {c.name};", file=f)
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print(file=f)
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print(" /* target specific vector. */", file=f)
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print(" struct gdbarch_tdep *tdep;", file=f)
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print(" gdbarch_dump_tdep_ftype *dump_tdep;", file=f)
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print(file=f)
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print(" /* per-architecture data-pointers. */", file=f)
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print(" unsigned nr_data;", file=f)
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print(" void **data;", file=f)
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print(file=f)
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for c in filter(not_info, components):
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if isinstance(c, Value):
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print(f" {c.type} {c.name};", file=f)
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else:
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assert isinstance(c, Function)
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print(f" gdbarch_{c.name}_ftype *{c.name};", file=f)
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print("};", file=f)
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print(file=f)
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#
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# Initialization.
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#
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print("/* Create a new ``struct gdbarch'' based on information provided by", file=f)
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print(" ``struct gdbarch_info''. */", file=f)
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print(file=f)
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print("struct gdbarch *", file=f)
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print("gdbarch_alloc (const struct gdbarch_info *info,", file=f)
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print(" struct gdbarch_tdep *tdep)", file=f)
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print("{", file=f)
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print(" struct gdbarch *gdbarch;", file=f)
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print("", file=f)
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print(
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" /* Create an obstack for allocating all the per-architecture memory,", file=f
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)
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print(" then use that to allocate the architecture vector. */", file=f)
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print(" struct obstack *obstack = XNEW (struct obstack);", file=f)
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print(" obstack_init (obstack);", file=f)
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print(" gdbarch = XOBNEW (obstack, struct gdbarch);", file=f)
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print(" memset (gdbarch, 0, sizeof (*gdbarch));", file=f)
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print(" gdbarch->obstack = obstack;", file=f)
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print(file=f)
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print(" alloc_gdbarch_data (gdbarch);", file=f)
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print(file=f)
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print(" gdbarch->tdep = tdep;", file=f)
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print(file=f)
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for c in filter(info, components):
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print(f" gdbarch->{c.name} = info->{c.name};", file=f)
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print(file=f)
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print(" /* Force the explicit initialization of these. */", file=f)
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for c in filter(not_info, components):
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if c.predefault and c.predefault != "0":
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print(f" gdbarch->{c.name} = {c.predefault};", file=f)
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print(" /* gdbarch_alloc() */", file=f)
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print(file=f)
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print(" return gdbarch;", file=f)
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print("}", file=f)
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print(file=f)
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print(file=f)
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print(file=f)
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#
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# Post-initialization validation and updating
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#
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print("/* Ensure that all values in a GDBARCH are reasonable. */", file=f)
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print(file=f)
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print("static void", file=f)
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print("verify_gdbarch (struct gdbarch *gdbarch)", file=f)
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print("{", file=f)
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print(" string_file log;", file=f)
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print(file=f)
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print(" /* fundamental */", file=f)
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print(" if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)", file=f)
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print(""" log.puts ("\\n\\tbyte-order");""", file=f)
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print(" if (gdbarch->bfd_arch_info == NULL)", file=f)
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print(""" log.puts ("\\n\\tbfd_arch_info");""", file=f)
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print(
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" /* Check those that need to be defined for the given multi-arch level. */",
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file=f,
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)
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for c in filter(not_info, components):
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if c.invalid is False:
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print(f" /* Skip verify of {c.name}, invalid_p == 0 */", file=f)
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elif c.predicate:
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print(f" /* Skip verify of {c.name}, has predicate. */", file=f)
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elif isinstance(c.invalid, str) and c.postdefault is not None:
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print(f" if ({c.invalid})", file=f)
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print(f" gdbarch->{c.name} = {c.postdefault};", file=f)
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elif c.predefault is not None and c.postdefault is not None:
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print(f" if (gdbarch->{c.name} == {c.predefault})", file=f)
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print(f" gdbarch->{c.name} = {c.postdefault};", file=f)
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elif c.postdefault is not None:
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print(f" if (gdbarch->{c.name} == 0)", file=f)
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print(f" gdbarch->{c.name} = {c.postdefault};", file=f)
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elif isinstance(c.invalid, str):
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print(f" if ({c.invalid})", file=f)
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print(f""" log.puts ("\\n\\t{c.name}");""", file=f)
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elif c.predefault is not None:
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print(f" if (gdbarch->{c.name} == {c.predefault})", file=f)
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print(f""" log.puts ("\\n\\t{c.name}");""", file=f)
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elif c.invalid is True:
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print(f" if (gdbarch->{c.name} == 0)", file=f)
|
||
|
|
print(f""" log.puts ("\\n\\t{c.name}");""", file=f)
|
||
|
|
else:
|
||
|
|
# We should not allow ourselves to simply do nothing here
|
||
|
|
# because no other case applies. If we end up here then
|
||
|
|
# either the input data needs adjusting so one of the
|
||
|
|
# above cases matches, or we need additional cases adding
|
||
|
|
# here.
|
||
|
|
raise Exception("unhandled case when generating gdbarch validation")
|
||
|
|
print(" if (!log.empty ())", file=f)
|
||
|
|
print(" internal_error (__FILE__, __LINE__,", file=f)
|
||
|
|
print(""" _("verify_gdbarch: the following are invalid ...%s"),""", file=f)
|
||
|
|
print(" log.c_str ());", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
print(file=f)
|
||
|
|
print(file=f)
|
||
|
|
#
|
||
|
|
# Dumping.
|
||
|
|
#
|
||
|
|
print("/* Print out the details of the current architecture. */", file=f)
|
||
|
|
print(file=f)
|
||
|
|
print("void", file=f)
|
||
|
|
print("gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(""" const char *gdb_nm_file = "<not-defined>";""", file=f)
|
||
|
|
print(file=f)
|
||
|
|
print("#if defined (GDB_NM_FILE)", file=f)
|
||
|
|
print(" gdb_nm_file = GDB_NM_FILE;", file=f)
|
||
|
|
print("#endif", file=f)
|
||
|
|
print(" gdb_printf (file,", file=f)
|
||
|
|
print(""" "gdbarch_dump: GDB_NM_FILE = %s\\n",""", file=f)
|
||
|
|
print(" gdb_nm_file);", file=f)
|
||
|
|
for c in components:
|
||
|
|
if c.predicate:
|
||
|
|
print(" gdb_printf (file,", file=f)
|
||
|
|
print(
|
||
|
|
f""" "gdbarch_dump: gdbarch_{c.name}_p() = %d\\n",""",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print(f" gdbarch_{c.name}_p (gdbarch));", file=f)
|
||
|
|
if isinstance(c, Function):
|
||
|
|
print(" gdb_printf (file,", file=f)
|
||
|
|
print(
|
||
|
|
f""" "gdbarch_dump: {c.name} = <%s>\\n",""", file=f
|
||
|
|
)
|
||
|
|
print(
|
||
|
|
f" host_address_to_string (gdbarch->{c.name}));",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
if c.printer:
|
||
|
|
printer = c.printer
|
||
|
|
elif c.type == "CORE_ADDR":
|
||
|
|
printer = f"core_addr_to_string_nz (gdbarch->{c.name})"
|
||
|
|
else:
|
||
|
|
printer = f"plongest (gdbarch->{c.name})"
|
||
|
|
print(" gdb_printf (file,", file=f)
|
||
|
|
print(
|
||
|
|
f""" "gdbarch_dump: {c.name} = %s\\n",""", file=f
|
||
|
|
)
|
||
|
|
print(f" {printer});", file=f)
|
||
|
|
print(" if (gdbarch->dump_tdep != NULL)", file=f)
|
||
|
|
print(" gdbarch->dump_tdep (gdbarch, file);", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
print(file=f)
|
||
|
|
#
|
||
|
|
# Bodies of setter, accessor, and predicate functions.
|
||
|
|
#
|
||
|
|
for c in components:
|
||
|
|
if c.predicate:
|
||
|
|
print(file=f)
|
||
|
|
print("bool", file=f)
|
||
|
|
print(f"gdbarch_{c.name}_p (struct gdbarch *gdbarch)", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(" gdb_assert (gdbarch != NULL);", file=f)
|
||
|
|
print(f" return {c.get_predicate()};", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
if isinstance(c, Function):
|
||
|
|
print(file=f)
|
||
|
|
print(f"{c.type}", file=f)
|
||
|
|
print(f"gdbarch_{c.name} ({c.set_list()})", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(" gdb_assert (gdbarch != NULL);", file=f)
|
||
|
|
print(f" gdb_assert (gdbarch->{c.name} != NULL);", file=f)
|
||
|
|
if c.predicate and c.predefault:
|
||
|
|
# Allow a call to a function with a predicate.
|
||
|
|
print(
|
||
|
|
f" /* Do not check predicate: {c.get_predicate()}, allow call. */",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print(" if (gdbarch_debug >= 2)", file=f)
|
||
|
|
print(
|
||
|
|
f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print(" ", file=f, end="")
|
||
|
|
if c.type != "void":
|
||
|
|
print("return ", file=f, end="")
|
||
|
|
print(f"gdbarch->{c.name} ({c.actuals()});", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
print(file=f)
|
||
|
|
print("void", file=f)
|
||
|
|
print(f"set_gdbarch_{c.name} (struct gdbarch *gdbarch,", file=f)
|
||
|
|
print(
|
||
|
|
f" {' ' * len(c.name)} gdbarch_{c.name}_ftype {c.name})",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print("{", file=f)
|
||
|
|
print(f" gdbarch->{c.name} = {c.name};", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
elif isinstance(c, Value):
|
||
|
|
print(file=f)
|
||
|
|
print(f"{c.type}", file=f)
|
||
|
|
print(f"gdbarch_{c.name} (struct gdbarch *gdbarch)", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(" gdb_assert (gdbarch != NULL);", file=f)
|
||
|
|
if c.invalid is False:
|
||
|
|
print(f" /* Skip verify of {c.name}, invalid_p == 0 */", file=f)
|
||
|
|
elif isinstance(c.invalid, str):
|
||
|
|
print(" /* Check variable is valid. */", file=f)
|
||
|
|
print(f" gdb_assert (!({c.invalid}));", file=f)
|
||
|
|
elif c.predefault:
|
||
|
|
print(" /* Check variable changed from pre-default. */", file=f)
|
||
|
|
print(f" gdb_assert (gdbarch->{c.name} != {c.predefault});", file=f)
|
||
|
|
print(" if (gdbarch_debug >= 2)", file=f)
|
||
|
|
print(
|
||
|
|
f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print(f" return gdbarch->{c.name};", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
print(file=f)
|
||
|
|
print("void", file=f)
|
||
|
|
print(f"set_gdbarch_{c.name} (struct gdbarch *gdbarch,", file=f)
|
||
|
|
print(f" {' ' * len(c.name)} {c.type} {c.name})", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(f" gdbarch->{c.name} = {c.name};", file=f)
|
||
|
|
print("}", file=f)
|
||
|
|
else:
|
||
|
|
assert isinstance(c, Info)
|
||
|
|
print(file=f)
|
||
|
|
print(f"{c.type}", file=f)
|
||
|
|
print(f"gdbarch_{c.name} (struct gdbarch *gdbarch)", file=f)
|
||
|
|
print("{", file=f)
|
||
|
|
print(" gdb_assert (gdbarch != NULL);", file=f)
|
||
|
|
print(" if (gdbarch_debug >= 2)", file=f)
|
||
|
|
print(
|
||
|
|
f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
|
||
|
|
file=f,
|
||
|
|
)
|
||
|
|
print(f" return gdbarch->{c.name};", file=f)
|
||
|
|
print("}", file=f)
|