mirror of
https://git.proxmox.com/git/mirror_ubuntu-kernels.git
synced 2025-12-04 17:34:19 +00:00
93281c4a96
Users of the instruction decoder should use this to decode instruction bytes. For that, have insn*() helpers return an int value to denote success/failure. When there's an error fetching the next insn byte and the insn falls short, return -ENODATA to denote that. While at it, make insn_get_opcode() more stricter as to whether what has seen so far is a valid insn and if not. Copy linux/kconfig.h for the tools-version of the decoder so that it can use IS_ENABLED(). Also, cast the INSN_MODE_KERN dummy define value to (enum insn_mode) for tools use of the decoder because perf tool builds with -Werror and errors out with -Werror=sign-compare otherwise. Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Link: https://lkml.kernel.org/r/20210304174237.31945-5-bp@alien8.de
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _TOOLS_LINUX_KCONFIG_H
|
|
#define _TOOLS_LINUX_KCONFIG_H
|
|
|
|
/* CONFIG_CC_VERSION_TEXT (Do not delete this comment. See help in Kconfig) */
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
#define __BIG_ENDIAN 4321
|
|
#else
|
|
#define __LITTLE_ENDIAN 1234
|
|
#endif
|
|
|
|
#define __ARG_PLACEHOLDER_1 0,
|
|
#define __take_second_arg(__ignored, val, ...) val
|
|
|
|
/*
|
|
* The use of "&&" / "||" is limited in certain expressions.
|
|
* The following enable to calculate "and" / "or" with macro expansion only.
|
|
*/
|
|
#define __and(x, y) ___and(x, y)
|
|
#define ___and(x, y) ____and(__ARG_PLACEHOLDER_##x, y)
|
|
#define ____and(arg1_or_junk, y) __take_second_arg(arg1_or_junk y, 0)
|
|
|
|
#define __or(x, y) ___or(x, y)
|
|
#define ___or(x, y) ____or(__ARG_PLACEHOLDER_##x, y)
|
|
#define ____or(arg1_or_junk, y) __take_second_arg(arg1_or_junk 1, y)
|
|
|
|
/*
|
|
* Helper macros to use CONFIG_ options in C/CPP expressions. Note that
|
|
* these only work with boolean and tristate options.
|
|
*/
|
|
|
|
/*
|
|
* Getting something that works in C and CPP for an arg that may or may
|
|
* not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1"
|
|
* we match on the placeholder define, insert the "0," for arg1 and generate
|
|
* the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one).
|
|
* When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
|
|
* the last step cherry picks the 2nd arg, we get a zero.
|
|
*/
|
|
#define __is_defined(x) ___is_defined(x)
|
|
#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val)
|
|
#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0)
|
|
|
|
/*
|
|
* IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
|
|
* otherwise. For boolean options, this is equivalent to
|
|
* IS_ENABLED(CONFIG_FOO).
|
|
*/
|
|
#define IS_BUILTIN(option) __is_defined(option)
|
|
|
|
/*
|
|
* IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
|
|
* otherwise.
|
|
*/
|
|
#define IS_MODULE(option) __is_defined(option##_MODULE)
|
|
|
|
/*
|
|
* IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
|
|
* code can call a function defined in code compiled based on CONFIG_FOO.
|
|
* This is similar to IS_ENABLED(), but returns false when invoked from
|
|
* built-in code when CONFIG_FOO is set to 'm'.
|
|
*/
|
|
#define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
|
|
__and(IS_MODULE(option), __is_defined(MODULE)))
|
|
|
|
/*
|
|
* IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
|
|
* 0 otherwise.
|
|
*/
|
|
#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
|
|
|
|
#endif /* _TOOLS_LINUX_KCONFIG_H */
|