From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: mark.rutland@arm.com, linux-efi@vger.kernel.org,
michal.lkml@markovi.net, keescook@chromium.org,
peterz@infradead.org, catalin.marinas@arm.com,
masahiroy@kernel.org, broonie@kernel.org,
linux-hardening@vger.kernel.org, jpoimboe@redhat.com,
will@kernel.org, ardb@kernel.org,
Julien Thierry <jthierry@redhat.com>
Subject: [RFC PATCH 01/17] tools: Add some generic functions and headers
Date: Wed, 20 Jan 2021 18:37:44 +0100 [thread overview]
Message-ID: <20210120173800.1660730-2-jthierry@redhat.com> (raw)
In-Reply-To: <20210120173800.1660730-1-jthierry@redhat.com>
These will be needed to be able to use arm64 instruction decoder in
userland tools.
Signed-off-by: Julien Thierry <jthierry@redhat.com>
---
tools/include/asm-generic/bitops/__ffs.h | 11 +++++++
tools/include/linux/kernel.h | 21 +++++++++++++
tools/include/linux/printk.h | 40 ++++++++++++++++++++++++
3 files changed, 72 insertions(+)
create mode 100644 tools/include/linux/printk.h
diff --git a/tools/include/asm-generic/bitops/__ffs.h b/tools/include/asm-generic/bitops/__ffs.h
index 9d1310519497..963f8a22212f 100644
--- a/tools/include/asm-generic/bitops/__ffs.h
+++ b/tools/include/asm-generic/bitops/__ffs.h
@@ -42,4 +42,15 @@ static __always_inline unsigned long __ffs(unsigned long word)
return num;
}
+static inline unsigned long __ffs64(u64 word)
+{
+#if BITS_PER_LONG == 32
+ if (((u32)word) == 0UL)
+ return __ffs((u32)(word >> 32)) + 32;
+#elif BITS_PER_LONG != 64
+#error BITS_PER_LONG not 32 or 64
+#endif
+ return __ffs((unsigned long)word);
+}
+
#endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS___FFS_H_ */
diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index a7e54a08fb54..e748982ed5c1 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -114,6 +114,27 @@ int scnprintf_pad(char * buf, size_t size, const char * fmt, ...);
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
#define round_down(x, y) ((x) & ~__round_mask(x, y))
+/**
+ * upper_32_bits - return bits 32-63 of a number
+ * @n: the number we're accessing
+ *
+ * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
+ * the "right shift count >= width of type" warning when that quantity is
+ * 32-bits.
+ */
+#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
+
+/**
+ * lower_32_bits - return bits 0-31 of a number
+ * @n: the number we're accessing
+ */
+#define lower_32_bits(n) ((u32)(n))
+
+/* Inspired from ALIGN_*_KERNEL */
+#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
+#define __ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1)
+#define ALIGN_DOWN(x, a) __ALIGN((x) - ((a) - 1), (a))
+
#define current_gfp_context(k) 0
#define synchronize_rcu()
diff --git a/tools/include/linux/printk.h b/tools/include/linux/printk.h
new file mode 100644
index 000000000000..515ebdc47e6e
--- /dev/null
+++ b/tools/include/linux/printk.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_KERNEL_PRINTK_H_
+#define _TOOLS_LINUX_KERNEL_PRINTK_H_
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define printk(fmt, ...) fprintf(stdout, fmt, ##__VA_ARGS__)
+#define pr_info printk
+#define pr_notice printk
+#define pr_cont printk
+
+#define pr_warn(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
+#define pr_err pr_warn
+#define pr_alert pr_warn
+#define pr_emerg pr_warn
+#define pr_crit pr_warn
+
+/*
+ * Dummy printk for disabled debugging statements to use whilst maintaining
+ * gcc's format checking.
+ */
+#define no_printk(fmt, ...) \
+({ \
+ if (0) \
+ printk(fmt, ##__VA_ARGS__); \
+ 0; \
+})
+
+/* pr_devel() should produce zero code unless DEBUG is defined */
+#ifdef DEBUG
+#define pr_devel(fmt, ...) printk
+#else
+#define pr_devel(fmt, ...) no_printk
+#endif
+
+#define pr_debug pr_devel
+
+#endif /* _TOOLS_LINUX_KERNEL_PRINTK_H_ */
--
2.25.4
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next prev parent reply other threads:[~2021-01-20 17:42 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 17:37 [RFC PATCH 00/17] objtool: add base support for arm64 Julien Thierry
2021-01-20 17:37 ` Julien Thierry [this message]
2021-01-20 17:37 ` [RFC PATCH 02/17] tools: arm64: Make aarch64 instruction decoder available to tools Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 03/17] tools: bug: Remove duplicate definition Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 04/17] objtool: arm64: Add base definition for arm64 backend Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 05/17] objtool: arm64: Decode add/sub instructions Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 06/17] objtool: arm64: Decode jump and call related instructions Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 07/17] objtool: arm64: Decode other system instructions Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 08/17] objtool: arm64: Decode load/store instructions Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 09/17] objtool: arm64: Decode LDR instructions Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 10/17] objtool: arm64: Accept padding in code sections Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 11/17] efi: libstub: Ignore relocations for .discard sections Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 12/17] gcc-plugins: objtool: Add plugin to detect switch table on arm64 Julien Thierry
2021-01-27 22:15 ` Nick Desaulniers
2021-01-27 23:26 ` Josh Poimboeuf
2021-01-29 18:10 ` Nick Desaulniers
2021-02-01 21:44 ` Josh Poimboeuf
2021-02-01 23:17 ` Nick Desaulniers
2021-02-02 0:02 ` Josh Poimboeuf
2021-02-02 14:24 ` David Laight
2021-02-02 22:33 ` Nick Desaulniers
2021-02-02 23:36 ` Josh Poimboeuf
2021-02-02 23:52 ` Nick Desaulniers
2021-02-02 8:57 ` Julien Thierry
2021-02-02 23:01 ` Nick Desaulniers
2021-02-03 0:14 ` Josh Poimboeuf
2021-02-03 11:57 ` Peter Zijlstra
2021-02-03 13:04 ` Mark Brown
2021-02-03 13:58 ` Mark Rutland
2021-02-03 8:11 ` Julien Thierry
2021-02-09 16:30 ` Daniel Kiss
2021-01-20 17:37 ` [RFC PATCH 13/17] objtool: arm64: Implement functions to add switch tables alternatives Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 14/17] objtool: arm64: Cache section with switch table information Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 15/17] objtool: arm64: Handle supported relocations in alternatives Julien Thierry
2021-01-20 17:37 ` [RFC PATCH 16/17] objtool: arm64: Ignore replacement section for alternative callback Julien Thierry
2021-01-20 17:38 ` [RFC PATCH 17/17] objtool: arm64: Enable stack validation for arm64 Julien Thierry
2021-01-21 9:03 ` [RFC PATCH 00/17] objtool: add base support " Ard Biesheuvel
2021-01-21 10:26 ` Julien Thierry
2021-01-21 11:08 ` Ard Biesheuvel
2021-01-21 11:23 ` Peter Zijlstra
2021-01-21 11:48 ` Ard Biesheuvel
2021-01-21 18:54 ` Josh Poimboeuf
2021-01-22 17:43 ` Mark Brown
2021-01-22 17:54 ` Ard Biesheuvel
2021-01-28 22:10 ` Madhavan T. Venkataraman
2021-01-29 15:47 ` Mark Brown
2021-01-22 21:15 ` Madhavan T. Venkataraman
2021-01-22 21:43 ` Ard Biesheuvel
2021-01-22 21:44 ` Madhavan T. Venkataraman
2021-01-25 21:19 ` Josh Poimboeuf
2021-01-22 21:16 ` Madhavan T. Venkataraman
2021-01-21 13:23 ` Julien Thierry
2021-01-21 14:23 ` Mark Brown
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