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From: Zhen Lei <thunder.leizhen@huawei.com>
To: Josh Poimboeuf <jpoimboe@kernel.org>,
	Jiri Kosina <jikos@kernel.org>, Miroslav Benes <mbenes@suse.cz>,
	Petr Mladek <pmladek@suse.com>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	<live-patching@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Luis Chamberlain" <mcgrof@kernel.org>,
	<linux-modules@vger.kernel.org>,
	"Steven Rostedt" <rostedt@goodmis.org>,
	Ingo Molnar <mingo@redhat.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Subject: [PATCH v7 03/11] scripts/kallsyms: remove helper sym_name() and cleanup
Date: Mon, 17 Oct 2022 14:49:42 +0800	[thread overview]
Message-ID: <20221017064950.2038-4-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20221017064950.2038-1-thunder.leizhen@huawei.com>

Now, the type and name of a symbol are no longer stored together. So the
helper sym_name() is no longer needed. Correspondingly, replacing the
field name 'sym[]' with 'name[]' is more accurate.

Suggested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
 scripts/kallsyms.c | 29 ++++++++++++-----------------
 1 file changed, 12 insertions(+), 17 deletions(-)

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index d3aae0491b3e963..60686094f665164 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -52,7 +52,7 @@ struct sym_entry {
 	unsigned int start_pos;
 	unsigned int percpu_absolute;
 	unsigned char type;
-	unsigned char sym[];
+	unsigned char name[];
 };
 
 struct addr_range {
@@ -93,11 +93,6 @@ static void usage(void)
 	exit(1);
 }
 
-static char *sym_name(const struct sym_entry *s)
-{
-	return (char *)s->sym;
-}
-
 static bool is_ignored_symbol(const char *name, char type)
 {
 	/* Symbol names that exactly match to the following are ignored.*/
@@ -253,7 +248,7 @@ static struct sym_entry *read_symbol(FILE *in)
 	sym->addr = addr;
 	sym->len = len;
 	sym->type = type;
-	strcpy(sym_name(sym), name);
+	strcpy((char *)sym->name, name);
 	sym->percpu_absolute = 0;
 
 	return sym;
@@ -277,7 +272,7 @@ static int symbol_in_range(const struct sym_entry *s,
 
 static int symbol_valid(const struct sym_entry *s)
 {
-	const char *name = sym_name(s);
+	const char *name = (char *)s->name;
 
 	/* if --all-symbols is not specified, then symbols outside the text
 	 * and inittext sections are discarded */
@@ -527,7 +522,7 @@ static void write_src(void)
 		}
 		printf(", 0x%02x", table[i]->type);
 		for (k = 0; k < table[i]->len - 1; k++)
-			printf(", 0x%02x", table[i]->sym[k]);
+			printf(", 0x%02x", table[i]->name[k]);
 		printf("\n");
 	}
 	printf("\n");
@@ -582,7 +577,7 @@ static void build_initial_token_table(void)
 	unsigned int i;
 
 	for (i = 0; i < table_cnt; i++)
-		learn_symbol(table[i]->sym, table[i]->len);
+		learn_symbol(table[i]->name, table[i]->len);
 }
 
 static unsigned char *find_token(unsigned char *str, int len,
@@ -607,14 +602,14 @@ static void compress_symbols(const unsigned char *str, int idx)
 	for (i = 0; i < table_cnt; i++) {
 
 		len = table[i]->len;
-		p1 = table[i]->sym;
+		p1 = table[i]->name;
 
 		/* find the token on the symbol */
 		p2 = find_token(p1, len, str);
 		if (!p2) continue;
 
 		/* decrease the counts for this symbol's tokens */
-		forget_symbol(table[i]->sym, len);
+		forget_symbol(table[i]->name, len);
 
 		size = len;
 
@@ -636,7 +631,7 @@ static void compress_symbols(const unsigned char *str, int idx)
 		table[i]->len = len;
 
 		/* increase the counts for this symbol's new tokens */
-		learn_symbol(table[i]->sym, len);
+		learn_symbol(table[i]->name, len);
 	}
 }
 
@@ -694,7 +689,7 @@ static void insert_real_symbols_in_table(void)
 
 	for (i = 0; i < table_cnt; i++) {
 		for (j = 0; j < table[i]->len; j++) {
-			c = table[i]->sym[j];
+			c = table[i]->name[j];
 			best_table[c][0] = c;
 			best_table_len[c] = 1;
 		}
@@ -716,7 +711,7 @@ static void optimize_token_table(void)
 /* guess for "linker script provide" symbol */
 static int may_be_linker_script_provide_symbol(const struct sym_entry *se)
 {
-	const char *symbol = sym_name(se);
+	const char *symbol = (char *)se->name;
 	int len = se->len;
 
 	if (len < 8)
@@ -773,8 +768,8 @@ static int compare_symbols(const void *a, const void *b)
 		return wa - wb;
 
 	/* sort by the number of prefix underscores */
-	wa = strspn(sym_name(sa), "_");
-	wb = strspn(sym_name(sb), "_");
+	wa = strspn((char *)sa->name, "_");
+	wb = strspn((char *)sb->name, "_");
 	if (wa != wb)
 		return wa - wb;
 
-- 
2.25.1


  parent reply	other threads:[~2022-10-17  6:51 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-17  6:49 [PATCH v7 00/11] kallsyms: Optimizes the performance of lookup symbols Zhen Lei
2022-10-17  6:49 ` [PATCH v7 01/11] scripts/kallsyms: rename build_initial_tok_table() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 02/11] scripts/kallsyms: don't compress symbol types Zhen Lei
2022-10-17  6:49 ` Zhen Lei [this message]
2022-10-17  6:49 ` [PATCH v7 04/11] kallsyms: Add helper kallsyms_compress_symbol_name() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 05/11] kallsyms: Improve the performance of kallsyms_lookup_name() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 06/11] kallsyms: Improve the performance of kallsyms_lookup_name() when CONFIG_LTO_CLANG=y Zhen Lei
2022-10-17  6:49 ` [PATCH v7 07/11] kallsyms: Add helper kallsyms_on_each_match_symbol() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 08/11] livepatch: Use kallsyms_on_each_match_symbol() to improve performance Zhen Lei
2022-10-17  6:49 ` [PATCH v7 09/11] livepatch: Improve the search performance of module_kallsyms_on_each_symbol() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 10/11] kallsyms: Delete an unused parameter related to kallsyms_on_each_symbol() Zhen Lei
2022-10-17  6:49 ` [PATCH v7 11/11] kallsyms: Add self-test facility Zhen Lei
2022-10-18  8:21   ` kernel test robot
2022-10-18  9:11     ` Leizhen (ThunderTown)
     [not found]   ` <202210181740.PAAHM5dR-lkp@intel.com>
2022-10-19  8:39     ` Leizhen (ThunderTown)
2022-10-21  2:00   ` kernel test robot
2022-10-19 12:01 ` [PATCH v7 00/11] kallsyms: Optimizes the performance of lookup symbols Luis Chamberlain
2022-10-19 14:11   ` Leizhen (ThunderTown)
2022-10-25 17:53     ` Luis Chamberlain
2022-10-26  6:44       ` Leizhen (ThunderTown)
2022-10-26 19:03         ` Luis Chamberlain
2022-10-27  3:26           ` Leizhen (ThunderTown)
2022-10-27  6:27             ` Leizhen (ThunderTown)
2022-10-29  8:10               ` Leizhen (ThunderTown)
2022-10-29 12:49                 ` David Laight
2022-10-31  2:55                   ` Leizhen (ThunderTown)
2022-10-31  4:55                 ` Leizhen (ThunderTown)
2022-10-31 15:04                   ` Leizhen (ThunderTown)
2022-11-02  9:18                     ` Leizhen (ThunderTown)

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