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
next prev 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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