From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/tools/perf/util/dwarf-aux.c | 109 ++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 85 insertions(+), 24 deletions(-)
diff --git a/kernel/tools/perf/util/dwarf-aux.c b/kernel/tools/perf/util/dwarf-aux.c
index 230e94b..4343356 100644
--- a/kernel/tools/perf/util/dwarf-aux.c
+++ b/kernel/tools/perf/util/dwarf-aux.c
@@ -1,28 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* dwarf-aux.c : libdw auxiliary interfaces
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
*/
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
-#include "util.h"
+#include <stdlib.h>
#include "debug.h"
#include "dwarf-aux.h"
+#include "strbuf.h"
#include "string2.h"
/**
@@ -72,6 +59,51 @@
return dwarf_formstring(&attr);
}
+/* Unlike dwarf_getsrc_die(), cu_getsrc_die() only returns statement line */
+static Dwarf_Line *cu_getsrc_die(Dwarf_Die *cu_die, Dwarf_Addr addr)
+{
+ Dwarf_Addr laddr;
+ Dwarf_Lines *lines;
+ Dwarf_Line *line;
+ size_t nlines, l, u, n;
+ bool flag;
+
+ if (dwarf_getsrclines(cu_die, &lines, &nlines) != 0 ||
+ nlines == 0)
+ return NULL;
+
+ /* Lines are sorted by address, use binary search */
+ l = 0; u = nlines - 1;
+ while (l < u) {
+ n = u - (u - l) / 2;
+ line = dwarf_onesrcline(lines, n);
+ if (!line || dwarf_lineaddr(line, &laddr) != 0)
+ return NULL;
+ if (addr < laddr)
+ u = n - 1;
+ else
+ l = n;
+ }
+ /* Going backward to find the lowest line */
+ do {
+ line = dwarf_onesrcline(lines, --l);
+ if (!line || dwarf_lineaddr(line, &laddr) != 0)
+ return NULL;
+ } while (laddr == addr);
+ l++;
+ /* Going foward to find the statement line */
+ do {
+ line = dwarf_onesrcline(lines, l++);
+ if (!line || dwarf_lineaddr(line, &laddr) != 0 ||
+ dwarf_linebeginstatement(line, &flag) != 0)
+ return NULL;
+ if (laddr > addr)
+ return NULL;
+ } while (!flag);
+
+ return line;
+}
+
/**
* cu_find_lineinfo - Get a line number and file name for given address
* @cu_die: a CU DIE
@@ -85,17 +117,26 @@
const char **fname, int *lineno)
{
Dwarf_Line *line;
- Dwarf_Addr laddr;
+ Dwarf_Die die_mem;
+ Dwarf_Addr faddr;
- line = dwarf_getsrc_die(cu_die, (Dwarf_Addr)addr);
- if (line && dwarf_lineaddr(line, &laddr) == 0 &&
- addr == (unsigned long)laddr && dwarf_lineno(line, lineno) == 0) {
+ if (die_find_realfunc(cu_die, (Dwarf_Addr)addr, &die_mem)
+ && die_entrypc(&die_mem, &faddr) == 0 &&
+ faddr == addr) {
+ *fname = dwarf_decl_file(&die_mem);
+ dwarf_decl_line(&die_mem, lineno);
+ goto out;
+ }
+
+ line = cu_getsrc_die(cu_die, (Dwarf_Addr)addr);
+ if (line && dwarf_lineno(line, lineno) == 0) {
*fname = dwarf_linesrc(line, NULL, NULL);
if (!*fname)
/* line number is useless without filename */
*lineno = 0;
}
+out:
return *lineno ?: -ENOENT;
}
@@ -315,9 +356,25 @@
bool die_is_func_def(Dwarf_Die *dw_die)
{
Dwarf_Attribute attr;
+ Dwarf_Addr addr = 0;
- return (dwarf_tag(dw_die) == DW_TAG_subprogram &&
- dwarf_attr(dw_die, DW_AT_declaration, &attr) == NULL);
+ if (dwarf_tag(dw_die) != DW_TAG_subprogram)
+ return false;
+
+ if (dwarf_attr(dw_die, DW_AT_declaration, &attr))
+ return false;
+
+ /*
+ * DW_AT_declaration can be lost from function declaration
+ * by gcc's bug #97060.
+ * So we need to check this subprogram DIE has DW_AT_inline
+ * or an entry address.
+ */
+ if (!dwarf_attr(dw_die, DW_AT_inline, &attr) &&
+ die_entrypc(dw_die, &addr) < 0)
+ return false;
+
+ return true;
}
/**
@@ -918,9 +975,13 @@
if ((tag == DW_TAG_formal_parameter ||
tag == DW_TAG_variable) &&
die_compare_name(die_mem, fvp->name) &&
- /* Does the DIE have location information or external instance? */
+ /*
+ * Does the DIE have location information or const value
+ * or external instance?
+ */
(dwarf_attr(die_mem, DW_AT_external, &attr) ||
- dwarf_attr(die_mem, DW_AT_location, &attr)))
+ dwarf_attr(die_mem, DW_AT_location, &attr) ||
+ dwarf_attr(die_mem, DW_AT_const_value, &attr)))
return DIE_FIND_CB_END;
if (dwarf_haspc(die_mem, fvp->addr))
return DIE_FIND_CB_CONTINUE;
--
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