All of lore.kernel.org
 help / color / mirror / Atom feed
From: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
To: <rostedt@goodmis.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Matt Helsley <mhelsley@vmware.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Mark-PK Tsai <mark-pk.tsai@mediatek.com>, <peterz@infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>, <yj.chiang@mediatek.com>
Subject: [PATCH v2] recordmcount: Correct st_shndx handling
Date: Tue, 15 Jun 2021 14:47:20 +0800	[thread overview]
Message-ID: <20210615064720.21950-1-mark-pk.tsai@mediatek.com> (raw)

One should only use st_shndx when >SHN_UNDEF and <SHN_LORESERVE. When
SHN_XINDEX, then use .symtab_shndx. Otherwise use 0.

This handles the case: st_shndx >= SHN_LORESERVE && st_shndx != SHN_XINDEX.

Reported-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
---
 scripts/recordmcount.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index f9b19524da11..ef9c3425f86b 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -194,13 +194,18 @@ static unsigned int get_symindex(Elf_Sym const *sym, Elf32_Word const *symtab,
 	unsigned long offset;
 	int index;
 
-	if (sym->st_shndx != SHN_XINDEX)
+	if (w2(sym->st_shndx) > SHN_UNDEF &&
+	    w2(sym->st_shndx) < SHN_LORESERVE)
 		return w2(sym->st_shndx);
 
-	offset = (unsigned long)sym - (unsigned long)symtab;
-	index = offset / sizeof(*sym);
+	if (w2(sym->st_shndx) == SHN_XINDEX) {
+		offset = (unsigned long)sym - (unsigned long)symtab;
+		index = offset / sizeof(*sym);
 
-	return w(symtab_shndx[index]);
+		return w(symtab_shndx[index]);
+	}
+
+	return 0;
 }
 
 static unsigned int get_shnum(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)
-- 
2.18.0


WARNING: multiple messages have this Message-ID (diff)
From: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
To: <rostedt@goodmis.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Matt Helsley <mhelsley@vmware.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Mark-PK Tsai <mark-pk.tsai@mediatek.com>, <peterz@infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>, <yj.chiang@mediatek.com>
Subject: [PATCH v2] recordmcount: Correct st_shndx handling
Date: Tue, 15 Jun 2021 14:47:20 +0800	[thread overview]
Message-ID: <20210615064720.21950-1-mark-pk.tsai@mediatek.com> (raw)

One should only use st_shndx when >SHN_UNDEF and <SHN_LORESERVE. When
SHN_XINDEX, then use .symtab_shndx. Otherwise use 0.

This handles the case: st_shndx >= SHN_LORESERVE && st_shndx != SHN_XINDEX.

Reported-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
---
 scripts/recordmcount.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index f9b19524da11..ef9c3425f86b 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -194,13 +194,18 @@ static unsigned int get_symindex(Elf_Sym const *sym, Elf32_Word const *symtab,
 	unsigned long offset;
 	int index;
 
-	if (sym->st_shndx != SHN_XINDEX)
+	if (w2(sym->st_shndx) > SHN_UNDEF &&
+	    w2(sym->st_shndx) < SHN_LORESERVE)
 		return w2(sym->st_shndx);
 
-	offset = (unsigned long)sym - (unsigned long)symtab;
-	index = offset / sizeof(*sym);
+	if (w2(sym->st_shndx) == SHN_XINDEX) {
+		offset = (unsigned long)sym - (unsigned long)symtab;
+		index = offset / sizeof(*sym);
 
-	return w(symtab_shndx[index]);
+		return w(symtab_shndx[index]);
+	}
+
+	return 0;
 }
 
 static unsigned int get_shnum(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)
-- 
2.18.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
To: <rostedt@goodmis.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Matt Helsley <mhelsley@vmware.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Mark-PK Tsai <mark-pk.tsai@mediatek.com>, <peterz@infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>, <yj.chiang@mediatek.com>
Subject: [PATCH v2] recordmcount: Correct st_shndx handling
Date: Tue, 15 Jun 2021 14:47:20 +0800	[thread overview]
Message-ID: <20210615064720.21950-1-mark-pk.tsai@mediatek.com> (raw)

One should only use st_shndx when >SHN_UNDEF and <SHN_LORESERVE. When
SHN_XINDEX, then use .symtab_shndx. Otherwise use 0.

This handles the case: st_shndx >= SHN_LORESERVE && st_shndx != SHN_XINDEX.

Reported-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
---
 scripts/recordmcount.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index f9b19524da11..ef9c3425f86b 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -194,13 +194,18 @@ static unsigned int get_symindex(Elf_Sym const *sym, Elf32_Word const *symtab,
 	unsigned long offset;
 	int index;
 
-	if (sym->st_shndx != SHN_XINDEX)
+	if (w2(sym->st_shndx) > SHN_UNDEF &&
+	    w2(sym->st_shndx) < SHN_LORESERVE)
 		return w2(sym->st_shndx);
 
-	offset = (unsigned long)sym - (unsigned long)symtab;
-	index = offset / sizeof(*sym);
+	if (w2(sym->st_shndx) == SHN_XINDEX) {
+		offset = (unsigned long)sym - (unsigned long)symtab;
+		index = offset / sizeof(*sym);
 
-	return w(symtab_shndx[index]);
+		return w(symtab_shndx[index]);
+	}
+
+	return 0;
 }
 
 static unsigned int get_shnum(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)
-- 
2.18.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2021-06-15  6:47 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-15  6:47 Mark-PK Tsai [this message]
2021-06-15  6:47 ` [PATCH v2] recordmcount: Correct st_shndx handling Mark-PK Tsai
2021-06-15  6:47 ` Mark-PK Tsai
2021-06-15 15:42 ` Steven Rostedt
2021-06-15 15:42   ` Steven Rostedt
2021-06-15 15:42   ` Steven Rostedt
2021-06-15 16:32   ` Mark-PK Tsai
2021-06-15 16:32     ` Mark-PK Tsai
2021-06-15 16:32     ` Mark-PK Tsai
2021-06-15 17:07     ` Steven Rostedt
2021-06-15 17:07       ` Steven Rostedt
2021-06-15 17:07       ` Steven Rostedt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210615064720.21950-1-mark-pk.tsai@mediatek.com \
    --to=mark-pk.tsai@mediatek.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=matthias.bgg@gmail.com \
    --cc=mhelsley@vmware.com \
    --cc=peterz@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=samitolvanen@google.com \
    --cc=yj.chiang@mediatek.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.