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From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Mark Wielaard <mark@klomp.org>
Cc: elfutils-devel@sourceware.org, Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH v2 3/7] readelf: Fix set but not used parameter
Date: Wed,  8 Feb 2023 20:52:22 +0100	[thread overview]
Message-ID: <20230208195226.144143-4-iii@linux.ibm.com> (raw)
In-Reply-To: <20230208195226.144143-1-iii@linux.ibm.com>

clang complains:

    readelf.c:12205:72: error: parameter 'desc' set but not used [-Werror,-Wunused-but-set-parameter]
    handle_bit_registers (const Ebl_Register_Location *regloc, const void *desc,
                                                                           ^

Mark Wielaard says:

    It is never really used since as far as I can see we don't have any
    backend with a core register sets where a register doesn't have a
    number of bits which isn't a multiple of 8 (only ia64 has some 1
    bit registers, but those don't seem part of the core register set).

    If we do accidentally try to handle such a register having an abort
    is also not very nice. Lets just warn and return/continue.

https://sourceware.org/bugzilla/show_bug.cgi?id=30084

Co-developed-by: Mark Wielaard <mark@klomp.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 src/readelf.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/src/readelf.c b/src/readelf.c
index 0bbd708e..5b3319c2 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -12199,24 +12199,17 @@ handle_core_items (Elf *core, const void *desc, size_t descsz,
   return colno;
 }
 
-static unsigned int
-handle_bit_registers (const Ebl_Register_Location *regloc, const void *desc,
-		      unsigned int colno)
-{
-  desc += regloc->offset;
-
-  abort ();			/* XXX */
-  return colno;
-}
-
-
 static unsigned int
 handle_core_register (Ebl *ebl, Elf *core, int maxregname,
 		      const Ebl_Register_Location *regloc, const void *desc,
 		      unsigned int colno)
 {
   if (regloc->bits % 8 != 0)
-    return handle_bit_registers (regloc, desc, colno);
+    {
+      error (0, 0, "Warning: Cannot handle register with %" PRIu8 "bits\n",
+	     regloc->bits);
+      return colno;
+    }
 
   desc += regloc->offset;
 
-- 
2.39.1


  parent reply	other threads:[~2023-02-08 19:52 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-08 19:52 [PATCH v2 0/7] Add Memory Sanitizer support Ilya Leoshkevich
2023-02-08 19:52 ` [PATCH v2 1/7] libasm: Fix xdefault_pattern initialization Ilya Leoshkevich
2023-02-09 13:14   ` Mark Wielaard
2023-02-08 19:52 ` [PATCH v2 2/7] printversion: Fix unused variable Ilya Leoshkevich
2023-02-08 19:52 ` Ilya Leoshkevich [this message]
2023-02-09 13:17   ` [PATCH v2 3/7] readelf: Fix set but not used parameter Mark Wielaard
2023-02-08 19:52 ` [PATCH v2 4/7] x86_64_return_value_location: Support lvalue and rvalue references Ilya Leoshkevich
2023-02-09 13:45   ` Mark Wielaard
2023-02-10  1:20     ` Ilya Leoshkevich
2023-02-10 16:22       ` Frank Ch. Eigler
2023-02-08 19:52 ` [PATCH v2 5/7] configure: Use -fno-addrsig if possible Ilya Leoshkevich
2023-02-09 13:28   ` Mark Wielaard
2023-02-08 19:52 ` [PATCH v2 6/7] configure: Add --disable-demangler Ilya Leoshkevich
2023-02-09 13:40   ` Mark Wielaard
2023-02-08 19:52 ` [PATCH v2 7/7] configure: Add --enable-sanitize-memory Ilya Leoshkevich

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