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-rw-r--r--ext/libelf/elf_errmsg.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/ext/libelf/elf_errmsg.c b/ext/libelf/elf_errmsg.c
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+++ b/ext/libelf/elf_errmsg.c
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+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+#include <string.h>
+
+#include "_libelf.h"
+#include "libelf.h"
+
+/*
+ * Retrieve a human readable translation for an error message.
+ */
+
+const char *_libelf_errors[] = {
+#define DEFINE_ERROR(N,S) [ELF_E_##N] = S
+ DEFINE_ERROR(NONE, "No Error"),
+ DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"),
+ DEFINE_ERROR(ARGUMENT, "Invalid argument"),
+ DEFINE_ERROR(CLASS, "ELF class mismatch"),
+ DEFINE_ERROR(DATA, "Invalid data buffer descriptor"),
+ DEFINE_ERROR(HEADER, "Missing or malformed ELF header"),
+ DEFINE_ERROR(IO, "I/O error"),
+ DEFINE_ERROR(LAYOUT, "Layout constraint violation"),
+ DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"),
+ DEFINE_ERROR(RANGE, "Value out of range of target"),
+ DEFINE_ERROR(RESOURCE, "Resource exhaustion"),
+ DEFINE_ERROR(SECTION, "Invalid section descriptor"),
+ DEFINE_ERROR(SEQUENCE, "API calls out of sequence"),
+ DEFINE_ERROR(UNIMPL, "Unimplemented feature"),
+ DEFINE_ERROR(VERSION, "Unknown ELF API version"),
+ DEFINE_ERROR(NUM, "Unknown error")
+#undef DEFINE_ERROR
+};
+
+const char *
+elf_errmsg(int error)
+{
+ int oserr;
+
+ if (error == 0 && (error = LIBELF_PRIVATE(error)) == 0)
+ return NULL;
+ else if (error == -1)
+ error = LIBELF_PRIVATE(error);
+
+ oserr = error >> LIBELF_OS_ERROR_SHIFT;
+ error &= LIBELF_ELF_ERROR_MASK;
+
+ if (error < 0 || error >= ELF_E_NUM)
+ return _libelf_errors[ELF_E_NUM];
+ if (oserr) {
+ strlcpy(LIBELF_PRIVATE(msg), _libelf_errors[error],
+ sizeof(LIBELF_PRIVATE(msg)));
+ strlcat(LIBELF_PRIVATE(msg), ": ", sizeof(LIBELF_PRIVATE(msg)));
+ strlcat(LIBELF_PRIVATE(msg), strerror(oserr),
+ sizeof(LIBELF_PRIVATE(msg)));
+ return (const char *)&LIBELF_PRIVATE(msg);
+ }
+ return _libelf_errors[error];
+}