Get rid of GNU libelf and its autoconf nastiness and replace

it with FreeBSD's implementation

--HG--
extra : convert_revision : ef9c4551b9a6b54b76a89f286ff9804c55790621

1 files changed, 164 insertions, 0 deletions

diff --git a/ext/libelf/gelf_ehdr.c b/ext/libelf/gelf_ehdr.c
new file mode 100644
index 000000000..c410f4a15
--- /dev/null
+++ b/ext/libelf/gelf_ehdr.c
@@ -0,0 +1,164 @@
+/*-
+ * 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 <limits.h>
+
+#include <assert.h>
+#include "gelf.h"
+#include "libelf.h"
+#include <string.h>
+
+#include "_libelf.h"
+
+Elf32_Ehdr *
+elf32_getehdr(Elf *e)
+{
+        return (_libelf_ehdr(e, ELFCLASS32, 0));
+}
+
+Elf64_Ehdr *
+elf64_getehdr(Elf *e)
+{
+        return (_libelf_ehdr(e, ELFCLASS64, 0));
+}
+
+GElf_Ehdr *
+gelf_getehdr(Elf *e, GElf_Ehdr *d)
+{
+        int ec;
+        Elf32_Ehdr *eh32;
+        Elf64_Ehdr *eh64;
+
+        if (d == NULL || e == NULL ||
+            ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
+                LIBELF_SET_ERROR(ARGUMENT, 0);
+                return (NULL);
+        }
+
+        if (ec == ELFCLASS32) {
+                if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL)
+                        return (NULL);
+
+                (void) memcpy(d->e_ident, eh32->e_ident, sizeof(eh32->e_ident));
+                d->e_type		= eh32->e_type;
+                d->e_machine		= eh32->e_machine;
+                d->e_version		= eh32->e_version;
+                d->e_entry		= eh32->e_entry;
+                d->e_phoff		= eh32->e_phoff;
+                d->e_shoff		= eh32->e_shoff;
+                d->e_flags		= eh32->e_flags;
+                d->e_ehsize		= eh32->e_ehsize;
+                d->e_phentsize		= eh32->e_phentsize;
+                d->e_phnum		= eh32->e_phnum;
+                d->e_shentsize		= eh32->e_shentsize;
+                d->e_shnum		= eh32->e_shnum;
+                d->e_shstrndx		= eh32->e_shstrndx;
+
+                return (d);
+        }
+
+        assert(ec == ELFCLASS64);
+
+        if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL)
+                return (NULL);
+        *d = *eh64;
+
+        return (d);
+}
+
+Elf32_Ehdr *
+elf32_newehdr(Elf *e)
+{
+        return (_libelf_ehdr(e, ELFCLASS32, 1));
+}
+
+Elf64_Ehdr *
+elf64_newehdr(Elf *e)
+{
+        return (_libelf_ehdr(e, ELFCLASS64, 1));
+}
+
+void *
+gelf_newehdr(Elf *e, int ec)
+{
+        if (e != NULL &&
+            (ec == ELFCLASS32 || ec == ELFCLASS64))
+                return (_libelf_ehdr(e, ec, 1));
+
+        LIBELF_SET_ERROR(ARGUMENT, 0);
+        return (NULL);
+}
+
+int
+gelf_update_ehdr(Elf *e, GElf_Ehdr *s)
+{
+        int ec;
+        void *ehdr;
+        Elf32_Ehdr *eh32;
+        Elf64_Ehdr *eh64;
+
+        if (s== NULL || e == NULL || e->e_kind != ELF_K_ELF ||
+            ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
+                LIBELF_SET_ERROR(ARGUMENT, 0);
+                return (0);
+        }
+
+        if (e->e_cmd == ELF_C_READ) {
+                LIBELF_SET_ERROR(MODE, 0);
+                return (0);
+        }
+
+        if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
+                return (0);
+
+        if (ec == ELFCLASS64) {
+                eh64 = (Elf64_Ehdr *) ehdr;
+                *eh64 = *s;
+                return (1);
+        }
+
+        eh32 = (Elf32_Ehdr *) ehdr;
+
+        (void) memcpy(eh32->e_ident, s->e_ident, sizeof(eh32->e_ident));
+
+        eh32->e_type      = s->e_type;
+        eh32->e_machine   = s->e_machine;
+        eh32->e_version   = s->e_version;
+        LIBELF_COPY_U32(eh32, s, e_entry);
+        LIBELF_COPY_U32(eh32, s, e_phoff);
+        LIBELF_COPY_U32(eh32, s, e_shoff);
+        eh32->e_flags     = s->e_flags;
+        eh32->e_ehsize    = s->e_ehsize;
+        eh32->e_phentsize = s->e_phentsize;
+        eh32->e_phnum     = s->e_phnum;
+        eh32->e_shentsize = s->e_shentsize;
+        eh32->e_shnum     = s->e_shnum;
+        eh32->e_shstrndx  = s->e_shstrndx;
+
+        (void) elf_flagehdr(e, ELF_C_SET, ELF_F_DIRTY);
+
+        return (1);
+}