Get rid of GNU libelf and its autoconf nastiness and replace

it with FreeBSD's implementation

--HG--
extra : convert_revision : ef9c4551b9a6b54b76a89f286ff9804c55790621

1 files changed, 128 insertions, 0 deletions

diff --git a/ext/libelf/gelf_shdr.c b/ext/libelf/gelf_shdr.c
new file mode 100644
index 000000000..16d6434f3
--- /dev/null
+++ b/ext/libelf/gelf_shdr.c
@@ -0,0 +1,128 @@
+/*-
+ * 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 "_libelf.h"
+
+Elf32_Shdr *
+elf32_getshdr(Elf_Scn *s)
+{
+        return (_libelf_getshdr(s, ELFCLASS32));
+}
+
+Elf64_Shdr *
+elf64_getshdr(Elf_Scn *s)
+{
+        return (_libelf_getshdr(s, ELFCLASS64));
+}
+
+GElf_Shdr *
+gelf_getshdr(Elf_Scn *s, GElf_Shdr *d)
+{
+        int ec;
+        void *sh;
+        Elf32_Shdr *sh32;
+        Elf64_Shdr *sh64;
+
+        if (d == NULL) {
+                LIBELF_SET_ERROR(ARGUMENT, 0);
+                return (NULL);
+        }
+
+        if ((sh = _libelf_getshdr(s, ELFCLASSNONE)) == NULL)
+                return (NULL);
+
+        ec = s->s_elf->e_class;
+        assert(ec == ELFCLASS32 || ec == ELFCLASS64);
+
+        if (ec == ELFCLASS32) {
+                sh32 = (Elf32_Shdr *) sh;
+
+                d->sh_name      = sh32->sh_name;
+                d->sh_type      = sh32->sh_type;
+                d->sh_flags     = (Elf64_Xword) sh32->sh_flags;
+                d->sh_addr      = (Elf64_Addr) sh32->sh_addr;
+                d->sh_offset    = (Elf64_Off) sh32->sh_offset;
+                d->sh_size      = (Elf64_Xword) sh32->sh_size;
+                d->sh_link      = sh32->sh_link;
+                d->sh_info      = sh32->sh_info;
+                d->sh_addralign = (Elf64_Xword) sh32->sh_addralign;
+                d->sh_entsize   = (Elf64_Xword) sh32->sh_entsize;
+        } else {
+                sh64 = (Elf64_Shdr *) sh;
+                *d = *sh64;
+        }
+
+        return (d);
+}
+
+int
+gelf_update_shdr(Elf_Scn *scn, GElf_Shdr *s)
+{
+        int ec;
+        Elf *e;
+        Elf32_Shdr *sh32;
+
+
+        if (s == NULL || scn == NULL || (e = scn->s_elf) == 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 (ec == ELFCLASS64) {
+                scn->s_shdr.s_shdr64 = *s;
+                return (1);
+        }
+
+        sh32 = &scn->s_shdr.s_shdr32;
+
+        sh32->sh_name	 =  s->sh_name;
+        sh32->sh_type	 =  s->sh_type;
+        LIBELF_COPY_U32(sh32, s, sh_flags);
+        LIBELF_COPY_U32(sh32, s, sh_addr);
+        LIBELF_COPY_U32(sh32, s, sh_offset);
+        LIBELF_COPY_U32(sh32, s, sh_size);
+        sh32->sh_link	 =  s->sh_link;
+        sh32->sh_info	 =  s->sh_info;
+        LIBELF_COPY_U32(sh32, s, sh_addralign);
+        LIBELF_COPY_U32(sh32, s, sh_entsize);
+
+        (void) elf_flagscn(scn, ELF_C_SET, ELF_F_DIRTY);
+
+        return (1);
+}