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-rw-r--r--ext/libelf/elf_flag.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/ext/libelf/elf_flag.c b/ext/libelf/elf_flag.c
new file mode 100644
index 000000000..234964b07
--- /dev/null
+++ b/ext/libelf/elf_flag.c
@@ -0,0 +1,162 @@
+/*-
+ * 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 "libelf.h"
+
+#include "_libelf.h"
+
+unsigned int
+elf_flagdata(Elf_Data *d, Elf_Cmd c, unsigned int flags)
+{
+ Elf *e;
+ Elf_Scn *scn;
+ unsigned int r;
+
+ if (d == NULL)
+ return (0);
+
+ if ((c != ELF_C_SET && c != ELF_C_CLR) || (scn = d->d_scn) == NULL ||
+ (e = scn->s_elf) == NULL || e->e_kind != ELF_K_ELF ||
+ (flags & ~ELF_F_DIRTY) != 0) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (c == ELF_C_SET)
+ r = scn->s_flags |= flags;
+ else
+ r = scn->s_flags &= ~flags;
+
+ return (r);
+}
+
+unsigned int
+elf_flagehdr(Elf *e, Elf_Cmd c, unsigned int flags)
+{
+ int ec;
+ void *ehdr;
+
+ if (e == NULL)
+ return (0);
+
+ if ((c != ELF_C_SET && c != ELF_C_CLR) ||
+ (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 ||
+ ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (ec == ELFCLASS32)
+ ehdr = e->e_u.e_elf.e_ehdr.e_ehdr32;
+ else
+ ehdr = e->e_u.e_elf.e_ehdr.e_ehdr64;
+
+ if (ehdr == NULL) {
+ LIBELF_SET_ERROR(SEQUENCE, 0);
+ return (0);
+ }
+
+ return (elf_flagelf(e, c, flags));
+}
+
+unsigned int
+elf_flagelf(Elf *e, Elf_Cmd c, unsigned int flags)
+{
+ int r;
+
+ if (e == NULL)
+ return (0);
+
+ if ((c != ELF_C_SET && c != ELF_C_CLR) ||
+ (e->e_kind != ELF_K_ELF) ||
+ (flags & ~(ELF_F_DIRTY|ELF_F_LAYOUT)) != 0) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (c == ELF_C_SET)
+ r = e->e_flags |= flags;
+ else
+ r = e->e_flags &= ~flags;
+ return (r);
+}
+
+unsigned int
+elf_flagphdr(Elf *e, Elf_Cmd c, unsigned int flags)
+{
+ int ec;
+ void *phdr;
+
+ if (e == NULL)
+ return (0);
+
+ if ((c != ELF_C_SET && c != ELF_C_CLR) ||
+ (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 ||
+ ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (ec == ELFCLASS32)
+ phdr = e->e_u.e_elf.e_phdr.e_phdr32;
+ else
+ phdr = e->e_u.e_elf.e_phdr.e_phdr64;
+
+ if (phdr == NULL) {
+ LIBELF_SET_ERROR(SEQUENCE, 0);
+ return (0);
+ }
+
+ return (elf_flagelf(e, c, flags));
+}
+
+unsigned int
+elf_flagscn(Elf_Scn *s, Elf_Cmd c, unsigned int flags)
+{
+ int r;
+
+ if (s == NULL)
+ return (0);
+
+ if ((c != ELF_C_SET && c != ELF_C_CLR) ||
+ (flags & ~ELF_F_DIRTY) != 0) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (c == ELF_C_SET)
+ r = s->s_flags |= flags;
+ else
+ r = s->s_flags &= ~flags;
+ return (r);
+}
+
+unsigned int
+elf_flagshdr(Elf_Scn *s, Elf_Cmd c, unsigned int flags)
+{
+ return (elf_flagscn(s, c, flags));
+}