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-rw-r--r--ext/libelf/gelf_phdr.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/ext/libelf/gelf_phdr.c b/ext/libelf/gelf_phdr.c
new file mode 100644
index 000000000..6125ec671
--- /dev/null
+++ b/ext/libelf/gelf_phdr.c
@@ -0,0 +1,175 @@
+/*-
+ * 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 "gelf.h"
+#include "libelf.h"
+
+#include "_libelf.h"
+
+Elf32_Phdr *
+elf32_getphdr(Elf *e)
+{
+ return (_libelf_getphdr(e, ELFCLASS32));
+}
+
+Elf64_Phdr *
+elf64_getphdr(Elf *e)
+{
+ return (_libelf_getphdr(e, ELFCLASS64));
+}
+
+GElf_Phdr *
+gelf_getphdr(Elf *e, int index, GElf_Phdr *d)
+{
+ int ec;
+ Elf32_Ehdr *eh32;
+ Elf64_Ehdr *eh64;
+ Elf32_Phdr *ep32;
+ Elf64_Phdr *ep64;
+
+ if (d == NULL || e == NULL ||
+ ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) ||
+ (e->e_kind != ELF_K_ELF) || index < 0) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (NULL);
+ }
+
+ if (ec == ELFCLASS32) {
+ if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL ||
+ ((ep32 = _libelf_getphdr(e, ELFCLASS32)) == NULL))
+ return (NULL);
+
+ if (index >= eh32->e_phnum) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (NULL);
+ }
+
+ ep32 += index;
+
+ d->p_type = ep32->p_type;
+ d->p_offset = ep32->p_offset;
+ d->p_vaddr = (Elf64_Addr) ep32->p_vaddr;
+ d->p_paddr = (Elf64_Addr) ep32->p_paddr;
+ d->p_filesz = (Elf64_Xword) ep32->p_filesz;
+ d->p_memsz = (Elf64_Xword) ep32->p_memsz;
+ d->p_flags = ep32->p_flags;
+ d->p_align = (Elf64_Xword) ep32->p_align;
+
+ } else {
+ if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL ||
+ (ep64 = _libelf_getphdr(e, ELFCLASS64)) == NULL)
+ return (NULL);
+
+ if (index >= eh64->e_phnum) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (NULL);
+ }
+
+ ep64 += index;
+
+ *d = *ep64;
+ }
+
+ return (d);
+}
+
+Elf32_Phdr *
+elf32_newphdr(Elf *e, size_t count)
+{
+ return (_libelf_newphdr(e, ELFCLASS32, count));
+}
+
+Elf64_Phdr *
+elf64_newphdr(Elf *e, size_t count)
+{
+ return (_libelf_newphdr(e, ELFCLASS64, count));
+}
+
+void *
+gelf_newphdr(Elf *e, size_t count)
+{
+ if (e == NULL) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (NULL);
+ }
+ return (_libelf_newphdr(e, e->e_class, count));
+}
+
+int
+gelf_update_phdr(Elf *e, int ndx, GElf_Phdr *s)
+{
+ int ec, phnum;
+ void *ehdr;
+ Elf32_Phdr *ph32;
+ Elf64_Phdr *ph64;
+
+ 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 == ELFCLASS32)
+ phnum = ((Elf32_Ehdr *) ehdr)->e_phnum;
+ else
+ phnum = ((Elf64_Ehdr *) ehdr)->e_phnum;
+
+ if (ndx < 0 || ndx > phnum) {
+ LIBELF_SET_ERROR(ARGUMENT, 0);
+ return (0);
+ }
+
+ if (ec == ELFCLASS64) {
+ ph64 = e->e_u.e_elf.e_phdr.e_phdr64 + ndx;
+ *ph64 = *s;
+ return (1);
+ }
+
+ ph32 = e->e_u.e_elf.e_phdr.e_phdr32 + ndx;
+
+ ph32->p_type = s->p_type;
+ ph32->p_flags = s->p_flags;
+ LIBELF_COPY_U32(ph32, s, p_offset);
+ LIBELF_COPY_U32(ph32, s, p_vaddr);
+ LIBELF_COPY_U32(ph32, s, p_paddr);
+ LIBELF_COPY_U32(ph32, s, p_filesz);
+ LIBELF_COPY_U32(ph32, s, p_memsz);
+ LIBELF_COPY_U32(ph32, s, p_align);
+
+ (void) elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY);
+
+ return (1);
+}