1 files changed, 78 insertions, 0 deletions
diff --git a/libdwfl/offline.c b/libdwfl/offline.c
new file mode 100644
index 00000000..05496399
--- /dev/null
+++ b/libdwfl/offline.c
@@ -0,0 +1,78 @@
+/* Recover relocatibility for addresses computed from debug information.
+   Copyright (C) 2005 Red Hat, Inc.
+
+   This program is Open Source software; you can redistribute it and/or
+   modify it under the terms of the Open Software License version 1.0 as
+   published by the Open Source Initiative.
+
+   You should have received a copy of the Open Software License along
+   with this program; if not, you may obtain a copy of the Open Software
+   License version 1.0 from http://www.opensource.org/licenses/osl.php or
+   by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
+   3001 King Ranch Road, Ukiah, CA 95482.   */
+
+#include "libdwflP.h"
+#include <unistd.h>
+
+/* Since dwfl_report_elf lays out the sections already, this will only be
+   called when the section headers of the debuginfo file are being
+   consulted instead.  With binutils strip-to-debug, the symbol table
+   is in the debuginfo file and relocation looks there.  */
+int
+dwfl_offline_section_address (Dwfl_Module *mod,
+			      void **userdata __attribute__ ((unused)),
+			      const char *modname __attribute__ ((unused)),
+			      Dwarf_Addr base __attribute__ ((unused)),
+			      const char *secname __attribute__ ((unused)),
+			      Elf32_Word shndx,
+			      const GElf_Shdr *shdr __attribute__ ((unused)),
+			      Dwarf_Addr *addr)
+{
+  assert (mod->symfile != &mod->main);
+
+  GElf_Shdr shdr_mem;
+  GElf_Shdr *main_shdr = gelf_getshdr (elf_getscn (mod->main.elf, shndx),
+				       &shdr_mem);
+  if (unlikely (main_shdr == NULL))
+    return -1;
+
+  assert (shdr->sh_addr == 0);
+  assert (shdr->sh_flags & SHF_ALLOC);
+  assert (main_shdr->sh_addr != 0);
+  assert (main_shdr->sh_flags == shdr->sh_flags);
+
+  *addr = main_shdr->sh_addr;
+  return 0;
+}
+INTDEF (dwfl_offline_section_address)
+
+Dwfl_Module *
+dwfl_report_offline (Dwfl *dwfl, const char *name,
+		     const char *file_name, int fd)
+{
+  if (dwfl == NULL)
+    return NULL;
+
+  Dwfl_Module *mod = INTUSE(dwfl_report_elf) (dwfl, name, file_name, fd,
+					      dwfl->offline_next_address);
+  if (mod != NULL)
+    {
+      /* If this is an ET_EXEC file with fixed addresses, the address range
+	 it consumed may or may not intersect with the arbitrary range we
+	 will use for relocatable modules.  Make sure we always use a free
+	 range for the offline allocations.  */
+      if (dwfl->offline_next_address >= mod->low_addr
+	  && dwfl->offline_next_address < mod->high_addr + OFFLINE_REDZONE)
+	dwfl->offline_next_address = mod->high_addr + OFFLINE_REDZONE;
+
+      /* Don't keep the file descriptor around.  */
+      if (mod->main.fd != -1 && elf_cntl (mod->main.elf, ELF_C_FDREAD) == 0)
+	{
+	  close (mod->main.fd);
+	  mod->main.fd = -1;
+	}
+    }
+
+  return mod;
+}
+INTDEF (dwfl_report_offline)