/* Handle TIC6X (DSBT) shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2010-2021 Free Software Foundation, Inc.
+ Copyright (C) 2010-2022 Free Software Foundation, Inc.
This file is part of GDB.
static void dsbt_relocate_main_executable (void);
static int enable_break (void);
-/* Scan for DYNTAG in .dynamic section of ABFD. If DYNTAG is found 1 is
- returned and the corresponding PTR is set. */
-
-static int
-scan_dyntag (int dyntag, bfd *abfd, CORE_ADDR *ptr)
-{
- int arch_size, step, sect_size;
- long dyn_tag;
- CORE_ADDR dyn_ptr, dyn_addr;
- gdb_byte *bufend, *bufstart, *buf;
- Elf32_External_Dyn *x_dynp_32;
- Elf64_External_Dyn *x_dynp_64;
- struct bfd_section *sect;
-
- if (abfd == NULL)
- return 0;
-
- if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
- return 0;
-
- arch_size = bfd_get_arch_size (abfd);
- if (arch_size == -1)
- return 0;
-
- /* Find the start address of the .dynamic section. */
- sect = bfd_get_section_by_name (abfd, ".dynamic");
- if (sect == NULL)
- return 0;
-
- bool found = false;
- for (const target_section &target_section
- : current_program_space->target_sections ())
- if (sect == target_section.the_bfd_section)
- {
- dyn_addr = target_section.addr;
- found = true;
- break;
- }
- if (!found)
- {
- /* ABFD may come from OBJFILE acting only as a symbol file without being
- loaded into the target (see add_symbol_file_command). This case is
- such fallback to the file VMA address without the possibility of
- having the section relocated to its actual in-memory address. */
-
- dyn_addr = bfd_section_vma (sect);
- }
-
- /* Read in .dynamic from the BFD. We will get the actual value
- from memory later. */
- sect_size = bfd_section_size (sect);
- buf = bufstart = (gdb_byte *) alloca (sect_size);
- if (!bfd_get_section_contents (abfd, sect,
- buf, 0, sect_size))
- return 0;
-
- /* Iterate over BUF and scan for DYNTAG. If found, set PTR and return. */
- step = (arch_size == 32) ? sizeof (Elf32_External_Dyn)
- : sizeof (Elf64_External_Dyn);
- for (bufend = buf + sect_size;
- buf < bufend;
- buf += step)
- {
- if (arch_size == 32)
- {
- x_dynp_32 = (Elf32_External_Dyn *) buf;
- dyn_tag = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_tag);
- dyn_ptr = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_un.d_ptr);
- }
- else
- {
- x_dynp_64 = (Elf64_External_Dyn *) buf;
- dyn_tag = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_tag);
- dyn_ptr = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_un.d_ptr);
- }
- if (dyn_tag == DT_NULL)
- return 0;
- if (dyn_tag == dyntag)
- {
- /* If requested, try to read the runtime value of this .dynamic
- entry. */
- if (ptr)
- {
- struct type *ptr_type;
- gdb_byte ptr_buf[8];
- CORE_ADDR ptr_addr;
-
- ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
- ptr_addr = dyn_addr + (buf - bufstart) + arch_size / 8;
- if (target_read_memory (ptr_addr, ptr_buf, arch_size / 8) == 0)
- dyn_ptr = extract_typed_address (ptr_buf, ptr_type);
- *ptr = dyn_ptr;
- }
- return 1;
- }
- }
-
- return 0;
-}
-
/* See solist.h. */
static int
"lm_base: get addr %x by _GLOBAL_OFFSET_TABLE_.\n",
(unsigned int) addr);
}
- else if (scan_dyntag (DT_PLTGOT, current_program_space->exec_bfd (), &addr))
+ else if (gdb_bfd_scan_elf_dyntag (DT_PLTGOT,
+ current_program_space->exec_bfd (),
+ &addr, NULL))
{
struct int_elf32_dsbt_loadmap *ldm;