#include "defs.h"
#include "symtab.h"
#include "gdbcore.h"
#include "objfiles.h"
#include "exceptions.h"
#include "gdbcmd.h"
#include "target.h"
#include "value.h"
#include "symfile.h"
#include "observer.h"
#include "auxv.h"
#include "elf/common.h"
static struct objfile *
symbol_file_add_from_memory (struct bfd *templ, CORE_ADDR addr, char *name,
int from_tty)
{
struct objfile *objf;
struct bfd *nbfd;
struct bfd_section *sec;
bfd_vma loadbase;
struct section_addr_info *sai;
unsigned int i;
if (bfd_get_flavour (templ) != bfd_target_elf_flavour)
error (_("add-symbol-file-from-memory not supported for this target"));
nbfd = bfd_elf_bfd_from_remote_memory (templ, addr, &loadbase,
target_read_memory);
if (nbfd == NULL)
error (_("Failed to read a valid object file image from memory."));
if (name == NULL)
nbfd->filename = xstrdup ("shared object read from target memory");
else
nbfd->filename = name;
if (!bfd_check_format (nbfd, bfd_object))
{
bfd_close (nbfd);
error (_("Got object file from memory but can't read symbols: %s."),
bfd_errmsg (bfd_get_error ()));
}
sai = alloc_section_addr_info (bfd_count_sections (nbfd));
make_cleanup (xfree, sai);
i = 0;
for (sec = nbfd->sections; sec != NULL; sec = sec->next)
if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0)
{
sai->other[i].addr = bfd_get_section_vma (nbfd, sec) + loadbase;
sai->other[i].name = (char *) bfd_get_section_name (nbfd, sec);
sai->other[i].sectindex = sec->index;
++i;
}
objf = symbol_file_add_from_bfd (nbfd, from_tty,
sai, 0, OBJF_SHARED);
reinit_frame_cache ();
return objf;
}
static void
add_symbol_file_from_memory_command (char *args, int from_tty)
{
CORE_ADDR addr;
struct bfd *templ;
if (args == NULL)
error (_("add-symbol-file-from-memory requires an expression argument"));
addr = parse_and_eval_address (args);
if (symfile_objfile != NULL)
templ = symfile_objfile->obfd;
else
templ = exec_bfd;
if (templ == NULL)
error (_("\
Must use symbol-file or exec-file before add-symbol-file-from-memory."));
symbol_file_add_from_memory (templ, addr, NULL, from_tty);
}
struct symbol_file_add_from_memory_args
{
struct bfd *bfd;
CORE_ADDR sysinfo_ehdr;
char *name;
int from_tty;
};
static int
symbol_file_add_from_memory_wrapper (struct ui_out *uiout, void *data)
{
struct symbol_file_add_from_memory_args *args = data;
symbol_file_add_from_memory (args->bfd, args->sysinfo_ehdr, args->name,
args->from_tty);
return 0;
}
static void
add_vsyscall_page (struct target_ops *target, int from_tty)
{
CORE_ADDR sysinfo_ehdr;
if (target_auxv_search (target, AT_SYSINFO_EHDR, &sysinfo_ehdr) > 0
&& sysinfo_ehdr != (CORE_ADDR) 0)
{
struct bfd *bfd;
struct symbol_file_add_from_memory_args args;
if (core_bfd != NULL)
bfd = core_bfd;
else if (exec_bfd != NULL)
bfd = exec_bfd;
else
{
warning (_("\
Could not load vsyscall page because no executable was specified\n\
try using the \"file\" command first."));
return;
}
args.bfd = bfd;
args.sysinfo_ehdr = sysinfo_ehdr;
xasprintf (&args.name, "system-supplied DSO at 0x%s",
paddr_nz (sysinfo_ehdr));
args.from_tty = 0;
catch_exceptions (uiout, symbol_file_add_from_memory_wrapper,
&args, RETURN_MASK_ALL);
}
}
void
_initialize_symfile_mem (void)
{
add_cmd ("add-symbol-file-from-memory", class_files,
add_symbol_file_from_memory_command, _("\
Load the symbols out of memory from a dynamically loaded object file.\n\
Give an expression for the address of the file's shared object file header."),
&cmdlist);
observer_attach_inferior_created (add_vsyscall_page);
}