macosx-nat-dyld-io.c [plain text]
#include "defs.h"
#include "inferior.h"
#include "symfile.h"
#include "symtab.h"
#include "gdbcmd.h"
#include "objfiles.h"
#include "target.h"
#include "exceptions.h"
#include "gdbcore.h"
#include <string.h>
#include <sys/stat.h>
#include <mach-o/nlist.h>
#include <mach-o/loader.h>
#include <mach-o/dyld_debug.h>
#include "libbfd.h"
#include "mach-o.h"
#include "macosx-nat-inferior.h"
#include "macosx-nat-mutils.h"
#include "macosx-nat-dyld-info.h"
struct inferior_info
{
bfd_vma addr;
bfd_vma offset;
bfd_vma len;
void *read;
};
static void *
inferior_open (bfd *abfd, void *open_closure)
{
struct inferior_info *in = NULL;
struct inferior_info *ret = NULL;
in = (struct inferior_info *) open_closure;
ret = bfd_zalloc (abfd, sizeof (struct inferior_info));
*ret = *in;
return ret;
}
static file_ptr
inferior_read_generic (bfd *abfd, void *stream, void *data, file_ptr nbytes, file_ptr offset)
{
struct inferior_info *iptr = (struct inferior_info *) stream;
volatile struct gdb_exception except;
CHECK_FATAL (iptr != NULL);
if (strcmp (current_target.to_shortname, "macos-child") != 0
&& strcmp (current_target.to_shortname, "remote") != 0)
{
bfd_set_error (bfd_error_no_contents);
return 0;
}
if (offset > iptr->len)
{
bfd_set_error (bfd_error_no_contents);
return 0;
}
TRY_CATCH (except, RETURN_MASK_ERROR)
{
read_memory (iptr->addr + offset, data, nbytes);
}
if (except.reason < 0)
{
bfd_set_error (bfd_error_system_call);
return 0;
}
return nbytes;
}
static file_ptr
inferior_read_mach_o (bfd *abfd, void *stream, void *data, file_ptr nbytes, file_ptr offset)
{
volatile struct gdb_exception except;
struct inferior_info *iptr = (struct inferior_info *) stream;
unsigned int i;
int ret;
CHECK_FATAL (iptr != NULL);
if (strcmp (current_target.to_shortname, "macos-child") != 0
&& strcmp (current_target.to_shortname, "remote") != 0)
{
bfd_set_error (bfd_error_no_contents);
return 0;
}
if ((strcmp (bfd_get_target (abfd), "mach-o-be") != 0)
&& (strcmp (bfd_get_target (abfd), "mach-o-le") != 0)
&& (strcmp (bfd_get_target (abfd), "mach-o") != 0))
{
bfd_set_error (bfd_error_invalid_target);
return 0;
}
{
struct mach_o_data_struct *mdata = NULL;
CHECK_FATAL (bfd_mach_o_valid (abfd));
mdata = abfd->tdata.mach_o_data;
for (i = 0; i < mdata->header.ncmds; i++)
{
struct bfd_mach_o_load_command *cmd = &mdata->commands[i];
if (cmd->type == BFD_MACH_O_LC_SEGMENT
|| cmd->type == BFD_MACH_O_LC_SEGMENT_64)
{
struct bfd_mach_o_segment_command *segment =
&cmd->command.segment;
if ((offset >= segment->fileoff)
&& (offset < (segment->fileoff + segment->filesize)))
{
bfd_vma infaddr =
(segment->vmaddr + iptr->offset +
(offset - segment->fileoff));
TRY_CATCH (except, RETURN_MASK_ERROR)
{
read_memory (infaddr, data, nbytes);
}
if (ret <= 0)
{
bfd_set_error (bfd_error_system_call);
return 0;
}
return ret;
}
}
}
}
bfd_set_error (bfd_error_no_contents);
return 0;
}
static file_ptr
inferior_read (bfd *abfd, void *stream, void *data, file_ptr nbytes, file_ptr offset)
{
if ((strcmp (bfd_get_target (abfd), "mach-o-be") == 0)
|| (strcmp (bfd_get_target (abfd), "mach-o-le") == 0)
|| (strcmp (bfd_get_target (abfd), "mach-o") == 0))
{
if (bfd_mach_o_valid (abfd))
return inferior_read_mach_o (abfd, stream, data, nbytes, offset);
}
return inferior_read_generic (abfd, stream, data, nbytes, offset);
}
static int
inferior_close (bfd *abfd, void *stream)
{
return 0;
}
static bfd *
inferior_bfd_generic (const char *name, CORE_ADDR addr, CORE_ADDR offset,
CORE_ADDR len)
{
struct inferior_info info;
char *filename = NULL;
bfd *abfd = NULL;
info.addr = addr;
info.offset = offset;
info.len = len;
info.read = 0;
if (name != NULL)
{
xasprintf (&filename, "[memory object \"%s\" at 0x%s for 0x%s]",
name, paddr_nz (addr), paddr_nz (len));
}
else
{
xasprintf (&filename, "[memory object at 0x%s for 0x%s]",
paddr_nz (addr), paddr_nz (len));
}
if (filename == NULL)
{
warning ("unable to allocate memory for filename for \"%s\"", name);
return NULL;
}
abfd = bfd_openr_iovec (filename, NULL,
inferior_open, &info,
inferior_read, inferior_close);
if (abfd == NULL)
{
warning ("Unable to open memory image for \"%s\"; skipping", name);
return NULL;
}
if (!bfd_check_format (abfd, bfd_object))
{
warning ("Unable to read symbols from %s: %s.", bfd_get_filename (abfd),
bfd_errmsg (bfd_get_error ()));
bfd_close (abfd);
return NULL;
}
return abfd;
}
bfd *
inferior_bfd (const char *name, CORE_ADDR addr, CORE_ADDR offset, CORE_ADDR len)
{
bfd *abfd = inferior_bfd_generic (name, addr, offset, len);
if (abfd == NULL)
return abfd;
return abfd;
}