/* Target-dependent code for DICOS running on i386's, for GDB.
- Copyright (C) 2008 Free Software Foundation, Inc.
+ Copyright (C) 2008-2022 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "osabi.h"
-#include "gdb_string.h"
-#include "solib.h"
-#include "solib-target.h"
-#include "inferior.h"
-
-static CORE_ADDR
-i386_dicos_push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr,
- struct value **args, int nargs,
- struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
- struct regcache *regcache)
-{
- int bplen;
- CORE_ADDR bppc = sp;
-
- gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
- *bp_addr = sp - bplen;
- *real_pc = funaddr;
-
- return *bp_addr;
-}
+#include "dicos-tdep.h"
+#include "gdbarch.h"
static void
i386_dicos_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- set_solib_ops (gdbarch, &solib_target_so_ops);
-
- /* Every process, although has its own address space, sees the same
- list of shared libraries. */
- set_gdbarch_has_global_solist (gdbarch, 1);
-
- /* There's no (standard definition of) entry point or a guaranteed
- text location we could find with a symbol where to place the call
- dummy, so we put it on the stack. */
- set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
- set_gdbarch_push_dummy_code (gdbarch, i386_dicos_push_dummy_code);
-
- /* DICOS rewinds itself. Need to override the i386 default which is
- to decrement the PC. */
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
-}
-
-/* Look in the elf symbol table of ABFD for a symbol named WANTED.
- Return true if found. */
-static int
-i386_dicos_bfd_has_symbol_p (bfd *abfd, const char *wanted)
-{
- long storage_needed;
- int ret = 0;
- asymbol **symbol_table = NULL;
-
- storage_needed = bfd_get_symtab_upper_bound (abfd);
- if (storage_needed < 0)
- {
- warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
- return 0;
- }
-
- if (storage_needed > 0)
- {
- long i, symcount;
-
- symbol_table = xmalloc (storage_needed);
- symcount = bfd_canonicalize_symtab (abfd, symbol_table);
-
- if (symcount < 0)
- warning (_("Can't read elf symbols from %s: %s"),
- bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
- else
- {
- for (i = 0; i < symcount; i++)
- {
- asymbol *sym = symbol_table[i];
- if (sym->name != NULL
- && wanted[0] == sym->name[0]
- && strcmp (wanted + 1, sym->name + 1) == 0)
- {
- ret = 1;
- break;
- }
- }
- }
- }
-
- xfree (symbol_table);
- return ret;
+ dicos_init_abi (gdbarch);
}
static enum gdb_osabi
i386_dicos_osabi_sniffer (bfd *abfd)
{
- char *target_name = bfd_get_target (abfd);
+ const char *target_name = bfd_get_target (abfd);
- /* DICOS debug info files don't have a .note.ABI-tag marker or
- something similar. We do know there's always a "header" section
- of 36 bytes, and there's always a "Dicos_loadModuleInfo" symbol
- defined. Look for the section first, as that should be
- cheaper. */
- if (strcmp (target_name, "elf32-i386") == 0)
- {
- asection *section = bfd_get_section_by_name (abfd, "header");
- if (section
- && bfd_section_size (abfd, section) == 36
- && i386_dicos_bfd_has_symbol_p (abfd, "Dicos_loadModuleInfo"))
- return GDB_OSABI_DICOS;
- }
+ /* On x86-DICOS, the Load Module's "header" section is 36 bytes. */
+ if (strcmp (target_name, "elf32-i386") == 0
+ && dicos_load_module_p (abfd, 36))
+ return GDB_OSABI_DICOS;
return GDB_OSABI_UNKNOWN;
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_i386_dicos_tdep (void);
-
+void _initialize_i386_dicos_tdep ();
void
-_initialize_i386_dicos_tdep (void)
+_initialize_i386_dicos_tdep ()
{
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
- i386_dicos_osabi_sniffer);
+ i386_dicos_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_DICOS,
- i386_dicos_init_abi);
+ i386_dicos_init_abi);
}