/* Load module for 'compile' command.
- Copyright (C) 2014-2015 Free Software Foundation, Inc.
+ Copyright (C) 2014-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include "compile.h"
#include "block.h"
#include "arch-utils.h"
+#include <algorithm>
+
+/* Track inferior memory reserved by inferior mmap. */
+
+struct munmap_list
+{
+ struct munmap_list *next;
+ CORE_ADDR addr, size;
+};
+
+/* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to list
+ HEADP. *HEADP needs to be initialized to NULL. */
+
+static void
+munmap_list_add (struct munmap_list **headp, CORE_ADDR addr, CORE_ADDR size)
+{
+ struct munmap_list *head_new = XNEW (struct munmap_list);
+
+ head_new->next = *headp;
+ *headp = head_new;
+ head_new->addr = addr;
+ head_new->size = size;
+}
+
+/* Free list of inferior mmap memory ranges HEAD. HEAD is the first
+ element of the list, it can be NULL. After calling this function
+ HEAD pointer is invalid and the possible list needs to be
+ reinitialized by caller to NULL. */
+
+void
+munmap_list_free (struct munmap_list *head)
+{
+ while (head)
+ {
+ struct munmap_list *todo = head;
+
+ head = todo->next;
+ gdbarch_infcall_munmap (target_gdbarch (), todo->addr, todo->size);
+ xfree (todo);
+ }
+}
+
+/* Stub for munmap_list_free suitable for make_cleanup. Contrary to
+ munmap_list_free this function's parameter is a pointer to the first
+ list element pointer. */
+
+static void
+munmap_listp_free_cleanup (void *headp_voidp)
+{
+ struct munmap_list **headp = (struct munmap_list **) headp_voidp;
+
+ munmap_list_free (*headp);
+}
/* Helper data for setup_sections. */
/* Maximum of alignments of all sections matching LAST_PROT.
This value is always at least 1. This value is always a power of 2. */
CORE_ADDR last_max_alignment;
+
+ /* List of inferior mmap ranges where setup_sections should add its
+ next range. */
+ struct munmap_list **munmap_list_headp;
};
/* Place all ABFD sections next to each other obeying all constraints. */
static void
setup_sections (bfd *abfd, asection *sect, void *data_voidp)
{
- struct setup_sections_data *data = data_voidp;
+ struct setup_sections_data *data = (struct setup_sections_data *) data_voidp;
CORE_ADDR alignment;
unsigned prot;
prot |= GDB_MMAP_PROT_EXEC;
if (compile_debug)
- fprintf_unfiltered (gdb_stdout,
+ fprintf_unfiltered (gdb_stdlog,
"module \"%s\" section \"%s\" size %s prot %u\n",
bfd_get_filename (abfd),
bfd_get_section_name (abfd, sect),
{
addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size,
data->last_prot);
+ munmap_list_add (data->munmap_list_headp, addr, data->last_size);
if (compile_debug)
- fprintf_unfiltered (gdb_stdout,
+ fprintf_unfiltered (gdb_stdlog,
"allocated %s bytes at %s prot %u\n",
paddress (target_gdbarch (), data->last_size),
paddress (target_gdbarch (), addr),
return;
alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect);
- data->last_max_alignment = max (data->last_max_alignment, alignment);
+ data->last_max_alignment = std::max (data->last_max_alignment, alignment);
data->last_size = (data->last_size + alignment - 1) & -alignment;
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_multiple_definition (struct bfd_link_info *link_info,
struct bfd_link_hash_entry *h, bfd *nbfd,
asection *nsec, bfd_vma nval)
bfd *abfd = link_info->input_bfds;
if (link_info->allow_multiple_definition)
- return TRUE;
+ return;
warning (_("Compiled module \"%s\": multiple symbol definitions: %s"),
bfd_get_filename (abfd), h->root.string);
- return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning,
const char *symbol, bfd *abfd, asection *section,
bfd_vma address)
warning (_("Compiled module \"%s\" section \"%s\": warning: %s"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
xwarning);
- /* Maybe permit running as a module? */
- return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_undefined_symbol (struct bfd_link_info *link_info,
const char *name, bfd *abfd, asection *section,
bfd_vma address, bfd_boolean is_fatal)
warning (_("Cannot resolve relocation to \"%s\" "
"from compiled module \"%s\" section \"%s\"."),
name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
- return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_reloc_overflow (struct bfd_link_info *link_info,
struct bfd_link_hash_entry *entry,
const char *name, const char *reloc_name,
bfd_vma addend, bfd *abfd, asection *section,
bfd_vma address)
{
- /* TRUE is required for intra-module relocations. */
- return TRUE;
}
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_reloc_dangerous (struct bfd_link_info *link_info,
const char *message, bfd *abfd,
asection *section, bfd_vma address)
"relocation: %s\n"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
message);
- return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
-static bfd_boolean
+static void
link_callbacks_unattached_reloc (struct bfd_link_info *link_info,
const char *name, bfd *abfd, asection *section,
bfd_vma address)
"relocation: %s\n"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
name);
- return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static void
link_hash_table_free (void *d)
{
- struct link_hash_table_cleanup_data *data = d;
+ struct link_hash_table_cleanup_data *data
+ = (struct link_hash_table_cleanup_data *) d;
if (data->abfd->is_linker_output)
(*data->abfd->link.hash->hash_table_free) (data->abfd);
static void
copy_sections (bfd *abfd, asection *sect, void *data)
{
- asymbol **symbol_table = data;
+ asymbol **symbol_table = (asymbol **) data;
bfd_byte *sect_data, *sect_data_got;
struct cleanup *cleanups;
struct bfd_link_info link_info;
link_order.size = bfd_get_section_size (sect);
link_order.u.indirect.section = sect;
- sect_data = xmalloc (bfd_get_section_size (sect));
+ sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect));
make_cleanup (xfree, sect_data);
sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info,
error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
gdb_type = SYMBOL_TYPE (gdb_val_sym);
- CHECK_TYPEDEF (gdb_type);
+ gdb_type = check_typedef (gdb_type);
gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE,
VAR_DOMAIN);
if (gdb_ptr_type_sym == NULL)
error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym);
- CHECK_TYPEDEF (gdb_ptr_type);
+ gdb_ptr_type = check_typedef (gdb_ptr_type);
if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR)
error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE);
gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type);
}
}
-/* Load OBJECT_FILE into inferior memory. Throw an error otherwise.
- Caller must fully dispose the return value by calling compile_object_run.
- SOURCE_FILE's copy is stored into the returned object.
- Caller should free both OBJECT_FILE and SOURCE_FILE immediatelly after this
- function returns.
- Function returns NULL only for COMPILE_I_PRINT_ADDRESS_SCOPE when
- COMPILE_I_PRINT_VALUE_SCOPE should have been used instead. */
+/* Load the object file specified in FILE_NAMES into inferior memory.
+ Throw an error otherwise. Caller must fully dispose the return
+ value by calling compile_object_run. Returns NULL only for
+ COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE
+ should have been used instead. */
struct compile_module *
-compile_object_load (const char *object_file, const char *source_file,
+compile_object_load (const compile_file_names &file_names,
enum compile_i_scope_types scope, void *scope_data)
{
struct cleanup *cleanups, *cleanups_free_objfile;
- bfd *abfd;
struct setup_sections_data setup_sections_data;
CORE_ADDR addr, regs_addr, out_value_addr = 0;
struct symbol *func_sym;
unsigned dptr_type_len = TYPE_LENGTH (dptr_type);
struct compile_module *retval;
struct type *regs_type, *out_value_type = NULL;
- char *filename, **matching;
+ char **matching;
struct objfile *objfile;
int expect_parameters;
struct type *expect_return_type;
+ struct munmap_list *munmap_list_head = NULL;
- filename = tilde_expand (object_file);
- cleanups = make_cleanup (xfree, filename);
+ gdb::unique_xmalloc_ptr<char> filename
+ (tilde_expand (file_names.object_file ()));
- abfd = gdb_bfd_open (filename, gnutarget, -1);
+ gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1));
if (abfd == NULL)
error (_("\"%s\": could not open as compiled module: %s"),
- filename, bfd_errmsg (bfd_get_error ()));
- make_cleanup_bfd_unref (abfd);
+ filename.get (), bfd_errmsg (bfd_get_error ()));
- if (!bfd_check_format_matches (abfd, bfd_object, &matching))
+ if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching))
error (_("\"%s\": not in loadable format: %s"),
- filename, gdb_bfd_errmsg (bfd_get_error (), matching));
+ filename.get (), gdb_bfd_errmsg (bfd_get_error (), matching));
- if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0)
- error (_("\"%s\": not in object format."), filename);
+ if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0)
+ error (_("\"%s\": not in object format."), filename.get ());
setup_sections_data.last_size = 0;
setup_sections_data.last_section_first = abfd->sections;
setup_sections_data.last_prot = -1;
setup_sections_data.last_max_alignment = 1;
- bfd_map_over_sections (abfd, setup_sections, &setup_sections_data);
- setup_sections (abfd, NULL, &setup_sections_data);
+ setup_sections_data.munmap_list_headp = &munmap_list_head;
+ cleanups = make_cleanup (munmap_listp_free_cleanup, &munmap_list_head);
+ bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data);
+ setup_sections (abfd.get (), NULL, &setup_sections_data);
- storage_needed = bfd_get_symtab_upper_bound (abfd);
+ storage_needed = bfd_get_symtab_upper_bound (abfd.get ());
if (storage_needed < 0)
error (_("Cannot read symbols of compiled module \"%s\": %s"),
- filename, bfd_errmsg (bfd_get_error ()));
+ filename.get (), bfd_errmsg (bfd_get_error ()));
/* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in
"Reading symbols from ..." message for automatically generated file. */
- objfile = symbol_file_add_from_bfd (abfd, filename, 0, NULL, 0, NULL);
+ objfile = symbol_file_add_from_bfd (abfd.get (), filename.get (),
+ 0, NULL, 0, NULL);
cleanups_free_objfile = make_cleanup_free_objfile (objfile);
func_sym = lookup_global_symbol_from_objfile (objfile,
GCC_FE_WRAPPER_FUNCTION,
- VAR_DOMAIN);
+ VAR_DOMAIN).symbol;
if (func_sym == NULL)
error (_("Cannot find function \"%s\" in compiled module \"%s\"."),
GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile));
/* The memory may be later needed
by bfd_generic_get_relocated_section_contents
called from default_symfile_relocate. */
- symbol_table = obstack_alloc (&objfile->objfile_obstack, storage_needed);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
+ symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack,
+ storage_needed);
+ number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table);
if (number_of_symbols < 0)
error (_("Cannot parse symbols of compiled module \"%s\": %s"),
- filename, bfd_errmsg (bfd_get_error ()));
+ filename.get (), bfd_errmsg (bfd_get_error ()));
missing_symbols = 0;
for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++)
if (sym->flags != 0)
continue;
- if (compile_debug)
- fprintf_unfiltered (gdb_stdout,
- "lookup undefined ELF symbol \"%s\"\n",
- sym->name);
sym->flags = BSF_GLOBAL;
sym->section = bfd_abs_section_ptr;
if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0)
{
+ if (compile_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "ELF symbol \"%s\" relocated to zero\n",
+ sym->name);
+
+ /* It seems to be a GCC bug, with -mcmodel=large there should be no
+ need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data
+ remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */
sym->value = 0;
continue;
}
{
case mst_text:
sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym);
+ if (compile_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "ELF mst_text symbol \"%s\" relocated to %s\n",
+ sym->name,
+ paddress (target_gdbarch (), sym->value));
break;
case mst_text_gnu_ifunc:
sym->value = gnu_ifunc_resolve_addr (target_gdbarch (),
BMSYMBOL_VALUE_ADDRESS (bmsym));
+ if (compile_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "ELF mst_text_gnu_ifunc symbol \"%s\" "
+ "relocated to %s\n",
+ sym->name,
+ paddress (target_gdbarch (), sym->value));
break;
default:
warning (_("Could not find symbol \"%s\" "
"for compiled module \"%s\"."),
- sym->name, filename);
+ sym->name, filename.get ());
missing_symbols++;
}
}
if (missing_symbols)
error (_("%ld symbols were missing, cannot continue."), missing_symbols);
- bfd_map_over_sections (abfd, copy_sections, symbol_table);
+ bfd_map_over_sections (abfd.get (), copy_sections, symbol_table);
regs_type = get_regs_type (func_sym, objfile);
if (regs_type == NULL)
TYPE_LENGTH (regs_type),
GDB_MMAP_PROT_READ);
gdb_assert (regs_addr != 0);
+ munmap_list_add (&munmap_list_head, regs_addr, TYPE_LENGTH (regs_type));
if (compile_debug)
- fprintf_unfiltered (gdb_stdout,
+ fprintf_unfiltered (gdb_stdlog,
"allocated %s bytes at %s for registers\n",
paddress (target_gdbarch (),
TYPE_LENGTH (regs_type)),
(GDB_MMAP_PROT_READ
| GDB_MMAP_PROT_WRITE));
gdb_assert (out_value_addr != 0);
+ munmap_list_add (&munmap_list_head, out_value_addr,
+ TYPE_LENGTH (out_value_type));
if (compile_debug)
- fprintf_unfiltered (gdb_stdout,
+ fprintf_unfiltered (gdb_stdlog,
"allocated %s bytes at %s for printed value\n",
paddress (target_gdbarch (),
TYPE_LENGTH (out_value_type)),
}
discard_cleanups (cleanups_free_objfile);
- do_cleanups (cleanups);
- retval = xmalloc (sizeof (*retval));
+ retval = XNEW (struct compile_module);
retval->objfile = objfile;
- retval->source_file = xstrdup (source_file);
+ retval->source_file = xstrdup (file_names.source_file ());
retval->func_sym = func_sym;
retval->regs_addr = regs_addr;
retval->scope = scope;
retval->scope_data = scope_data;
retval->out_value_type = out_value_type;
retval->out_value_addr = out_value_addr;
+
+ /* CLEANUPS will free MUNMAP_LIST_HEAD. */
+ retval->munmap_list_head = munmap_list_head;
+ munmap_list_head = NULL;
+
+ do_cleanups (cleanups);
+
return retval;
}