| /* Load module for 'compile' command. |
| |
| Copyright (C) 2014-2016 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "compile-object-load.h" |
| #include "compile-internal.h" |
| #include "command.h" |
| #include "objfiles.h" |
| #include "gdbcore.h" |
| #include "readline/tilde.h" |
| #include "bfdlink.h" |
| #include "gdbcmd.h" |
| #include "regcache.h" |
| #include "inferior.h" |
| #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. */ |
| |
| struct setup_sections_data |
| { |
| /* Size of all recent sections with matching LAST_PROT. */ |
| CORE_ADDR last_size; |
| |
| /* First section matching LAST_PROT. */ |
| asection *last_section_first; |
| |
| /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ |
| unsigned last_prot; |
| |
| /* 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 = (struct setup_sections_data *) data_voidp; |
| CORE_ADDR alignment; |
| unsigned prot; |
| |
| if (sect != NULL) |
| { |
| /* It is required by later bfd_get_relocated_section_contents. */ |
| if (sect->output_section == NULL) |
| sect->output_section = sect; |
| |
| if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| return; |
| |
| /* Make the memory always readable. */ |
| prot = GDB_MMAP_PROT_READ; |
| if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) |
| prot |= GDB_MMAP_PROT_WRITE; |
| if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) |
| prot |= GDB_MMAP_PROT_EXEC; |
| |
| if (compile_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "module \"%s\" section \"%s\" size %s prot %u\n", |
| bfd_get_filename (abfd), |
| bfd_get_section_name (abfd, sect), |
| paddress (target_gdbarch (), |
| bfd_get_section_size (sect)), |
| prot); |
| } |
| else |
| prot = -1; |
| |
| if (sect == NULL |
| || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) |
| { |
| CORE_ADDR addr; |
| asection *sect_iter; |
| |
| if (data->last_size != 0) |
| { |
| 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_stdlog, |
| "allocated %s bytes at %s prot %u\n", |
| paddress (target_gdbarch (), data->last_size), |
| paddress (target_gdbarch (), addr), |
| data->last_prot); |
| } |
| else |
| addr = 0; |
| |
| if ((addr & (data->last_max_alignment - 1)) != 0) |
| error (_("Inferior compiled module address %s " |
| "is not aligned to BFD required %s."), |
| paddress (target_gdbarch (), addr), |
| paddress (target_gdbarch (), data->last_max_alignment)); |
| |
| for (sect_iter = data->last_section_first; sect_iter != sect; |
| sect_iter = sect_iter->next) |
| if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) |
| bfd_set_section_vma (abfd, sect_iter, |
| addr + bfd_get_section_vma (abfd, sect_iter)); |
| |
| data->last_size = 0; |
| data->last_section_first = sect; |
| data->last_prot = prot; |
| data->last_max_alignment = 1; |
| } |
| |
| if (sect == NULL) |
| return; |
| |
| alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); |
| data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
| |
| data->last_size = (data->last_size + alignment - 1) & -alignment; |
| |
| bfd_set_section_vma (abfd, sect, data->last_size); |
| |
| data->last_size += bfd_get_section_size (sect); |
| data->last_size = (data->last_size + alignment - 1) & -alignment; |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| 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; |
| warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
| bfd_get_filename (abfd), h->root.string); |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| 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); |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| 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)); |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| 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) |
| { |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| static void |
| link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
| const char *message, bfd *abfd, |
| asection *section, bfd_vma address) |
| { |
| warning (_("Compiled module \"%s\" section \"%s\": dangerous " |
| "relocation: %s\n"), |
| bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
| message); |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| static void |
| link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
| const char *name, bfd *abfd, asection *section, |
| bfd_vma address) |
| { |
| warning (_("Compiled module \"%s\" section \"%s\": unattached " |
| "relocation: %s\n"), |
| bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
| name); |
| } |
| |
| /* Helper for link_callbacks callbacks vector. */ |
| |
| static void link_callbacks_einfo (const char *fmt, ...) |
| ATTRIBUTE_PRINTF (1, 2); |
| |
| static void |
| link_callbacks_einfo (const char *fmt, ...) |
| { |
| struct cleanup *cleanups; |
| va_list ap; |
| char *str; |
| |
| va_start (ap, fmt); |
| str = xstrvprintf (fmt, ap); |
| va_end (ap); |
| cleanups = make_cleanup (xfree, str); |
| |
| warning (_("Compile module: warning: %s"), str); |
| |
| do_cleanups (cleanups); |
| } |
| |
| /* Helper for bfd_get_relocated_section_contents. |
| Only these symbols are set by bfd_simple_get_relocated_section_contents |
| but bfd/ seems to use even the NULL ones without checking them first. */ |
| |
| static const struct bfd_link_callbacks link_callbacks = |
| { |
| NULL, /* add_archive_element */ |
| link_callbacks_multiple_definition, /* multiple_definition */ |
| NULL, /* multiple_common */ |
| NULL, /* add_to_set */ |
| NULL, /* constructor */ |
| link_callbacks_warning, /* warning */ |
| link_callbacks_undefined_symbol, /* undefined_symbol */ |
| link_callbacks_reloc_overflow, /* reloc_overflow */ |
| link_callbacks_reloc_dangerous, /* reloc_dangerous */ |
| link_callbacks_unattached_reloc, /* unattached_reloc */ |
| NULL, /* notice */ |
| link_callbacks_einfo, /* einfo */ |
| NULL, /* info */ |
| NULL, /* minfo */ |
| NULL, /* override_segment_assignment */ |
| }; |
| |
| struct link_hash_table_cleanup_data |
| { |
| bfd *abfd; |
| bfd *link_next; |
| }; |
| |
| /* Cleanup callback for struct bfd_link_info. */ |
| |
| static void |
| link_hash_table_free (void *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); |
| data->abfd->link.next = data->link_next; |
| } |
| |
| /* Relocate and store into inferior memory each section SECT of ABFD. */ |
| |
| static void |
| copy_sections (bfd *abfd, asection *sect, void *data) |
| { |
| asymbol **symbol_table = (asymbol **) data; |
| bfd_byte *sect_data, *sect_data_got; |
| struct cleanup *cleanups; |
| struct bfd_link_info link_info; |
| struct bfd_link_order link_order; |
| CORE_ADDR inferior_addr; |
| struct link_hash_table_cleanup_data cleanup_data; |
| |
| if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) |
| != (SEC_ALLOC | SEC_LOAD)) |
| return; |
| |
| if (bfd_get_section_size (sect) == 0) |
| return; |
| |
| /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB |
| cannot use as it does not report relocations to undefined symbols. */ |
| memset (&link_info, 0, sizeof (link_info)); |
| link_info.output_bfd = abfd; |
| link_info.input_bfds = abfd; |
| link_info.input_bfds_tail = &abfd->link.next; |
| |
| cleanup_data.abfd = abfd; |
| cleanup_data.link_next = abfd->link.next; |
| |
| abfd->link.next = NULL; |
| link_info.hash = bfd_link_hash_table_create (abfd); |
| |
| cleanups = make_cleanup (link_hash_table_free, &cleanup_data); |
| link_info.callbacks = &link_callbacks; |
| |
| memset (&link_order, 0, sizeof (link_order)); |
| link_order.next = NULL; |
| link_order.type = bfd_indirect_link_order; |
| link_order.offset = 0; |
| link_order.size = bfd_get_section_size (sect); |
| link_order.u.indirect.section = 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, |
| &link_order, sect_data, |
| FALSE, symbol_table); |
| |
| if (sect_data_got == NULL) |
| error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), |
| bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), |
| bfd_errmsg (bfd_get_error ())); |
| gdb_assert (sect_data_got == sect_data); |
| |
| inferior_addr = bfd_get_section_vma (abfd, sect); |
| if (0 != target_write_memory (inferior_addr, sect_data, |
| bfd_get_section_size (sect))) |
| error (_("Cannot write compiled module \"%s\" section \"%s\" " |
| "to inferior memory range %s-%s."), |
| bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), |
| paddress (target_gdbarch (), inferior_addr), |
| paddress (target_gdbarch (), |
| inferior_addr + bfd_get_section_size (sect))); |
| |
| do_cleanups (cleanups); |
| } |
| |
| /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
| symbols in OBJFILE so we can calculate how much memory to allocate |
| for the out parameter. This avoids needing a malloc in the generated |
| code. Throw an error if anything fails. |
| GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. |
| If it finds user tries to print an array type this function returns |
| NULL. Caller will then regenerate the code with |
| COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. |
| This is because __auto_type array-to-pointer type conversion of |
| COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE |
| preserving the array type. */ |
| |
| static struct type * |
| get_out_value_type (struct symbol *func_sym, struct objfile *objfile, |
| enum compile_i_scope_types scope) |
| { |
| struct symbol *gdb_ptr_type_sym; |
| /* Initialize it just to avoid a GCC false warning. */ |
| struct symbol *gdb_val_sym = NULL; |
| struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
| /* Initialize it just to avoid a GCC false warning. */ |
| const struct block *block = NULL; |
| const struct blockvector *bv; |
| int nblocks = 0; |
| int block_loop = 0; |
| |
| bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); |
| nblocks = BLOCKVECTOR_NBLOCKS (bv); |
| |
| gdb_ptr_type_sym = NULL; |
| for (block_loop = 0; block_loop < nblocks; block_loop++) |
| { |
| struct symbol *function = NULL; |
| const struct block *function_block; |
| |
| block = BLOCKVECTOR_BLOCK (bv, block_loop); |
| if (BLOCK_FUNCTION (block) != NULL) |
| continue; |
| gdb_val_sym = block_lookup_symbol (block, COMPILE_I_EXPR_VAL, VAR_DOMAIN); |
| if (gdb_val_sym == NULL) |
| continue; |
| |
| function_block = block; |
| while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) |
| && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| { |
| function_block = BLOCK_SUPERBLOCK (function_block); |
| function = BLOCK_FUNCTION (function_block); |
| if (function != NULL) |
| break; |
| } |
| if (function != NULL |
| && (BLOCK_SUPERBLOCK (function_block) |
| == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) |
| && (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION) |
| == 0)) |
| break; |
| } |
| if (block_loop == nblocks) |
| error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); |
| |
| gdb_type = SYMBOL_TYPE (gdb_val_sym); |
| 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); |
| 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); |
| |
| if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) |
| { |
| if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) |
| error (_("Expected address scope in compiled module \"%s\"."), |
| objfile_name (objfile)); |
| return gdb_type; |
| } |
| |
| if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) |
| error (_("Invalid type code %d of symbol \"%s\" " |
| "in compiled module \"%s\"."), |
| TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, |
| objfile_name (objfile)); |
| |
| retval = gdb_type_from_ptr; |
| switch (TYPE_CODE (gdb_type_from_ptr)) |
| { |
| case TYPE_CODE_ARRAY: |
| gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); |
| break; |
| case TYPE_CODE_FUNC: |
| break; |
| default: |
| error (_("Invalid type code %d of symbol \"%s\" " |
| "in compiled module \"%s\"."), |
| TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, |
| objfile_name (objfile)); |
| } |
| if (!types_deeply_equal (gdb_type_from_ptr, |
| TYPE_TARGET_TYPE (gdb_type))) |
| error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " |
| "in compiled module \"%s\"."), |
| COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, |
| objfile_name (objfile)); |
| if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) |
| return NULL; |
| return retval; |
| } |
| |
| /* Fetch the type of first parameter of FUNC_SYM. |
| Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ |
| |
| static struct type * |
| get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
| { |
| struct type *func_type = SYMBOL_TYPE (func_sym); |
| struct type *regsp_type, *regs_type; |
| |
| /* No register parameter present. */ |
| if (TYPE_NFIELDS (func_type) == 0) |
| return NULL; |
| |
| regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
| if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) |
| error (_("Invalid type code %d of first parameter of function \"%s\" " |
| "in compiled module \"%s\"."), |
| TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, |
| objfile_name (objfile)); |
| |
| regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); |
| if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) |
| error (_("Invalid type code %d of dereferenced first parameter " |
| "of function \"%s\" in compiled module \"%s\"."), |
| TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, |
| objfile_name (objfile)); |
| |
| return regs_type; |
| } |
| |
| /* Store all inferior registers required by REGS_TYPE to inferior memory |
| starting at inferior address REGS_BASE. */ |
| |
| static void |
| store_regs (struct type *regs_type, CORE_ADDR regs_base) |
| { |
| struct gdbarch *gdbarch = target_gdbarch (); |
| struct regcache *regcache = get_thread_regcache (inferior_ptid); |
| int fieldno; |
| |
| for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) |
| { |
| const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); |
| ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); |
| ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); |
| ULONGEST reg_offset; |
| struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, |
| fieldno)); |
| ULONGEST reg_size = TYPE_LENGTH (reg_type); |
| int regnum; |
| struct value *regval; |
| CORE_ADDR inferior_addr; |
| |
| if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) |
| continue; |
| |
| if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) |
| error (_("Invalid register \"%s\" position %s bits or size %s bits"), |
| reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); |
| reg_offset = reg_bitpos / 8; |
| |
| if (TYPE_CODE (reg_type) != TYPE_CODE_INT |
| && TYPE_CODE (reg_type) != TYPE_CODE_PTR) |
| error (_("Invalid register \"%s\" type code %d"), reg_name, |
| TYPE_CODE (reg_type)); |
| |
| regnum = compile_register_name_demangle (gdbarch, reg_name); |
| |
| regval = value_from_register (reg_type, regnum, get_current_frame ()); |
| if (value_optimized_out (regval)) |
| error (_("Register \"%s\" is optimized out."), reg_name); |
| if (!value_entirely_available (regval)) |
| error (_("Register \"%s\" is not available."), reg_name); |
| |
| inferior_addr = regs_base + reg_offset; |
| if (0 != target_write_memory (inferior_addr, value_contents (regval), |
| reg_size)) |
| error (_("Cannot write register \"%s\" to inferior memory at %s."), |
| reg_name, paddress (gdbarch, inferior_addr)); |
| } |
| } |
| |
| /* 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 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; |
| struct type *func_type; |
| struct bound_minimal_symbol bmsym; |
| long storage_needed; |
| asymbol **symbol_table, **symp; |
| long number_of_symbols, missing_symbols; |
| struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
| unsigned dptr_type_len = TYPE_LENGTH (dptr_type); |
| struct compile_module *retval; |
| struct type *regs_type, *out_value_type = NULL; |
| char *filename, **matching; |
| struct objfile *objfile; |
| int expect_parameters; |
| struct type *expect_return_type; |
| struct munmap_list *munmap_list_head = NULL; |
| |
| filename = tilde_expand (file_names.object_file ()); |
| cleanups = make_cleanup (xfree, filename); |
| |
| abfd = gdb_bfd_open (filename, 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); |
| |
| if (!bfd_check_format_matches (abfd, bfd_object, &matching)) |
| error (_("\"%s\": not in loadable format: %s"), |
| filename, gdb_bfd_errmsg (bfd_get_error (), matching)); |
| |
| if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0) |
| error (_("\"%s\": not in object format."), filename); |
| |
| 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; |
| setup_sections_data.munmap_list_headp = &munmap_list_head; |
| make_cleanup (munmap_listp_free_cleanup, &munmap_list_head); |
| bfd_map_over_sections (abfd, setup_sections, &setup_sections_data); |
| setup_sections (abfd, NULL, &setup_sections_data); |
| |
| storage_needed = bfd_get_symtab_upper_bound (abfd); |
| if (storage_needed < 0) |
| error (_("Cannot read symbols of compiled module \"%s\": %s"), |
| filename, 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); |
| cleanups_free_objfile = make_cleanup_free_objfile (objfile); |
| |
| func_sym = lookup_global_symbol_from_objfile (objfile, |
| GCC_FE_WRAPPER_FUNCTION, |
| VAR_DOMAIN).symbol; |
| if (func_sym == NULL) |
| error (_("Cannot find function \"%s\" in compiled module \"%s\"."), |
| GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); |
| func_type = SYMBOL_TYPE (func_sym); |
| if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) |
| error (_("Invalid type code %d of function \"%s\" in compiled " |
| "module \"%s\"."), |
| TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, |
| objfile_name (objfile)); |
| |
| switch (scope) |
| { |
| case COMPILE_I_SIMPLE_SCOPE: |
| expect_parameters = 1; |
| expect_return_type = builtin_type (target_gdbarch ())->builtin_void; |
| break; |
| case COMPILE_I_RAW_SCOPE: |
| expect_parameters = 0; |
| expect_return_type = builtin_type (target_gdbarch ())->builtin_void; |
| break; |
| case COMPILE_I_PRINT_ADDRESS_SCOPE: |
| case COMPILE_I_PRINT_VALUE_SCOPE: |
| expect_parameters = 2; |
| expect_return_type = builtin_type (target_gdbarch ())->builtin_void; |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); |
| } |
| if (TYPE_NFIELDS (func_type) != expect_parameters) |
| error (_("Invalid %d parameters of function \"%s\" in compiled " |
| "module \"%s\"."), |
| TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, |
| objfile_name (objfile)); |
| if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) |
| error (_("Invalid return type of 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 = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
| storage_needed); |
| number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); |
| if (number_of_symbols < 0) |
| error (_("Cannot parse symbols of compiled module \"%s\": %s"), |
| filename, bfd_errmsg (bfd_get_error ())); |
| |
| missing_symbols = 0; |
| for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) |
| { |
| asymbol *sym = *symp; |
| |
| if (sym->flags != 0) |
| continue; |
| 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; |
| } |
| bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); |
| switch (bmsym.minsym == NULL |
| ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) |
| { |
| 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); |
| missing_symbols++; |
| } |
| } |
| if (missing_symbols) |
| error (_("%ld symbols were missing, cannot continue."), missing_symbols); |
| |
| bfd_map_over_sections (abfd, copy_sections, symbol_table); |
| |
| regs_type = get_regs_type (func_sym, objfile); |
| if (regs_type == NULL) |
| regs_addr = 0; |
| else |
| { |
| /* Use read-only non-executable memory protection. */ |
| regs_addr = gdbarch_infcall_mmap (target_gdbarch (), |
| 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_stdlog, |
| "allocated %s bytes at %s for registers\n", |
| paddress (target_gdbarch (), |
| TYPE_LENGTH (regs_type)), |
| paddress (target_gdbarch (), regs_addr)); |
| store_regs (regs_type, regs_addr); |
| } |
| |
| if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
| || scope == COMPILE_I_PRINT_VALUE_SCOPE) |
| { |
| out_value_type = get_out_value_type (func_sym, objfile, scope); |
| if (out_value_type == NULL) |
| { |
| do_cleanups (cleanups); |
| return NULL; |
| } |
| check_typedef (out_value_type); |
| out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), |
| TYPE_LENGTH (out_value_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_stdlog, |
| "allocated %s bytes at %s for printed value\n", |
| paddress (target_gdbarch (), |
| TYPE_LENGTH (out_value_type)), |
| paddress (target_gdbarch (), out_value_addr)); |
| } |
| |
| discard_cleanups (cleanups_free_objfile); |
| |
| retval = XNEW (struct compile_module); |
| retval->objfile = objfile; |
| 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; |
| } |