832 lines
27 KiB
C
832 lines
27 KiB
C
/* Load module for 'compile' command.
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Copyright (C) 2014-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "compile-object-load.h"
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#include "compile-internal.h"
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#include "command.h"
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#include "objfiles.h"
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#include "gdbcore.h"
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#include "readline/tilde.h"
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#include "bfdlink.h"
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#include "gdbcmd.h"
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#include "regcache.h"
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#include "inferior.h"
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#include "compile.h"
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#include "block.h"
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#include "arch-utils.h"
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#include <algorithm>
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/* Track inferior memory reserved by inferior mmap. */
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struct munmap_list
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{
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struct munmap_list *next;
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CORE_ADDR addr, size;
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};
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/* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to list
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HEADP. *HEADP needs to be initialized to NULL. */
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static void
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munmap_list_add (struct munmap_list **headp, CORE_ADDR addr, CORE_ADDR size)
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{
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struct munmap_list *head_new = XNEW (struct munmap_list);
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head_new->next = *headp;
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*headp = head_new;
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head_new->addr = addr;
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head_new->size = size;
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}
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/* Free list of inferior mmap memory ranges HEAD. HEAD is the first
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element of the list, it can be NULL. After calling this function
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HEAD pointer is invalid and the possible list needs to be
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reinitialized by caller to NULL. */
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void
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munmap_list_free (struct munmap_list *head)
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{
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while (head)
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{
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struct munmap_list *todo = head;
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head = todo->next;
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gdbarch_infcall_munmap (target_gdbarch (), todo->addr, todo->size);
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xfree (todo);
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}
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}
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/* Stub for munmap_list_free suitable for make_cleanup. Contrary to
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munmap_list_free this function's parameter is a pointer to the first
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list element pointer. */
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static void
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munmap_listp_free_cleanup (void *headp_voidp)
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{
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struct munmap_list **headp = (struct munmap_list **) headp_voidp;
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munmap_list_free (*headp);
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}
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/* Helper data for setup_sections. */
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struct setup_sections_data
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{
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/* Size of all recent sections with matching LAST_PROT. */
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CORE_ADDR last_size;
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/* First section matching LAST_PROT. */
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asection *last_section_first;
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/* Memory protection like the prot parameter of gdbarch_infcall_mmap. */
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unsigned last_prot;
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/* Maximum of alignments of all sections matching LAST_PROT.
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This value is always at least 1. This value is always a power of 2. */
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CORE_ADDR last_max_alignment;
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/* List of inferior mmap ranges where setup_sections should add its
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next range. */
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struct munmap_list **munmap_list_headp;
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};
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/* Place all ABFD sections next to each other obeying all constraints. */
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static void
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setup_sections (bfd *abfd, asection *sect, void *data_voidp)
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{
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struct setup_sections_data *data = (struct setup_sections_data *) data_voidp;
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CORE_ADDR alignment;
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unsigned prot;
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if (sect != NULL)
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{
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/* It is required by later bfd_get_relocated_section_contents. */
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if (sect->output_section == NULL)
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sect->output_section = sect;
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if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
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return;
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/* Make the memory always readable. */
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prot = GDB_MMAP_PROT_READ;
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if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0)
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prot |= GDB_MMAP_PROT_WRITE;
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if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0)
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prot |= GDB_MMAP_PROT_EXEC;
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if (compile_debug)
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fprintf_unfiltered (gdb_stdlog,
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"module \"%s\" section \"%s\" size %s prot %u\n",
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bfd_get_filename (abfd),
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bfd_get_section_name (abfd, sect),
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paddress (target_gdbarch (),
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bfd_get_section_size (sect)),
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prot);
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}
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else
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prot = -1;
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if (sect == NULL
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|| (data->last_prot != prot && bfd_get_section_size (sect) != 0))
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{
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CORE_ADDR addr;
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asection *sect_iter;
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if (data->last_size != 0)
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{
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addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size,
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data->last_prot);
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munmap_list_add (data->munmap_list_headp, addr, data->last_size);
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if (compile_debug)
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fprintf_unfiltered (gdb_stdlog,
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"allocated %s bytes at %s prot %u\n",
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paddress (target_gdbarch (), data->last_size),
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paddress (target_gdbarch (), addr),
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data->last_prot);
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}
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else
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addr = 0;
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if ((addr & (data->last_max_alignment - 1)) != 0)
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error (_("Inferior compiled module address %s "
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"is not aligned to BFD required %s."),
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paddress (target_gdbarch (), addr),
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paddress (target_gdbarch (), data->last_max_alignment));
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for (sect_iter = data->last_section_first; sect_iter != sect;
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sect_iter = sect_iter->next)
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if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0)
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bfd_set_section_vma (abfd, sect_iter,
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addr + bfd_get_section_vma (abfd, sect_iter));
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data->last_size = 0;
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data->last_section_first = sect;
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data->last_prot = prot;
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data->last_max_alignment = 1;
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}
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if (sect == NULL)
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return;
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alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect);
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data->last_max_alignment = std::max (data->last_max_alignment, alignment);
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data->last_size = (data->last_size + alignment - 1) & -alignment;
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bfd_set_section_vma (abfd, sect, data->last_size);
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data->last_size += bfd_get_section_size (sect);
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data->last_size = (data->last_size + alignment - 1) & -alignment;
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_multiple_definition (struct bfd_link_info *link_info,
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struct bfd_link_hash_entry *h, bfd *nbfd,
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asection *nsec, bfd_vma nval)
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{
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bfd *abfd = link_info->input_bfds;
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if (link_info->allow_multiple_definition)
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return;
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warning (_("Compiled module \"%s\": multiple symbol definitions: %s"),
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bfd_get_filename (abfd), h->root.string);
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning,
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const char *symbol, bfd *abfd, asection *section,
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bfd_vma address)
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{
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warning (_("Compiled module \"%s\" section \"%s\": warning: %s"),
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bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
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xwarning);
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_undefined_symbol (struct bfd_link_info *link_info,
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const char *name, bfd *abfd, asection *section,
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bfd_vma address, bfd_boolean is_fatal)
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{
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warning (_("Cannot resolve relocation to \"%s\" "
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"from compiled module \"%s\" section \"%s\"."),
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name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_reloc_overflow (struct bfd_link_info *link_info,
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struct bfd_link_hash_entry *entry,
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const char *name, const char *reloc_name,
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bfd_vma addend, bfd *abfd, asection *section,
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bfd_vma address)
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{
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_reloc_dangerous (struct bfd_link_info *link_info,
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const char *message, bfd *abfd,
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asection *section, bfd_vma address)
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{
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warning (_("Compiled module \"%s\" section \"%s\": dangerous "
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"relocation: %s\n"),
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bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
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message);
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}
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/* Helper for link_callbacks callbacks vector. */
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static void
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link_callbacks_unattached_reloc (struct bfd_link_info *link_info,
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const char *name, bfd *abfd, asection *section,
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bfd_vma address)
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{
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warning (_("Compiled module \"%s\" section \"%s\": unattached "
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"relocation: %s\n"),
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bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
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name);
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}
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/* Helper for link_callbacks callbacks vector. */
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static void link_callbacks_einfo (const char *fmt, ...)
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ATTRIBUTE_PRINTF (1, 2);
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static void
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link_callbacks_einfo (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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std::string str = string_vprintf (fmt, ap);
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va_end (ap);
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warning (_("Compile module: warning: %s"), str.c_str ());
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}
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/* Helper for bfd_get_relocated_section_contents.
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Only these symbols are set by bfd_simple_get_relocated_section_contents
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but bfd/ seems to use even the NULL ones without checking them first. */
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static const struct bfd_link_callbacks link_callbacks =
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{
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NULL, /* add_archive_element */
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link_callbacks_multiple_definition, /* multiple_definition */
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NULL, /* multiple_common */
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NULL, /* add_to_set */
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NULL, /* constructor */
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link_callbacks_warning, /* warning */
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link_callbacks_undefined_symbol, /* undefined_symbol */
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link_callbacks_reloc_overflow, /* reloc_overflow */
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link_callbacks_reloc_dangerous, /* reloc_dangerous */
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link_callbacks_unattached_reloc, /* unattached_reloc */
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NULL, /* notice */
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link_callbacks_einfo, /* einfo */
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NULL, /* info */
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NULL, /* minfo */
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NULL, /* override_segment_assignment */
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};
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struct link_hash_table_cleanup_data
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{
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bfd *abfd;
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bfd *link_next;
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};
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/* Cleanup callback for struct bfd_link_info. */
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static void
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link_hash_table_free (void *d)
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{
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struct link_hash_table_cleanup_data *data
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= (struct link_hash_table_cleanup_data *) d;
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if (data->abfd->is_linker_output)
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(*data->abfd->link.hash->hash_table_free) (data->abfd);
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data->abfd->link.next = data->link_next;
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}
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/* Relocate and store into inferior memory each section SECT of ABFD. */
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static void
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copy_sections (bfd *abfd, asection *sect, void *data)
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{
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asymbol **symbol_table = (asymbol **) data;
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bfd_byte *sect_data, *sect_data_got;
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struct cleanup *cleanups;
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struct bfd_link_info link_info;
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struct bfd_link_order link_order;
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CORE_ADDR inferior_addr;
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struct link_hash_table_cleanup_data cleanup_data;
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if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD))
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!= (SEC_ALLOC | SEC_LOAD))
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return;
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if (bfd_get_section_size (sect) == 0)
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return;
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/* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB
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cannot use as it does not report relocations to undefined symbols. */
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memset (&link_info, 0, sizeof (link_info));
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link_info.output_bfd = abfd;
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link_info.input_bfds = abfd;
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link_info.input_bfds_tail = &abfd->link.next;
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cleanup_data.abfd = abfd;
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cleanup_data.link_next = abfd->link.next;
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abfd->link.next = NULL;
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link_info.hash = bfd_link_hash_table_create (abfd);
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cleanups = make_cleanup (link_hash_table_free, &cleanup_data);
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link_info.callbacks = &link_callbacks;
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memset (&link_order, 0, sizeof (link_order));
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link_order.next = NULL;
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link_order.type = bfd_indirect_link_order;
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link_order.offset = 0;
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link_order.size = bfd_get_section_size (sect);
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link_order.u.indirect.section = sect;
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sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect));
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make_cleanup (xfree, sect_data);
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sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info,
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&link_order, sect_data,
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FALSE, symbol_table);
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if (sect_data_got == NULL)
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error (_("Cannot map compiled module \"%s\" section \"%s\": %s"),
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bfd_get_filename (abfd), bfd_get_section_name (abfd, sect),
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bfd_errmsg (bfd_get_error ()));
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gdb_assert (sect_data_got == sect_data);
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inferior_addr = bfd_get_section_vma (abfd, sect);
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if (0 != target_write_memory (inferior_addr, sect_data,
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bfd_get_section_size (sect)))
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error (_("Cannot write compiled module \"%s\" section \"%s\" "
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"to inferior memory range %s-%s."),
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bfd_get_filename (abfd), bfd_get_section_name (abfd, sect),
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paddress (target_gdbarch (), inferior_addr),
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paddress (target_gdbarch (),
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inferior_addr + bfd_get_section_size (sect)));
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do_cleanups (cleanups);
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}
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/* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL
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symbols in OBJFILE so we can calculate how much memory to allocate
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for the out parameter. This avoids needing a malloc in the generated
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code. Throw an error if anything fails.
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GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE.
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If it finds user tries to print an array type this function returns
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NULL. Caller will then regenerate the code with
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COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it.
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This is because __auto_type array-to-pointer type conversion of
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COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE
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preserving the array type. */
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static struct type *
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get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
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enum compile_i_scope_types scope)
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{
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struct symbol *gdb_ptr_type_sym;
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/* Initialize it just to avoid a GCC false warning. */
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struct symbol *gdb_val_sym = NULL;
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struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval;
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/* Initialize it just to avoid a GCC false warning. */
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const struct block *block = NULL;
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const struct blockvector *bv;
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int nblocks = 0;
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int block_loop = 0;
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bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab);
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nblocks = BLOCKVECTOR_NBLOCKS (bv);
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gdb_ptr_type_sym = NULL;
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for (block_loop = 0; block_loop < nblocks; block_loop++)
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{
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struct symbol *function = NULL;
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const struct block *function_block;
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block = BLOCKVECTOR_BLOCK (bv, block_loop);
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if (BLOCK_FUNCTION (block) != NULL)
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continue;
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gdb_val_sym = block_lookup_symbol (block, COMPILE_I_EXPR_VAL, VAR_DOMAIN);
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if (gdb_val_sym == NULL)
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continue;
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function_block = block;
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while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)
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&& function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
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{
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function_block = BLOCK_SUPERBLOCK (function_block);
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function = BLOCK_FUNCTION (function_block);
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if (function != NULL)
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break;
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}
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if (function != NULL
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&& (BLOCK_SUPERBLOCK (function_block)
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== BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
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&& (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION)
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== 0))
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break;
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}
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if (block_loop == nblocks)
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error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
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gdb_type = SYMBOL_TYPE (gdb_val_sym);
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gdb_type = check_typedef (gdb_type);
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gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE,
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VAR_DOMAIN);
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if (gdb_ptr_type_sym == NULL)
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error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
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gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym);
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gdb_ptr_type = check_typedef (gdb_ptr_type);
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if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR)
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error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE);
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gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type);
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if (types_deeply_equal (gdb_type, gdb_type_from_ptr))
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{
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if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE)
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error (_("Expected address scope in compiled module \"%s\"."),
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objfile_name (objfile));
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return gdb_type;
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}
|
|
|
|
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;
|
|
struct setup_sections_data setup_sections_data;
|
|
CORE_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 compile_module *retval;
|
|
struct type *regs_type, *out_value_type = NULL;
|
|
char **matching;
|
|
struct objfile *objfile;
|
|
int expect_parameters;
|
|
struct type *expect_return_type;
|
|
struct munmap_list *munmap_list_head = NULL;
|
|
|
|
gdb::unique_xmalloc_ptr<char> filename
|
|
(tilde_expand (file_names.object_file ()));
|
|
|
|
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.get (), bfd_errmsg (bfd_get_error ()));
|
|
|
|
if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching))
|
|
error (_("\"%s\": not in loadable format: %s"),
|
|
filename.get (), gdb_bfd_errmsg (bfd_get_error (), matching));
|
|
|
|
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;
|
|
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.get ());
|
|
if (storage_needed < 0)
|
|
error (_("Cannot read symbols of compiled module \"%s\": %s"),
|
|
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. */
|
|
std::unique_ptr<struct objfile> objfile_holder
|
|
(symbol_file_add_from_bfd (abfd.get (), filename.get (),
|
|
0, NULL, 0, NULL));
|
|
objfile = objfile_holder.get ();
|
|
|
|
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.get (), symbol_table);
|
|
if (number_of_symbols < 0)
|
|
error (_("Cannot parse symbols of compiled module \"%s\": %s"),
|
|
filename.get (), 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.get ());
|
|
missing_symbols++;
|
|
}
|
|
}
|
|
if (missing_symbols)
|
|
error (_("%ld symbols were missing, cannot continue."), missing_symbols);
|
|
|
|
bfd_map_over_sections (abfd.get (), 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));
|
|
}
|
|
|
|
retval = XNEW (struct compile_module);
|
|
retval->objfile = objfile_holder.release ();
|
|
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;
|
|
}
|