/* Mach-O support for BFD.
- Copyright (C) 1999-2015 Free Software Foundation, Inc.
+ Copyright (C) 1999-2017 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
if (!bfd_mach_o_read_symtab_symbols (abfd))
{
- (*_bfd_error_handler)
+ _bfd_error_handler
(_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
return 0;
}
/* In addition to the need to byte-swap the symbol number, the bit positions
of the fields in the relocation information vary per target endian-ness. */
-static void
+void
bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
unsigned char *fields)
{
}
}
-static int
-bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
- struct mach_o_reloc_info_external *raw,
- arelent *res, asymbol **syms)
+/* Set syms_ptr_ptr and addend of RES. */
+
+bfd_boolean
+bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
+ bfd_mach_o_reloc_info *reloc,
+ arelent *res, asymbol **syms)
{
bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
- bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
- bfd_mach_o_reloc_info reloc;
- bfd_vma addr;
+ unsigned int num;
asymbol **sym;
+ /* Non-scattered relocation. */
+ reloc->r_scattered = 0;
+ res->addend = 0;
+
+ num = reloc->r_value;
+
+ if (reloc->r_extern)
+ {
+ /* PR 17512: file: 8396-1185-0.004. */
+ if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
+ sym = bfd_und_section_ptr->symbol_ptr_ptr;
+ else if (syms == NULL)
+ sym = bfd_und_section_ptr->symbol_ptr_ptr;
+ else
+ /* An external symbol number. */
+ sym = syms + num;
+ }
+ else if (num == 0x00ffffff || num == 0)
+ {
+ /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
+ is generic code, we don't know wether this is really a PAIR.
+ This value is almost certainly not a valid section number, hence
+ this specific case to avoid an assertion failure.
+ Target specific swap_reloc_in routine should adjust that. */
+ sym = bfd_abs_section_ptr->symbol_ptr_ptr;
+ }
+ else
+ {
+ /* PR 17512: file: 006-2964-0.004. */
+ if (num > mdata->nsects)
+ return FALSE;
+
+ /* A section number. */
+ sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
+ /* For a symbol defined in section S, the addend (stored in the
+ binary) contains the address of the section. To comply with
+ bfd convention, subtract the section address.
+ Use the address from the header, so that the user can modify
+ the vma of the section. */
+ res->addend = -mdata->sections[num - 1]->addr;
+ }
+
+ /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
+ in the lower 16bits of the address value. So we have to find the
+ 'symbol' from the preceding reloc. We do this even though the
+ section symbol is probably not needed here, because NULL symbol
+ values cause an assert in generic BFD code. This must be done in
+ the PPC swap_reloc_in routine. */
+ res->sym_ptr_ptr = sym;
+
+ return TRUE;
+}
+
+/* Do most of the work for canonicalize_relocs on RAW: create internal
+ representation RELOC and set most fields of RES using symbol table SYMS.
+ Each target still has to set the howto of RES and possibly adjust other
+ fields.
+ Previously the Mach-O hook point was simply swap_in, but some targets
+ (like arm64) don't follow the generic rules (symnum is a value for the
+ non-scattered relocation ADDEND). */
+
+bfd_boolean
+bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
+ struct mach_o_reloc_info_external *raw,
+ bfd_mach_o_reloc_info *reloc,
+ arelent *res, asymbol **syms)
+{
+ bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
+ bfd_vma addr;
+
addr = bfd_get_32 (abfd, raw->r_address);
res->sym_ptr_ptr = NULL;
res->addend = 0;
bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
/* Scattered relocation, can't be extern. */
- reloc.r_scattered = 1;
- reloc.r_extern = 0;
+ reloc->r_scattered = 1;
+ reloc->r_extern = 0;
/* Extract section and offset from r_value (symnum). */
- reloc.r_value = symnum;
+ reloc->r_value = symnum;
/* FIXME: This breaks when a symbol in a reloc exactly follows the
end of the data for the section (e.g. in a calculation of section
data length). At present, the symbol will end up associated with
}
/* Extract the info and address fields from r_address. */
- reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
- reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
- reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
- reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
+ reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
+ reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
+ reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
+ reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
}
else
{
- unsigned int num;
-
/* Non-scattered relocation. */
- reloc.r_scattered = 0;
+ reloc->r_scattered = 0;
+ reloc->r_address = addr;
+ res->address = addr;
/* The value and info fields have to be extracted dependent on target
endian-ness. */
- bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
- num = reloc.r_value;
+ bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
- if (reloc.r_extern)
- {
- /* PR 17512: file: 8396-1185-0.004. */
- if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
- sym = bfd_und_section_ptr->symbol_ptr_ptr;
- else if (syms == NULL)
- sym = bfd_und_section_ptr->symbol_ptr_ptr;
- else
- /* An external symbol number. */
- sym = syms + num;
- }
- else if (num == 0x00ffffff || num == 0)
- {
- /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
- is generic code, we don't know wether this is really a PAIR.
- This value is almost certainly not a valid section number, hence
- this specific case to avoid an assertion failure.
- Target specific swap_reloc_in routine should adjust that. */
- sym = bfd_abs_section_ptr->symbol_ptr_ptr;
- }
- else
- {
- /* PR 17512: file: 006-2964-0.004. */
- if (num > mdata->nsects)
- return -1;
-
- /* A section number. */
- sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
- /* For a symbol defined in section S, the addend (stored in the
- binary) contains the address of the section. To comply with
- bfd convention, subtract the section address.
- Use the address from the header, so that the user can modify
- the vma of the section. */
- res->addend = -mdata->sections[num - 1]->addr;
- }
- /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
- in the lower 16bits of the address value. So we have to find the
- 'symbol' from the preceding reloc. We do this even though the
- section symbol is probably not needed here, because NULL symbol
- values cause an assert in generic BFD code. This must be done in
- the PPC swap_reloc_in routine. */
- res->sym_ptr_ptr = sym;
-
- /* The 'address' is just r_address.
- ??? maybe this should be masked with 0xffffff for safety. */
- res->address = addr;
- reloc.r_address = addr;
+ if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
+ res, syms))
+ return FALSE;
}
/* We have set up a reloc with all the information present, so the swapper
can modify address, value and addend fields, if necessary, to convey
information in the generic BFD reloc that is mach-o specific. */
- if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
- return -1;
-
- return 0;
+ return TRUE;
}
static int
unsigned long count,
arelent *res, asymbol **syms)
{
+ bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
unsigned long i;
struct mach_o_reloc_info_external *native_relocs;
bfd_size_type native_size;
for (i = 0; i < count; i++)
{
- if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
- &res[i], syms) < 0)
+ if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
+ &res[i], syms, res))
goto err;
}
free (native_relocs);
return 0;
/* No need to go further if we don't know how to read relocs. */
- if (bed->_bfd_mach_o_swap_reloc_in == NULL)
+ if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
return 0;
if (asect->relocation == NULL)
return 0;
/* No need to go further if we don't know how to read relocs. */
- if (bed->_bfd_mach_o_swap_reloc_in == NULL)
+ if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
return 0;
if (mdata->dyn_reloc_cache == NULL)
if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
goto err;
- if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
+ if (!_bfd_stringtab_emit (abfd, strtab))
goto err;
/* Pad string table. */
|| cmd->ntoc != 0
|| cmd->nextrefsyms != 0)
{
- (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
- " implemented for dysymtab commands."));
+ _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
+ " implemented for dysymtab commands."));
return FALSE;
}
/* We need to check that this can be done... */
if (nsect > 255)
{
- (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
- " maximum is 255,\n"), nsect);
+ _bfd_error_handler (_("mach-o: there are too many sections (%u)"
+ " maximum is 255,\n"), nsect);
return FALSE;
}
/* Nothing to do. */
break;
default:
- (*_bfd_error_handler)
- (_("unable to allocate data for load command 0x%lx"),
- (unsigned long) cmd->type);
+ _bfd_error_handler
+ (_("unable to allocate data for load command %#x"),
+ cmd->type);
break;
}
return FALSE;
break;
default:
- (*_bfd_error_handler)
- (_("unable to write unknown load command 0x%lx"),
- (unsigned long) cmd->type);
+ _bfd_error_handler
+ (_("unable to write unknown load command %#x"),
+ cmd->type);
return FALSE;
}
}
if (s->addr < vma)
{
- (*_bfd_error_handler)
- (_("section address (%lx) below start of segment (%lx)"),
- (unsigned long) s->addr, (unsigned long) vma);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("section address (%#Lx) below start of segment (%#Lx)"),
+ s->addr, vma);
return FALSE;
}
+ BFD_MACH_O_LC_SIZE;
break;
default:
- (*_bfd_error_handler)
- (_("unable to layout unknown load command 0x%lx"),
- (unsigned long) cmd->type);
+ _bfd_error_handler
+ (_("unable to layout unknown load command %#x"),
+ cmd->type);
ret = FALSE;
break;
}
/* PR 17512: file: 0017eb76. */
if (section->align > 64)
{
- (*_bfd_error_handler) (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, using 32 instead"),
- section->align);
+ _bfd_error_handler
+ (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
+ "using 32 instead"), section->align);
section->align = 32;
}
section->reloff = bfd_h_get_32 (abfd, raw.reloff);
section->align = bfd_h_get_32 (abfd, raw.align);
if (section->align > 64)
{
- (*_bfd_error_handler) (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, using 32 instead"),
- section->align);
+ _bfd_error_handler
+ (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
+ "using 32 instead"), section->align);
section->align = 32;
}
section->reloff = bfd_h_get_32 (abfd, raw.reloff);
if (bfd_seek (abfd, symoff, SEEK_SET) != 0
|| bfd_bread (&raw, symwidth, abfd) != symwidth)
{
- (*_bfd_error_handler)
- (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
- symwidth, (unsigned long) symoff);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
+ symwidth, symoff);
return FALSE;
}
if (stroff >= sym->strsize)
{
- (*_bfd_error_handler)
- (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
- (unsigned long) stroff,
- (unsigned long) sym->strsize);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
+ stroff,
+ sym->strsize);
return FALSE;
}
/* Mach-O uses 0 to mean "no section"; not an error. */
if (section != 0)
{
- (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
- "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
- s->symbol.name, section, mdata->nsects);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("bfd_mach_o_read_symtab_symbol: "
+ "symbol \"%s\" specified invalid section %d (max %lu): "
+ "setting to undefined"),
+ s->symbol.name, section, mdata->nsects);
}
s->symbol.section = bfd_und_section_ptr;
}
s->symbol.value = 0;
break;
default:
- (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
- "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
- s->symbol.name, symtype);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("bfd_mach_o_read_symtab_symbol: "
+ "symbol \"%s\" specified invalid type field 0x%x: "
+ "setting to undefined"), s->symbol.name, symtype);
s->symbol.section = bfd_und_section_ptr;
break;
}
}
else
{
+ /* See PR 21840 for a reproducer. */
+ if ((sym->strsize + 1) == 0)
+ return FALSE;
sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
if (sym->strtab == NULL)
return FALSE;
sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
if (sym->symbols == NULL)
{
- (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
+ _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
+ "unable to allocate memory for symbols"));
sym->nsyms = 0;
return FALSE;
}
break;
default:
command->len = 0;
- (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
- abfd, (unsigned long) command->type);
+ _bfd_error_handler (_("%B: unknown load command %#x"),
+ abfd, command->type);
return FALSE;
}
&cputype, &cpusubtype);
if (cputype == bfd_arch_unknown)
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
header->cputype, header->cpusubtype);
return FALSE;
if (! (header.byteorder == BFD_ENDIAN_BIG
|| header.byteorder == BFD_ENDIAN_LITTLE))
{
- (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
- (unsigned long) header.byteorder);
+ _bfd_error_handler (_("unknown header byte-order value %#x"),
+ header.byteorder);
goto wrong;
}
static bfd_mach_o_uuid_command *
bfd_mach_o_lookup_uuid_command (bfd *abfd)
{
- bfd_mach_o_load_command *uuid_cmd;
+ bfd_mach_o_load_command *uuid_cmd = NULL;
int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
- if (ncmd != 1)
+ if (ncmd != 1 || uuid_cmd == NULL)
return FALSE;
return &uuid_cmd->command.uuid;
}
if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
return NULL;
- if (abfd->my_archive)
+ if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
base_bfd = abfd->my_archive;
/* BFD may have been opened from a stream. */
if (base_bfd->filename == NULL)
if (mdata->dsym_bfd != NULL)
{
bfd *fat_bfd = mdata->dsym_bfd->my_archive;
+#if 0
+ /* FIXME: PR 19435: This calculation to find the memory allocated by
+ bfd_mach_o_follow_dsym for the filename does not always end up
+ selecting the correct pointer. Unfortunately this problem is
+ very hard to reproduce on a non Mach-O native system, so until it
+ can be traced and fixed on such a system, this code will remain
+ commented out. This does mean that there will be a memory leak,
+ but it is small, and happens when we are closing down, so it
+ should not matter too much. */
char *dsym_filename = (char *)(fat_bfd
? fat_bfd->filename
: mdata->dsym_bfd->filename);
+#endif
bfd_close (mdata->dsym_bfd);
mdata->dsym_bfd = NULL;
if (fat_bfd)
bfd_close (fat_bfd);
+#if 0
free (dsym_filename);
+#endif
}
}
#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
-#define bfd_mach_o_swap_reloc_in NULL
+#define bfd_mach_o_canonicalize_one_reloc NULL
#define bfd_mach_o_swap_reloc_out NULL
#define bfd_mach_o_print_thread NULL
#define bfd_mach_o_tgt_seg_table NULL
projects / deliverable / binutils-gdb.git / blobdiff