+
+/*
+FUNCTION
+ bfd_convert_section_size
+
+SYNOPSIS
+ bfd_size_type bfd_convert_section_size
+ (bfd *ibfd, asection *isec, bfd *obfd, bfd_size_type size);
+
+DESCRIPTION
+ Convert the size @var{size} of the section @var{isec} in input
+ BFD @var{ibfd} to the section size in output BFD @var{obfd}.
+*/
+
+bfd_size_type
+bfd_convert_section_size (bfd *ibfd, sec_ptr isec, bfd *obfd,
+ bfd_size_type size)
+{
+ bfd_size_type hdr_size;
+
+ /* Do nothing if input file will be decompressed. */
+ if ((ibfd->flags & BFD_DECOMPRESS))
+ return size;
+
+ /* Do nothing if either input or output aren't ELF. */
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return size;
+
+ /* Do nothing if ELF classes of input and output are the same. */
+ if (get_elf_backend_data (ibfd)->s->elfclass
+ == get_elf_backend_data (obfd)->s->elfclass)
+ return size;
+
+ /* Do nothing if the input section isn't a SHF_COMPRESSED section. */
+ hdr_size = bfd_get_compression_header_size (ibfd, isec);
+ if (hdr_size == 0)
+ return size;
+
+ /* Adjust the size of the output SHF_COMPRESSED section. */
+ if (hdr_size == sizeof (Elf32_External_Chdr))
+ return (size - sizeof (Elf32_External_Chdr)
+ + sizeof (Elf64_External_Chdr));
+ else
+ return (size - sizeof (Elf64_External_Chdr)
+ + sizeof (Elf32_External_Chdr));
+}
+
+/*
+FUNCTION
+ bfd_convert_section_contents
+
+SYNOPSIS
+ bfd_boolean bfd_convert_section_contents
+ (bfd *ibfd, asection *isec, bfd *obfd,
+ bfd_byte **ptr, bfd_size_type *ptr_size);
+
+DESCRIPTION
+ Convert the contents, stored in @var{*ptr}, of the section
+ @var{isec} in input BFD @var{ibfd} to output BFD @var{obfd}
+ if needed. The original buffer pointed to by @var{*ptr} may
+ be freed and @var{*ptr} is returned with memory malloc'd by this
+ function, and the new size written to @var{ptr_size}.
+*/
+
+bfd_boolean
+bfd_convert_section_contents (bfd *ibfd, sec_ptr isec, bfd *obfd,
+ bfd_byte **ptr, bfd_size_type *ptr_size)
+{
+ bfd_byte *contents;
+ bfd_size_type ihdr_size, ohdr_size, size;
+ Elf_Internal_Chdr chdr;
+ bfd_boolean use_memmove;
+
+ /* Do nothing if input file will be decompressed. */
+ if ((ibfd->flags & BFD_DECOMPRESS))
+ return TRUE;
+
+ /* Do nothing if either input or output aren't ELF. */
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return TRUE;
+
+ /* Do nothing if ELF classes of input and output are the same. */
+ if (get_elf_backend_data (ibfd)->s->elfclass
+ == get_elf_backend_data (obfd)->s->elfclass)
+ return TRUE;
+
+ /* Do nothing if the input section isn't a SHF_COMPRESSED section. */
+ ihdr_size = bfd_get_compression_header_size (ibfd, isec);
+ if (ihdr_size == 0)
+ return TRUE;
+
+ contents = *ptr;
+
+ /* Convert the contents of the input SHF_COMPRESSED section to
+ output. Get the input compression header and the size of the
+ output compression header. */
+ if (ihdr_size == sizeof (Elf32_External_Chdr))
+ {
+ Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
+ chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
+ chdr.ch_size = bfd_get_32 (ibfd, &echdr->ch_size);
+ chdr.ch_addralign = bfd_get_32 (ibfd, &echdr->ch_addralign);
+
+ ohdr_size = sizeof (Elf64_External_Chdr);
+
+ use_memmove = FALSE;
+ }
+ else
+ {
+ Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
+ chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
+ chdr.ch_size = bfd_get_64 (ibfd, &echdr->ch_size);
+ chdr.ch_addralign = bfd_get_64 (ibfd, &echdr->ch_addralign);
+
+ ohdr_size = sizeof (Elf32_External_Chdr);
+ use_memmove = TRUE;
+ }
+
+ size = bfd_get_section_size (isec) - ihdr_size + ohdr_size;
+ if (!use_memmove)
+ {
+ contents = (bfd_byte *) bfd_malloc (size);
+ if (contents == NULL)
+ return FALSE;
+ }
+
+ /* Write out the output compression header. */
+ if (ohdr_size == sizeof (Elf32_External_Chdr))
+ {
+ Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
+ bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
+ bfd_put_32 (obfd, chdr.ch_size, &echdr->ch_size);
+ bfd_put_32 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
+ }
+ else
+ {
+ Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
+ bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
+ bfd_put_32 (obfd, 0, &echdr->ch_reserved);
+ bfd_put_64 (obfd, chdr.ch_size, &echdr->ch_size);
+ bfd_put_64 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
+ }
+
+ /* Copy the compressed contents. */
+ if (use_memmove)
+ memmove (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);
+ else
+ {
+ memcpy (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);
+ free (*ptr);
+ *ptr = contents;
+ }
+
+ *ptr_size = size;
+ return TRUE;
+}
projects / deliverable / binutils-gdb.git / blobdiff