diff options
Diffstat (limited to 'bfd/elf32-arm.h')
| -rw-r--r-- | bfd/elf32-arm.h | 119 |
1 files changed, 116 insertions, 3 deletions
diff --git a/bfd/elf32-arm.h b/bfd/elf32-arm.h index 509b4815574..417284b3169 100644 --- a/bfd/elf32-arm.h +++ b/bfd/elf32-arm.h @@ -2119,10 +2119,43 @@ static bfd_boolean elf32_arm_object_p (abfd) bfd *abfd; { - /* XXX - we ought to examine a .note section here. */ + asection * arm_arch_section; - if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) - bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); + arm_arch_section = bfd_get_section_by_name (abfd, ARM_NOTE_SECTION); + + if (arm_arch_section) + { + char buffer [4]; + unsigned long arm_mach; + + if (! bfd_get_section_contents (abfd, arm_arch_section, buffer, + (file_ptr) 0, sizeof buffer)) + (*_bfd_error_handler) + (_("%s: warning: unable to retrieve %s section from %s"), + ARM_NOTE_SECTION, bfd_get_filename (abfd)); + else + { + /* We have to extract the value this way to allow for a + host whose endian-ness is different from the target. */ + arm_mach = bfd_get_32 (abfd, buffer); + bfd_default_set_arch_mach (abfd, bfd_arch_arm, arm_mach); + + if (bfd_get_arch (abfd) == bfd_arch_arm) + return TRUE; + + /* If the set failed for some reason, do not leave the architecture + type as 0 (unknown), but issue a warning message and force it to + be set to bfd_arch_arm. */ + (*_bfd_error_handler) + (_("%s: warning: unrecognized ARM machine number: %x"), + bfd_get_filename (abfd), arm_mach); + } + } + else + { + if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) + bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); + } return TRUE; } @@ -2263,6 +2296,25 @@ elf32_arm_merge_private_bfd_data (ibfd, obfd) return TRUE; } + if (bfd_get_mach (obfd) && bfd_get_mach (obfd) != bfd_get_mach (ibfd)) + { + /* For now, allow an output file type of 'xscale' if the + input file type is 'iWMMXt'. This means that we will + not have to build an entire iWMMXt enabled set of libraries + just to test a iWMMXt enabled binary. Change the output + type to iWMMXt though. Similarly allow 'xscale' binaries + to be linked into a 'iWMMXt' output binary. */ + if ( bfd_get_mach (obfd) == bfd_mach_arm_XScale + && bfd_get_mach (ibfd) == bfd_mach_arm_iWMMXt) + bfd_set_arch_mach (obfd, bfd_get_arch (obfd), bfd_mach_arm_iWMMXt); + else if ( bfd_get_mach (ibfd) != bfd_mach_arm_XScale + || bfd_get_mach (obfd) != bfd_mach_arm_iWMMXt) + { + bfd_set_error (bfd_error_wrong_format); + return FALSE; + } + } + /* Identical flags must be compatible. */ if (in_flags == out_flags) return TRUE; @@ -3660,6 +3712,65 @@ elf32_arm_reloc_type_class (rela) } } +static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, Elf_Internal_Shdr *)); +static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean)); + +/* Set the right machine number for an Arm ELF file. */ + +static bfd_boolean +elf32_arm_section_flags (flags, hdr) + flagword *flags; + Elf_Internal_Shdr *hdr; +{ + if (hdr->sh_type == SHT_NOTE) + *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; + + return TRUE; +} + +void +elf32_arm_final_write_processing (abfd, linker) + bfd *abfd; + bfd_boolean linker ATTRIBUTE_UNUSED; +{ + asection * arm_arch_section; + char buffer [4]; + unsigned long arm_mach; + + /* Look for a .note.arm.ident section. If one is present check + the machine number encoded in it, and set it to the current + machine number if it is different. This allows XScale and + iWMMXt binaries to be merged and the resulting output to be set + to iWMMXt, even if the first input file had an XScale .note. */ + + arm_arch_section = bfd_get_section_by_name (abfd, ARM_NOTE_SECTION); + + if (arm_arch_section == NULL) + return; + + if (! bfd_get_section_contents (abfd, arm_arch_section, buffer, + (file_ptr) 0, sizeof buffer)) + /* If the ident section does not exist then just skip this check. */ + return; + + /* We have to extract the value this way to allow for a + host whose endian-ness is different from the target. */ + arm_mach = bfd_get_32 (abfd, buffer); + + if (arm_mach == bfd_get_mach (abfd)) + return; + + bfd_put_32 (abfd, bfd_get_mach (abfd), buffer); + + if (! bfd_set_section_contents (abfd, arm_arch_section, buffer, + (file_ptr) 0, sizeof buffer)) + (*_bfd_error_handler) + (_("warning: unable to update contents of %s section in %s"), + ARM_NOTE_SECTION, bfd_get_filename (abfd)); + + return; +} + #define ELF_ARCH bfd_arch_arm #define ELF_MACHINE_CODE EM_ARM #define ELF_MAXPAGESIZE 0x8000 @@ -3685,6 +3796,8 @@ elf32_arm_reloc_type_class (rela) #define elf_backend_post_process_headers elf32_arm_post_process_headers #define elf_backend_reloc_type_class elf32_arm_reloc_type_class #define elf_backend_object_p elf32_arm_object_p +#define elf_backend_section_flags elf32_arm_section_flags +#define elf_backend_final_write_processing elf32_arm_final_write_processing #define elf_backend_can_gc_sections 1 #define elf_backend_plt_readonly 1 |