| /* BFD support for the ARM processor |
| Copyright (C) 1994-2024 Free Software Foundation, Inc. |
| Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| 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, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "libiberty.h" |
| #include "cpu-arm.h" |
| |
| /* This routine is provided two arch_infos and works out which ARM |
| machine which would be compatible with both and returns a pointer |
| to its info structure. */ |
| |
| static const bfd_arch_info_type * |
| compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b) |
| { |
| /* If a & b are for different architecture we can do nothing. */ |
| if (a->arch != b->arch) |
| return NULL; |
| |
| /* If a & b are for the same machine then all is well. */ |
| if (a->mach == b->mach) |
| return a; |
| |
| /* Otherwise if either a or b is the 'default' machine |
| then it can be polymorphed into the other. */ |
| if (a->the_default) |
| return b; |
| |
| if (b->the_default) |
| return a; |
| |
| /* So far all newer ARM architecture cores are |
| supersets of previous cores. */ |
| if (a->mach < b->mach) |
| return b; |
| else if (a->mach > b->mach) |
| return a; |
| |
| /* Never reached! */ |
| return NULL; |
| } |
| |
| static struct |
| { |
| unsigned int mach; |
| char * name; |
| } |
| processors[] = |
| { |
| { bfd_mach_arm_2, "arm2" }, |
| { bfd_mach_arm_2a, "arm250" }, |
| { bfd_mach_arm_2a, "arm3" }, |
| { bfd_mach_arm_3, "arm6" }, |
| { bfd_mach_arm_3, "arm60" }, |
| { bfd_mach_arm_3, "arm600" }, |
| { bfd_mach_arm_3, "arm610" }, |
| { bfd_mach_arm_3, "arm620" }, |
| { bfd_mach_arm_3, "arm7" }, |
| { bfd_mach_arm_3, "arm70" }, |
| { bfd_mach_arm_3, "arm700" }, |
| { bfd_mach_arm_3, "arm700i" }, |
| { bfd_mach_arm_3, "arm710" }, |
| { bfd_mach_arm_3, "arm7100" }, |
| { bfd_mach_arm_3, "arm710c" }, |
| { bfd_mach_arm_4T, "arm710t" }, |
| { bfd_mach_arm_3, "arm720" }, |
| { bfd_mach_arm_4T, "arm720t" }, |
| { bfd_mach_arm_4T, "arm740t" }, |
| { bfd_mach_arm_3, "arm7500" }, |
| { bfd_mach_arm_3, "arm7500fe" }, |
| { bfd_mach_arm_3, "arm7d" }, |
| { bfd_mach_arm_3, "arm7di" }, |
| { bfd_mach_arm_3M, "arm7dm" }, |
| { bfd_mach_arm_3M, "arm7dmi" }, |
| { bfd_mach_arm_4T, "arm7t" }, |
| { bfd_mach_arm_4T, "arm7tdmi" }, |
| { bfd_mach_arm_4T, "arm7tdmi-s" }, |
| { bfd_mach_arm_3M, "arm7m" }, |
| { bfd_mach_arm_4, "arm8" }, |
| { bfd_mach_arm_4, "arm810" }, |
| { bfd_mach_arm_4, "arm9" }, |
| { bfd_mach_arm_4T, "arm920" }, |
| { bfd_mach_arm_4T, "arm920t" }, |
| { bfd_mach_arm_4T, "arm922t" }, |
| { bfd_mach_arm_5TEJ, "arm926ej" }, |
| { bfd_mach_arm_5TEJ, "arm926ejs" }, |
| { bfd_mach_arm_5TEJ, "arm926ej-s" }, |
| { bfd_mach_arm_4T, "arm940t" }, |
| { bfd_mach_arm_5TE, "arm946e" }, |
| { bfd_mach_arm_5TE, "arm946e-r0" }, |
| { bfd_mach_arm_5TE, "arm946e-s" }, |
| { bfd_mach_arm_5TE, "arm966e" }, |
| { bfd_mach_arm_5TE, "arm966e-r0" }, |
| { bfd_mach_arm_5TE, "arm966e-s" }, |
| { bfd_mach_arm_5TE, "arm968e-s" }, |
| { bfd_mach_arm_5TE, "arm9e" }, |
| { bfd_mach_arm_5TE, "arm9e-r0" }, |
| { bfd_mach_arm_4T, "arm9tdmi" }, |
| { bfd_mach_arm_5TE, "arm1020" }, |
| { bfd_mach_arm_5T, "arm1020t" }, |
| { bfd_mach_arm_5TE, "arm1020e" }, |
| { bfd_mach_arm_5TE, "arm1022e" }, |
| { bfd_mach_arm_5TEJ, "arm1026ejs" }, |
| { bfd_mach_arm_5TEJ, "arm1026ej-s" }, |
| { bfd_mach_arm_5TE, "arm10e" }, |
| { bfd_mach_arm_5T, "arm10t" }, |
| { bfd_mach_arm_5T, "arm10tdmi" }, |
| { bfd_mach_arm_6, "arm1136j-s" }, |
| { bfd_mach_arm_6, "arm1136js" }, |
| { bfd_mach_arm_6, "arm1136jf-s" }, |
| { bfd_mach_arm_6, "arm1136jfs" }, |
| { bfd_mach_arm_6KZ, "arm1176jz-s" }, |
| { bfd_mach_arm_6KZ, "arm1176jzf-s" }, |
| { bfd_mach_arm_6T2, "arm1156t2-s" }, |
| { bfd_mach_arm_6T2, "arm1156t2f-s" }, |
| { bfd_mach_arm_7, "cortex-a5" }, |
| { bfd_mach_arm_7, "cortex-a7" }, |
| { bfd_mach_arm_7, "cortex-a8" }, |
| { bfd_mach_arm_7, "cortex-a9" }, |
| { bfd_mach_arm_7, "cortex-a12" }, |
| { bfd_mach_arm_7, "cortex-a15" }, |
| { bfd_mach_arm_7, "cortex-a17" }, |
| { bfd_mach_arm_8, "cortex-a32" }, |
| { bfd_mach_arm_8, "cortex-a35" }, |
| { bfd_mach_arm_8, "cortex-a53" }, |
| { bfd_mach_arm_8, "cortex-a55" }, |
| { bfd_mach_arm_8, "cortex-a57" }, |
| { bfd_mach_arm_8, "cortex-a72" }, |
| { bfd_mach_arm_8, "cortex-a73" }, |
| { bfd_mach_arm_8, "cortex-a75" }, |
| { bfd_mach_arm_8, "cortex-a76" }, |
| { bfd_mach_arm_8, "cortex-a76ae" }, |
| { bfd_mach_arm_8, "cortex-a77" }, |
| { bfd_mach_arm_8, "cortex-a78" }, |
| { bfd_mach_arm_8, "cortex-a78ae" }, |
| { bfd_mach_arm_8, "cortex-a78c" }, |
| { bfd_mach_arm_6SM, "cortex-m0" }, |
| { bfd_mach_arm_6SM, "cortex-m0plus" }, |
| { bfd_mach_arm_6SM, "cortex-m1" }, |
| { bfd_mach_arm_8M_BASE, "cortex-m23" }, |
| { bfd_mach_arm_7, "cortex-m3" }, |
| { bfd_mach_arm_8M_MAIN, "cortex-m33" }, |
| { bfd_mach_arm_8M_MAIN, "cortex-m35p" }, |
| { bfd_mach_arm_7EM, "cortex-m4" }, |
| { bfd_mach_arm_7EM, "cortex-m7" }, |
| { bfd_mach_arm_7, "cortex-r4" }, |
| { bfd_mach_arm_7, "cortex-r4f" }, |
| { bfd_mach_arm_7, "cortex-r5" }, |
| { bfd_mach_arm_8R, "cortex-r52" }, |
| { bfd_mach_arm_8R, "cortex-r52plus" }, |
| { bfd_mach_arm_7, "cortex-r7" }, |
| { bfd_mach_arm_7, "cortex-r8" }, |
| { bfd_mach_arm_8, "cortex-x1" }, |
| { bfd_mach_arm_8, "cortex-x1c" }, |
| { bfd_mach_arm_4T, "ep9312" }, |
| { bfd_mach_arm_8, "exynos-m1" }, |
| { bfd_mach_arm_4, "fa526" }, |
| { bfd_mach_arm_5TE, "fa606te" }, |
| { bfd_mach_arm_5TE, "fa616te" }, |
| { bfd_mach_arm_4, "fa626" }, |
| { bfd_mach_arm_5TE, "fa626te" }, |
| { bfd_mach_arm_5TE, "fa726te" }, |
| { bfd_mach_arm_5TE, "fmp626" }, |
| { bfd_mach_arm_XScale, "i80200" }, |
| { bfd_mach_arm_7, "marvell-pj4" }, |
| { bfd_mach_arm_7, "marvell-whitney" }, |
| { bfd_mach_arm_6K, "mpcore" }, |
| { bfd_mach_arm_6K, "mpcorenovfp" }, |
| { bfd_mach_arm_4, "sa1" }, |
| { bfd_mach_arm_4, "strongarm" }, |
| { bfd_mach_arm_4, "strongarm1" }, |
| { bfd_mach_arm_4, "strongarm110" }, |
| { bfd_mach_arm_4, "strongarm1100" }, |
| { bfd_mach_arm_4, "strongarm1110" }, |
| { bfd_mach_arm_XScale, "xscale" }, |
| { bfd_mach_arm_8, "xgene1" }, |
| { bfd_mach_arm_8, "xgene2" }, |
| { bfd_mach_arm_9, "cortex-a710" }, |
| { bfd_mach_arm_iWMMXt, "iwmmxt" }, |
| { bfd_mach_arm_iWMMXt2, "iwmmxt2" }, |
| { bfd_mach_arm_unknown, "arm_any" } |
| }; |
| |
| static bool |
| scan (const struct bfd_arch_info *info, const char *string) |
| { |
| int i; |
| |
| /* First test for an exact match. */ |
| if (strcasecmp (string, info->printable_name) == 0) |
| return true; |
| |
| /* If there is a prefix of "arm:" then skip it. */ |
| const char * colon; |
| if ((colon = strchr (string, ':')) != NULL) |
| { |
| if (strncasecmp (string, "arm", colon - string) != 0) |
| return false; |
| string = colon + 1; |
| } |
| |
| /* Next check for a processor name instead of an Architecture name. */ |
| for (i = sizeof (processors) / sizeof (processors[0]); i--;) |
| { |
| if (strcasecmp (string, processors [i].name) == 0) |
| break; |
| } |
| |
| if (i != -1 && info->mach == processors [i].mach) |
| return true; |
| |
| /* Finally check for the default architecture. */ |
| if (strcasecmp (string, "arm") == 0) |
| return info->the_default; |
| |
| return false; |
| } |
| |
| #define N(number, print, default, next) \ |
| { 32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, \ |
| scan, bfd_arch_default_fill, next, 0 } |
| |
| static const bfd_arch_info_type arch_info_struct[] = |
| { |
| N (bfd_mach_arm_2, "armv2", false, & arch_info_struct[1]), |
| N (bfd_mach_arm_2a, "armv2a", false, & arch_info_struct[2]), |
| N (bfd_mach_arm_3, "armv3", false, & arch_info_struct[3]), |
| N (bfd_mach_arm_3M, "armv3m", false, & arch_info_struct[4]), |
| N (bfd_mach_arm_4, "armv4", false, & arch_info_struct[5]), |
| N (bfd_mach_arm_4T, "armv4t", false, & arch_info_struct[6]), |
| N (bfd_mach_arm_5, "armv5", false, & arch_info_struct[7]), |
| N (bfd_mach_arm_5T, "armv5t", false, & arch_info_struct[8]), |
| N (bfd_mach_arm_5TE, "armv5te", false, & arch_info_struct[9]), |
| N (bfd_mach_arm_XScale, "xscale", false, & arch_info_struct[10]), |
| N (bfd_mach_arm_iWMMXt, "iwmmxt", false, & arch_info_struct[11]), |
| N (bfd_mach_arm_iWMMXt2, "iwmmxt2", false, & arch_info_struct[12]), |
| N (bfd_mach_arm_5TEJ, "armv5tej", false, & arch_info_struct[13]), |
| N (bfd_mach_arm_6, "armv6", false, & arch_info_struct[14]), |
| N (bfd_mach_arm_6KZ, "armv6kz", false, & arch_info_struct[15]), |
| N (bfd_mach_arm_6T2, "armv6t2", false, & arch_info_struct[16]), |
| N (bfd_mach_arm_6K, "armv6k", false, & arch_info_struct[17]), |
| N (bfd_mach_arm_7, "armv7", false, & arch_info_struct[18]), |
| N (bfd_mach_arm_6M, "armv6-m", false, & arch_info_struct[19]), |
| N (bfd_mach_arm_6SM, "armv6s-m", false, & arch_info_struct[20]), |
| N (bfd_mach_arm_7EM, "armv7e-m", false, & arch_info_struct[21]), |
| N (bfd_mach_arm_8, "armv8-a", false, & arch_info_struct[22]), |
| N (bfd_mach_arm_8R, "armv8-r", false, & arch_info_struct[23]), |
| N (bfd_mach_arm_8M_BASE, "armv8-m.base", false, & arch_info_struct[24]), |
| N (bfd_mach_arm_8M_MAIN, "armv8-m.main", false, & arch_info_struct[25]), |
| N (bfd_mach_arm_8_1M_MAIN, "armv8.1-m.main", false, & arch_info_struct[26]), |
| N (bfd_mach_arm_9, "armv9-a", false, & arch_info_struct[27]), |
| N (bfd_mach_arm_unknown, "arm_any", false, NULL) |
| }; |
| |
| const bfd_arch_info_type bfd_arm_arch = |
| N (0, "arm", true, & arch_info_struct[0]); |
| |
| /* Support functions used by both the COFF and ELF versions of the ARM port. */ |
| |
| /* Handle the merging of the 'machine' settings of input file IBFD |
| and an output file OBFD. These values actually represent the |
| different possible ARM architecture variants. |
| Returns TRUE if they were merged successfully or FALSE otherwise. */ |
| |
| bool |
| bfd_arm_merge_machines (bfd *ibfd, bfd *obfd) |
| { |
| unsigned int in = bfd_get_mach (ibfd); |
| unsigned int out = bfd_get_mach (obfd); |
| |
| /* If the output architecture is unknown, we now have a value to set. */ |
| if (out == bfd_mach_arm_unknown) |
| bfd_set_arch_mach (obfd, bfd_arch_arm, in); |
| |
| /* If the input architecture is unknown, |
| then so must be the output architecture. */ |
| else if (in == bfd_mach_arm_unknown) |
| /* FIXME: We ought to have some way to |
| override this on the command line. */ |
| bfd_set_arch_mach (obfd, bfd_arch_arm, bfd_mach_arm_unknown); |
| |
| /* If they are the same then nothing needs to be done. */ |
| else if (out == in) |
| ; |
| |
| /* Otherwise the general principle that a earlier architecture can be |
| linked with a later architecture to produce a binary that will execute |
| on the later architecture. */ |
| else if (in > out) |
| bfd_set_arch_mach (obfd, bfd_arch_arm, in); |
| /* else |
| Nothing to do. */ |
| |
| return true; |
| } |
| |
| typedef struct |
| { |
| unsigned char namesz[4]; /* Size of entry's owner string. */ |
| unsigned char descsz[4]; /* Size of the note descriptor. */ |
| unsigned char type[4]; /* Interpretation of the descriptor. */ |
| char name[1]; /* Start of the name+desc data. */ |
| } arm_Note; |
| |
| static bool |
| arm_check_note (bfd *abfd, |
| bfd_byte *buffer, |
| bfd_size_type buffer_size, |
| const char *expected_name, |
| char **description_return) |
| { |
| unsigned long namesz; |
| unsigned long descsz; |
| unsigned long type; |
| char * descr; |
| |
| if (buffer_size < offsetof (arm_Note, name)) |
| return false; |
| |
| /* We have to extract the values this way to allow for a |
| host whose endian-ness is different from the target. */ |
| namesz = bfd_get_32 (abfd, buffer); |
| descsz = bfd_get_32 (abfd, buffer + offsetof (arm_Note, descsz)); |
| type = bfd_get_32 (abfd, buffer + offsetof (arm_Note, type)); |
| descr = (char *) buffer + offsetof (arm_Note, name); |
| |
| /* Check for buffer overflow. */ |
| if (namesz + descsz + offsetof (arm_Note, name) > buffer_size) |
| return false; |
| |
| if (expected_name == NULL) |
| { |
| if (namesz != 0) |
| return false; |
| } |
| else |
| { |
| if (namesz != ((strlen (expected_name) + 1 + 3) & ~3)) |
| return false; |
| |
| if (strcmp (descr, expected_name) != 0) |
| return false; |
| |
| descr += (namesz + 3) & ~3; |
| } |
| |
| /* FIXME: We should probably check the type as well. */ |
| (void) type; |
| |
| if (description_return != NULL) |
| * description_return = descr; |
| |
| return true; |
| } |
| |
| #define NOTE_ARCH_STRING "arch: " |
| |
| bool |
| bfd_arm_update_notes (bfd *abfd, const char *note_section) |
| { |
| asection * arm_arch_section; |
| bfd_size_type buffer_size; |
| bfd_byte * buffer; |
| char * arch_string; |
| char * expected; |
| |
| /* Look for a note section. If one is present check the architecture |
| string encoded in it, and set it to the current architecture if it is |
| different. */ |
| arm_arch_section = bfd_get_section_by_name (abfd, note_section); |
| |
| if (arm_arch_section == NULL |
| || (arm_arch_section->flags & SEC_HAS_CONTENTS) == 0) |
| return true; |
| |
| buffer_size = arm_arch_section->size; |
| if (buffer_size == 0) |
| return false; |
| |
| if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer)) |
| goto FAIL; |
| |
| /* Parse the note. */ |
| if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string)) |
| goto FAIL; |
| |
| /* Check the architecture in the note against the architecture of the bfd. |
| Newer architectures versions should not be added here as build attribute |
| are a better mechanism to convey ISA used. */ |
| switch (bfd_get_mach (abfd)) |
| { |
| default: |
| case bfd_mach_arm_unknown: expected = "unknown"; break; |
| case bfd_mach_arm_2: expected = "armv2"; break; |
| case bfd_mach_arm_2a: expected = "armv2a"; break; |
| case bfd_mach_arm_3: expected = "armv3"; break; |
| case bfd_mach_arm_3M: expected = "armv3M"; break; |
| case bfd_mach_arm_4: expected = "armv4"; break; |
| case bfd_mach_arm_4T: expected = "armv4t"; break; |
| case bfd_mach_arm_5: expected = "armv5"; break; |
| case bfd_mach_arm_5T: expected = "armv5t"; break; |
| case bfd_mach_arm_5TE: expected = "armv5te"; break; |
| case bfd_mach_arm_XScale: expected = "XScale"; break; |
| case bfd_mach_arm_iWMMXt: expected = "iWMMXt"; break; |
| case bfd_mach_arm_iWMMXt2: expected = "iWMMXt2"; break; |
| } |
| |
| if (strcmp (arch_string, expected) != 0) |
| { |
| strcpy ((char *) buffer + (offsetof (arm_Note, name) |
| + ((strlen (NOTE_ARCH_STRING) + 3) & ~3)), |
| expected); |
| |
| if (! bfd_set_section_contents (abfd, arm_arch_section, buffer, |
| (file_ptr) 0, buffer_size)) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("warning: unable to update contents of %s section in %pB"), |
| note_section, abfd); |
| goto FAIL; |
| } |
| } |
| |
| free (buffer); |
| return true; |
| |
| FAIL: |
| free (buffer); |
| return false; |
| } |
| |
| |
| static struct |
| { |
| const char * string; |
| unsigned int mach; |
| } |
| |
| /* Newer architectures versions should not be added here as build attribute are |
| a better mechanism to convey ISA used. */ |
| architectures[] = |
| { |
| { "armv2", bfd_mach_arm_2 }, |
| { "armv2a", bfd_mach_arm_2a }, |
| { "armv3", bfd_mach_arm_3 }, |
| { "armv3M", bfd_mach_arm_3M }, |
| { "armv4", bfd_mach_arm_4 }, |
| { "armv4t", bfd_mach_arm_4T }, |
| { "armv5", bfd_mach_arm_5 }, |
| { "armv5t", bfd_mach_arm_5T }, |
| { "armv5te", bfd_mach_arm_5TE }, |
| { "XScale", bfd_mach_arm_XScale }, |
| /* Maverick extensions have been dropped, so treat this as Armv4T. */ |
| { "ep9312", bfd_mach_arm_4T }, |
| { "iWMMXt", bfd_mach_arm_iWMMXt }, |
| { "iWMMXt2", bfd_mach_arm_iWMMXt2 }, |
| { "arm_any", bfd_mach_arm_unknown } |
| }; |
| |
| /* Extract the machine number stored in a note section. */ |
| unsigned int |
| bfd_arm_get_mach_from_notes (bfd *abfd, const char *note_section) |
| { |
| asection * arm_arch_section; |
| bfd_size_type buffer_size; |
| bfd_byte * buffer; |
| char * arch_string; |
| int i; |
| |
| /* Look for a note section. If one is present check the architecture |
| string encoded in it, and set it to the current architecture if it is |
| different. */ |
| arm_arch_section = bfd_get_section_by_name (abfd, note_section); |
| |
| if (arm_arch_section == NULL |
| || (arm_arch_section->flags & SEC_HAS_CONTENTS) == 0) |
| return bfd_mach_arm_unknown; |
| |
| buffer_size = arm_arch_section->size; |
| if (buffer_size == 0) |
| return bfd_mach_arm_unknown; |
| |
| if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer)) |
| goto FAIL; |
| |
| /* Parse the note. */ |
| if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string)) |
| goto FAIL; |
| |
| /* Interpret the architecture string. */ |
| for (i = ARRAY_SIZE (architectures); i--;) |
| if (strcmp (arch_string, architectures[i].string) == 0) |
| { |
| free (buffer); |
| return architectures[i].mach; |
| } |
| |
| FAIL: |
| free (buffer); |
| return bfd_mach_arm_unknown; |
| } |
| |
| bool |
| bfd_is_arm_special_symbol_name (const char * name, int type) |
| { |
| /* The ARM compiler outputs several obsolete forms. Recognize them |
| in addition to the standard $a, $t and $d. We are somewhat loose |
| in what we accept here, since the full set is not documented. */ |
| if (!name || name[0] != '$') |
| return false; |
| if (name[1] == 'a' || name[1] == 't' || name[1] == 'd') |
| type &= BFD_ARM_SPECIAL_SYM_TYPE_MAP; |
| else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p') |
| type &= BFD_ARM_SPECIAL_SYM_TYPE_TAG; |
| else if (name[1] >= 'a' && name[1] <= 'z') |
| type &= BFD_ARM_SPECIAL_SYM_TYPE_OTHER; |
| else |
| return false; |
| |
| return (type != 0 && (name[2] == 0 || name[2] == '.')); |
| } |
| |
