diff options
Diffstat (limited to 'ld/emultempl/armelf.em')
| -rw-r--r-- | ld/emultempl/armelf.em | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em index ee6aa76..6e3cfa6 100644 --- a/ld/emultempl/armelf.em +++ b/ld/emultempl/armelf.em @@ -65,13 +65,18 @@ static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **)); static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *)); +static void gld_${EMULATION_NAME}_finish PARAMS ((void)); static int no_pipeline_knowledge = 0; +static char * thumb_entry_symbol = NULL; + +#define OPTION_THUMB_ENTRY 301 static struct option longopts[] = { { "no-pipeline-knowledge", no_argument, NULL, 'p'}, + { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, { NULL, no_argument, NULL, 0 } }; @@ -80,6 +85,7 @@ gld${EMULATION_NAME}_list_options (file) FILE * file; { fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); + fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); } static int @@ -114,6 +120,10 @@ gld${EMULATION_NAME}_parse_args (argc, argv) case 'p': no_pipeline_knowledge = 1; break; + + case OPTION_THUMB_ENTRY: + thumb_entry_symbol = optarg; + break; } return 1; @@ -1136,6 +1146,49 @@ gld${EMULATION_NAME}_before_allocation () bfd_elf32_arm_allocate_interworking_sections (& link_info); } +static void +gld${EMULATION_NAME}_finish PARAMS((void)) +{ + struct bfd_link_hash_entry * h; + + if (thumb_entry_symbol == NULL) + return; + + h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true); + + if (h != (struct bfd_link_hash_entry *) NULL + && (h->type == bfd_link_hash_defined + || h->type == bfd_link_hash_defweak) + && h->u.def.section->output_section != NULL) + { + static char buffer[32]; + bfd_vma val; + + /* Special procesing is required for a Thumb entry symbol. The + bottom bit of its address must be set. */ + val = (h->u.def.value + + bfd_get_section_vma (output_bfd, + h->u.def.section->output_section) + + h->u.def.section->output_offset); + + val |= 1; + + /* Now convert this value into a string and store it in entry_symbol + where the lang_finish() function will pick it up. */ + buffer[0] = '0'; + buffer[1] = 'x'; + + sprintf_vma (buffer + 2, val); + + if (entry_symbol != NULL && entry_from_cmdline) + einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), + thumb_entry_symbol, entry_symbol); + entry_symbol = buffer; + } + else + einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol); +} + static char * gld${EMULATION_NAME}_get_script (isfile) int *isfile; @@ -1204,7 +1257,7 @@ struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = gld${EMULATION_NAME}_get_script, "${EMULATION_NAME}", "${OUTPUT_FORMAT}", - NULL, /* finish */ + gld${EMULATION_NAME}_finish, /* finish */ NULL, /* create output section statements */ gld${EMULATION_NAME}_open_dynamic_archive, gld${EMULATION_NAME}_place_orphan, |