diff options
Diffstat (limited to 'lto-plugin/lto-plugin.c')
| -rw-r--r-- | lto-plugin/lto-plugin.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lto-plugin/lto-plugin.c b/lto-plugin/lto-plugin.c index 7927dca60a4..e9afd2fb76d 100644 --- a/lto-plugin/lto-plugin.c +++ b/lto-plugin/lto-plugin.c @@ -180,6 +180,10 @@ static ld_plugin_add_input_file add_input_file; static ld_plugin_add_input_library add_input_library; static ld_plugin_message message; static ld_plugin_add_symbols add_symbols, add_symbols_v2; +static ld_plugin_get_api_version get_api_version; + +/* By default, use version LAPI_V0 if there is not negotiation. */ +static enum linker_api_version api_version = LAPI_V0; static struct plugin_file_info *claimed_files = NULL; static unsigned int num_claimed_files = 0; @@ -1428,6 +1432,43 @@ process_option (const char *option) verbose = verbose || debug; } +/* Negotiate linker API version. */ + +static void +negotiate_api_version (void) +{ + const char *linker_identifier; + const char *linker_version; + + enum linker_api_version supported_api = LAPI_V0; +#if HAVE_PTHREAD_LOCKING + supported_api = LAPI_V1; +#endif + + api_version = get_api_version ("GCC", BASE_VERSION, LAPI_V0, + supported_api, &linker_identifier, &linker_version); + if (api_version > supported_api) + { + fprintf (stderr, "requested an unsupported API version (%d)\n", api_version); + abort (); + } + + switch (api_version) + { + case LAPI_V0: + break; + case LAPI_V1: + check (get_symbols_v3, LDPL_FATAL, + "get_symbols_v3 required for API version 1"); + check (add_symbols_v2, LDPL_FATAL, + "add_symbols_v2 required for API version 1"); + break; + default: + fprintf (stderr, "unsupported API version (%d)\n", api_version); + abort (); + } +} + /* Called by a linker after loading the plugin. TV is the transfer vector. */ enum ld_plugin_status @@ -1496,12 +1537,18 @@ onload (struct ld_plugin_tv *tv) /* We only use this to make user-friendly temp file names. */ link_output_name = p->tv_u.tv_string; break; + case LDPT_GET_API_VERSION: + get_api_version = p->tv_u.tv_get_api_version; + break; default: break; } p++; } + if (get_api_version) + negotiate_api_version (); + check (register_claim_file, LDPL_FATAL, "register_claim_file not found"); check (add_symbols, LDPL_FATAL, "add_symbols not found"); status = register_claim_file (claim_file_handler); |