[PATCH] LTO plugin: add ld_plugin_version callback.
Martin Liška
mliska@suse.cz
Mon May 2 07:51:52 GMT 2022
Hi.
This in a new plug-in function that helps identifying compiler
by a linker. Will be used in mold linker.
Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
Ready to be installed?
Thanks,
Martin
include/ChangeLog:
* plugin-api.h (enum ld_plugin_compiler): New enum.
(enum ld_plugin_version): New typedef.
(struct ld_plugin_tv): Add new field.
lto-plugin/ChangeLog:
* lto-plugin.c (onload): Call ld_plugin_version.
---
include/plugin-api.h | 18 +++++++++++++++++-
lto-plugin/lto-plugin.c | 4 ++++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/include/plugin-api.h b/include/plugin-api.h
index 4e12c0320d6..4d0989028cc 100644
--- a/include/plugin-api.h
+++ b/include/plugin-api.h
@@ -211,6 +211,13 @@ enum ld_plugin_symbol_section_kind
LDSSK_BSS
};
+enum ld_plugin_compiler
+{
+ LDPC_UNKNOWN,
+ LDPC_GCC,
+ LDPC_LLVM
+};
+
/* How a symbol is resolved. */
enum ld_plugin_symbol_resolution
@@ -475,6 +482,13 @@ enum ld_plugin_status
(*ld_plugin_get_wrap_symbols) (uint64_t *num_symbols,
const char ***wrap_symbol_list);
+/* The linker's interface for registering the "plugin_version" handler.
+ This handler is called directly after onload and provides compiler
+ and its number version (MAJOR * 1000 + MINOR). */
+
+typedef
+void (*ld_plugin_version) (enum ld_plugin_compiler compiler, int version);
+
enum ld_plugin_level
{
LDPL_INFO,
@@ -520,7 +534,8 @@ enum ld_plugin_tag
LDPT_GET_INPUT_SECTION_SIZE = 30,
LDPT_REGISTER_NEW_INPUT_HOOK = 31,
LDPT_GET_WRAP_SYMBOLS = 32,
- LDPT_ADD_SYMBOLS_V2 = 33
+ LDPT_ADD_SYMBOLS_V2 = 33,
+ LDPT_PLUGIN_VERSION = 34,
};
/* The plugin transfer vector. */
@@ -556,6 +571,7 @@ struct ld_plugin_tv
ld_plugin_get_input_section_size tv_get_input_section_size;
ld_plugin_register_new_input tv_register_new_input;
ld_plugin_get_wrap_symbols tv_get_wrap_symbols;
+ ld_plugin_version tv_plugin_version;
} tv_u;
};
diff --git a/lto-plugin/lto-plugin.c b/lto-plugin/lto-plugin.c
index 7a1c77812f6..698a0617ca7 100644
--- a/lto-plugin/lto-plugin.c
+++ b/lto-plugin/lto-plugin.c
@@ -69,6 +69,7 @@ along with this program; see the file COPYING3. If not see
#include "../gcc/lto/common.h"
#include "simple-object.h"
#include "plugin-api.h"
+#include "ansidecl.h"
/* We need to use I64 instead of ll width-specifier on native Windows.
The reason for this is that older MS-runtimes don't support the ll. */
@@ -1466,6 +1467,9 @@ 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_PLUGIN_VERSION:
+ p->tv_u.tv_plugin_version (LDPC_GCC, GCC_VERSION);
+ break;
default:
break;
}
--
2.36.0
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