FreeChainXenon/binutils-gdb
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add plugin API for processing plugin-added input files

Browse source 
Gold plugins may wish to further process an input file added by a plugin. For
example, the plugin may need to assign a unique segment for sections in a
plugin-generated input file. This patch adds a plugin callback that the linker
will call when reading symbols from a new input file added after the
all_symbols_read event (i.e. an input file added by a plugin).

2017-12-11  Stephen Crane  <sjc@immunant.com>

	* plugin-api.h: Add new plugin hook to allow processing of input
	files added by a plugin.
	(ld_plugin_new_input_handler): New function hook type.
	(ld_plugin_register_new_input): New interface.
	(LDPT_REGISTER_NEW_INPUT_HOOK): New enum val.
	(tv_register_new_input): New member.

	* plugin.cc (Plugin::load): Include hooks for register_new_input
	in transfer vector.
	(Plugin::new_input): New function.
	(register_new_input): New function.
	(Plugin_manager::claim_file): Call Plugin::new_input if in
	replacement phase.
	* plugin.h (Plugin::set_new_input_handler): New function.
	* testsuite/plugin_new_section_layout.c: New plugin to test
	new_input plugin API.
	* testsuite/plugin_final_layout.sh: Add new input test.
	* testsuite/Makefile.am (plugin_layout_new_file): New test case.
	* testsuite/Makefile.in: Regenerate.
This commit is contained in:
Stephen Crane 2017-12-11 14:58:38 -08:00 • committed by Sriraman Tallam
parent 4c5ae11b42
commit c4e648430f
9 changed files with 333 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

18
include/plugin-api.h
View file

@ -365,6 +365,20 @@ enum ld_plugin_status
(*ld_plugin_get_input_section_size) (const struct ld_plugin_section section,
uint64_t *secsize);
typedef
enum ld_plugin_status
(*ld_plugin_new_input_handler) (const struct ld_plugin_input_file *file);
/* The linker's interface for registering the "new_input" handler. This handler
will be notified when a new input file has been added after the
all_symbols_read event, allowing the plugin to, for example, set a unique
segment for sections in plugin-generated input files. */
typedef
enum ld_plugin_status
(*ld_plugin_register_new_input) (ld_plugin_new_input_handler handler);
enum ld_plugin_level
{
LDPL_INFO,
@ -407,7 +421,8 @@ enum ld_plugin_tag
LDPT_UNIQUE_SEGMENT_FOR_SECTIONS = 27,
LDPT_GET_SYMBOLS_V3 = 28,
LDPT_GET_INPUT_SECTION_ALIGNMENT = 29,
LDPT_GET_INPUT_SECTION_SIZE = 30
LDPT_GET_INPUT_SECTION_SIZE = 30,
LDPT_REGISTER_NEW_INPUT_HOOK = 31
};
/* The plugin transfer vector. */
@ -441,6 +456,7 @@ struct ld_plugin_tv
ld_plugin_unique_segment_for_sections tv_unique_segment_for_sections;
ld_plugin_get_input_section_alignment tv_get_input_section_alignment;
ld_plugin_get_input_section_size tv_get_input_section_size;
ld_plugin_register_new_input tv_register_new_input;
} tv_u;
};