mirror of https://github.com/dynup/kpatch
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
#include "gcc-common.h"
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#include <error.h>
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#define PLUGIN_NAME "ppc64le-plugin"
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int plugin_is_GPL_compatible;
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struct plugin_info plugin_info = {
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.version = "1",
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.help = PLUGIN_NAME ": insert nops after local calls\n",
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};
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static unsigned int ppc64le_plugin_execute(void)
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{
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rtx_insn *insn;
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int code;
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const char *name;
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static int nonlocal_code = -1, local_code = -1,
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value_nonlocal_code = -1, value_local_code = -1;
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static bool initialized = false;
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if (initialized)
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goto found;
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/* Find the rs6000.md code numbers for local and non-local calls */
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initialized = true;
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for (code = 0; code < 1000; code++) {
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name = get_insn_name(code);
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if (!name)
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continue;
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if (!strcmp(name , "*call_local_aixdi"))
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local_code = code;
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else if (!strcmp(name , "*call_nonlocal_aixdi"))
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nonlocal_code = code;
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else if (!strcmp(name, "*call_value_local_aixdi"))
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value_local_code = code;
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else if (!strcmp(name, "*call_value_nonlocal_aixdi"))
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value_nonlocal_code = code;
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if (nonlocal_code != -1 && local_code != -1 &&
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value_nonlocal_code != -1 && value_local_code != -1)
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goto found;
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}
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found:
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if (nonlocal_code == -1 || local_code == -1 ||
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value_nonlocal_code == -1 || value_local_code == -1) {
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fprintf(stderr, PLUGIN_NAME ": can't find call instruction codes");
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return 1;
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}
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/* Convert local calls to non-local */
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for (insn = get_insns(); insn; insn = NEXT_INSN(insn)) {
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if (GET_CODE(insn) == CALL_INSN) {
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if (INSN_CODE(insn) == local_code)
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INSN_CODE(insn) = nonlocal_code;
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else if (INSN_CODE(insn) == value_local_code)
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INSN_CODE(insn) = value_nonlocal_code;
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}
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}
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return 0;
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}
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#define PASS_NAME ppc64le_plugin
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#define NO_GATE
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#include "gcc-generate-rtl-pass.h"
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int plugin_init(struct plugin_name_args *plugin_info,
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struct plugin_gcc_version *version)
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{
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const char * const plugin_name = plugin_info->base_name;
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PASS_INFO(ppc64le_plugin, "vregs", 1, PASS_POS_INSERT_AFTER);
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if (!plugin_default_version_check(version, &gcc_version))
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error(1, 0, PLUGIN_NAME ": incompatible gcc/plugin versions");
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register_callback(plugin_name, PLUGIN_INFO, NULL, &plugin_info);
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register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
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&ppc64le_plugin_pass_info);
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return 0;
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}
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