mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
2.4 KiB
107 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
|
|
#include "gcc-common.h" |
|
|
|
__visible int plugin_is_GPL_compatible; |
|
|
|
static unsigned int canary_offset; |
|
|
|
static unsigned int arm_pertask_ssp_rtl_execute(void) |
|
{ |
|
rtx_insn *insn; |
|
|
|
for (insn = get_insns(); insn; insn = NEXT_INSN(insn)) { |
|
const char *sym; |
|
rtx body; |
|
rtx current; |
|
|
|
/* |
|
* Find a SET insn involving a SYMBOL_REF to __stack_chk_guard |
|
*/ |
|
if (!INSN_P(insn)) |
|
continue; |
|
body = PATTERN(insn); |
|
if (GET_CODE(body) != SET || |
|
GET_CODE(SET_SRC(body)) != SYMBOL_REF) |
|
continue; |
|
sym = XSTR(SET_SRC(body), 0); |
|
if (strcmp(sym, "__stack_chk_guard")) |
|
continue; |
|
|
|
/* |
|
* Replace the source of the SET insn with an expression that |
|
* produces the address of the current task's stack canary value |
|
*/ |
|
current = gen_reg_rtx(Pmode); |
|
|
|
emit_insn_before(gen_load_tp_hard(current), insn); |
|
|
|
SET_SRC(body) = gen_rtx_PLUS(Pmode, current, |
|
GEN_INT(canary_offset)); |
|
} |
|
return 0; |
|
} |
|
|
|
#define PASS_NAME arm_pertask_ssp_rtl |
|
|
|
#define NO_GATE |
|
#include "gcc-generate-rtl-pass.h" |
|
|
|
#if BUILDING_GCC_VERSION >= 9000 |
|
static bool no(void) |
|
{ |
|
return false; |
|
} |
|
|
|
static void arm_pertask_ssp_start_unit(void *gcc_data, void *user_data) |
|
{ |
|
targetm.have_stack_protect_combined_set = no; |
|
targetm.have_stack_protect_combined_test = no; |
|
} |
|
#endif |
|
|
|
__visible int plugin_init(struct plugin_name_args *plugin_info, |
|
struct plugin_gcc_version *version) |
|
{ |
|
const char * const plugin_name = plugin_info->base_name; |
|
const int argc = plugin_info->argc; |
|
const struct plugin_argument *argv = plugin_info->argv; |
|
int i; |
|
|
|
if (!plugin_default_version_check(version, &gcc_version)) { |
|
error(G_("incompatible gcc/plugin versions")); |
|
return 1; |
|
} |
|
|
|
for (i = 0; i < argc; ++i) { |
|
if (!strcmp(argv[i].key, "disable")) |
|
return 0; |
|
|
|
/* all remaining options require a value */ |
|
if (!argv[i].value) { |
|
error(G_("no value supplied for option '-fplugin-arg-%s-%s'"), |
|
plugin_name, argv[i].key); |
|
return 1; |
|
} |
|
|
|
if (!strcmp(argv[i].key, "offset")) { |
|
canary_offset = atoi(argv[i].value); |
|
continue; |
|
} |
|
error(G_("unknown option '-fplugin-arg-%s-%s'"), |
|
plugin_name, argv[i].key); |
|
return 1; |
|
} |
|
|
|
PASS_INFO(arm_pertask_ssp_rtl, "expand", 1, PASS_POS_INSERT_AFTER); |
|
|
|
register_callback(plugin_info->base_name, PLUGIN_PASS_MANAGER_SETUP, |
|
NULL, &arm_pertask_ssp_rtl_pass_info); |
|
|
|
#if BUILDING_GCC_VERSION >= 9000 |
|
register_callback(plugin_info->base_name, PLUGIN_START_UNIT, |
|
arm_pertask_ssp_start_unit, NULL); |
|
#endif |
|
|
|
return 0; |
|
}
|
|
|