@@ -26,6 +26,7 @@ endif
nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
arch_file := arch-$(nolibc_arch).h
all_files := \
+ compiler.h \
ctype.h \
errno.h \
nolibc.h \
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_AARCH64_H
#define _NOLIBC_ARCH_AARCH64_H
+#include "compiler.h"
+
/* The struct returned by the newfstatat() syscall. Differs slightly from the
* x86_64's stat one by field ordering, so be careful.
*/
@@ -172,13 +174,11 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
"ldr x0, [sp]\n" /* argc (x0) was in the stack */
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_ARM_H
#define _NOLIBC_ARCH_ARM_H
+#include "compiler.h"
+
/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
* exactly 56 bytes (stops before the unused array). In big endian, the format
* differs as devices are returned as short only.
@@ -199,13 +201,11 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
"pop {%r0}\n" /* argc was in the stack */
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_I386_H
#define _NOLIBC_ARCH_I386_H
+#include "compiler.h"
+
/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
* exactly 56 bytes (stops before the unused array).
*/
@@ -181,8 +183,6 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code */
/*
* i386 System V ABI mandates:
@@ -193,7 +193,7 @@ const unsigned long *_auxv __attribute__((weak));
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
"pop %eax\n" /* argc (first arg, %eax) */
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_LOONGARCH_H
#define _NOLIBC_ARCH_LOONGARCH_H
+#include "compiler.h"
+
/* Syscalls for LoongArch :
* - stack is 16-byte aligned
* - syscall number is passed in a7
@@ -149,8 +151,6 @@
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
#if __loongarch_grlen == 32
#define LONGLOG "2"
#define SZREG "4"
@@ -175,7 +175,7 @@ const unsigned long *_auxv __attribute__((weak));
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
REG_L " $a0, $sp, 0\n" /* argc (a0) was in the stack */
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_MIPS_H
#define _NOLIBC_ARCH_MIPS_H
+#include "compiler.h"
+
/* The struct returned by the stat() syscall. 88 bytes are returned by the
* syscall.
*/
@@ -179,8 +181,6 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code, note that it's called __start on MIPS */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) __start(void)
{
@@ -189,7 +189,7 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protec
".set push\n"
".set noreorder\n"
".option pic0\n"
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"jal __stack_chk_init\n" /* initialize stack protector */
"nop\n" /* delayed slot */
#endif
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_RISCV_H
#define _NOLIBC_ARCH_RISCV_H
+#include "compiler.h"
+
struct sys_stat_struct {
unsigned long st_dev; /* Device. */
unsigned long st_ino; /* File serial number. */
@@ -177,8 +179,6 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
@@ -187,7 +187,7 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protec
".option norelax\n"
"lla gp, __global_pointer$\n"
".option pop\n"
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
REG_L" a0, 0(sp)\n" /* argc (a0) was in the stack */
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_ARCH_X86_64_H
#define _NOLIBC_ARCH_X86_64_H
+#include "compiler.h"
+
/* The struct returned by the stat() syscall, equivalent to stat64(). The
* syscall returns 116 bytes and stops in the middle of __unused.
*/
@@ -181,8 +183,6 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
-#define __ARCH_SUPPORTS_STACK_PROTECTOR
-
/* startup code */
/*
* x86-64 System V ABI mandates:
@@ -193,7 +193,7 @@ const unsigned long *_auxv __attribute__((weak));
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
-#ifdef NOLIBC_STACKPROTECTOR
+#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
"pop %rdi\n" /* argc (first arg, %rdi) */
new file mode 100644
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * NOLIBC compiler support header
+ * Copyright (C) 2023 Thomas Weißschuh <linux@weissschuh.net>
+ */
+#ifndef _NOLIBC_COMPILER_H
+#define _NOLIBC_COMPILER_H
+
+#if defined(__SSP__) || defined(__SSP_STRONG__) || defined(__SSP_ALL__) || defined(__SSP_EXPLICIT__)
+
+#define _NOLIBC_STACKPROTECTOR
+
+#endif /* defined(__SSP__) ... */
+
+#endif /* _NOLIBC_COMPILER_H */
@@ -7,13 +7,9 @@
#ifndef _NOLIBC_STACKPROTECTOR_H
#define _NOLIBC_STACKPROTECTOR_H
-#include "arch.h"
+#include "compiler.h"
-#if defined(NOLIBC_STACKPROTECTOR)
-
-#if !defined(__ARCH_SUPPORTS_STACK_PROTECTOR)
-#error "nolibc does not support stack protectors on this arch"
-#endif
+#if defined(_NOLIBC_STACKPROTECTOR)
#include "sys.h"
#include "stdlib.h"
@@ -49,6 +45,6 @@ void __stack_chk_init(void)
if (__stack_chk_guard != (uintptr_t) &__stack_chk_guard)
__stack_chk_guard ^= (uintptr_t) &__stack_chk_guard;
}
-#endif /* defined(NOLIBC_STACKPROTECTOR) */
+#endif /* defined(_NOLIBC_STACKPROTECTOR) */
#endif /* _NOLIBC_STACKPROTECTOR_H */
@@ -802,13 +802,13 @@ static int run_protection(int min, int max)
llen += printf("0 -fstackprotector ");
-#if !defined(NOLIBC_STACKPROTECTOR)
+#if !defined(_NOLIBC_STACKPROTECTOR)
llen += printf("not supported");
pad_spc(llen, 64, "[SKIPPED]\n");
return 0;
#endif
-#if defined(NOLIBC_STACKPROTECTOR)
+#if defined(_NOLIBC_STACKPROTECTOR)
if (!__stack_chk_guard) {
llen += printf("__stack_chk_guard not initialized");
pad_spc(llen, 64, "[FAIL]\n");