tjh.dev
+8
arch/x86/boot/string.c
+8
arch/x86/boot/string.c
···
37
37
return diff;
38
38
}
39
39
40
+
/*
41
+
* Clang may lower `memcmp == 0` to `bcmp == 0`.
42
+
*/
43
+
int bcmp(const void *s1, const void *s2, size_t len)
44
+
{
45
+
return memcmp(s1, s2, len);
46
+
}
47
+
40
48
int strcmp(const char *str1, const char *str2)
41
49
{
42
50
const unsigned char *s1 = (const unsigned char *)str1;
+1
arch/x86/kernel/cpu/mtrr/cyrix.c
+1
arch/x86/kernel/cpu/mtrr/cyrix.c
+1
arch/x86/kernel/ptrace.c
+1
arch/x86/kernel/ptrace.c
+1
arch/x86/lib/cpu.c
+1
arch/x86/lib/cpu.c
+30
-4
arch/x86/purgatory/Makefile
+30
-4
arch/x86/purgatory/Makefile
···
6
6
targets += $(purgatory-y)
7
7
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
8
8
9
+
$(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE
10
+
$(call if_changed_rule,cc_o_c)
11
+
9
12
$(obj)/sha256.o: $(srctree)/lib/sha256.c FORCE
10
13
$(call if_changed_rule,cc_o_c)
11
14
···
20
17
21
18
# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
22
19
# in turn leaves some undefined symbols like __fentry__ in purgatory and not
23
-
# sure how to relocate those. Like kexec-tools, use custom flags.
20
+
# sure how to relocate those.
21
+
ifdef CONFIG_FUNCTION_TRACER
22
+
CFLAGS_REMOVE_sha256.o += $(CC_FLAGS_FTRACE)
23
+
CFLAGS_REMOVE_purgatory.o += $(CC_FLAGS_FTRACE)
24
+
CFLAGS_REMOVE_string.o += $(CC_FLAGS_FTRACE)
25
+
CFLAGS_REMOVE_kexec-purgatory.o += $(CC_FLAGS_FTRACE)
26
+
endif
24
27
25
-
KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large
26
-
KBUILD_CFLAGS += -m$(BITS)
27
-
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
28
+
ifdef CONFIG_STACKPROTECTOR
29
+
CFLAGS_REMOVE_sha256.o += -fstack-protector
30
+
CFLAGS_REMOVE_purgatory.o += -fstack-protector
31
+
CFLAGS_REMOVE_string.o += -fstack-protector
32
+
CFLAGS_REMOVE_kexec-purgatory.o += -fstack-protector
33
+
endif
34
+
35
+
ifdef CONFIG_STACKPROTECTOR_STRONG
36
+
CFLAGS_REMOVE_sha256.o += -fstack-protector-strong
37
+
CFLAGS_REMOVE_purgatory.o += -fstack-protector-strong
38
+
CFLAGS_REMOVE_string.o += -fstack-protector-strong
39
+
CFLAGS_REMOVE_kexec-purgatory.o += -fstack-protector-strong
40
+
endif
41
+
42
+
ifdef CONFIG_RETPOLINE
43
+
CFLAGS_REMOVE_sha256.o += $(RETPOLINE_CFLAGS)
44
+
CFLAGS_REMOVE_purgatory.o += $(RETPOLINE_CFLAGS)
45
+
CFLAGS_REMOVE_string.o += $(RETPOLINE_CFLAGS)
46
+
CFLAGS_REMOVE_kexec-purgatory.o += $(RETPOLINE_CFLAGS)
47
+
endif
28
48
29
49
$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
30
50
$(call if_changed,ld)
+6
arch/x86/purgatory/purgatory.c
+6
arch/x86/purgatory/purgatory.c
-23
arch/x86/purgatory/string.c
-23
arch/x86/purgatory/string.c
···
1
-
// SPDX-License-Identifier: GPL-2.0-only
2
-
/*
3
-
* Simple string functions.
4
-
*
5
-
* Copyright (C) 2014 Red Hat Inc.
6
-
*
7
-
* Author:
8
-
* Vivek Goyal <vgoyal@redhat.com>
9
-
*/
10
-
11
-
#include <linux/types.h>
12
-
13
-
#include "../boot/string.c"
14
-
15
-
void *memcpy(void *dst, const void *src, size_t len)
16
-
{
17
-
return __builtin_memcpy(dst, src, len);
18
-
}
19
-
20
-
void *memset(void *dst, int c, size_t len)
21
-
{
22
-
return __builtin_memset(dst, c, len);
23
-
}