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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_STRING_32_H
#define _ASM_X86_STRING_32_H

#ifdef __KERNEL__

/* Let gcc decide whether to inline or use the out of line functions */

#define __HAVE_ARCH_STRCPY
extern char *strcpy(char *dest, const char *src);

#define __HAVE_ARCH_STRNCPY
extern char *strncpy(char *dest, const char *src, size_t count);

#define __HAVE_ARCH_STRCAT
extern char *strcat(char *dest, const char *src);

#define __HAVE_ARCH_STRNCAT
extern char *strncat(char *dest, const char *src, size_t count);

#define __HAVE_ARCH_STRCMP
extern int strcmp(const char *cs, const char *ct);

#define __HAVE_ARCH_STRNCMP
extern int strncmp(const char *cs, const char *ct, size_t count);

#define __HAVE_ARCH_STRCHR
extern char *strchr(const char *s, int c);

#define __HAVE_ARCH_STRLEN
extern size_t strlen(const char *s);

static __always_inline void *__memcpy(void *to, const void *from, size_t n)
{
	int d0, d1, d2;
	asm volatile("rep ; movsl\n\t"
		     "movl %4,%%ecx\n\t"
		     "andl $3,%%ecx\n\t"
		     "jz 1f\n\t"
		     "rep ; movsb\n\t"
		     "1:"
		     : "=&c" (d0), "=&D" (d1), "=&S" (d2)
		     : "0" (n / 4), "g" (n), "1" ((long)to), "2" ((long)from)
		     : "memory");
	return to;
}

/*
 * This looks ugly, but the compiler can optimize it totally,
 * as the count is constant.
 */
static __always_inline void *__constant_memcpy(void *to, const void *from,
					       size_t n)
{
	long esi, edi;
	if (!n)
		return to;

	switch (n) {
	case 1:
		*(char *)to = *(char *)from;
		return to;
	case 2:
		*(short *)to = *(short *)from;
		return to;
	case 4:
		*(int *)to = *(int *)from;
		return to;
	case 3:
		*(short *)to = *(short *)from;
		*((char *)to + 2) = *((char *)from + 2);
		return to;
	case 5:
		*(int *)to = *(int *)from;
		*((char *)to + 4) = *((char *)from + 4);
		return to;
	case 6:
		*(int *)to = *(int *)from;
		*((short *)to + 2) = *((short *)from + 2);
		return to;
	case 8:
		*(int *)to = *(int *)from;
		*((int *)to + 1) = *((int *)from + 1);
		return to;
	}

	esi = (long)from;
	edi = (long)to;
	if (n >= 5 * 4) {
		/* large block: use rep prefix */
		int ecx;
		asm volatile("rep ; movsl"
			     : "=&c" (ecx), "=&D" (edi), "=&S" (esi)
			     : "0" (n / 4), "1" (edi), "2" (esi)
			     : "memory"
		);
	} else {
		/* small block: don't clobber ecx + smaller code */
		if (n >= 4 * 4)
			asm volatile("movsl"
				     : "=&D"(edi), "=&S"(esi)
				     : "0"(edi), "1"(esi)
				     : "memory");
		if (n >= 3 * 4)
			asm volatile("movsl"
				     : "=&D"(edi), "=&S"(esi)
				     : "0"(edi), "1"(esi)
				     : "memory");
		if (n >= 2 * 4)
			asm volatile("movsl"
				     : "=&D"(edi), "=&S"(esi)
				     : "0"(edi), "1"(esi)
				     : "memory");
		if (n >= 1 * 4)
			asm volatile("movsl"
				     : "=&D"(edi), "=&S"(esi)
				     : "0"(edi), "1"(esi)
				     : "memory");
	}
	switch (n % 4) {
		/* tail */
	case 0:
		return to;
	case 1:
		asm volatile("movsb"
			     : "=&D"(edi), "=&S"(esi)
			     : "0"(edi), "1"(esi)
			     : "memory");
		return to;
	case 2:
		asm volatile("movsw"
			     : "=&D"(edi), "=&S"(esi)
			     : "0"(edi), "1"(esi)
			     : "memory");
		return to;
	default:
		asm volatile("movsw\n\tmovsb"
			     : "=&D"(edi), "=&S"(esi)
			     : "0"(edi), "1"(esi)
			     : "memory");
		return to;
	}
}

#define __HAVE_ARCH_MEMCPY
extern void *memcpy(void *, const void *, size_t);

#ifndef CONFIG_FORTIFY_SOURCE
#ifdef CONFIG_X86_USE_3DNOW

#include <asm/mmx.h>

/*
 *	This CPU favours 3DNow strongly (eg AMD Athlon)
 */

static inline void *__constant_memcpy3d(void *to, const void *from, size_t len)
{
	if (len < 512)
		return __constant_memcpy(to, from, len);
	return _mmx_memcpy(to, from, len);
}

static inline void *__memcpy3d(void *to, const void *from, size_t len)
{
	if (len < 512)
		return __memcpy(to, from, len);
	return _mmx_memcpy(to, from, len);
}

#define memcpy(t, f, n)				\
	(__builtin_constant_p((n))		\
	 ? __constant_memcpy3d((t), (f), (n))	\
	 : __memcpy3d((t), (f), (n)))

#else

/*
 *	No 3D Now!
 */

#define memcpy(t, f, n) __builtin_memcpy(t, f, n)

#endif
#endif /* !CONFIG_FORTIFY_SOURCE */

#define __HAVE_ARCH_MEMMOVE
void *memmove(void *dest, const void *src, size_t n);

extern int memcmp(const void *, const void *, size_t);
#ifndef CONFIG_FORTIFY_SOURCE
#define memcmp __builtin_memcmp
#endif

#define __HAVE_ARCH_MEMCHR
extern void *memchr(const void *cs, int c, size_t count);

static inline void *__memset_generic(void *s, char c, size_t count)
{
	int d0, d1;
	asm volatile("rep\n\t"
		     "stosb"
		     : "=&c" (d0), "=&D" (d1)
		     : "a" (c), "1" (s), "0" (count)
		     : "memory");
	return s;
}

/* we might want to write optimized versions of these later */
#define __constant_count_memset(s, c, count) __memset_generic((s), (c), (count))

/*
 * memset(x, 0, y) is a reasonably common thing to do, so we want to fill
 * things 32 bits at a time even when we don't know the size of the
 * area at compile-time..
 */
static __always_inline
void *__constant_c_memset(void *s, unsigned long c, size_t count)
{
	int d0, d1;
	asm volatile("rep ; stosl\n\t"
		     "testb $2,%b3\n\t"
		     "je 1f\n\t"
		     "stosw\n"
		     "1:\ttestb $1,%b3\n\t"
		     "je 2f\n\t"
		     "stosb\n"
		     "2:"
		     : "=&c" (d0), "=&D" (d1)
		     : "a" (c), "q" (count), "0" (count/4), "1" ((long)s)
		     : "memory");
	return s;
}

/* Added by Gertjan van Wingerde to make minix and sysv module work */
#define __HAVE_ARCH_STRNLEN
extern size_t strnlen(const char *s, size_t count);
/* end of additional stuff */

#define __HAVE_ARCH_STRSTR
extern char *strstr(const char *cs, const char *ct);

/*
 * This looks horribly ugly, but the compiler can optimize it totally,
 * as we by now know that both pattern and count is constant..
 */
static __always_inline
void *__constant_c_and_count_memset(void *s, unsigned long pattern,
				    size_t count)
{
	switch (count) {
	case 0:
		return s;
	case 1:
		*(unsigned char *)s = pattern & 0xff;
		return s;
	case 2:
		*(unsigned short *)s = pattern & 0xffff;
		return s;
	case 3:
		*(unsigned short *)s = pattern & 0xffff;
		*((unsigned char *)s + 2) = pattern & 0xff;
		return s;
	case 4:
		*(unsigned long *)s = pattern;
		return s;
	}

#define COMMON(x)							\
	asm volatile("rep ; stosl"					\
		     x							\
		     : "=&c" (d0), "=&D" (d1)				\
		     : "a" (eax), "0" (count/4), "1" ((long)s)	\
		     : "memory")

	{
		int d0, d1;
		unsigned long eax = pattern;

		switch (count % 4) {
		case 0:
			COMMON("");
			return s;
		case 1:
			COMMON("\n\tstosb");
			return s;
		case 2:
			COMMON("\n\tstosw");
			return s;
		default:
			COMMON("\n\tstosw\n\tstosb");
			return s;
		}
	}

#undef COMMON
}

#define __constant_c_x_memset(s, c, count)			\
	(__builtin_constant_p(count)				\
	 ? __constant_c_and_count_memset((s), (c), (count))	\
	 : __constant_c_memset((s), (c), (count)))

#define __memset(s, c, count)				\
	(__builtin_constant_p(count)			\
	 ? __constant_count_memset((s), (c), (count))	\
	 : __memset_generic((s), (c), (count)))

#define __HAVE_ARCH_MEMSET
extern void *memset(void *, int, size_t);
#ifndef CONFIG_FORTIFY_SOURCE
#define memset(s, c, count) __builtin_memset(s, c, count)
#endif /* !CONFIG_FORTIFY_SOURCE */

#define __HAVE_ARCH_MEMSET16
static inline void *memset16(uint16_t *s, uint16_t v, size_t n)
{
	int d0, d1;
	asm volatile("rep\n\t"
		     "stosw"
		     : "=&c" (d0), "=&D" (d1)
		     : "a" (v), "1" (s), "0" (n)
		     : "memory");
	return s;
}

#define __HAVE_ARCH_MEMSET32
static inline void *memset32(uint32_t *s, uint32_t v, size_t n)
{
	int d0, d1;
	asm volatile("rep\n\t"
		     "stosl"
		     : "=&c" (d0), "=&D" (d1)
		     : "a" (v), "1" (s), "0" (n)
		     : "memory");
	return s;
}

/*
 * find the first occurrence of byte 'c', or 1 past the area if none
 */
#define __HAVE_ARCH_MEMSCAN
extern void *memscan(void *addr, int c, size_t size);

#endif /* __KERNEL__ */

#endif /* _ASM_X86_STRING_32_H */

Filemanager

Name Type Size Permission Actions
crypto Folder 0755
e820 Folder 0755
fpu Folder 0755
numachip Folder 0755
trace Folder 0755
uv Folder 0755
xen Folder 0755
Kbuild File 294 B 0644
a.out-core.h File 1.89 KB 0644
acenv.h File 1.56 KB 0644
acpi.h File 4.76 KB 0644
agp.h File 1.04 KB 0644
alternative-asm.h File 2.43 KB 0644
alternative.h File 8.28 KB 0644
amd_nb.h File 2.98 KB 0644
apb_timer.h File 1.43 KB 0644
apic.h File 14.53 KB 0644
apic_flat_64.h File 151 B 0644
apicdef.h File 11.26 KB 0644
apm.h File 1.8 KB 0644
arch_hweight.h File 1.28 KB 0644
archrandom.h File 3.03 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 946 B 0644
asm.h File 4.97 KB 0644
atomic.h File 6.02 KB 0644
atomic64_32.h File 8.71 KB 0644
atomic64_64.h File 6.31 KB 0644
barrier.h File 3.6 KB 0644
bios_ebda.h File 914 B 0644
bitops.h File 13.78 KB 0644
boot.h File 1.53 KB 0644
bootparam_utils.h File 2.86 KB 0644
bug.h File 2.07 KB 0644
bugs.h File 493 B 0644
cache.h File 641 B 0644
cacheflush.h File 306 B 0644
cacheinfo.h File 209 B 0644
calgary.h File 2.31 KB 0644
ce4100.h File 121 B 0644
checksum.h File 133 B 0644
checksum_32.h File 4.86 KB 0644
checksum_64.h File 5.41 KB 0644
clocksource.h File 488 B 0644
cmdline.h File 302 B 0644
cmpxchg.h File 7.68 KB 0644
cmpxchg_32.h File 3.15 KB 0644
cmpxchg_64.h File 543 B 0644
compat.h File 7.37 KB 0644
cpu.h File 975 B 0644
cpu_device_id.h File 1.38 KB 0644
cpu_entry_area.h File 2.27 KB 0644
cpufeature.h File 7.75 KB 0644
cpufeatures.h File 24.62 KB 0644
cpumask.h File 408 B 0644
crash.h File 320 B 0644
current.h File 443 B 0644
debugreg.h File 2.67 KB 0644
delay.h File 208 B 0644
desc.h File 11.42 KB 0644
desc_defs.h File 3.16 KB 0644
device.h File 568 B 0644
disabled-features.h File 2.31 KB 0644
div64.h File 1.79 KB 0644
dma-mapping.h File 2.4 KB 0644
dma.h File 9.58 KB 0644
dmi.h File 556 B 0644
dwarf2.h File 2.43 KB 0644
edac.h File 474 B 0644
efi.h File 6.9 KB 0644
elf.h File 10.82 KB 0644
emergency-restart.h File 202 B 0644
entry_arch.h File 1.88 KB 0644
espfix.h File 426 B 0644
exec.h File 37 B 0644
export.h File 120 B 0644
extable.h File 1.27 KB 0644
fb.h File 540 B 0644
fixmap.h File 6.04 KB 0644
floppy.h File 6.59 KB 0644
frame.h File 815 B 0644
ftrace.h File 1.8 KB 0644
futex.h File 2.2 KB 0644
gart.h File 2.64 KB 0644
genapic.h File 22 B 0644
geode.h File 842 B 0644
hardirq.h File 2.3 KB 0644
highmem.h File 2.6 KB 0644
hpet.h File 3.38 KB 0644
hugetlb.h File 2.15 KB 0644
hw_breakpoint.h File 1.96 KB 0644
hw_irq.h File 3.85 KB 0644
hypervisor.h File 1.84 KB 0644
i8259.h File 1.93 KB 0644
ia32.h File 1.46 KB 0644
ia32_unistd.h File 313 B 0644
imr.h File 1.81 KB 0644
inat.h File 6.58 KB 0644
inat_types.h File 1013 B 0644
init.h File 632 B 0644
insn-eval.h File 837 B 0644
insn.h File 7.46 KB 0644
inst.h File 5.07 KB 0644
intel-family.h File 3.29 KB 0644
intel-mid.h File 4.91 KB 0644
intel_ds.h File 793 B 0644
intel_mid_vrtc.h File 326 B 0644
intel_pmc_ipc.h File 2.08 KB 0644
intel_pt.h File 292 B 0644
intel_punit_ipc.h File 4.56 KB 0644
intel_rdt_sched.h File 2.59 KB 0644
intel_scu_ipc.h File 2.3 KB 0644
intel_telemetry.h File 3.96 KB 0644
invpcid.h File 1.57 KB 0644
io.h File 12.21 KB 0644
io_apic.h File 5.63 KB 0644
iomap.h File 1.22 KB 0644
iommu.h File 392 B 0644
iommu_table.h File 3.82 KB 0644
iosf_mbi.h File 5.74 KB 0644
ipi.h File 2.84 KB 0644
irq.h File 1.12 KB 0644
irq_regs.h File 679 B 0644
irq_remapping.h File 2.96 KB 0644
irq_vectors.h File 4.12 KB 0644
irq_work.h File 397 B 0644
irqdomain.h File 1.61 KB 0644
irqflags.h File 4.38 KB 0644
ist.h File 735 B 0644
jump_label.h File 2.44 KB 0644
kasan.h File 966 B 0644
kaslr.h File 424 B 0644
kbdleds.h File 454 B 0644
kdebug.h File 752 B 0644
kexec-bzimage64.h File 189 B 0644
kexec.h File 6.69 KB 0644
kgdb.h File 2.09 KB 0644
kmap_types.h File 289 B 0644
kprobes.h File 3.82 KB 0644
kvm_emulate.h File 15.23 KB 0644
kvm_guest.h File 172 B 0644
kvm_host.h File 42.72 KB 0644
kvm_page_track.h File 2.48 KB 0644
kvm_para.h File 3 KB 0644
kvmclock.h File 170 B 0644
linkage.h File 581 B 0644
livepatch.h File 1.12 KB 0644
local.h File 3.83 KB 0644
local64.h File 33 B 0644
mach_timer.h File 1.55 KB 0644
mach_traps.h File 1013 B 0644
math_emu.h File 395 B 0644
mc146818rtc.h File 2.76 KB 0644
mce.h File 12.54 KB 0644
mem_encrypt.h File 2.83 KB 0644
microcode.h File 4.14 KB 0644
microcode_amd.h File 1.41 KB 0644
microcode_intel.h File 2.46 KB 0644
misc.h File 143 B 0644
mmconfig.h File 374 B 0644
mmu.h File 1.57 KB 0644
mmu_context.h File 10.27 KB 0644
mmx.h File 337 B 0644
mmzone.h File 129 B 0644
mmzone_32.h File 1.16 KB 0644
mmzone_64.h File 430 B 0644
module.h File 2.05 KB 0644
mpspec.h File 3.93 KB 0644
mpspec_def.h File 3.93 KB 0644
mpx.h File 2.97 KB 0644
mshyperv.h File 10.69 KB 0644
msi.h File 392 B 0644
msidef.h File 1.77 KB 0644
msr-index.h File 30.36 KB 0644
msr-trace.h File 1.35 KB 0644
msr.h File 10.85 KB 0644
mtrr.h File 4.62 KB 0644
mwait.h File 3.74 KB 0644
nmi.h File 1.39 KB 0644
nops.h File 4.31 KB 0644
nospec-branch.h File 10.87 KB 0644
numa.h File 2.18 KB 0644
numa_32.h File 256 B 0644
olpc.h File 3.16 KB 0644
olpc_ofw.h File 1.1 KB 0644
orc_lookup.h File 1.63 KB 0644
orc_types.h File 3.47 KB 0644
page.h File 2.18 KB 0644
page_32.h File 1.01 KB 0644
page_32_types.h File 1.7 KB 0644
page_64.h File 1.42 KB 0644
page_64_types.h File 2.34 KB 0644
page_types.h File 2.29 KB 0644
paravirt.h File 23.31 KB 0644
paravirt_types.h File 22.15 KB 0644
parport.h File 314 B 0644
pat.h File 768 B 0644
pci-direct.h File 995 B 0644
pci-functions.h File 654 B 0644
pci.h File 3.51 KB 0644
pci_64.h File 684 B 0644
pci_x86.h File 5.71 KB 0644
percpu.h File 18.97 KB 0644
perf_event.h File 8.82 KB 0644
perf_event_p4.h File 26.1 KB 0644
pgalloc.h File 5.57 KB 0644
pgtable-2level.h File 2.75 KB 0644
pgtable-2level_types.h File 867 B 0644
pgtable-3level.h File 10.24 KB 0644
pgtable-3level_types.h File 1.06 KB 0644
pgtable-invert.h File 1.07 KB 0644
pgtable.h File 33.91 KB 0644
pgtable_32.h File 3.1 KB 0644
pgtable_32_types.h File 2.01 KB 0644
pgtable_64.h File 7.37 KB 0644
pgtable_64_types.h File 3.67 KB 0644
pgtable_types.h File 16.75 KB 0644
pkeys.h File 3.17 KB 0644
platform_sst_audio.h File 3.18 KB 0644
pm-trace.h File 611 B 0644
posix_types.h File 144 B 0644
preempt.h File 3.04 KB 0644
probe_roms.h File 273 B 0644
processor-cyrix.h File 879 B 0644
processor-flags.h File 1.71 KB 0644
processor.h File 24.54 KB 0644
prom.h File 1 KB 0644
proto.h File 1003 B 0644
pti.h File 369 B 0644
ptrace.h File 8.52 KB 0644
purgatory.h File 571 B 0644
pvclock-abi.h File 1.49 KB 0644
pvclock.h File 2.64 KB 0644
qrwlock.h File 199 B 0644
qspinlock.h File 2.54 KB 0644
qspinlock_paravirt.h File 1.85 KB 0644
realmode.h File 1.76 KB 0644
reboot.h File 850 B 0644
reboot_fixups.h File 183 B 0644
refcount.h File 2.83 KB 0644
required-features.h File 2.81 KB 0644
rio.h File 2.57 KB 0644
rmwcc.h File 1.62 KB 0644
rwsem.h File 7.02 KB 0644
seccomp.h File 510 B 0644
sections.h File 465 B 0644
segment.h File 9.47 KB 0644
serial.h File 1.11 KB 0644
set_memory.h File 3.86 KB 0644
setup.h File 3.4 KB 0644
setup_arch.h File 77 B 0644
shmparam.h File 193 B 0644
sigcontext.h File 261 B 0644
sigframe.h File 2.25 KB 0644
sighandling.h File 649 B 0644
signal.h File 2.37 KB 0644
simd.h File 287 B 0644
smap.h File 1.71 KB 0644
smp.h File 4.73 KB 0644
sparsemem.h File 1.01 KB 0644
spec-ctrl.h File 2.81 KB 0644
special_insns.h File 5.04 KB 0644
spinlock.h File 1.19 KB 0644
spinlock_types.h File 719 B 0644
sta2x11.h File 352 B 0644
stackprotector.h File 4.13 KB 0644
stacktrace.h File 2.57 KB 0644
string.h File 129 B 0644
string_32.h File 7.74 KB 0644
string_64.h File 3.56 KB 0644
suspend.h File 131 B 0644
suspend_32.h File 822 B 0644
suspend_64.h File 1.79 KB 0644
svm.h File 7.06 KB 0644
swiotlb.h File 991 B 0644
switch_to.h File 2.98 KB 0644
sync_bitops.h File 3.42 KB 0644
sys_ia32.h File 1.8 KB 0644
syscall.h File 5.14 KB 0644
syscalls.h File 1.39 KB 0644
sysfb.h File 2.54 KB 0644
tce.h File 1.68 KB 0644
text-patching.h File 2.3 KB 0644
thread_info.h File 9.33 KB 0644
time.h File 331 B 0644
timer.h File 1 KB 0644
timex.h File 546 B 0644
tlb.h File 1.05 KB 0644
tlbbatch.h File 332 B 0644
tlbflush.h File 17.09 KB 0644
topology.h File 4.84 KB 0644
trace_clock.h File 406 B 0644
traps.h File 5.74 KB 0644
tsc.h File 1.93 KB 0644
uaccess.h File 21.69 KB 0644
uaccess_32.h File 1.54 KB 0644
uaccess_64.h File 5.32 KB 0644
umip.h File 329 B 0644
unaligned.h File 345 B 0644
unistd.h File 1.45 KB 0644
unwind.h File 3.13 KB 0644
unwind_hints.h File 3.01 KB 0644
uprobes.h File 1.57 KB 0644
user.h File 2.2 KB 0644
user32.h File 2.11 KB 0644
user_32.h File 4.92 KB 0644
user_64.h File 5.21 KB 0644
vdso.h File 1.09 KB 0644
vga.h File 740 B 0644
vgtod.h File 2.13 KB 0644
virtext.h File 2.62 KB 0644
vm86.h File 2.16 KB 0644
vmx.h File 23.5 KB 0644
vsyscall.h File 635 B 0644
vvar.h File 1.38 KB 0644
word-at-a-time.h File 2.54 KB 0644
x86_init.h File 9.25 KB 0644
xor.h File 10.26 KB 0644
xor_32.h File 14.4 KB 0644
xor_64.h File 716 B 0644
xor_avx.h File 4.5 KB 0644