Commit 5f55e098 authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Add 64-bit gettimeofday() and clock_gettime() vDSO functions 



Add 64-bit vDSO implementations for gettimeofday() and clock_gettime().

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent e23d9c0b

arch/parisc/kernel/vdso64/Makefile

+21 −4
Original line number Diff line number Diff line 
# List of files in the vdso, has to be asm only for now

# Include the generic Makefile to check the built vdso.

include $(srctree)/lib/vdso/Makefile



KCOV_INSTRUMENT := n



# Disable gcov profiling, ubsan and kasan for VDSO code

GCOV_PROFILE := n

UBSAN_SANITIZE := n

KASAN_SANITIZE := n

KCSAN_SANITIZE := n



obj-vdso64 = note.o sigtramp.o restart_syscall.o

obj-cvdso64 = vdso64_generic.o



# Build rules



targets := $(obj-vdso64) vdso64.so

targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so

obj-vdso64  := $(addprefix $(obj)/, $(obj-vdso64))

obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))



VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE)

CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE)



ccflags-y := -shared -fno-common -fno-builtin

ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
@@ -26,18 +39,22 @@ $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE 


# Force dependency (incbin is bad)

# link rule for the .so file, .lds has to be first

$(obj)/vdso64.so: $(obj)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC) FORCE

$(obj)/vdso64.so: $(obj)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) $(VDSO_LIBGCC) FORCE

	$(call if_changed,vdso64ld)



# assembly rules for the .S files

$(obj-vdso64): %.o: %.S FORCE

	$(call if_changed_dep,vdso64as)

$(obj-cvdso64): %.o: %.c FORCE

	$(call if_changed_dep,vdso64cc)



# actual build commands

quiet_cmd_vdso64ld = VDSO64L $@

      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@

quiet_cmd_vdso64as = VDSO64A $@

      cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<

quiet_cmd_vdso64cc = VDSO64C $@

      cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<



# Generate VDSO offsets using helper script

gen-vdsosym := $(src)/gen_vdso_offsets.sh

arch/parisc/kernel/vdso64/vdso64.lds.S

+2 −0
Original line number Diff line number Diff line
@@ -104,6 +104,8 @@ VERSION 
    global:

	__kernel_sigtramp_rt64;

	__kernel_restart_syscall64;

	__vdso_gettimeofday;

	__vdso_clock_gettime;

    local: *;

  };

}

arch/parisc/kernel/vdso64/vdso64_generic.c

0 → 100644
+24 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include "asm/unistd.h"

#include <linux/types.h>



struct timezone;

struct __kernel_timespec;

struct __kernel_old_timeval;



/* forward declarations */

int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);

int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);





int __vdso_gettimeofday(struct __kernel_old_timeval *tv,

			struct timezone *tz)

{

	return syscall2(__NR_gettimeofday, (long)tv, (long)tz);

}



int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)

{

	return syscall2(__NR_clock_gettime, (long)clock, (long)ts);

}