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https://github.com/DragonOS-Community/DragonOS.git
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实现gettimeofday()系统调用和clocksource+timekeeping子模块 (#278)
- 实现gettimeofday()系统调用 - 实现clocksource+timekeeping子模块部分功能 - 实现了timespec转换成日期时间
This commit is contained in:
houmkh
GitHub
25
user/apps/test_gettimeofday/Makefile
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25
user/apps/test_gettimeofday/Makefile
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CC=$(DragonOS_GCC)/x86_64-elf-gcc
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LD=ld
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OBJCOPY=objcopy
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# 修改这里，把它改为你的relibc的sysroot路径
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RELIBC_OPT=$(DADK_BUILD_CACHE_DIR_RELIBC_0_1_0)
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CFLAGS=-I $(RELIBC_OPT)/include
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tmp_output_dir=$(ROOT_PATH)/bin/tmp/user
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output_dir=$(DADK_BUILD_CACHE_DIR_TEST_GETTIMEOFDAY_0_1_0)
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LIBC_OBJS:=$(shell find $(RELIBC_OPT)/lib -name "*.o" | sort )
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LIBC_OBJS+=$(RELIBC_OPT)/lib/libc.a
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all: main.o
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mkdir -p $(tmp_output_dir)
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$(LD) -b elf64-x86-64 -z muldefs -o $(tmp_output_dir)/test_gettimeofday $(shell find . -name "*.o") $(LIBC_OBJS) -T link.lds
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$(OBJCOPY) -I elf64-x86-64 -R ".eh_frame" -R ".comment" -O elf64-x86-64 $(tmp_output_dir)/test_gettimeofday $(output_dir)/test_gettimeofday.elf
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mv $(output_dir)/test_gettimeofday.elf $(output_dir)/test_gettimeofday
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main.o: main.c
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$(CC) $(CFLAGS) -c main.c -o main.o
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clean:
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rm -f *.o
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239
user/apps/test_gettimeofday/link.lds
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user/apps/test_gettimeofday/link.lds
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/* Script for -z combreloc */
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/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
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Copying and distribution of this script, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. */
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OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64",
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"elf64-x86-64")
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OUTPUT_ARCH(i386:x86-64)
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ENTRY(_start)
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SECTIONS
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}
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. = ALIGN(CONSTANT (MAXPAGESIZE));
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.init :
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KEEP (*(SORT_NONE(.init)))
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*(.text.unlikely .text.*_unlikely .text.unlikely.*)
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KEEP (*(SORT_NONE(.fini)))
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PROVIDE (__etext = .);
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PROVIDE (_etext = .);
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PROVIDE (etext = .);
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. = ALIGN(CONSTANT (MAXPAGESIZE));
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the same address within the page on the next page up. */
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. = SEGMENT_START("rodata-segment", ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1)));
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.eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) *(.eh_frame.*) }
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.gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
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.gnu_extab : ONLY_IF_RO { *(.gnu_extab*) }
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/* These sections are generated by the Sun/Oracle C++ compiler. */
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.exception_ranges : ONLY_IF_RO { *(.exception_ranges*) }
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/* Adjust the address for the data segment. We want to adjust up to
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the same address within the page on the next page up. */
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. = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
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/* Exception handling */
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.eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) *(.eh_frame.*) }
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.gnu_extab : ONLY_IF_RW { *(.gnu_extab) }
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/* Thread Local Storage sections */
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.tdata :
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{
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PROVIDE_HIDDEN (__tdata_start = .);
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*(.tdata .tdata.* .gnu.linkonce.td.*)
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}
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.tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
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.preinit_array :
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{
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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}
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
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PROVIDE_HIDDEN (__init_array_end = .);
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}
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
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PROVIDE_HIDDEN (__fini_array_end = .);
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}
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.ctors :
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{
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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/* We don't want to include the .ctor section from
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the crtend.o file until after the sorted ctors.
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The .ctor section from the crtend file contains the
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end of ctors marker and it must be last */
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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}
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*crtbegin?.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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}
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.got : { *(.got) *(.igot) }
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. = DATA_SEGMENT_RELRO_END (SIZEOF (.got.plt) >= 24 ? 24 : 0, .);
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.got.plt : { *(.got.plt) *(.igot.plt) }
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.data :
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{
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*(.data .data.* .gnu.linkonce.d.*)
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SORT(CONSTRUCTORS)
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}
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.data1 : { *(.data1) }
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_edata = .; PROVIDE (edata = .);
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. = .;
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__bss_start = .;
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{
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*(.dynbss)
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*(.bss .bss.* .gnu.linkonce.b.*)
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_end. Align after .bss to ensure correct alignment even if the
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.bss section disappears because there are no input sections.
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FIXME: Why do we need it? When there is no .bss section, we do not
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pad the .data section. */
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. = ALIGN(. != 0 ? 64 / 8 : 1);
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}
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*(.dynlbss)
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}
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. = ALIGN(64 / 8);
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. = DATA_SEGMENT_END (.);
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/* Stabs debugging sections. */
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}
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25
user/apps/test_gettimeofday/main.c
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user/apps/test_gettimeofday/main.c
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#include <sys/time.h>
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#include <stdio.h>
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#include <stdlib.h>
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// #include <sleep.h>
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#include <unistd.h>
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#include <time.h>
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int main()
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{
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struct timeval *tv = malloc(sizeof(struct timeval));
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// struct timezone *tz = malloc(sizeof(struct timezone));
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// for (int i = 0; i < 15; i++)
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// {
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// gettimeofday(tv, NULL);
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// printf("%ld.%06ld\n", tv->tv_sec, tv->tv_usec);
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// for (int i = 0; i < 10; i++)
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// {
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// usleep(500000);
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// }
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// }
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gettimeofday(tv, NULL);
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printf("tv = %ld.%06ld\n", tv->tv_sec, tv->tv_usec);
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// printf("tz_minuteswest = %d,tz_dsttime = %d", (*tz).tz_minuteswest, (*tz).tz_dsttime);
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return 0;
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}
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