2017-08-20 4:17 GMT+02:00 Hesham Almatary <heshamelmat...@gmail.com>:
> You can try to share this file (with RISC-V based BSPs and other
> shared linkcmds if any that are arch-independent) and avoid
> duplications, and only include the relevant parts of your HiFive
> boards, similar to ARM-based BSPs.
>
> It's important you try to address comments/feedback; students should
> go through the code review process, etc it's one of the goals of
> Google Summer of Code and open-source involvement.
>
> On Fri, Aug 18, 2017 at 2:59 AM, Denis Obrezkov <denisobrez...@gmail.com>
> wrote:
> > 2017-08-17 16:57 GMT+02:00 Gedare Bloom <ged...@rtems.org>:
> >>
> >> On Wed, Aug 16, 2017 at 11:12 AM, Denis Obrezkov
> >> <denisobrez...@gmail.com> wrote:
> >> > ---
> >> > c/src/lib/libbsp/riscv32/hifive1/startup/linkcmds | 379
> >> > ++++++++++++++++++++++
> >> > 1 file changed, 379 insertions(+)
> >> > create mode 100644 c/src/lib/libbsp/riscv32/hifive1/startup/linkcmds
> >> >
> >> > diff --git a/c/src/lib/libbsp/riscv32/hifive1/startup/linkcmds
> >> > b/c/src/lib/libbsp/riscv32/hifive1/startup/linkcmds
> >> > new file mode 100644
> >> > index 0000000..8bf56a0
> >> > --- /dev/null
> >> > +++ b/c/src/lib/libbsp/riscv32/hifive1/startup/linkcmds
> >> > @@ -0,0 +1,379 @@
> >> > +/**
> >> > + * @file
> >> > + *
> >> > + * @ingroup bsp_linker
> >> > + *
> >> > + * @brief Memory map
> >> > + */
> >> > +
> >> > +/*
> >> > + *
> >> > + * Copyright (c) 2015 University of York.
> >> > + * Hesham ALMatary <hmka...@york.ac.uk>
> >> > + *
> >> > + * Redistribution and use in source and binary forms, with or without
> >> > + * modification, are permitted provided that the following conditions
> >> > + * are met:
> >> > + * 1. Redistributions of source code must retain the above copyright
> >> > + * notice, this list of conditions and the following disclaimer.
> >> > + * 2. Redistributions in binary form must reproduce the above
> copyright
> >> > + * notice, this list of conditions and the following disclaimer in
> >> > the
> >> > + * documentation and/or other materials provided with the
> >> > distribution.
> >> > + *
> >> > + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
> >> > AND
> >> > + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
> >> > THE
> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
> >> > PURPOSE
> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
> >> > LIABLE
> >> > + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >> > CONSEQUENTIAL
> >> > + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
> >> > GOODS
> >> > + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >> > INTERRUPTION)
> >> > + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT,
> >> > STRICT
> >> > + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
> >> > ANY WAY
> >> > + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY
> >> > OF
> >> > + * SUCH DAMAGE.
> >> > + */
> >> > +
> >> > +OUTPUT_FORMAT("elf32-littleriscv", "elf32-littleriscv",
> >> > "elf32-littleriscv")
> >> > +OUTPUT_ARCH (riscv)
> >> > +
> >> > +ENTRY (_start)
> >> > +
> >> > +MEMORY
> >> > +{
> >> > + ROM : ORIGIN = 0x20400000, LENGTH = 16M
> >> > + RAM : ORIGIN = 0x80000000, LENGTH = 16K /* 64KiB external
> RAM,
> >> > but gdb knows only about 16 KiB */
> >> Is there actually 64K ram?
> >>
> >> I don't have the knowledge to review the rest of this for correctness.
> >> It would be good to have a shared linkcmds approach though, like ARM.
> >>
> >> > + ITIM : ORIGIN = 0x08000000, LENGTH = 8K
> >> > +}
> >> > +
> >> > +REGION_ALIAS ("REGION_VECTOR", ROM);
> >> > +REGION_ALIAS ("REGION_START", ROM);
> >> > +REGION_ALIAS ("REGION_TEXT", ROM);
> >> > +REGION_ALIAS ("REGION_TEXT_LOAD", ROM);
> >> > +REGION_ALIAS ("REGION_RODATA", ROM);
> >> > +REGION_ALIAS ("REGION_RODATA_LOAD", ROM);
> >> > +REGION_ALIAS ("REGION_DATA", RAM);
> >> > +REGION_ALIAS ("REGION_DATA_LOAD", ROM);
> >> > +REGION_ALIAS ("REGION_FAST_DATA", RAM);
> >> > +REGION_ALIAS ("REGION_FAST_DATA_LOAD", ROM);
> >> > +REGION_ALIAS ("REGION_BSS", RAM);
> >> > +REGION_ALIAS ("REGION_WORK", RAM);
> >> > +REGION_ALIAS ("REGION_STACK", RAM);
> >> > +
> >> > +/* The following address is used for text output */
> >> > +/* bsp_section_outbut_buffer = 0x8F800000; */
> >> > + bsp_section_vector_begin = 0x20400000;
> >> > +
> >> > +
> >> > +STACK_LENGTH = 0;
> >> > +/*
> >> > + * Global symbols that may be defined externally
> >> > + */
> >> > +bsp_vector_table_size = DEFINED (bsp_vector_table_size) ?
> >> > bsp_vector_table_size : 64;
> >> > +
> >> > +bsp_section_xbarrier_align = DEFINED (bsp_section_xbarrier_align) ?
> >> > bsp_section_xbarrier_align : 1;
> >> > +bsp_section_robarrier_align = DEFINED (bsp_section_robarrier_align) ?
> >> > bsp_section_robarrier_align : 1;
> >> > +bsp_section_rwbarrier_align = DEFINED (bsp_section_rwbarrier_align) ?
> >> > bsp_section_rwbarrier_align : 1;
> >> > +
> >> > +bsp_stack_align = DEFINED (bsp_stack_align) ? bsp_stack_align : 8;
> >> > +
> >> > +bsp_stack_main_size = DEFINED (bsp_stack_main_size) ?
> >> > bsp_stack_main_size : 1024;
> >> > +bsp_stack_main_size = ALIGN (bsp_stack_main_size, bsp_stack_align);
> >> > +
> >> > +_bsp_processor_count = DEFINED (_bsp_processor_count) ?
> >> > _bsp_processor_count : 1;
> >> > +
> >> > +SECTIONS {
> >> > +
> >> > + .vector :
> >> > + {
> >> > + . = 0x100;
> >> > + *(.vector)
> >> > + . = ALIGN(bsp_vector_table_size);
> >> > + bsp_section_vector_end = .;
> >> > + } > REGION_VECTOR AT > REGION_VECTOR
> >> > + bsp_section_vector_size = bsp_section_vector_end -
> >> > bsp_section_vector_begin;
> >> > + bsp_vector_table_begin = bsp_section_vector_begin;
> >> > + bsp_vector_table_end = bsp_vector_table_begin +
> >> > bsp_vector_table_size;
> >> > +
> >> > + .start :
> >> > + {
> >> > + . = ALIGN(8);
> >> > + bsp_section_start_begin = .;
> >> > + KEEP (*(.bsp_start_text))
> >> > + KEEP (*(.bsp_start_data))
> >> > + bsp_section_start_end = .;
> >> > + } > REGION_START AT > REGION_START
> >> > + bsp_section_start_size = bsp_section_start_end -
> >> > bsp_section_start_begin;
> >> > +
> >> > +.xbarrier : {
> >> > + . = ALIGN (bsp_section_xbarrier_align);
> >> > + } > REGION_VECTOR AT > REGION_VECTOR
> >> > +
> >> > +.text : {
> >> > + . = ALIGN(8);
> >> > + bsp_section_text_begin = .;
> >> > + *(.text.unlikely .text.*_unlikely)
> >> > + *(.text .stub .text.* .gnu.linkonce.t.*)
> >> > + /* .gnu.warning sections are handled specially by elf32.em. */
> >> > + *(.gnu.warning)
> >> > + *(.glue_7t) *(.glue_7) *(.vfp11_veneer) *(.v4_bx)
> >> > + } > REGION_TEXT AT > REGION_TEXT_LOAD
> >> > + .init : {
> >> > + KEEP (*(.init))
> >> > + } > REGION_TEXT AT > REGION_TEXT_LOAD
> >> > + .fini : {
> >> > + KEEP (*(.fini))
> >> > + . = ALIGN(8);
> >> > + bsp_section_text_end = .;
> >> > + PROVIDE (__etext = .);
> >> > + PROVIDE (_etext = .);
> >> > + PROVIDE (etext = .);
> >> > +
> >> > + } > REGION_TEXT AT > REGION_TEXT_LOAD
> >> > + bsp_section_text_size = bsp_section_text_end -
> >> > bsp_section_text_begin;
> >> > + bsp_section_text_load_begin = LOADADDR (.text);
> >> > + bsp_section_text_load_end = bsp_section_text_load_begin +
> >> > bsp_section_text_size;
> >> > +
> >> > +.robarrier : {
> >> > + . = ALIGN (bsp_section_robarrier_align);
> >> > + } > REGION_RODATA AT > REGION_RODATA
> >> > +
> >> > +.rodata : {
> >> > + . = ALIGN(8);
> >> > + bsp_section_rodata_begin = .;
> >> > + *(.rodata .rodata.* .gnu.linkonce.r.*)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > +.eh_frame : {
> >> > + KEEP (*(.eh_frame))
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .gcc_except_table : {
> >> > + *(.gcc_except_table .gcc_except_table.*)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .tdata : {
> >> > + _TLS_Data_begin = .;
> >> > + *(.tdata .tdata.* .gnu.linkonce.td.*)
> >> > + _TLS_Data_end = .;
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .tbss : {
> >> > + _TLS_BSS_begin = .;
> >> > + *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon)
> >> > + _TLS_BSS_end = .;
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + _TLS_Data_size = _TLS_Data_end - _TLS_Data_begin;
> >> > + _TLS_Data_begin = _TLS_Data_size != 0 ? _TLS_Data_begin :
> >> > _TLS_BSS_begin;
> >> > + _TLS_Data_end = _TLS_Data_size != 0 ? _TLS_Data_end :
> >> > _TLS_BSS_begin;
> >> > + _TLS_BSS_size = _TLS_BSS_end - _TLS_BSS_begin;
> >> > + _TLS_Size = _TLS_BSS_end - _TLS_Data_begin;
> >> > + _TLS_Alignment = MAX (ALIGNOF (.tdata), ALIGNOF (.tbss));
> >> > + .preinit_array : {
> >> > + PROVIDE_HIDDEN (__preinit_array_start = .);
> >> > + KEEP (*(.preinit_array))
> >> > + PROVIDE_HIDDEN (__preinit_array_end = .);
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .init_array : {
> >> > + PROVIDE_HIDDEN (__init_array_start = .);
> >> > + KEEP (*(SORT(.init_array.*)))
> >> > + KEEP (*(.init_array))
> >> > + PROVIDE_HIDDEN (__init_array_end = .);
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .fini_array : {
> >> > + PROVIDE_HIDDEN (__fini_array_start = .);
> >> > + KEEP (*(.fini_array))
> >> > + KEEP (*(SORT(.fini_array.*)))
> >> > + PROVIDE_HIDDEN (__fini_array_end = .);
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .ctors : {
> >> > + /* gcc uses crtbegin.o to find the start of
> >> > + the constructors, so we make sure it is
> >> > + first. Because this is a wildcard, it
> >> > + doesn't matter if the user does not
> >> > + actually link against crtbegin.o; the
> >> > + linker won't look for a file to match a
> >> > + wildcard. The wildcard also means that it
> >> > + doesn't matter which directory crtbegin.o
> >> > + is in. */
> >> > + KEEP (*crtbegin.o(.ctors))
> >> > + KEEP (*crtbegin?.o(.ctors))
> >> > + /* We don't want to include the .ctor section from
> >> > + the crtend.o file until after the sorted ctors.
> >> > + The .ctor section from the crtend file contains the
> >> > + end of ctors marker and it must be last */
> >> > + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
> >> > + KEEP (*(SORT(.ctors.*)))
> >> > + KEEP (*(.ctors))
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .dtors : {
> >> > + KEEP (*crtbegin.o(.dtors))
> >> > + KEEP (*crtbegin?.o(.dtors))
> >> > + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
> >> > + KEEP (*(SORT(.dtors.*)))
> >> > + KEEP (*(.dtors))
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .data.rel.ro : {
> >> > + *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*)
> >> > + *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .jcr : {
> >> > + KEEP (*(.jcr))
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .interp : {
> >> > + *(.interp)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .note.gnu.build-id : {
> >> > + *(.note.gnu.build-id)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .hash : {
> >> > + *(.hash)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .gnu.hash : {
> >> > + *(.gnu.hash)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .dynsym : {
> >> > + *(.dynsym)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .dynstr : {
> >> > + *(.dynstr)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .gnu.version : {
> >> > + *(.gnu.version)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .gnu.version_d : {
> >> > + *(.gnu.version_d)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .gnu.version_r : {
> >> > + *(.gnu.version_r)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .rel.dyn : {
> >> > + *(.rel.init)
> >> > + *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)
> >> > + *(.rel.fini)
> >> > + *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)
> >> > + *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*)
> >> > + *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)
> >> > + *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)
> >> > + *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*)
> >> > + *(.rel.ctors)
> >> > + *(.rel.dtors)
> >> > + *(.rel.got)
> >> > + *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)
> >> > + PROVIDE_HIDDEN (__rel_iplt_start = .);
> >> > + *(.rel.iplt)
> >> > + PROVIDE_HIDDEN (__rel_iplt_end = .);
> >> > + PROVIDE_HIDDEN (__rela_iplt_start = .);
> >> > + PROVIDE_HIDDEN (__rela_iplt_end = .);
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .rela.dyn : {
> >> > + *(.rela.init)
> >> > + *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)
> >> > + *(.rela.fini)
> >> > + *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)
> >> > + *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)
> >> > + *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)
> >> > + *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)
> >> > + *(.rela.ctors)
> >> > + *(.rela.dtors)
> >> > + *(.rela.got)
> >> > + *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)
> >> > + PROVIDE_HIDDEN (__rel_iplt_start = .);
> >> > + PROVIDE_HIDDEN (__rel_iplt_end = .);
> >> > + PROVIDE_HIDDEN (__rela_iplt_start = .);
> >> > + *(.rela.iplt)
> >> > + PROVIDE_HIDDEN (__rela_iplt_end = .);
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .rel.plt : {
> >> > + *(.rel.plt)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .rela.plt : {
> >> > + *(.rela.plt)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .plt : {
> >> > + *(.plt)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .iplt : {
> >> > + *(.iplt)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .dynamic : {
> >> > + *(.dynamic)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .got : {
> >> > + *(.got.plt) *(.igot.plt) *(.got) *(.igot)
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + .rtemsroset : {
> >> > + /* Special FreeBSD linker set sections */
> >> > + __start_set_sysctl_set = .;
> >> > + *(set_sysctl_*);
> >> > + __stop_set_sysctl_set = .;
> >> > + *(set_domain_*);
> >> > + *(set_pseudo_*);
> >> > +
> >> > + KEEP (*(SORT(.rtemsroset.*)))
> >> > + . = ALIGN(8);
> >> > + bsp_section_rodata_end = .;
> >> > + __data_start_rom = .;
> >> > + } > REGION_RODATA AT > REGION_RODATA_LOAD
> >> > + bsp_section_rodata_size = bsp_section_rodata_end -
> >> > bsp_section_rodata_begin;
> >> > + bsp_section_rodata_load_begin = LOADADDR (.rodata);
> >> > + bsp_section_rodata_load_end = bsp_section_rodata_load_begin +
> >> > bsp_section_rodata_size;
> >> > +
> >> > +
> >> > +
> >> > +.data : AT (__data_start_rom) {
> >> > + . = ALIGN(8);
> >> > + bsp_section_data_begin = .;
> >> > + PROVIDE (_copy_start = .);
> >> > + *(.data .data.* .gnu.linkonce.d.* .data1)
> >> > + SORT(CONSTRUCTORS)
> >> > + } > REGION_DATA
> >> > + .rtemsrwset : AT (__data_start_rom + SIZEOF (.data)) {
> >> > + KEEP (*(SORT(.rtemsrwset.*)))
> >> > + . = ALIGN(8);
> >> > +
> >> > + } > REGION_DATA
> >> > + bsp_section_data_size = bsp_section_data_end -
> >> > bsp_section_data_begin;
> >> > + bsp_section_data_load_begin = LOADADDR (.data);
> >> > + bsp_section_data_load_end = bsp_section_data_load_begin +
> >> > bsp_section_data_size;
> >> > +
> >> > +.rwbarrier : AT (__data_start_rom + SIZEOF (.data) + SIZEOF
> >> > (.rtemsrwset)) {
> >> > + . = ALIGN(8);
> >> > + . = ALIGN (bsp_section_rwbarrier_align);
> >> > + bsp_section_data_end = .;
> >> > + PROVIDE (_copy_end = .);
> >> > + } > REGION_DATA
> >> > +
> >> > + .bss : {
> >> > + . = ALIGN(8);
> >> > + bsp_section_bss_begin = .;
> >> > + *(.dynbss)
> >> > + *(.bss .bss.* .gnu.linkonce.b.*)
> >> > + *(COMMON)
> >> > + . = ALIGN(8);
> >> > + bsp_section_bss_end = .;
> >> > + } > REGION_BSS AT > REGION_BSS
> >> > + bsp_section_bss_size = bsp_section_bss_end - bsp_section_bss_begin;
> >> > +
> >> > +.work : {
> >> > + /*
> >> > + * The work section will occupy the remaining REGION_WORK region
> >> > and
> >> > + * contains the RTEMS work space and heap.
> >> > + */
> >> > + . = ALIGN(8);
> >> > + bsp_section_work_begin = .;
> >> > + . += ORIGIN (REGION_WORK) + LENGTH (REGION_WORK) - ABSOLUTE (.) -
> >> > STACK_LENGTH;
> >> > + . = ALIGN(8);
> >> > + bsp_section_work_end = .;
> >> > + } > REGION_WORK AT > REGION_WORK
> >> > + bsp_section_work_size = bsp_section_work_end -
> >> > bsp_section_work_begin;
> >> > +
> >> > + .stack : {
> >> > + . = ALIGN(8);
> >> > + bsp_section_stack_begin = .;
> >> > + . += ORIGIN (REGION_STACK) + LENGTH (REGION_STACK) - ABSOLUTE
> (.);
> >> > + . = ALIGN(8);
> >> > + bsp_section_stack_end = .;
> >> > + } > REGION_STACK AT > REGION_STACK
> >> > + bsp_section_stack_size = bsp_section_stack_end -
> >> > bsp_section_stack_begin;
> >> > +
> >> > + RamBase = ORIGIN (REGION_WORK);
> >> > + RamSize = LENGTH (REGION_WORK);
> >> > + WorkAreaBase = bsp_section_work_begin;
> >> > + HeapSize = 0;
> >> > +}
> >> > --
> >> > 2.1.4
> >> >
> >> > _______________________________________________
> >> > devel mailing list
> >> > devel@rtems.org
> >> > http://lists.rtems.org/mailman/listinfo/devel
> >
> >
> > Yes, there is only 16 KiB of RAM, should remove the comment.
> > I remember about linkcmds, but don't have time to implement it properly
> now.
> >
> >
> > --
> > Regards, Denis Obrezkov
> >
> > _______________________________________________
> > devel mailing list
> > devel@rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
>
>
>
> --
> Hesham
>
As I said earlier, it would be very hard for me to implement a shared
linker file.
(may be not hard, but time-consuming)
At this moment I want to provide a working solution that everyone can try.
And as I can see now both our ports are unstable, so I also can't see the
reason
to implement this linker file right now.
--
Regards, Denis Obrezkov
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