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Re: [Qemu-devel] [PATCH v4 01/32] target-xtensa: add target stubs


From: Blue Swirl
Subject: Re: [Qemu-devel] [PATCH v4 01/32] target-xtensa: add target stubs
Date: Sun, 4 Sep 2011 18:14:56 +0000

On Thu, Sep 1, 2011 at 8:45 PM, Max Filippov <address@hidden> wrote:
> Signed-off-by: Max Filippov <address@hidden>
> ---
>  Makefile.target           |    2 +
>  arch_init.c               |    2 +
>  arch_init.h               |    1 +
>  cpu-exec.c                |    2 +
>  elf.h                     |    2 +
>  hw/xtensa_pic.c           |   38 ++++++++++++++++++
>  target-xtensa/cpu.h       |   95 
> +++++++++++++++++++++++++++++++++++++++++++++
>  target-xtensa/helper.c    |   73 ++++++++++++++++++++++++++++++++++
>  target-xtensa/machine.c   |   38 ++++++++++++++++++
>  target-xtensa/op_helper.c |   52 ++++++++++++++++++++++++
>  target-xtensa/translate.c |   67 +++++++++++++++++++++++++++++++
>  11 files changed, 372 insertions(+), 0 deletions(-)
>  create mode 100644 hw/xtensa_pic.c
>  create mode 100644 target-xtensa/cpu.h
>  create mode 100644 target-xtensa/helper.c
>  create mode 100644 target-xtensa/machine.c
>  create mode 100644 target-xtensa/op_helper.c
>  create mode 100644 target-xtensa/translate.c
>
> diff --git a/Makefile.target b/Makefile.target
> index 07af4d4..b833c10 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -373,6 +373,8 @@ obj-s390x-y = s390-virtio-bus.o s390-virtio.o
>  obj-alpha-y = i8259.o mc146818rtc.o
>  obj-alpha-y += vga.o cirrus_vga.o
>
> +obj-xtensa-y += xtensa_pic.o
> +
>  main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
>
>  monitor.o: hmp-commands.h qmp-commands.h
> diff --git a/arch_init.c b/arch_init.c
> index 567ab32..9a5a0e3 100644
> --- a/arch_init.c
> +++ b/arch_init.c
> @@ -78,6 +78,8 @@ const char arch_config_name[] = CONFIG_QEMU_CONFDIR 
> "/target-" TARGET_ARCH ".con
>  #define QEMU_ARCH QEMU_ARCH_SH4
>  #elif defined(TARGET_SPARC)
>  #define QEMU_ARCH QEMU_ARCH_SPARC
> +#elif defined(TARGET_XTENSA)
> +#define QEMU_ARCH QEMU_ARCH_XTENSA
>  #endif
>
>  const uint32_t arch_type = QEMU_ARCH;
> diff --git a/arch_init.h b/arch_init.h
> index 2de9f08..a74187a 100644
> --- a/arch_init.h
> +++ b/arch_init.h
> @@ -17,6 +17,7 @@ enum {
>     QEMU_ARCH_S390X = 512,
>     QEMU_ARCH_SH4 = 1024,
>     QEMU_ARCH_SPARC = 2048,
> +    QEMU_ARCH_XTENSA = 4096,
>  };
>
>  extern const uint32_t arch_type;
> diff --git a/cpu-exec.c b/cpu-exec.c
> index de0d716..3fce033 100644
> --- a/cpu-exec.c
> +++ b/cpu-exec.c
> @@ -222,6 +222,7 @@ int cpu_exec(CPUState *env)
>  #elif defined(TARGET_SH4)
>  #elif defined(TARGET_CRIS)
>  #elif defined(TARGET_S390X)
> +#elif defined(TARGET_XTENSA)
>     /* XXXXX */
>  #else
>  #error unsupported target CPU
> @@ -616,6 +617,7 @@ int cpu_exec(CPUState *env)
>  #elif defined(TARGET_ALPHA)
>  #elif defined(TARGET_CRIS)
>  #elif defined(TARGET_S390X)
> +#elif defined(TARGET_XTENSA)
>     /* XXXXX */
>  #else
>  #error unsupported target CPU
> diff --git a/elf.h b/elf.h
> index ffcac7e..2e05d34 100644
> --- a/elf.h
> +++ b/elf.h
> @@ -125,6 +125,8 @@ typedef int64_t  Elf64_Sxword;
>  #define EM_MICROBLAZE      189
>  #define EM_MICROBLAZE_OLD  0xBAAB
>
> +#define EM_XTENSA   94      /* Tensilica Xtensa */
> +
>  /* This is the info that is needed to parse the dynamic section of the file 
> */
>  #define DT_NULL                0
>  #define DT_NEEDED      1
> diff --git a/hw/xtensa_pic.c b/hw/xtensa_pic.c
> new file mode 100644
> index 0000000..91a5445
> --- /dev/null
> +++ b/hw/xtensa_pic.c
> @@ -0,0 +1,38 @@
> +/*
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#include "hw.h"
> +#include "pc.h"
> +
> +/* Stub functions for hardware that doesn't exist.  */
> +void pic_info(Monitor *mon)
> +{
> +}
> +
> +void irq_info(Monitor *mon)
> +{
> +}
> diff --git a/target-xtensa/cpu.h b/target-xtensa/cpu.h
> new file mode 100644
> index 0000000..a51ffc8
> --- /dev/null
> +++ b/target-xtensa/cpu.h
> @@ -0,0 +1,95 @@
> +/*
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#ifndef CPU_XTENSA_H
> +#define CPU_XTENSA_H
> +
> +#define TARGET_LONG_BITS 32
> +#define ELF_MACHINE EM_XTENSA
> +
> +#define CPUState struct CPUXtensaState
> +
> +#include "config.h"
> +#include "qemu-common.h"
> +#include "cpu-defs.h"
> +
> +#define TARGET_HAS_ICE 1
> +
> +#define NB_MMU_MODES 4
> +
> +#define TARGET_PHYS_ADDR_SPACE_BITS 32
> +#define TARGET_VIRT_ADDR_SPACE_BITS 32
> +#define TARGET_PAGE_BITS 12
> +
> +typedef struct CPUXtensaState {
> +    uint32_t regs[16];
> +    uint32_t pc;
> +    uint32_t sregs[256];
> +
> +    CPU_COMMON
> +} CPUXtensaState;
> +
> +#define cpu_init cpu_xtensa_init
> +#define cpu_exec cpu_xtensa_exec
> +#define cpu_gen_code cpu_xtensa_gen_code
> +#define cpu_signal_handler cpu_xtensa_signal_handler
> +#define cpu_list xtensa_cpu_list
> +
> +CPUXtensaState *cpu_xtensa_init(const char *cpu_model);
> +void xtensa_translate_init(void);
> +int cpu_xtensa_exec(CPUXtensaState *s);
> +void do_interrupt(CPUXtensaState *s);
> +int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
> +void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
> +
> +static inline int cpu_mmu_index(CPUState *env)
> +{
> +    return 0;
> +}
> +
> +static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
> +        target_ulong *cs_base, int *flags)
> +{
> +    *pc = env->pc;
> +    *cs_base = 0;
> +    *flags = 0;
> +}
> +
> +#include "cpu-all.h"
> +#include "exec-all.h"
> +
> +static inline int cpu_has_work(CPUState *env)
> +{
> +    return 1;
> +}
> +
> +static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
> +{
> +    env->pc = tb->pc;
> +}
> +
> +#endif
> diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c
> new file mode 100644
> index 0000000..dc30e00
> --- /dev/null
> +++ b/target-xtensa/helper.c
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#include "cpu.h"
> +#include "exec-all.h"
> +#include "gdbstub.h"
> +#include "qemu-common.h"
> +#include "host-utils.h"
> +#if !defined(CONFIG_USER_ONLY)
> +#include "hw/loader.h"
> +#endif
> +
> +void cpu_reset(CPUXtensaState *env)
> +{
> +    env->pc = 0;
> +}
> +
> +CPUXtensaState *cpu_xtensa_init(const char *cpu_model)
> +{
> +    static int tcg_inited;
> +    CPUXtensaState *env;
> +
> +    env = g_malloc0(sizeof(*env));
> +    cpu_exec_init(env);
> +
> +    if (!tcg_inited) {
> +        tcg_inited = 1;
> +        xtensa_translate_init();
> +    }
> +
> +    qemu_init_vcpu(env);
> +    return env;
> +}
> +
> +
> +void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
> +{
> +    cpu_fprintf(f, "Available CPUs:\n"
> +            "  Xtensa core\n");
> +}
> +
> +target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
> +{
> +    return addr;
> +}
> +
> +void do_interrupt(CPUState *env)
> +{
> +}
> diff --git a/target-xtensa/machine.c b/target-xtensa/machine.c
> new file mode 100644
> index 0000000..ddeffb2
> --- /dev/null
> +++ b/target-xtensa/machine.c
> @@ -0,0 +1,38 @@
> +/*
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#include "hw/hw.h"
> +#include "hw/boards.h"
> +
> +void cpu_save(QEMUFile *f, void *opaque)
> +{
> +}
> +
> +int cpu_load(QEMUFile *f, void *opaque, int version_id)
> +{
> +    return 0;
> +}
> diff --git a/target-xtensa/op_helper.c b/target-xtensa/op_helper.c
> new file mode 100644
> index 0000000..aafa33d
> --- /dev/null
> +++ b/target-xtensa/op_helper.c
> @@ -0,0 +1,52 @@
> +/*
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#include "cpu.h"
> +#include "dyngen-exec.h"
> +
> +#define MMUSUFFIX _mmu
> +
> +#define SHIFT 0
> +#include "softmmu_template.h"
> +
> +#define SHIFT 1
> +#include "softmmu_template.h"
> +
> +#define SHIFT 2
> +#include "softmmu_template.h"
> +
> +#define SHIFT 3
> +#include "softmmu_template.h"
> +
> +void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr)
> +{
> +    tlb_set_page(cpu_single_env,
> +            addr & ~(TARGET_PAGE_SIZE - 1),
> +            addr & ~(TARGET_PAGE_SIZE - 1),
> +            PAGE_READ | PAGE_WRITE | PAGE_EXEC,
> +            mmu_idx, TARGET_PAGE_SIZE);
> +}
> diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
> new file mode 100644
> index 0000000..e91d8a5
> --- /dev/null
> +++ b/target-xtensa/translate.c
> @@ -0,0 +1,67 @@
> +/*
> + * Xtensa ISA:
> + * 
> http://www.tensilica.com/products/literature-docs/documentation/xtensa-isa-databook.htm
> + *
> + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are 
> met:
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * 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.
> + *     * Neither the name of the Open Source and Linux Lab nor the
> + *       names of its contributors may be used to endorse or promote products
> + *       derived from this software without specific prior written 
> permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 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.
> + */
> +
> +#include <stdio.h>
> +
> +#include "cpu.h"
> +#include "exec-all.h"
> +#include "disas.h"
> +#include "tcg-op.h"
> +#include "qemu-log.h"
> +
> +
> +void xtensa_translate_init(void)
> +{
> +}
> +
> +void gen_intermediate_code(CPUState *env, TranslationBlock *tb)
> +{
> +}
> +
> +void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
> +{
> +}
> +
> +void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
> +        int flags)
> +{
> +    int i;
> +
> +    cpu_fprintf(f, "PC=%08x\n", env->pc);
> +
> +    for (i = 0; i < 16; ++i)

Missing braces.

> +        cpu_fprintf(f, "A%02d=%08x%c", i, env->regs[i],
> +                (i % 4) == 3 ? '\n' : ' ');
> +}
> +
> +void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos)
> +{
> +    env->pc = gen_opc_pc[pc_pos];
> +}
> --
> 1.7.6
>
>
>



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