Полухостинг QEMU не производит вывод

Я пытаюсь настроить среду тестирования для своего проекта, используя полухостинг в QEMU. До сих пор у меня не было проблем с выполнением этого ответа , однако у меня возникли проблемы с его работой с CMake.

Вот как я строю то же самое hello.c( файл цепочки инструментов на pastebin):

      C:\hello_cmake>cmake -G"Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=toolchain.cmake . -Btmp
-- The C compiler identification is GNU 10.3.1
-- The CXX compiler identification is GNU 10.3.1
-- Configuring done
-- Generating done
-- Build files have been written to: C:/hello_cmake/tmp

C:\hello_cmake>cmake --build tmp --verbose
"C:/Program Files/CMake/bin/cmake.exe" -SC:/hello_cmake -BC:/hello_cmake/tmp --check-build-system CMakeFiles/Makefile.cmake 0
"C:/Program Files/CMake/bin/cmake.exe" -E cmake_progress_start C:/hello_cmake/tmp/CMakeFiles C:/hello_cmake/tmp//CMakeFiles/progress.marks
C:/buildtools/bin/make.exe  -f CMakeFiles/Makefile2 all
make.exe[1]: Entering directory 'C:/hello_cmake/tmp'
C:/buildtools/bin/make.exe  -f CMakeFiles/hello.dir/build.make CMakeFiles/hello.dir/depend
make.exe[2]: Entering directory 'C:/hello_cmake/tmp'
"C:/Program Files/CMake/bin/cmake.exe" -E cmake_depends "Unix Makefiles" C:/hello_cmake C:/hello_cmake C:/hello_cmake/tmp C:/hello_cmake/tmp C:/hello_cmake/tmp/CMakeFiles/hello.dir/DependInfo.cmake --color=
make.exe[2]: Leaving directory 'C:/hello_cmake/tmp'
C:/buildtools/bin/make.exe  -f CMakeFiles/hello.dir/build.make CMakeFiles/hello.dir/build
make.exe[2]: Entering directory 'C:/hello_cmake/tmp'
[ 50%] Building C object CMakeFiles/hello.dir/hello.c.obj
"C:/Program Files (x86)/GNU Arm Embedded Toolchain/10 2021.10/bin/arm-none-eabi-gcc.exe"   -specs=rdimon.specs -mcpu=cortex-a9 -O0 -g -MD -MT CMakeFiles/hello.dir/hello.c.obj -MF CMakeFiles/hello.dir/hello.c.obj.d -o CMakeFiles/hello.dir/hello.c.obj -c C:/hello_cmake/hello.c
[100%] Linking C executable hello
"C:/Program Files (x86)/GNU Arm Embedded Toolchain/10 2021.10/bin/arm-none-eabi-gcc.exe"  -lc -lrdimon -lc -lrdimon "CMakeFiles/hello.dir/hello.c.obj"  -o hello
make.exe[2]: Leaving directory 'C:/hello_cmake/tmp'
[100%] Built target hello
make.exe[1]: Leaving directory 'C:/hello_cmake/tmp'
"C:/Program Files/CMake/bin/cmake.exe" -E cmake_progress_start C:/hello_cmake/tmp/CMakeFiles 0

И вот как я вызываю QEMU:

      qemu-system-arm.exe -nographic -machine xilinx-zynq-a9 -cpu cortex-a9 -monitor none -serial stdio -kernel app -m 512 -semihosting

Однако QEMU почти сразу завершает работу, не производя никакого вывода. -d execа также -d initлоги выглядят так, будто код запущен, и полухостинг действительно работает:

      ...
Trace 0: 0000000004705540 [00000400/0000828c/000005a0/ff000000] __libc_init_array
Trace 0: 0000000004705780 [00000400/000081ec/000005a0/ff000000] frame_dummy
Trace 0: 00000000047058c0 [00000400/00010460/000005a0/ff000000] main
Trace 0: 0000000004705c00 [00000400/00029158/000005a0/ff000000] printf
Trace 0: 0000000004706040 [00000400/000301f0/000005a0/ff000000] _vfprintf_r
Trace 0: 0000000004706440 [00000400/000375b8/000005a0/ff000000] _localeconv_r
Trace 0: 00000000047065c0 [00000400/0003020c/000005a0/ff000000] _vfprintf_r
Trace 0: 00000000047067c0 [00000400/0000a704/000005a0/ff000000] strlen
...

Taking exception 16 [Semihosting call] on CPU 0
...from EL1 to EL0
...handling as semihosting call 0xc
Taking exception 16 [Semihosting call] on CPU 0
...from EL1 to EL0
...handling as semihosting call 0x13
Taking exception 16 [Semihosting call] on CPU 0
...from EL1 to EL0
...handling as semihosting call 0x5
Taking exception 16 [Semihosting call] on CPU 0
...from EL1 to EL0
...

Вопрос в том, что делает (или не делает) CMake, что ломает printfвыход?

Для записи:

  • arm-none-eabi-gcc (GNU Arm Embedded Toolchain 10.3-2021.10)
  • QEMU emulator version 7.0.0 (v7.0.0-11902-g1d935f4a02-dirty)
  • Microsoft Windows [Version 10.0.19044.1645]
  • cmake version 3.22.2
Источник

1 ответ

Мне не удалось найти то, что вы используете, но я смог создать/запустить hello.elfиспользуя следующие файлы:

hello.c:

      #include <stdlib.h>
#include <stdio.h>

int main(int argc, char** argv)
{
    printf("Hello, World!\n");
    return EXIT_SUCCESS;
}

CMakeLists.lst:

      project(hello_world)
add_executable(hello.elf hello.c)

toolchain.cmake(удаленный -specs=rdimon.specs, так как это больше вариант связывания, используя --specs=rdimon.specsвариант для линкера - -lcне нужен, т.к. избыточен при использовании rdimon.specs):

      set(CMAKE_SYSTEM_NAME       Generic)
set(CMAKE_SYSTEM_PROCESSOR  Cortex-A9)

# Common options
add_compile_options(
    -mcpu=cortex-a9
    -O0
    -g
)

set(CMAKE_EXE_LINKER_FLAGS "--specs=rdimon.specs")

set(CMAKE_C_COMPILER_FORCED TRUE)
set(CMAKE_CXX_COMPILER_FORCED TRUE)

find_program(CMAKE_C_COMPILER               $ENV{ARMGCC_DIR}/bin/arm-none-eabi-gcc.exe)
find_program(CMAKE_CXX_COMPILER             $ENV{ARMGCC_DIR}/bin/arm-none-eabi-g++.exe)
find_program(CMAKE_ASM_COMPILER             $ENV{ARMGCC_DIR}/bin/arm-none-eabi-gcc.exe)

find_program(CMAKE_OBJCOPY                  $ENV{ARMGCC_DIR}/bin/arm-none-eabi-objcopy)
find_program(CMAKE_OBJDUMP                  $ENV{ARMGCC_DIR}/bin/arm-none-eabi-objdump)
find_program(CMAKE_NM                       $ENV{ARMGCC_DIR}/bin/arm-none-eabi-nm)
find_program(CMAKE_LINKER                   $ENV{ARMGCC_DIR}/bin/arm-none-eabi-ld)

build-cmake.cmd:

      @set ARMGCC_DIR=D:\opt\arm\10\gcc-arm-10.3-2021.07-mingw-w64-i686-arm-none-eabi
@set CMAKE=D:\opt\cmake-3.23.1-windows-x86_64\bin\cmake
@set MAKE=D:\opt\stackoverflow\72199730\make.exe
@set QEMU_SYSTEM_ARM=D:\opt\qemu-7.0.0\qemu-system-arm

%CMAKE% -E rm -rf tmp
%CMAKE% -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=toolchain.cmake . -Btmp
%MAKE% -C tmp
%QEMU_SYSTEM_ARM%  -semihosting --semihosting-config enable=on,target=native -nographic -serial mon:stdio -machine xilinx-zynq-a9 -m 768M -cpu cortex-a9 -kernel tmp\hello.elf

Исполнение:

      D:\opt\stackoverflow\72199730>build-cmake.cmd

D:\opt\stackoverflow\72199730>D:\opt\cmake-3.23.1-windows-x86_64\bin\cmake -E rm -rf tmp

D:\opt\stackoverflow\72199730>D:\opt\cmake-3.23.1-windows-x86_64\bin\cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=toolchain.cmake . -Btmp
-- The C compiler identification is GNU 10.3.1
-- The CXX compiler identification is GNU 10.3.1
-- Configuring done
-- Generating done
-- Build files have been written to: D:/opt/stackoverflow/72199730/tmp

D:\opt\stackoverflow\72199730>D:\opt\stackoverflow\72199730\make.exe -C tmp
make: Entering directory 'D:/opt/stackoverflow/72199730/tmp'
make[1]: Entering directory 'D:/opt/stackoverflow/72199730/tmp'
make[2]: Entering directory 'D:/opt/stackoverflow/72199730/tmp'
make[2]: Leaving directory 'D:/opt/stackoverflow/72199730/tmp'
make[2]: Entering directory 'D:/opt/stackoverflow/72199730/tmp'
[ 50%] Building C object CMakeFiles/hello.elf.dir/hello.c.obj
[100%] Linking C executable hello.elf
make[2]: Leaving directory 'D:/opt/stackoverflow/72199730/tmp'
[100%] Built target hello.elf
make[1]: Leaving directory 'D:/opt/stackoverflow/72199730/tmp'
make: Leaving directory 'D:/opt/stackoverflow/72199730/tmp'

D:\opt\stackoverflow\72199730>D:\opt\qemu-7.0.0\qemu-system-arm  -semihosting --semihosting-config enable=on,target=native -nographic -serial mon:stdio -machine xilinx-zynq-a9 -m 768M -cpu cortex-a9 -kernel tmp\hello.elf
Hello, World!

Используемые версии:

      \opt\arm\10\gcc-arm-10.3-2021.07-mingw-w64-i686-arm-none-eabi\bin\arm-none-eabi-gcc --version
arm-none-eabi-gcc (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 10.3.1 20210621
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


\opt\cmake-3.23.1-windows-x86_64\bin\cmake.exe --version
cmake version 3.23.1

CMake suite maintained and supported by Kitware (kitware.com/cmake).

D:\opt\stackoverflow\72199730>\opt\qemu-7.0.0\qemu-system-arm.exe --version
QEMU emulator version 7.0.0 (v7.0.0-11902-g1d935f4a02-dirty)
Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers

make --version
GNU Make 4.2.1
Built for x86_64-w64-mingw32
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

wmic os get version
Version
10.0.19044
Источник
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