context_gcc.S文件编译问题

发布于 2015-07-23 11:50:04 浏览：6881 订阅该版

报错信息如下：
```
Building file: ../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S
Invoking: Cross ARM GNU Assembler
arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Og -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -fno-move-loop-invariants -Wall -Wextra  -g3 -x assembler-with-cpp -DDEBUG -DUSE_FULL_ASSERT -DSTM32F407xx -DUSE_HAL_DRIVER -DHSE_VALUE=8000000 -DSTM32F40XX -I"D:ProjectCaoProjectCodeTrafficLightTerminal_gccRTThread_OSPortinglibcpuarmcommon" -I"D:ProjectCaoProjectCodeTrafficLightTerminal_gccRTThread_OSPortinglibcpuarmcortex-m4" -I"D:ProjectCaoProjectCodeTrafficLightTerminal_gccRTThread_OSPortinglibcpuarmstartup" -MMD -MP -MF"RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.d" -MT"RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.o" -c -o "RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.o" "../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S"
../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S: Assembler messages:
../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S:113: Error: thumb conditional instruction should be in IT block -- `vstmdbeq r1!,{d8-d15}'
../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S:122: Error: thumb conditional instruction should be in IT block -- `moveq r4,#0x01'
../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S:143: Error: thumb conditional instruction should be in IT block -- `vldmiane r1!,{d8-d15}'
../RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.S:155: Error: thumb conditional instruction should be in IT block -- `bicne lr,lr,#0x10'
make: *** [RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.o] Error 1
RTThread_OS/Porting/libcpu/arm/cortex-m4/subdir.mk:25: recipe for target 'RTThread_OS/Porting/libcpu/arm/cortex-m4/context_gcc.o' failed
```

错误点如：
```c
#if defined (__VFP_FP__) && !defined(__SOFTFP__)
    TST     lr, #0x10           /* if(!EXC_RETURN[4]) */
    VSTMDBEQ r1!, {d8 - d15}    /* push FPU register s16~s31 */
#endif
```
貌似是`VSTMDBEQ` 有问题

我的硬件是STM32F407
我的环境是Windows，使用编译器为gcc-arm-none-eabi-4_9，IDE使用的是Eclipse

因为项目需要，需使用STemWin，而M4内核的STemWin都是要求有使用FPU的，现在就出现了这样的问题，怎么解决？

论坛里面有如下信息：
(1).选自 [移植 RT-Thread 到 STM32F4XX (支持FPU)](https://club.rt-thread.org/ask/question/010e96e457d98bfb.html)
Cortex-M4F笔记：
1. IAR 和 GCC不支持 VSTMFD，修改为直接使用DB, IA.
(2).有人问了同样的问题，选自 [编译遇到的新问题](https://club.rt-thread.org/ask/question/336ecba509943a1c.html)
但是貌似没有准确的回答，后面也没下文