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[Bug 1923861] Re: Hardfault when accessing FPSCR register
From: |
Thomas Huth |
Subject: |
[Bug 1923861] Re: Hardfault when accessing FPSCR register |
Date: |
Fri, 30 Apr 2021 07:25:56 -0000 |
https://gitlab.com/qemu-project/qemu/-/commit/330ef14e6e749919c5c
https://gitlab.com/qemu-project/qemu/-/commit/1df0878cff267128393
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1923861
Title:
Hardfault when accessing FPSCR register
Status in QEMU:
Fix Released
Bug description:
QEMU release version: v6.0.0-rc2
command line:
qemu-system-arm -machine mps3-an547 -nographic -kernel <my_project>.elf
-semihosting -semihosting-config enable=on,target=native
host operating system: Linux ISCNR90TMR1S 5.4.72-microsoft-standard-
WSL2 #1 SMP Wed Oct 28 23:40:43 UTC 2020 x86_64 x86_64 x86_64
GNU/Linux
guest operating system: none (bare metal)
Observation:
I am simulating embedded firmware for a Cortex-M55 device, using MPS3-AN547
machine. In the startup code I am accessing the FPSCR core register:
unsigned int fpscr =__get_FPSCR();
fpscr = fpscr & (~FPU_FPDSCR_AHP_Msk);
__set_FPSCR(fpscr);
where the register access functions __get_FPSCR() and
__set_FPSCR(fpscr) are taken from CMSIS_5 at
./CMSIS/Core/include/cmsis_gcc.h
I observe hardfaults upon __get_FPSCR() and __set_FPSCR(fpscr). The
same startup code works fine on the Arm Corstone-300 FVP (MPS3-AN547).
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- [Bug 1923861] Re: Hardfault when accessing FPSCR register, (continued)
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/15
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/15
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, ml-0, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, ml-0, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, ml-0, 2021/04/16
- [Bug 1923861] Re: Hardfault when accessing FPSCR register, Peter Maydell, 2021/04/19
- [Bug 1923861] Re: Hardfault when accessing FPSCR register,
Thomas Huth <=