diff options
Diffstat (limited to 'results/scraper/launchpad-without-comments/1838475')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1838475 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1838475 b/results/scraper/launchpad-without-comments/1838475 new file mode 100644 index 000000000..1ad743d54 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1838475 @@ -0,0 +1,18 @@ +qemu-system-arm exits when cortex-m4 floating point used and irq occurs + +qemu-system-arm exits with + +"...Secure UsageFault with CFSR.NOCP because NSACR.CP10 prevents stacking FP regs +...taking pending nonsecure exception 3 +Taking exception 7 [Breakpoint] +qemu: fatal: Lockup: can't escalate 3 to HardFault (current priority -1)" + +when emulating Cortex-m4, executing at least 1 floating point instruction, and then an irq (e.g. sys tick) occurring. + +CPACR.CP10 and CPACR.CP11 are set to 0x3 respectively prior to executing the fp instructions. + +NOTE: NSACR does not appear to be a cortex m4 register. + +Attached is a simplified elf to repro the issue. + +The qemu command line is: "qemu-system-arm --gdb tcp::1234 -cpu cortex-m4 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -kernel QemuExitWhenUsingFPAndIRQOccurs.elf -d int" \ No newline at end of file |