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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
| commit | dee4dcba78baf712cab403d47d9db319ab7f95d6 (patch) | |
| tree | 418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/108/debug/2186 | |
| parent | 4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff) | |
| download | emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip | |
restructure results
Diffstat (limited to 'results/classifier/108/debug/2186')
| -rw-r--r-- | results/classifier/108/debug/2186 | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/results/classifier/108/debug/2186 b/results/classifier/108/debug/2186 deleted file mode 100644 index b5ac7d40..00000000 --- a/results/classifier/108/debug/2186 +++ /dev/null @@ -1,49 +0,0 @@ -debug: 0.947 -graphic: 0.763 -device: 0.739 -other: 0.725 -performance: 0.675 -PID: 0.627 -socket: 0.587 -permissions: 0.578 -semantic: 0.570 -vnc: 0.566 -network: 0.501 -boot: 0.358 -files: 0.203 -KVM: 0.081 - -riscv virt pflash0 writes not supported -Description of problem: -I am using GDB to debug some Firmware related stuff. At some point in the execution my BIOS/Firmware writes into some global variable (at 0x2000525C) inside the .bss section which is linked to be inside the memory mapped pflash0. But when I step forward with GDB to the exact location where the store instruction (sw) is executed, QEMU prints the following: -``` -pflash_write: Unimplemented flash cmd sequence (offset 000000000000525c, wcycle 0x0 cmd 0x0 value 0x1) -``` -According to the top of `hw/block/pflash_cfi01.c` Flash writes are supported. I was also under the impression that the flash is memory mapped, but maybe that is not true? I am probably missing something here so it would be nice if someone could point me in the right direction. I would also gladly contribute if there is something missing in the riscv virt target. - -I made a simple program to more easily reproduce this: -``` -.section .text -.global _start -_start: - lui a5, 0x20000 - li a4, 5 - sw a4, 24(a5) - -``` -results in QEMU error msg: -``` -pflash_write: Unimplemented flash cmd sequence (offset 0000000000000018, wcycle 0x0 cmd 0x0 value 0x5) -``` -Steps to reproduce: -1. compile above assembly program like this: -``` -riscv64-unknown-elf-gcc -nostdlib -O0 bios.S -riscv64-unknown-elf-objcopy -O binary a.out -truncate -s 33554432 a.out -``` -2. start QEMU like this: -``` -qemu-system-riscv64 -M virt -bios none -drive if=pflash,format=raw,unit=0,file=a.out -nographic -d unimp -``` -3. notice the error message printed by QEMU |