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Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1109')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/1109 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/1109 b/results/classifier/accel-gemma3:12b/kvm/1109 new file mode 100644 index 000000000..0b2e250a9 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1109 @@ -0,0 +1,43 @@ + +rpi3b frame buffer segfault +Description of problem: +I'm compiling a series of bare metal Raspberry Pi labs for the RPi 3B. One particular lab that I tried to compile and run, which makes use of the framebuffer, causes QEMU to segfault when trying to draw to the framebuffer. It looks like the value of `dst` passed into `draw_line_s16` is bogus and this causes the segfault. I'm not familiar enough with the code in QEMU to immediately know why `dst` is bogus. + +The lab I'm trying to run (the code compiled to `kernel8.img`) is here: https://github.com/bztsrc/raspi3-tutorial/tree/master/09_framebuffer + +A gdb stacktrace of the segfault is here: + +``` +Thread 1 "qemu-system-aar" received signal SIGSEGV, Segmentation fault. +0x00005555559580c0 in rgb_to_pixel32 (b=<optimized out>, g=<optimized out>, r=<optimized out>) + at /home/rhett/qemu/include/ui/pixel_ops.h:46 +46 return (r << 16) | (g << 8) | b; +(gdb) bt +#0 0x00005555559580c0 in rgb_to_pixel32 (b=<optimized out>, g=<optimized out>, r=<optimized out>) + at /home/rhett/qemu/include/ui/pixel_ops.h:46 +#1 draw_line_src16 + (opaque=opaque@entry=0x7fffe84d1c30, dst=dst@entry=0x7fffe8235010 <error: Cannot access memory at address 0x7fffe8235010>, src=0x7fff94300004 "", src@entry=0x7fff94300000 "", width=639, width@entry=640, deststep=deststep@entry=0) at ../hw/display/bcm2835_fb.c:131 +#2 0x0000555555953977 in framebuffer_update_display + (ds=<optimized out>, mem_section=<optimized out>, cols=640, rows=480, src_width=1280, dest_row_pitch=2560, dest_col_pitch=0, invalidate=1, fn=0x555555957fe0 <draw_line_src16>, opaque=0x7fffe84d1c30, first_row=0x7fffffffdb90, last_row=0x7fffffffdb94) + at ../hw/display/framebuffer.c:107 +#3 0x0000555555957eeb in fb_update_display (opaque=0x7fffe84d1c30) at ../hw/display/bcm2835_fb.c:203 +#4 0x00005555558a9146 in graphic_hw_update (con=0x555556b9bc00) at ../ui/console.c:230 +#5 0x00005555558a7fea in dpy_refresh (s=0x5555571c6aa0) at ../ui/console.c:1842 +#6 gui_update (opaque=opaque@entry=0x5555571c6aa0) at ../ui/console.c:165 +#7 0x0000555556068ecd in timerlist_run_timers (timer_list=0x555556b15350) at ../util/qemu-timer.c:576 +#8 timerlist_run_timers (timer_list=0x555556b15350) at ../util/qemu-timer.c:501 +#9 0x00005555560690c0 in qemu_clock_run_timers (type=<optimized out>) at ../util/qemu-timer.c:672 +#10 qemu_clock_run_all_timers () at ../util/qemu-timer.c:672 +#11 0x0000555556064bf6 in main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:607 +#12 0x0000555555b0a4f9 in qemu_main_loop () at ../softmmu/runstate.c:726 +#13 0x000055555589ec74 in qemu_main (envp=0x0, argv=<optimized out>, argc=<optimized out>) at ../softmmu/main.c:36 +#14 main (argc=<optimized out>, argv=<optimized out>) at ../softmmu/main.c:45 +``` +Steps to reproduce: +1. Clone the git repo for the labs I linked above +2. `cd raspi3-tutorial/09_framebuffer` +3. `make` +4. `make run` +5. Segfault + +I have found this on QEMU 5.2, QEMU 7.0, and the bleeding edge of the github repo |