Segmentation Fault with dynarec and UT2004

[Mashintime]

Trying to get box86 running on a Raspberry Pi 4, updated 32 bit raspbian, no mods other than Kernel 5.4.50

I can run UT2004 with the tagged 0.1.0 version w/dynarec without issue.

Using the latest version I get a seg fault with dynarec, but works fine with dynarec disabled. I tried debugging it but it's beyond my capabilities (not familiar enough with c++ and/or gdb). If I can provide more info please let me know, and thanks for this great emulator.

Some gdb output is below:

`Start x86emu on Main
Run X86 (0x375868), EIP=0x804a970, Stack=0xb3f28008
... =>PltResolver: Addr=0x376870, Slot=704 Return=0x804a991: elf is ./ucc-bin
PltReolver: Apply Global R_386_JMP_SLOT @0x8e01730 with sym=__libc_start_main (0x804a53e -> 0x3d68c0 / (noelf))
return 0x00000003
30059|0x804a991: Calling __libc_start_main (0804ADA0, 00000003, B4727684...) =>Calling init(0x8049f78) from __libc_start_main
... =>PltResolver: Addr=0x376870, Slot=1208 Return=0x8049f96: elf is ./ucc-bin
PltReolver: Apply Global R_386_JMP_SLOT @0x8e0182c with sym=gmon_start (0x804a92e -> 0x38f578 / (noelf))
return 0x00000003
30059|0x8049f96: Calling gmon_start (00373AC0, 00000000, 0036DD60...) =>gmon_start called (dummy call)
return 0x00000003

Program received signal SIGSEGV, Segmentation fault.
dynarec000 (dyn=dyn@entry=0xbeffeed0, addr=134523480, addr@entry=134523475, ip=ip@entry=134523475, ninst=ninst@entry=22, ok=0xbeffee88, need_epilog=0xbeffee8c)
at /home/pi/box86/src/dynarec/dynarec_arm_00.c:2023
2023 } else if ((PK(i32+0)==0x8B) && (((PK(i32+1))&0xC7)==0x04) && (PK(i32+2)==0x24) && (PK(i32+3)==0xC3)) {

(gdb) print i32
$1 = -134523480

(gdb) bt
#0 dynarec000 (dyn=dyn@entry=0xbeffeed0, addr=134523480, addr@entry=134523475, ip=ip@entry=134523475, ninst=ninst@entry=22, ok=0xbeffee88, need_epilog=0xbeffee8c)
at /home/pi/box86/src/dynarec/dynarec_arm_00.c:2023
#1 0x00105c3c in arm_pass0 (dyn=0xbeffeed0, dyn@entry=0xbeffeec8, addr=134523475, addr@entry=134523392) at /home/pi/box86/src/dynarec/dynarec_arm_pass.c:64
#2 0x001055e0 in FillBlock (block=block@entry=0x3f98d8) at /home/pi/box86/src/dynarec/dynarec_arm.c:170
#3 0x001047dc in internalDBGetBlock (addr=addr@entry=134523392, create=create@entry=1, current=, emu=) at /home/pi/box86/src/dynarec/dynablock.c:462
#4 0x0010496c in DBGetBlock (emu=0x375868, addr=addr@entry=134523392, create=create@entry=1, current=0xbefff0c4, current@entry=0xbefff0bc) at /home/pi/box86/src/dynarec/dynablock.c:473
#5 0x0009c910 in UpdateLinkTable (emu=, table=0x3f76e8, addr=134523392) at /home/pi/box86/src/dynarec/dynarec.c:57
#6 0x00105b20 in arm_linker () at /home/pi/box86/src/dynarec/arm_linker.S:20`

[ptitSeb]

Ok, I have pushed something based on the backtrace. Can you check if it helps?

[Mashintime]

That seems to have fixed it, thanks again!