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Diffstat (limited to 'gitlab/issues/target_arm/host_missing/accel_missing/952.toml')
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diff --git a/gitlab/issues/target_arm/host_missing/accel_missing/952.toml b/gitlab/issues/target_arm/host_missing/accel_missing/952.toml deleted file mode 100644 index 6bf852531..000000000 --- a/gitlab/issues/target_arm/host_missing/accel_missing/952.toml +++ /dev/null @@ -1,109 +0,0 @@ -id = 952 -title = "qemu: uncaught target signal 5 (Trace/breakpoint trap)" -state = "closed" -created_at = "2022-03-31T09:08:00.588Z" -closed_at = "2023-03-14T14:56:06.221Z" -labels = ["linux-user", "target: arm", "workflow::Needs Info"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/952" -host-os = "n/a" -host-arch = "X86_64" -qemu-version = "qemu-arm version 6.2.0" -guest-os = "n/a" -guest-arch = "n/a" -description = """I'm getting core dumped when running the attached a.out_err binary in qemu, but when using Gdb to remote-debug the program, it exited normally. will appreciate if you can help look into this qemu issue. - -And I found that QEMU's 32-bit arm linux-user mode doesn't correctly turn guest BKPT insns into SIGTRAP signal. - -0xa602 <_start> movs r0, #22 - 0xa604 <_start+2> addw r1, pc, #186 ; 0xba -0xa608 <_start+6> bkpt 0x00ab - -$readelf -h hello - -ELF Header: - Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 - Class: ELF32 - Data: 2's complement, little endian - Version: 1 (current) - OS/ABI: UNIX - System V - ABI Version: 0 - Type: EXEC (Executable file) - Machine: ARM - Version: 0x1 - Entry point address: 0xa603 - Start of program headers: 52 (bytes into file) - Start of section headers: 144128 (bytes into file) - Flags: 0x5000200, Version5 EABI, soft-float ABI - Size of this header: 52 (bytes) - Size of program headers: 32 (bytes) - Number of program headers: 5 - Size of section headers: 40 (bytes) - Number of section headers: 16 - Section header string table index: 14 - -And I have check that the bug(https://bugs.launchpad.net/qemu/+bug/1873898) is fixed. - -But it's coredump. - -I found that bkpt instruction is not recognized, the bkpt is in 0x0000a608. - -host： -``` -$qemu-arm -g 12345 hello -``` -service: -``` -$gdb-multiarch hello -(gdb) target remote localhost:12345 -Remote debugging using localhost:12345 -0x0000a602 in _start () -(gdb) ni -0x0000a604 in _start () -(gdb) -0x0000a608 in _start () -(gdb) -0x0000a608 in _start () -``` -Another way to check: -``` -$gdb qemu-arm -(gdb) run hello -(gdb) bt -#0 0x00007ffff79474ba in __GI___sigsuspend (set=set@entry=0x7fffffffd9d8) at ../sysdeps/unix/sysv/linux/sigsuspend.c:26 -#1 0x000055555573bfff in dump_core_and_abort (target_sig=target_sig@entry=5) at ../linux-user/signal.c:772 -#2 0x000055555573c3c8 in handle_pending_signal (cpu_env=cpu_env@entry=0x555555da5940, sig=sig@entry=5, k=k@entry=0x555555e60e00) at ../linux-user/signal.c:1099 -#3 0x000055555573de8c in process_pending_signals (cpu_env=cpu_env@entry=0x555555da5940) at ../linux-user/signal.c:1175 -#4 0x0000555555622070 in cpu_loop (env=0x555555da5940) at ../linux-user/arm/cpu_loop.c:472 -#5 0x0000555555603cf4 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../linux-user/main.c:883 -(gdb) up -#1 0x000055555573bfff in dump_core_and_abort (target_sig=target_sig@entry=5) at ../linux-user/signal.c:772 -772 sigsuspend(&act.sa_mask); -(gdb) -#2 0x000055555573c3c8 in handle_pending_signal (cpu_env=cpu_env@entry=0x555555da5940, sig=sig@entry=5, k=k@entry=0x555555e60e00) at ../linux-user/signal.c:1099 -1099 dump_core_and_abort(sig); -(gdb) -#3 0x000055555573de8c in process_pending_signals (cpu_env=cpu_env@entry=0x555555da5940) at ../linux-user/signal.c:1175 -1175 handle_pending_signal(cpu_env, sig, &ts->sync_signal); -(gdb) -#4 0x0000555555622070 in cpu_loop (env=0x555555da5940) at ../linux-user/arm/cpu_loop.c:472 -472 process_pending_signals(env); -(gdb) l -467 default: -468 error: -469 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\\n", trapnr); -470 abort(); -471 } -472 process_pending_signals(env); -473 } -474 } -475 -476 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) -(gdb) p cpu_exec(cs) -$2 = 7 -``` -Here process_pending_signals(env) gives SIGTRAP?? - -Here is my binary: -[hello](/uploads/7225e1f1c5a61ace40f90d5d2401a758/hello)""" -reproduce = "n/a" -additional = "n/a" |