Iar arm r5 warning stopped at unknown breakpoint

IAR ARM R5 WARNING STOPPED AT UNKNOWN BREAKPOINT SOFTWARE
IAR ARM R5 WARNING STOPPED AT UNKNOWN BREAKPOINT CODE

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IAR ARM R5 WARNING STOPPED AT UNKNOWN BREAKPOINT SOFTWARE

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IAR ARM R5 WARNING STOPPED AT UNKNOWN BREAKPOINT CODE

Handler - e.g., set a breakpoint in the handler, queue a signal,Д«elow's the code I was using to test this. I don't get the bug if I instead PTRACE_CONTINUE into the signal #0 sigusr1_handler (sig=10) at si-handler.c:33 Note that even another PTRACE_SINGLESTEP does not fix it:Д®ventually, it gets 'fixed' by the rt_sigreturn syscall, when returning Sigusr1_handler (sig=10) at si-handler.c:32 Program received signal SIGTRAP, Trace/breakpoint trap.Д x0000000000400624 in sigusr1_handler (sig=0) at si-handler.c:31

Sigusr1_handler (sig=0) at si-handler.c:31 Now step into the handler - 'si' does PTRACE_SINGLESTEP+SIGUSR1:

(With mainline GDB, you can instead just do 'queue-signal SIGUSR1'.) Program received signal SIGUSR1, User defined signal 1. SIGUSR1 Yes Yes Yes User defined signal 1 Signal Stop Print Pass to program Description Let's queue a signal, so we can step into the handler: Temporary breakpoint 1, main () at si-handler.c:48 The problem is that $eflags.TF ends stuck/set. While writing a GDB test I noticed that when I have a signal pending/queued, and I single-step into signal handler, and then issue another step inside the handler, the following continues will result in spurious SIGTRAPS.

Iar arm r5 warning stopped at unknown breakpoint