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target/m68k: Fix address argument for EXCP_TRACE

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According to the M68040 Users Manual, section 8.4.3,
Six word stack frame (format 2), Trace (and others) is
supposed to record the next insn in PC and the address
of the trapping instruction in ADDRESS.

Create gen_raise_exception_format2 to record the trapping
pc in env->mmu.ar.  Update m68k_interrupt_all to pass the
value to do_stack_frame.  Update cpu_loop to handle EXCP_TRACE.

Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220602013401.303699-9-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2022-06-01 18:33:52 -07:00 • committed by Laurent Vivier
parent 710d747b2d
commit 8115fc9368
3 changed files with 36 additions and 18 deletions
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2
target/m68k/op_helper.c
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@ -397,13 +397,13 @@ static void m68k_interrupt_all(CPUM68KState *env, int is_hw)
case EXCP_ILLEGAL:
case EXCP_TRAPCC:
case EXCP_TRACE:
/* FIXME: addr is not only env->pc */
do_stack_frame(env, &sp, 2, oldsr, env->pc, env->pc);
break;
case EXCP_CHK:
case EXCP_DIV0:
case EXCP_TRACE:
do_stack_frame(env, &sp, 2, oldsr, env->mmu.ar, env->pc);
break;