Give an explicit error and abort when a load from VECBASE fails. Otherwise would likely jump to 0, which for v7-m holds the reset stack pointer address.
Signed-off-by: Michael Davidsaver <mdavidsa...@gmail.com> --- target-arm/helper.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/target-arm/helper.c b/target-arm/helper.c index 4178400..1d7ac43 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -5496,7 +5496,17 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs) /* Clear IT bits */ env->condexec_bits = 0; env->regs[14] = lr; - addr = ldl_phys(cs->as, env->v7m.vecbase + env->v7m.exception * 4); + { + MemTxResult result; + addr = address_space_ldl(cs->as, + env->v7m.vecbase + env->v7m.exception * 4, + MEMTXATTRS_UNSPECIFIED, &result); + if (result != MEMTX_OK) { + cpu_abort(cs, "Failed to read from exception vector table " + "entry %08x\n", + env->v7m.vecbase + env->v7m.exception * 4); + } + } env->regs[15] = addr & 0xfffffffe; env->thumb = addr & 1; if (!env->thumb) { -- 2.1.4