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gdb/arm: Ensure that stack pointers are in sync
For targets with secext, msp and psp can be seen as an alias for one of msp_s, msp_ns, psp_s or psp_ns. Without this patch, sp might be secure, but msp or psp is non-secure (this state can not happen in the hardware). Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
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@ -324,20 +324,6 @@ reconstruct_t_bit(struct gdbarch *gdbarch, CORE_ADDR lr, ULONGEST psr)
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return psr;
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}
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/* Initialize stack pointers, and flag the active one. */
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static inline void
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arm_cache_init_sp (int regnum, CORE_ADDR* member,
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struct arm_prologue_cache *cache,
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frame_info_ptr frame)
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{
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CORE_ADDR val = get_frame_register_unsigned (frame, regnum);
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if (val == cache->sp)
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cache->active_sp_regnum = regnum;
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*member = val;
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}
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/* Initialize CACHE fields for which zero is not adequate (CACHE is
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expected to have been ZALLOC'ed before calling this function). */
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@ -362,34 +348,82 @@ arm_cache_init (struct arm_prologue_cache *cache, frame_info_ptr frame)
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if (tdep->have_sec_ext)
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{
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CORE_ADDR msp_val = get_frame_register_unsigned (frame, tdep->m_profile_msp_regnum);
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CORE_ADDR psp_val = get_frame_register_unsigned (frame, tdep->m_profile_psp_regnum);
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const CORE_ADDR msp_val
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= get_frame_register_unsigned (frame, tdep->m_profile_msp_regnum);
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const CORE_ADDR psp_val
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= get_frame_register_unsigned (frame, tdep->m_profile_psp_regnum);
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arm_cache_init_sp (tdep->m_profile_msp_s_regnum, &cache->msp_s, cache, frame);
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arm_cache_init_sp (tdep->m_profile_psp_s_regnum, &cache->psp_s, cache, frame);
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arm_cache_init_sp (tdep->m_profile_msp_ns_regnum, &cache->msp_ns, cache, frame);
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arm_cache_init_sp (tdep->m_profile_psp_ns_regnum, &cache->psp_ns, cache, frame);
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cache->msp_s
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= get_frame_register_unsigned (frame, tdep->m_profile_msp_s_regnum);
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cache->msp_ns
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= get_frame_register_unsigned (frame, tdep->m_profile_msp_ns_regnum);
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cache->psp_s
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= get_frame_register_unsigned (frame, tdep->m_profile_psp_s_regnum);
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cache->psp_ns
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= get_frame_register_unsigned (frame, tdep->m_profile_psp_ns_regnum);
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/* Identify what msp is alias for (msp_s or msp_ns). */
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if (msp_val == cache->msp_s)
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cache->active_msp_regnum = tdep->m_profile_msp_s_regnum;
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else if (msp_val == cache->msp_ns)
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cache->active_msp_regnum = tdep->m_profile_msp_ns_regnum;
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else
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{
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warning (_("Invalid state, unable to determine msp alias, assuming "
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"msp_s."));
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cache->active_msp_regnum = tdep->m_profile_msp_s_regnum;
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}
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/* Identify what psp is alias for (psp_s or psp_ns). */
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if (psp_val == cache->psp_s)
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cache->active_psp_regnum = tdep->m_profile_psp_s_regnum;
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else if (psp_val == cache->psp_ns)
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cache->active_psp_regnum = tdep->m_profile_psp_ns_regnum;
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else
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{
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warning (_("Invalid state, unable to determine psp alias, assuming "
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"psp_s."));
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cache->active_psp_regnum = tdep->m_profile_psp_s_regnum;
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}
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/* Use MSP_S as default stack pointer. */
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if (cache->active_sp_regnum == ARM_SP_REGNUM)
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cache->active_sp_regnum = tdep->m_profile_msp_s_regnum;
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/* Identify what sp is alias for (msp_s, msp_ns, psp_s or psp_ns). */
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if (msp_val == cache->sp)
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cache->active_sp_regnum = cache->active_msp_regnum;
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else if (psp_val == cache->sp)
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cache->active_sp_regnum = cache->active_psp_regnum;
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else
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{
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warning (_("Invalid state, unable to determine sp alias, assuming "
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"msp."));
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cache->active_sp_regnum = cache->active_msp_regnum;
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}
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}
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else if (tdep->is_m)
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{
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arm_cache_init_sp (tdep->m_profile_msp_regnum, &cache->msp_s, cache, frame);
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arm_cache_init_sp (tdep->m_profile_psp_regnum, &cache->psp_s, cache, frame);
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cache->msp_s
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= get_frame_register_unsigned (frame, tdep->m_profile_msp_s_regnum);
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cache->psp_s
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= get_frame_register_unsigned (frame, tdep->m_profile_psp_s_regnum);
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/* Identify what sp is alias for (msp or psp). */
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if (cache->msp_s == cache->sp)
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cache->active_sp_regnum = tdep->m_profile_msp_regnum;
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else if (cache->psp_s == cache->sp)
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cache->active_sp_regnum = tdep->m_profile_psp_regnum;
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else
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{
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warning (_("Invalid state, unable to determine sp alias, assuming "
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"msp."));
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cache->active_sp_regnum = tdep->m_profile_msp_regnum;
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}
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}
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else
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arm_cache_init_sp (ARM_SP_REGNUM, &cache->msp_s, cache, frame);
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{
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cache->msp_s
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= get_frame_register_unsigned (frame, ARM_SP_REGNUM);
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cache->active_sp_regnum = ARM_SP_REGNUM;
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}
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}
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/* Return the requested stack pointer value (in REGNUM), taking into
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