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gdb/arm: Make sp alias for one of the other stack pointers

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For Cortex-M targets, SP register is never detached from msp or
psp, it always has the same value as one of them.  Let GDB treat
ARM_SP_REGNUM as an alias similar to what is done in hardware.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
Signed-off-by: Yvan Roux <yvan.roux@foss.st.com>
This commit is contained in:
Yvan Roux 2022-06-15 16:07:22 +02:00
parent 0d12d61b9a
commit b9b66a3a57
1 changed files with 11 additions and 9 deletions
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20
gdb/arm-tdep.c
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@ -385,9 +385,6 @@ static CORE_ADDR
arm_cache_get_sp_register (struct arm_prologue_cache *cache,
arm_gdbarch_tdep *tdep, int regnum)
{
if (regnum == ARM_SP_REGNUM)
return cache->sp;
if (tdep->have_sec_ext)
{
if (regnum == tdep->m_profile_msp_s_regnum)
@ -402,6 +399,8 @@ arm_cache_get_sp_register (struct arm_prologue_cache *cache,
return arm_cache_get_sp_register (cache, tdep, cache->active_msp_regnum);
if (regnum == tdep->m_profile_psp_regnum)
return arm_cache_get_sp_register (cache, tdep, cache->active_psp_regnum);
if (regnum == ARM_SP_REGNUM)
return arm_cache_get_sp_register (cache, tdep, cache->active_sp_regnum);
}
else if (tdep->is_m)
{
@ -409,7 +408,11 @@ arm_cache_get_sp_register (struct arm_prologue_cache *cache,
return cache->msp_s;
if (regnum == tdep->m_profile_psp_regnum)
return cache->psp_s;
if (regnum == ARM_SP_REGNUM)
return arm_cache_get_sp_register (cache, tdep, cache->active_sp_regnum);
}
else if (regnum == ARM_SP_REGNUM)
return cache->sp;
gdb_assert_not_reached ("Invalid SP selection");
}
@ -430,12 +433,6 @@ static void
arm_cache_set_active_sp_value (struct arm_prologue_cache *cache,
arm_gdbarch_tdep *tdep, CORE_ADDR val)
{
if (cache->active_sp_regnum == ARM_SP_REGNUM)
{
cache->sp = val;
return;
}
if (tdep->have_sec_ext)
{
if (cache->active_sp_regnum == tdep->m_profile_msp_s_regnum)
@ -458,6 +455,11 @@ arm_cache_set_active_sp_value (struct arm_prologue_cache *cache,
return;
}
else if (cache->active_sp_regnum == ARM_SP_REGNUM)
{
cache->sp = val;
return;
}
gdb_assert_not_reached ("Invalid SP selection");
}