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* [binutils-gdb] gdb/arm: Add support for multiple stack pointers on Cortex-M
@ 2022-04-27 14:51 Christophe Lyon
0 siblings, 0 replies; only message in thread
From: Christophe Lyon @ 2022-04-27 14:51 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ae7e2f45aa4798be449f282bbf75ad41e73f055e
commit ae7e2f45aa4798be449f282bbf75ad41e73f055e
Author: Christophe Lyon <christophe.lyon@arm.com>
Date: Fri Apr 1 10:22:16 2022 +0100
gdb/arm: Add support for multiple stack pointers on Cortex-M
Armv8-M architecture with Security extension features four stack pointers
to handle Secure and Non-secure modes.
This patch adds support to switch between them as needed during
unwinding, and replaces all updates of cache->prev_sp with calls to
arm_cache_set_prev_sp.
Signed-off-by: Torbjörn Svensson <torbjorn.svensson@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@foss.st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@arm.com>
Diff:
---
gdb/arm-tdep.c | 261 +++++++++++++++++++++++++++++++++++++---
gdb/arm-tdep.h | 11 +-
gdb/features/arm/arm-secext.c | 17 +++
gdb/features/arm/arm-secext.xml | 15 +++
4 files changed, 284 insertions(+), 20 deletions(-)
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index f393a3e4ad6..7a6c1e49125 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -276,7 +276,18 @@ struct arm_prologue_cache
/* The stack pointer at the time this frame was created; i.e. the
caller's stack pointer when this function was called. It is used
to identify this frame. */
- CORE_ADDR prev_sp;
+ CORE_ADDR sp;
+
+ /* Additional stack pointers used by M-profile with Security extension. */
+ /* Use msp_s / psp_s to hold the values of msp / psp when there is
+ no Security extension. */
+ CORE_ADDR msp_s;
+ CORE_ADDR msp_ns;
+ CORE_ADDR psp_s;
+ CORE_ADDR psp_ns;
+
+ /* Active stack pointer. */
+ int active_sp_regnum;
/* The frame base for this frame is just prev_sp - frame size.
FRAMESIZE is the distance from the frame pointer to the
@@ -296,12 +307,28 @@ struct arm_prologue_cache
arm_prologue_cache() = default;
};
+/* Initialize stack pointers, and flag the active one. */
+
+static inline void
+arm_cache_init_sp (int regnum, CORE_ADDR* member,
+ struct arm_prologue_cache *cache,
+ struct frame_info *frame)
+{
+ CORE_ADDR val = get_frame_register_unsigned (frame, regnum);
+ if (val == cache->sp)
+ cache->active_sp_regnum = regnum;
+
+ *member = val;
+}
+
/* Initialize CACHE fields for which zero is not adequate (CACHE is
expected to have been ZALLOC'ed before calling this function). */
static void
arm_cache_init (struct arm_prologue_cache *cache, struct gdbarch *gdbarch)
{
+ cache->active_sp_regnum = ARM_SP_REGNUM;
+
cache->saved_regs = trad_frame_alloc_saved_regs (gdbarch);
}
@@ -311,8 +338,109 @@ static void
arm_cache_init (struct arm_prologue_cache *cache, struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
+ arm_gdbarch_tdep *tdep = (arm_gdbarch_tdep *) gdbarch_tdep (gdbarch);
arm_cache_init (cache, gdbarch);
+
+ if (tdep->have_sec_ext)
+ {
+ arm_cache_init_sp (tdep->m_profile_msp_s_regnum, &cache->msp_s, cache, frame);
+ arm_cache_init_sp (tdep->m_profile_psp_s_regnum, &cache->psp_s, cache, frame);
+ arm_cache_init_sp (tdep->m_profile_msp_ns_regnum, &cache->msp_ns, cache, frame);
+ arm_cache_init_sp (tdep->m_profile_psp_ns_regnum, &cache->psp_ns, cache, frame);
+
+ /* Use MSP_S as default stack pointer. */
+ if (cache->active_sp_regnum == ARM_SP_REGNUM)
+ cache->active_sp_regnum = tdep->m_profile_msp_s_regnum;
+ }
+ else if (tdep->is_m)
+ {
+ arm_cache_init_sp (tdep->m_profile_msp_regnum, &cache->msp_s, cache, frame);
+ arm_cache_init_sp (tdep->m_profile_psp_regnum, &cache->psp_s, cache, frame);
+ }
+ else
+ arm_cache_init_sp (ARM_SP_REGNUM, &cache->msp_s, cache, frame);
+}
+
+/* Return the requested stack pointer value (in REGNUM), taking into
+ account whether we have a Security extension or an M-profile
+ CPU. */
+
+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)
+ return cache->msp_s;
+ if (regnum == tdep->m_profile_msp_ns_regnum)
+ return cache->msp_ns;
+ if (regnum == tdep->m_profile_psp_s_regnum)
+ return cache->psp_s;
+ if (regnum == tdep->m_profile_psp_ns_regnum)
+ return cache->psp_ns;
+ }
+ else if (tdep->is_m)
+ {
+ if (regnum == tdep->m_profile_msp_regnum)
+ return cache->msp_s;
+ if (regnum == tdep->m_profile_psp_regnum)
+ return cache->psp_s;
+ }
+
+ gdb_assert_not_reached ("Invalid SP selection");
+}
+
+/* Return the previous stack address, depending on which SP register
+ is active. */
+
+static CORE_ADDR
+arm_cache_get_prev_sp_value (struct arm_prologue_cache *cache, arm_gdbarch_tdep *tdep)
+{
+ CORE_ADDR val = arm_cache_get_sp_register (cache, tdep, cache->active_sp_regnum);
+ return val;
+}
+
+/* Set the active stack pointer to VAL. */
+
+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)
+ cache->msp_s = val;
+ else if (cache->active_sp_regnum == tdep->m_profile_msp_ns_regnum)
+ cache->msp_ns = val;
+ else if (cache->active_sp_regnum == tdep->m_profile_psp_s_regnum)
+ cache->psp_s = val;
+ else if (cache->active_sp_regnum == tdep->m_profile_psp_ns_regnum)
+ cache->psp_ns = val;
+
+ return;
+ }
+ else if (tdep->is_m)
+ {
+ if (cache->active_sp_regnum == tdep->m_profile_msp_regnum)
+ cache->msp_s = val;
+ else if (cache->active_sp_regnum == tdep->m_profile_psp_regnum)
+ cache->psp_s = val;
+
+ return;
+ }
+
+ gdb_assert_not_reached ("Invalid SP selection");
}
namespace {
@@ -2010,14 +2138,17 @@ arm_make_prologue_cache (struct frame_info *this_frame)
if (unwound_fp == 0)
return cache;
- cache->prev_sp = unwound_fp + cache->framesize;
+ arm_gdbarch_tdep *tdep =
+ (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+
+ arm_cache_set_active_sp_value (cache, tdep, unwound_fp + cache->framesize);
/* Calculate actual addresses of saved registers using offsets
determined by arm_scan_prologue. */
for (reg = 0; reg < gdbarch_num_regs (get_frame_arch (this_frame)); reg++)
if (cache->saved_regs[reg].is_addr ())
cache->saved_regs[reg].set_addr (cache->saved_regs[reg].addr ()
- + cache->prev_sp);
+ + arm_cache_get_prev_sp_value (cache, tdep));
return cache;
}
@@ -2043,7 +2174,7 @@ arm_prologue_unwind_stop_reason (struct frame_info *this_frame,
return UNWIND_OUTERMOST;
/* If we've hit a wall, stop. */
- if (cache->prev_sp == 0)
+ if (arm_cache_get_prev_sp_value (cache, tdep) == 0)
return UNWIND_OUTERMOST;
return UNWIND_NO_REASON;
@@ -2065,6 +2196,9 @@ arm_prologue_this_id (struct frame_info *this_frame,
*this_cache = arm_make_prologue_cache (this_frame);
cache = (struct arm_prologue_cache *) *this_cache;
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+
/* Use function start address as part of the frame ID. If we cannot
identify the start address (due to missing symbol information),
fall back to just using the current PC. */
@@ -2073,7 +2207,7 @@ arm_prologue_this_id (struct frame_info *this_frame,
if (!func)
func = pc;
- id = frame_id_build (cache->prev_sp, func);
+ id = frame_id_build (arm_cache_get_prev_sp_value (cache, tdep), func);
*this_id = id;
}
@@ -2114,7 +2248,8 @@ arm_prologue_prev_register (struct frame_info *this_frame,
identified by the next frame's stack pointer at the time of the call.
The value was already reconstructed into PREV_SP. */
if (prev_regnum == ARM_SP_REGNUM)
- return frame_unwind_got_constant (this_frame, prev_regnum, cache->prev_sp);
+ return frame_unwind_got_constant (this_frame, prev_regnum,
+ arm_cache_get_prev_sp_value (cache, tdep));
/* The CPSR may have been changed by the call instruction and by the
called function. The only bit we can reconstruct is the T bit,
@@ -2752,7 +2887,9 @@ arm_exidx_fill_cache (struct frame_info *this_frame, gdb_byte *entry)
= vsp - get_frame_register_unsigned (this_frame, cache->framereg);
/* We already got the previous SP. */
- cache->prev_sp = vsp;
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ arm_cache_set_active_sp_value (cache, tdep, vsp);
return cache;
}
@@ -2875,14 +3012,18 @@ arm_make_epilogue_frame_cache (struct frame_info *this_frame)
arm_scan_prologue (this_frame, cache);
/* Since we are in epilogue, the SP has been restored. */
- cache->prev_sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM);
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ arm_cache_set_active_sp_value (cache, tdep,
+ get_frame_register_unsigned (this_frame,
+ ARM_SP_REGNUM));
/* Calculate actual addresses of saved registers using offsets
determined by arm_scan_prologue. */
for (reg = 0; reg < gdbarch_num_regs (get_frame_arch (this_frame)); reg++)
if (cache->saved_regs[reg].is_addr ())
cache->saved_regs[reg].set_addr (cache->saved_regs[reg].addr ()
- + cache->prev_sp);
+ + arm_cache_get_prev_sp_value (cache, tdep));
return cache;
}
@@ -2910,7 +3051,9 @@ arm_epilogue_frame_this_id (struct frame_info *this_frame,
if (func == 0)
func = pc;
- (*this_id) = frame_id_build (cache->prev_sp, pc);
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ *this_id = frame_id_build (arm_cache_get_prev_sp_value (cache, tdep), pc);
}
/* Implementation of function hook 'prev_register' in
@@ -3032,7 +3175,11 @@ arm_make_stub_cache (struct frame_info *this_frame)
cache = FRAME_OBSTACK_ZALLOC (struct arm_prologue_cache);
arm_cache_init (cache, this_frame);
- cache->prev_sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM);
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ arm_cache_set_active_sp_value (cache, tdep,
+ get_frame_register_unsigned (this_frame,
+ ARM_SP_REGNUM));
return cache;
}
@@ -3050,7 +3197,10 @@ arm_stub_this_id (struct frame_info *this_frame,
*this_cache = arm_make_stub_cache (this_frame);
cache = (struct arm_prologue_cache *) *this_cache;
- *this_id = frame_id_build (cache->prev_sp, get_frame_pc (this_frame));
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ *this_id = frame_id_build (arm_cache_get_prev_sp_value (cache, tdep),
+ get_frame_pc (this_frame));
}
static int
@@ -3171,12 +3321,12 @@ arm_m_exception_cache (struct frame_info *this_frame)
cache->saved_regs[ARM_FPSCR_REGNUM].set_addr (unwound_sp + 0x60);
/* Offset 0x64 is reserved. */
- cache->prev_sp = unwound_sp + 0x68;
+ arm_cache_set_active_sp_value (cache, tdep, unwound_sp + 0x68);
}
else
{
/* Standard stack frame type used. */
- cache->prev_sp = unwound_sp + 0x20;
+ arm_cache_set_active_sp_value (cache, tdep, unwound_sp + 0x20);
}
/* Check EXC_RETURN bit S if Secure or Non-secure stack used. */
@@ -3198,7 +3348,8 @@ arm_m_exception_cache (struct frame_info *this_frame)
previous context's stack pointer. */
if (safe_read_memory_integer (unwound_sp + 28, 4, byte_order, &xpsr)
&& (xpsr & (1 << 9)) != 0)
- cache->prev_sp += 4;
+ arm_cache_set_active_sp_value (cache, tdep,
+ arm_cache_get_prev_sp_value (cache, tdep) + 4);
return cache;
}
@@ -3218,7 +3369,9 @@ arm_m_exception_this_id (struct frame_info *this_frame,
cache = (struct arm_prologue_cache *) *this_cache;
/* Our frame ID for a stub frame is the current SP and LR. */
- *this_id = frame_id_build (cache->prev_sp,
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ *this_id = frame_id_build (arm_cache_get_prev_sp_value (cache, tdep),
get_frame_pc (this_frame));
}
@@ -3237,9 +3390,11 @@ arm_m_exception_prev_register (struct frame_info *this_frame,
cache = (struct arm_prologue_cache *) *this_cache;
/* The value was already reconstructed into PREV_SP. */
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
if (prev_regnum == ARM_SP_REGNUM)
return frame_unwind_got_constant (this_frame, prev_regnum,
- cache->prev_sp);
+ arm_cache_get_prev_sp_value (cache, tdep));
return trad_frame_get_prev_register (this_frame, cache->saved_regs,
prev_regnum);
@@ -3284,7 +3439,9 @@ arm_normal_frame_base (struct frame_info *this_frame, void **this_cache)
*this_cache = arm_make_prologue_cache (this_frame);
cache = (struct arm_prologue_cache *) *this_cache;
- return cache->prev_sp - cache->framesize;
+ arm_gdbarch_tdep *tdep
+ = (arm_gdbarch_tdep *) gdbarch_tdep (get_frame_arch (this_frame));
+ return arm_cache_get_prev_sp_value (cache, tdep) - cache->framesize;
}
struct frame_base arm_normal_base = {
@@ -9249,6 +9406,7 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdesc_arch_data_up tdesc_data;
int i;
bool is_m = false;
+ bool have_sec_ext = false;
int vfp_register_count = 0;
bool have_s_pseudos = false, have_q_pseudos = false;
bool have_wmmx_registers = false;
@@ -9263,6 +9421,10 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
bool have_m_profile_msp = false;
int m_profile_msp_regnum = -1;
int m_profile_psp_regnum = -1;
+ int m_profile_msp_ns_regnum = -1;
+ int m_profile_psp_ns_regnum = -1;
+ int m_profile_msp_s_regnum = -1;
+ int m_profile_psp_s_regnum = -1;
/* If we have an object to base this architecture on, try to determine
its ABI. */
@@ -9679,6 +9841,56 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
keys. */
have_pacbti = true;
}
+
+ /* Do we have the Security extension? */
+ feature = tdesc_find_feature (tdesc,
+ "org.gnu.gdb.arm.secext");
+ if (feature != nullptr)
+ {
+ /* Secure/Non-secure stack pointers. */
+ /* MSP_NS */
+ valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
+ register_count, "msp_ns");
+ if (!valid_p)
+ {
+ warning (_("M-profile secext feature is missing required register msp_ns."));
+ return nullptr;
+ }
+ m_profile_msp_ns_regnum = register_count++;
+
+ /* PSP_NS */
+ valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
+ register_count, "psp_ns");
+ if (!valid_p)
+ {
+ warning (_("M-profile secext feature is missing required register psp_ns."));
+ return nullptr;
+ }
+ m_profile_psp_ns_regnum = register_count++;
+
+ /* MSP_S */
+ valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
+ register_count, "msp_s");
+ if (!valid_p)
+ {
+ warning (_("M-profile secext feature is missing required register msp_s."));
+ return nullptr;
+ }
+ m_profile_msp_s_regnum = register_count++;
+
+ /* PSP_S */
+ valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
+ register_count, "psp_s");
+ if (!valid_p)
+ {
+ warning (_("M-profile secext feature is missing required register psp_s."));
+ return nullptr;
+ }
+ m_profile_psp_s_regnum = register_count++;
+
+ have_sec_ext = true;
+ }
+
}
}
@@ -9725,6 +9937,7 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdep->arm_abi = arm_abi;
tdep->fp_model = fp_model;
tdep->is_m = is_m;
+ tdep->have_sec_ext = have_sec_ext;
tdep->have_fpa_registers = have_fpa_registers;
tdep->have_wmmx_registers = have_wmmx_registers;
gdb_assert (vfp_register_count == 0
@@ -9750,6 +9963,10 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
tdep->m_profile_msp_regnum = m_profile_msp_regnum;
tdep->m_profile_psp_regnum = m_profile_psp_regnum;
+ tdep->m_profile_msp_ns_regnum = m_profile_msp_ns_regnum;
+ tdep->m_profile_psp_ns_regnum = m_profile_psp_ns_regnum;
+ tdep->m_profile_msp_s_regnum = m_profile_msp_s_regnum;
+ tdep->m_profile_psp_s_regnum = m_profile_psp_s_regnum;
}
arm_register_g_packet_guesses (gdbarch);
@@ -10041,6 +10258,14 @@ arm_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file)
tdep->m_profile_msp_regnum);
gdb_printf (file, _("arm_dump_tdep: m_profile_psp_regnum = %i\n"),
tdep->m_profile_psp_regnum);
+ gdb_printf (file, _("arm_dump_tdep: m_profile_msp_ns_regnum = %i\n"),
+ tdep->m_profile_msp_ns_regnum);
+ gdb_printf (file, _("arm_dump_tdep: m_profile_psp_ns_regnum = %i\n"),
+ tdep->m_profile_psp_ns_regnum);
+ gdb_printf (file, _("arm_dump_tdep: m_profile_msp_s_regnum = %i\n"),
+ tdep->m_profile_msp_s_regnum);
+ gdb_printf (file, _("arm_dump_tdep: m_profile_psp_s_regnum = %i\n"),
+ tdep->m_profile_psp_s_regnum);
gdb_printf (file, _("arm_dump_tdep: Lowest pc = 0x%lx\n"),
(unsigned long) tdep->lowest_pc);
gdb_printf (file, _("arm_dump_tdep: have_pacbti = %s\n"),
diff --git a/gdb/arm-tdep.h b/gdb/arm-tdep.h
index 40170673fde..864406e98d2 100644
--- a/gdb/arm-tdep.h
+++ b/gdb/arm-tdep.h
@@ -125,10 +125,17 @@ struct arm_gdbarch_tdep : gdbarch_tdep
register. */
int pacbti_pseudo_count = 0; /* Total number of PACBTI pseudo registers. */
- int m_profile_msp_regnum = 0; /* M-profile MSP register number. */
- int m_profile_psp_regnum = 0; /* M-profile PSP register number. */
+ int m_profile_msp_regnum = ARM_SP_REGNUM; /* M-profile MSP register number. */
+ int m_profile_psp_regnum = ARM_SP_REGNUM; /* M-profile PSP register number. */
+
+ /* Secure and Non-secure stack pointers with security extension. */
+ int m_profile_msp_ns_regnum = ARM_SP_REGNUM; /* M-profile MSP_NS register number. */
+ int m_profile_psp_ns_regnum = ARM_SP_REGNUM; /* M-profile PSP_NS register number. */
+ int m_profile_msp_s_regnum = ARM_SP_REGNUM; /* M-profile MSP_S register number. */
+ int m_profile_psp_s_regnum = ARM_SP_REGNUM; /* M-profile PSP_S register number. */
bool is_m = false; /* Does the target follow the "M" profile. */
+ bool have_sec_ext = false; /* Do we have security extensions? */
CORE_ADDR lowest_pc = 0; /* Lowest address at which instructions
will appear. */
diff --git a/gdb/features/arm/arm-secext.c b/gdb/features/arm/arm-secext.c
new file mode 100644
index 00000000000..39ef4afb05f
--- /dev/null
+++ b/gdb/features/arm/arm-secext.c
@@ -0,0 +1,17 @@
+/* THIS FILE IS GENERATED. -*- buffer-read-only: t -*- vi:set ro:
+ Original: arm-secext.xml */
+
+#include "gdbsupport/tdesc.h"
+
+static int
+create_feature_arm_arm_m_system (struct target_desc *result, long regnum)
+{
+ struct tdesc_feature *feature;
+
+ feature = tdesc_create_feature (result, "org.gnu.gdb.arm.secext");
+ tdesc_create_reg (feature, "msp_ns", regnum++, 1, NULL, 32, "data_ptr");
+ tdesc_create_reg (feature, "psp_ns", regnum++, 1, NULL, 32, "data_ptr");
+ tdesc_create_reg (feature, "msp_s", regnum++, 1, NULL, 32, "data_ptr");
+ tdesc_create_reg (feature, "psp_s", regnum++, 1, NULL, 32, "data_ptr");
+ return regnum;
+}
diff --git a/gdb/features/arm/arm-secext.xml b/gdb/features/arm/arm-secext.xml
new file mode 100644
index 00000000000..52b2c20a982
--- /dev/null
+++ b/gdb/features/arm/arm-secext.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2022 Free Software Foundation, Inc.
+
+ Copying and distribution of this file, with or without modification,
+ are permitted in any medium without royalty provided the copyright
+ notice and this notice are preserved. -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.arm.secext">
+ <!-- We have 4 stack pointers with the security extension. -->
+ <reg name="msp_ns" bitsize="32" type="data_ptr"/>
+ <reg name="psp_ns" bitsize="32" type="data_ptr"/>
+ <reg name="msp_s" bitsize="32" type="data_ptr"/>
+ <reg name="psp_s" bitsize="32" type="data_ptr"/>
+</feature>
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2022-04-27 14:51 [binutils-gdb] gdb/arm: Add support for multiple stack pointers on Cortex-M Christophe Lyon
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