/* Common target dependent code for GDB on ARM systems.
- Copyright (C) 1988-1989, 1991-1993, 1995-1996, 1998-2012 Free
- Software Foundation, Inc.
+ Copyright (C) 1988-2013 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#include "defs.h"
+
#include <ctype.h> /* XXX for isupper (). */
-#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "gdbcmd.h"
#include "vec.h"
#include "record.h"
+#include "record-full.h"
#include "features/arm-with-m.c"
#include "features/arm-with-m-fpa-layout.c"
int
arm_pc_is_thumb (struct gdbarch *gdbarch, CORE_ADDR memaddr)
{
- struct minimal_symbol *sym;
+ struct bound_minimal_symbol sym;
char type;
struct displaced_step_closure* dsc
= get_displaced_step_closure_by_addr(memaddr);
/* Thumb functions have a "special" bit set in minimal symbols. */
sym = lookup_minimal_symbol_by_pc (memaddr);
- if (sym)
- return (MSYMBOL_IS_SPECIAL (sym));
+ if (sym.minsym)
+ return (MSYMBOL_IS_SPECIAL (sym.minsym));
/* If the user wants to override the fallback mode, let them. */
if (strcmp (arm_fallback_mode_string, "arm") == 0)
static CORE_ADDR
arm_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR val)
{
+ /* On M-profile devices, do not strip the low bit from EXC_RETURN
+ (the magic exception return address). */
+ if (gdbarch_tdep (gdbarch)->is_m
+ && (val & 0xfffffff0) == 0xfffffff0)
+ return val;
+
if (arm_apcs_32)
return UNMAKE_THUMB_ADDR (val);
else
return (val & 0x03fffffc);
}
-/* When reading symbols, we need to zap the low bit of the address,
- which may be set to 1 for Thumb functions. */
-static CORE_ADDR
-arm_smash_text_address (struct gdbarch *gdbarch, CORE_ADDR val)
-{
- return val & ~1;
-}
-
/* Return 1 if PC is the start of a compiler helper function which
can be safely ignored during prologue skipping. IS_THUMB is true
if the function is known to be a Thumb function due to the way it
skip_prologue_function (struct gdbarch *gdbarch, CORE_ADDR pc, int is_thumb)
{
enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
- struct minimal_symbol *msym;
+ struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol_by_pc (pc);
- if (msym != NULL
- && SYMBOL_VALUE_ADDRESS (msym) == pc
- && SYMBOL_LINKAGE_NAME (msym) != NULL)
+ if (msym.minsym != NULL
+ && SYMBOL_VALUE_ADDRESS (msym.minsym) == pc
+ && SYMBOL_LINKAGE_NAME (msym.minsym) != NULL)
{
- const char *name = SYMBOL_LINKAGE_NAME (msym);
+ const char *name = SYMBOL_LINKAGE_NAME (msym.minsym);
/* The GNU linker's Thumb call stub to foo is named
__foo_from_thumb. */
#define sbits(obj,st,fn) \
((long) (bits(obj,st,fn) | ((long) bit(obj,fn) * ~ submask (fn - st))))
#define BranchDest(addr,instr) \
- ((CORE_ADDR) (((long) (addr)) + 8 + (sbits (instr, 0, 23) << 2)))
+ ((CORE_ADDR) (((unsigned long) (addr)) + 8 + (sbits (instr, 0, 23) << 2)))
/* Extract the immediate from instruction movw/movt of encoding T. INSN1 is
the first 16-bit of instruction, and INSN2 is the second 16-bit of
{
enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
unsigned int basereg;
- struct minimal_symbol *stack_chk_guard;
+ struct bound_minimal_symbol stack_chk_guard;
int offset;
int is_thumb = arm_pc_is_thumb (gdbarch, pc);
CORE_ADDR addr;
/* If name of symbol doesn't start with '__stack_chk_guard', this
instruction sequence is not for stack protector. If symbol is
removed, we conservatively think this sequence is for stack protector. */
- if (stack_chk_guard
- && strncmp (SYMBOL_LINKAGE_NAME (stack_chk_guard), "__stack_chk_guard",
+ if (stack_chk_guard.minsym
+ && strncmp (SYMBOL_LINKAGE_NAME (stack_chk_guard.minsym),
+ "__stack_chk_guard",
strlen ("__stack_chk_guard")) != 0)
return pc;
if (post_prologue_pc
&& (s == NULL
|| s->producer == NULL
- || strncmp (s->producer, "GNU ", sizeof ("GNU ") - 1) == 0))
+ || strncmp (s->producer, "GNU ", sizeof ("GNU ") - 1) == 0
+ || strncmp (s->producer, "clang ", sizeof ("clang ") - 1) == 0))
return post_prologue_pc;
if (post_prologue_pc != 0)
void **this_prologue_cache)
{
CORE_ADDR addr_in_block;
- char dummy[4];
+ gdb_byte dummy[4];
addr_in_block = get_frame_address_in_block (this_frame);
- if (in_plt_section (addr_in_block, NULL)
+ if (in_plt_section (addr_in_block)
/* We also use the stub winder if the target memory is unreadable
to avoid having the prologue unwinder trying to read it. */
|| target_read_memory (get_frame_pc (this_frame), dummy, 4) != 0)
arm_stub_unwind_sniffer
};
+/* Put here the code to store, into CACHE->saved_regs, the addresses
+ of the saved registers of frame described by THIS_FRAME. CACHE is
+ returned. */
+
+static struct arm_prologue_cache *
+arm_m_exception_cache (struct frame_info *this_frame)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct arm_prologue_cache *cache;
+ CORE_ADDR unwound_sp;
+ LONGEST xpsr;
+
+ cache = FRAME_OBSTACK_ZALLOC (struct arm_prologue_cache);
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
+
+ unwound_sp = get_frame_register_unsigned (this_frame,
+ ARM_SP_REGNUM);
+
+ /* The hardware saves eight 32-bit words, comprising xPSR,
+ ReturnAddress, LR (R14), R12, R3, R2, R1, R0. See details in
+ "B1.5.6 Exception entry behavior" in
+ "ARMv7-M Architecture Reference Manual". */
+ cache->saved_regs[0].addr = unwound_sp;
+ cache->saved_regs[1].addr = unwound_sp + 4;
+ cache->saved_regs[2].addr = unwound_sp + 8;
+ cache->saved_regs[3].addr = unwound_sp + 12;
+ cache->saved_regs[12].addr = unwound_sp + 16;
+ cache->saved_regs[14].addr = unwound_sp + 20;
+ cache->saved_regs[15].addr = unwound_sp + 24;
+ cache->saved_regs[ARM_PS_REGNUM].addr = unwound_sp + 28;
+
+ /* If bit 9 of the saved xPSR is set, then there is a four-byte
+ aligner between the top of the 32-byte stack frame and the
+ previous context's stack pointer. */
+ cache->prev_sp = unwound_sp + 32;
+ if (safe_read_memory_integer (unwound_sp + 28, 4, byte_order, &xpsr)
+ && (xpsr & (1 << 9)) != 0)
+ cache->prev_sp += 4;
+
+ return cache;
+}
+
+/* Implementation of function hook 'this_id' in
+ 'struct frame_uwnind'. */
+
+static void
+arm_m_exception_this_id (struct frame_info *this_frame,
+ void **this_cache,
+ struct frame_id *this_id)
+{
+ struct arm_prologue_cache *cache;
+
+ if (*this_cache == NULL)
+ *this_cache = arm_m_exception_cache (this_frame);
+ cache = *this_cache;
+
+ /* Our frame ID for a stub frame is the current SP and LR. */
+ *this_id = frame_id_build (cache->prev_sp,
+ get_frame_pc (this_frame));
+}
+
+/* Implementation of function hook 'prev_register' in
+ 'struct frame_uwnind'. */
+
+static struct value *
+arm_m_exception_prev_register (struct frame_info *this_frame,
+ void **this_cache,
+ int prev_regnum)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct arm_prologue_cache *cache;
+
+ if (*this_cache == NULL)
+ *this_cache = arm_m_exception_cache (this_frame);
+ cache = *this_cache;
+
+ /* 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 trad_frame_get_prev_register (this_frame, cache->saved_regs,
+ prev_regnum);
+}
+
+/* Implementation of function hook 'sniffer' in
+ 'struct frame_uwnind'. */
+
+static int
+arm_m_exception_unwind_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_prologue_cache)
+{
+ CORE_ADDR this_pc = get_frame_pc (this_frame);
+
+ /* No need to check is_m; this sniffer is only registered for
+ M-profile architectures. */
+
+ /* Exception frames return to one of these magic PCs. Other values
+ are not defined as of v7-M. See details in "B1.5.8 Exception
+ return behavior" in "ARMv7-M Architecture Reference Manual". */
+ if (this_pc == 0xfffffff1 || this_pc == 0xfffffff9
+ || this_pc == 0xfffffffd)
+ return 1;
+
+ return 0;
+}
+
+/* Frame unwinder for M-profile exceptions. */
+
+struct frame_unwind arm_m_exception_unwind =
+{
+ SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
+ arm_m_exception_this_id,
+ arm_m_exception_prev_register,
+ NULL,
+ arm_m_exception_unwind_sniffer
+};
+
static CORE_ADDR
arm_normal_frame_base (struct frame_info *this_frame, void **this_cache)
{
val + i * unit_length);
else
{
- sprintf (name_buf, "%c%d", reg_char, reg_scaled + i);
+ xsnprintf (name_buf, sizeof (name_buf), "%c%d",
+ reg_char, reg_scaled + i);
regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
regcache_cooked_write (regcache, regnum,
{
char name_buf[4];
- sprintf (name_buf, "s%d", reg - 64);
+ xsnprintf (name_buf, sizeof (name_buf), "s%d", reg - 64);
return user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
}
{
char name_buf[4];
- sprintf (name_buf, "d%d", reg - 256);
+ xsnprintf (name_buf, sizeof (name_buf), "d%d", reg - 256);
return user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
}
else if ((inst1 & 0xff00) == 0x4700) /* bx REG, blx REG */
{
if (bits (inst1, 3, 6) == 0x0f)
- nextpc = pc_val;
+ nextpc = UNMAKE_THUMB_ADDR (pc_val);
else
nextpc = get_frame_register_unsigned (frame, bits (inst1, 3, 6));
}
unsigned int i, len, offset;
enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
int size = dsc->is_thumb? 2 : 4;
- const unsigned char *bkp_insn;
+ const gdb_byte *bkp_insn;
offset = 0;
/* Poke modified instruction(s). */
#define THUMB_LE_BREAKPOINT {0xbe,0xbe}
#define THUMB_BE_BREAKPOINT {0xbe,0xbe}
-static const char arm_default_arm_le_breakpoint[] = ARM_LE_BREAKPOINT;
-static const char arm_default_arm_be_breakpoint[] = ARM_BE_BREAKPOINT;
-static const char arm_default_thumb_le_breakpoint[] = THUMB_LE_BREAKPOINT;
-static const char arm_default_thumb_be_breakpoint[] = THUMB_BE_BREAKPOINT;
+static const gdb_byte arm_default_arm_le_breakpoint[] = ARM_LE_BREAKPOINT;
+static const gdb_byte arm_default_arm_be_breakpoint[] = ARM_BE_BREAKPOINT;
+static const gdb_byte arm_default_thumb_le_breakpoint[] = THUMB_LE_BREAKPOINT;
+static const gdb_byte arm_default_thumb_be_breakpoint[] = THUMB_BE_BREAKPOINT;
/* Determine the type and size of breakpoint to insert at PCPTR. Uses
the program counter value to determine whether a 16-bit or 32-bit
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
- char buf[MAX_REGISTER_SIZE];
+ gdb_byte buf[MAX_REGISTER_SIZE];
switch (gdbarch_tdep (gdbarch)->fp_model)
{
char name_buf[4];
int regnum;
- sprintf (name_buf, "%c%d", reg_char, i);
+ xsnprintf (name_buf, sizeof (name_buf), "%c%d", reg_char, i);
regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
if (writebuf)
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR jb_addr;
- char buf[INT_REGISTER_SIZE];
+ gdb_byte buf[INT_REGISTER_SIZE];
jb_addr = get_frame_register_unsigned (frame, ARM_A1_REGNUM);
struct gdbarch_info info;
/* If the current architecture is not ARM, we have nothing to do. */
- if (gdbarch_bfd_arch_info (target_gdbarch)->arch != bfd_arch_arm)
+ if (gdbarch_bfd_arch_info (target_gdbarch ())->arch != bfd_arch_arm)
return;
/* Update the architecture. */
show_fp_model (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch ());
if (arm_fp_model == ARM_FLOAT_AUTO
- && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_arm)
+ && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_arm)
fprintf_filtered (file, _("\
The current ARM floating point model is \"auto\" (currently \"%s\").\n"),
fp_model_strings[tdep->fp_model]);
arm_show_abi (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch ());
if (arm_abi_global == ARM_ABI_AUTO
- && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_arm)
+ && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_arm)
fprintf_filtered (file, _("\
The current ARM ABI is \"auto\" (currently \"%s\").\n"),
arm_abi_strings[tdep->arm_abi]);
arm_show_force_mode (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (target_gdbarch ());
fprintf_filtered (file,
_("The current execution mode assumed "
int offset, double_regnum;
enum register_status status;
- sprintf (name_buf, "d%d", regnum << 1);
+ xsnprintf (name_buf, sizeof (name_buf), "d%d", regnum << 1);
double_regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
else
offset = (regnum & 1) ? 4 : 0;
- sprintf (name_buf, "d%d", regnum >> 1);
+ xsnprintf (name_buf, sizeof (name_buf), "d%d", regnum >> 1);
double_regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
char name_buf[4];
int offset, double_regnum;
- sprintf (name_buf, "d%d", regnum << 1);
+ xsnprintf (name_buf, sizeof (name_buf), "d%d", regnum << 1);
double_regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
else
offset = (regnum & 1) ? 4 : 0;
- sprintf (name_buf, "d%d", regnum >> 1);
+ xsnprintf (name_buf, sizeof (name_buf), "d%d", regnum >> 1);
double_regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
strlen (name_buf));
frame_base_set_default (gdbarch, &arm_normal_base);
/* Address manipulation. */
- set_gdbarch_smash_text_address (gdbarch, arm_smash_text_address);
set_gdbarch_addr_bits_remove (gdbarch, arm_addr_bits_remove);
/* Advance PC across function entry code. */
dwarf2_frame_set_init_reg (gdbarch, arm_dwarf2_frame_init_reg);
/* Add some default predicates. */
+ if (is_m)
+ frame_unwind_append_unwinder (gdbarch, &arm_m_exception_unwind);
frame_unwind_append_unwinder (gdbarch, &arm_stub_unwind);
dwarf2_append_unwinders (gdbarch);
frame_unwind_append_unwinder (gdbarch, &arm_exidx_unwind);
if (0 == ret)
{
/* Record registers. */
- record_arch_list_add_reg (arm_record.regcache, ARM_PC_REGNUM);
+ record_full_arch_list_add_reg (arm_record.regcache, ARM_PC_REGNUM);
if (arm_record.arm_regs)
{
for (no_of_rec = 0; no_of_rec < arm_record.reg_rec_count; no_of_rec++)
{
- if (record_arch_list_add_reg (arm_record.regcache ,
- arm_record.arm_regs[no_of_rec]))
+ if (record_full_arch_list_add_reg
+ (arm_record.regcache , arm_record.arm_regs[no_of_rec]))
ret = -1;
}
}
{
for (no_of_rec = 0; no_of_rec < arm_record.mem_rec_count; no_of_rec++)
{
- if (record_arch_list_add_mem
+ if (record_full_arch_list_add_mem
((CORE_ADDR)arm_record.arm_mems[no_of_rec].addr,
- arm_record.arm_mems[no_of_rec].len))
+ arm_record.arm_mems[no_of_rec].len))
ret = -1;
}
}
- if (record_arch_list_add_end ())
+ if (record_full_arch_list_add_end ())
ret = -1;
}
projects / deliverable / binutils-gdb.git / blobdiff