/* Target dependent code for CRIS, for GDB, the GNU debugger.
- Copyright (C) 2001-2013 Free Software Foundation, Inc.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
Contributed by Axis Communications AB.
Written by Hendrik Ruijter, Stefan Andersson, and Orjan Friberg.
#include "target.h"
#include "value.h"
#include "opcode/cris.h"
+#include "osabi.h"
#include "arch-utils.h"
#include "regcache.h"
-#include "gdb_assert.h"
#include "objfiles.h"
#include "solib.h" /* Support for shared libraries. */
#include "solib-svr4.h"
-#include "gdb_string.h"
#include "dis-asm.h"
+#include "cris-tdep.h"
+
enum cris_num_regs
{
/* There are no floating point registers. Used in gdbserver low-linux.c. */
/* Whether to make use of Dwarf-2 CFI (default on). */
static int usr_cmd_cris_dwarf2_cfi = 1;
-/* CRIS architecture specific information. */
-struct gdbarch_tdep
-{
- unsigned int cris_version;
- const char *cris_mode;
- int cris_dwarf2_cfi;
-};
-
/* Sigtramp identification code copied from i386-linux-tdep.c. */
#define SIGTRAMP_INSN0 0x9c5f /* movu.w 0xXX, $r9 */
int i;
if ((*this_cache))
- return (*this_cache);
+ return (struct cris_unwind_cache *) (*this_cache);
info = FRAME_OBSTACK_ZALLOC (struct cris_unwind_cache);
(*this_cache) = info;
int delay_slot_pc_active;
int xflag_found;
int disable_interrupt;
- int byte_order;
+ enum bfd_endian byte_order;
} inst_env_type;
/* Machine-dependencies in CRIS for opcodes. */
{
int len;
struct stack_item *prev;
- void *data;
+ gdb_byte *data;
};
static struct stack_item *
push_stack_item (struct stack_item *prev, const gdb_byte *contents, int len)
{
- struct stack_item *si;
- si = xmalloc (sizeof (struct stack_item));
- si->data = xmalloc (len);
+ struct stack_item *si = XNEW (struct stack_item);
+ si->data = (gdb_byte *) xmalloc (len);
si->len = len;
si->prev = prev;
memcpy (si->data, contents, len);
struct cris_unwind_cache *info;
if ((*this_prologue_cache))
- return (*this_prologue_cache);
+ return (struct cris_unwind_cache *) (*this_prologue_cache);
info = FRAME_OBSTACK_ZALLOC (struct cris_unwind_cache);
(*this_prologue_cache) = info;
int struct_return, CORE_ADDR struct_addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int stack_offset;
int argreg;
int argnum;
- /* The function's arguments and memory allocated by gdb for the arguments to
- point at reside in separate areas on the stack.
- Both frame pointers grow toward higher addresses. */
- CORE_ADDR fp_arg;
- CORE_ADDR fp_mem;
-
struct stack_item *si = NULL;
/* Push the return address. */
/* Now load as many as possible of the first arguments into registers,
and push the rest onto the stack. */
argreg = ARG1_REGNUM;
- stack_offset = 0;
for (argnum = 0; argnum < nargs; argnum++)
{
unsigned short insn_next;
int regno;
- /* Is there a push fp? */
- int have_fp;
-
/* Number of byte on stack used for local variables and movem. */
int val;
return sp;
}
-/* Use the program counter to determine the contents and size of a breakpoint
- instruction. It returns a pointer to a string of bytes that encode a
- breakpoint instruction, stores the length of the string to *lenptr, and
- adjusts pcptr (if necessary) to point to the actual memory location where
- the breakpoint should be inserted. */
+/* Implement the breakpoint_kind_from_pc gdbarch method. */
+
+static int
+cris_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
+{
+ return 2;
+}
+
+/* Implement the sw_breakpoint_from_kind gdbarch method. */
-static const unsigned char *
-cris_breakpoint_from_pc (struct gdbarch *gdbarch,
- CORE_ADDR *pcptr, int *lenptr)
+static const gdb_byte *
+cris_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
static unsigned char break8_insn[] = {0x38, 0xe9};
static unsigned char break15_insn[] = {0x3f, 0xe9};
- *lenptr = 2;
+
+ *size = kind;
if (tdep->cris_mode == cris_mode_guru)
return break15_insn;
static int
cris_register_size (struct gdbarch *gdbarch, int regno)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
int spec_regno;
if (reg >= 0 && reg < ARRAY_SIZE (cris_dwarf_regmap))
regnum = cris_dwarf_regmap[reg];
- if (regnum == -1)
- warning (_("Unmapped DWARF Register #%d encountered."), reg);
-
return regnum;
}
actually an internal error. */
static int
-find_step_target (struct frame_info *frame, inst_env_type *inst_env)
+find_step_target (struct regcache *regcache, inst_env_type *inst_env)
{
int i;
int offset;
unsigned short insn;
- struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* Create a local register image and set the initial state. */
for (i = 0; i < NUM_GENREGS; i++)
{
inst_env->reg[i] =
- (unsigned long) get_frame_register_unsigned (frame, i);
+ (unsigned long) regcache_raw_get_unsigned (regcache, i);
}
offset = NUM_GENREGS;
for (i = 0; i < NUM_SPECREGS; i++)
{
inst_env->preg[i] =
- (unsigned long) get_frame_register_unsigned (frame, offset + i);
+ (unsigned long) regcache_raw_get_unsigned (regcache, offset + i);
}
inst_env->branch_found = 0;
inst_env->slot_needed = 0;
digs through the opcodes in order to find all possible targets.
Either one ordinary target or two targets for branches may be found. */
-static int
-cris_software_single_step (struct frame_info *frame)
+static VEC (CORE_ADDR) *
+cris_software_single_step (struct regcache *regcache)
{
- struct gdbarch *gdbarch = get_frame_arch (frame);
- struct address_space *aspace = get_frame_address_space (frame);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
inst_env_type inst_env;
+ VEC (CORE_ADDR) *next_pcs = NULL;
/* Analyse the present instruction environment and insert
breakpoints. */
- int status = find_step_target (frame, &inst_env);
+ int status = find_step_target (regcache, &inst_env);
if (status == -1)
{
/* Could not find a target. Things are likely to go downhill
and possibly another one for a branch, jump, etc. */
CORE_ADDR next_pc
= (CORE_ADDR) inst_env.reg[gdbarch_pc_regnum (gdbarch)];
- insert_single_step_breakpoint (gdbarch, aspace, next_pc);
+
+ VEC_safe_push (CORE_ADDR, next_pcs, next_pc);
if (inst_env.branch_found
&& (CORE_ADDR) inst_env.branch_break_address != next_pc)
{
CORE_ADDR branch_target_address
= (CORE_ADDR) inst_env.branch_break_address;
- insert_single_step_breakpoint (gdbarch,
- aspace, branch_target_address);
+
+ VEC_safe_push (CORE_ADDR, next_pcs, branch_target_address);
}
}
- return 1;
+ return next_pcs;
}
/* Calculates the prefix value for quick offset addressing mode. */
cris_delayed_get_disassembler (bfd_vma addr, struct disassemble_info *info)
{
int (*print_insn) (bfd_vma addr, struct disassemble_info *info);
- /* FIXME: cagney/2003-08-27: It should be possible to select a CRIS
- disassembler, even when there is no BFD. Does something like
- "gdb; target remote; disassmeble *0x123" work? */
- gdb_assert (exec_bfd != NULL);
+
print_insn = cris_get_disassembler (exec_bfd);
gdb_assert (print_insn != NULL);
return print_insn (addr, info);
}
-/*
Copied from <asm/elf.h>. */
-typedef unsigned long elf_greg_t;
+/*
Originally from <asm/elf.h>. */
+typedef unsigned char cris_elf_greg_t[4];
/* Same as user_regs_struct struct in <asm/user.h>. */
#define CRISV10_ELF_NGREG 35
-typedef elf_greg_t elf_gregset_t[CRISV10_ELF_NGREG];
+typedef cris_elf_greg_t cris_elf_gregset_t[CRISV10_ELF_NGREG];
#define CRISV32_ELF_NGREG 32
-typedef elf_greg_t crisv32_elf_gregset_t[CRISV32_ELF_NGREG];
+typedef cris_elf_greg_t crisv32_elf_gregset_t[CRISV32_ELF_NGREG];
-/* Unpack an elf_gregset_t into GDB's register cache. */
+/* Unpack a cris_elf_gregset_t into GDB's register cache. */
static void
-cris_supply_gregset (struct regcache *regcache, elf_gregset_t *gregsetp)
+cris_supply_gregset (struct regcache *regcache, cris_elf_gregset_t *gregsetp)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
- elf_greg_t *regp = *gregsetp;
- static char zerobuf[4] = {0};
+ cris_elf_greg_t *regp = *gregsetp;
/* The kernel dumps all 32 registers as unsigned longs, but supply_register
knows about the actual size of each register so that's no problem. */
char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR reg_addr)
{
- elf_gregset_t gregset;
+ cris_elf_gregset_t gregset;
switch (which)
{
case 0:
- if (core_reg_size != sizeof (elf_gregset_t)
+ if (core_reg_size != sizeof (cris_elf_gregset_t)
&& core_reg_size != sizeof (crisv32_elf_gregset_t))
{
warning (_("wrong size gregset struct in core file"));
void
_initialize_cris_tdep (void)
{
- static struct cmd_list_element *cris_set_cmdlist;
- static struct cmd_list_element *cris_show_cmdlist;
-
- struct cmd_list_element *c;
-
gdbarch_register (bfd_arch_cris, cris_gdbarch_init, cris_dump_tdep);
/* CRIS-specific user-commands. */
}
/* No matching architecture was found. Create a new one. */
- tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
+ tdep = XNEW (struct gdbarch_tdep);
+ info.byte_order = BFD_ENDIAN_LITTLE;
gdbarch = gdbarch_alloc (&info, tdep);
tdep->cris_version = usr_cmd_cris_version;
tdep->cris_mode = usr_cmd_cris_mode;
tdep->cris_dwarf2_cfi = usr_cmd_cris_dwarf2_cfi;
- /* INIT shall ensure that the INFO.BYTE_ORDER is non-zero. */
- switch (info.byte_order)
- {
- case BFD_ENDIAN_LITTLE:
- /* Ok. */
- break;
-
- case BFD_ENDIAN_BIG:
- internal_error (__FILE__, __LINE__,
- _("cris_gdbarch_init: big endian byte order in info"));
- break;
-
- default:
- internal_error (__FILE__, __LINE__,
- _("cris_gdbarch_init: unknown byte order in info"));
- }
-
set_gdbarch_return_value (gdbarch, cris_return_value);
-
set_gdbarch_sp_regnum (gdbarch, 14);
/* Length of ordinary registers used in push_word and a few other
case 8:
case 9:
/* Old versions; not supported. */
- internal_error (__FILE__, __LINE__,
- _("cris_gdbarch_init: unsupported CRIS version"));
- break;
+ return 0;
case 10:
case 11:
break;
default:
- internal_error (__FILE__, __LINE__,
- _("cris_gdbarch_init: unknown CRIS version"));
+ /* Unknown version. */
+ return 0;
}
/* Dummy frame functions (shared between CRISv10 and CRISv32 since they
/* The stack grows downward. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_from_pc (gdbarch, cris_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch, cris_breakpoint_kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch, cris_sw_breakpoint_from_kind);
set_gdbarch_unwind_pc (gdbarch, cris_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, cris_unwind_sp);
frame_unwind_append_unwinder (gdbarch, &cris_frame_unwind);
frame_base_set_default (gdbarch, &cris_frame_base);
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
-
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
/* FIXME: cagney/2003-08-27: It should be possible to select a CRIS
disassembler, even when there is no BFD. Does something like
"gdb; target remote; disassmeble *0x123" work? */
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