/* Target-dependent code for SPARC.
- Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2006, 2007 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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "arch-utils.h"
#include "dis-asm.h"
+#include "dwarf2-frame.h"
#include "floatformat.h"
#include "frame.h"
#include "frame-base.h"
/* The SPARC Floating-Point Quad-Precision format is similar to
big-endian IA-64 Quad-recision format. */
-#define floatformat_sparc_quad floatformat_ia64_quad_big
+#define floatformats_sparc_quad floatformats_ia64_quad
/* The stack pointer is offset from the stack frame by a BIAS of 2047
(0x7ff) for 64-bit code. BIAS is likely to be defined on SPARC
int i;
/* If we can't read the instruction at PC, return zero. */
- if (target_read_memory (pc, buf, sizeof (buf)))
+ if (read_memory_nobpt (pc, buf, sizeof (buf)))
return 0;
insn = 0;
gdb_byte buf[8];
int len;
- len = target_read_partial (ops, TARGET_OBJECT_WCOOKIE, NULL, buf, 0, 8);
+ len = target_read (ops, TARGET_OBJECT_WCOOKIE, NULL, buf, 0, 8);
if (len == -1)
return 0;
/* Return the contents if register REGNUM as an address. */
-static CORE_ADDR
+CORE_ADDR
sparc_address_from_register (int regnum)
{
ULONGEST addr;
return NULL;
}
+\f
+
+/* Type for %psr. */
+struct type *sparc_psr_type;
+
+/* Type for %fsr. */
+struct type *sparc_fsr_type;
+
+/* Construct types for ISA-specific registers. */
+
+static void
+sparc_init_types (void)
+{
+ struct type *type;
+
+ type = init_flags_type ("builtin_type_sparc_psr", 4);
+ append_flags_type_flag (type, 5, "ET");
+ append_flags_type_flag (type, 6, "PS");
+ append_flags_type_flag (type, 7, "S");
+ append_flags_type_flag (type, 12, "EF");
+ append_flags_type_flag (type, 13, "EC");
+ sparc_psr_type = type;
+
+ type = init_flags_type ("builtin_type_sparc_fsr", 4);
+ append_flags_type_flag (type, 0, "NXA");
+ append_flags_type_flag (type, 1, "DZA");
+ append_flags_type_flag (type, 2, "UFA");
+ append_flags_type_flag (type, 3, "OFA");
+ append_flags_type_flag (type, 4, "NVA");
+ append_flags_type_flag (type, 5, "NXC");
+ append_flags_type_flag (type, 6, "DZC");
+ append_flags_type_flag (type, 7, "UFC");
+ append_flags_type_flag (type, 8, "OFC");
+ append_flags_type_flag (type, 9, "NVC");
+ append_flags_type_flag (type, 22, "NS");
+ append_flags_type_flag (type, 23, "NXM");
+ append_flags_type_flag (type, 24, "DZM");
+ append_flags_type_flag (type, 25, "UFM");
+ append_flags_type_flag (type, 26, "OFM");
+ append_flags_type_flag (type, 27, "NVM");
+ sparc_fsr_type = type;
+}
/* Return the GDB type object for the "standard" data type of data in
register REGNUM. */
if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM)
return builtin_type_void_func_ptr;
+ if (regnum == SPARC32_PSR_REGNUM)
+ return sparc_psr_type;
+
+ if (regnum == SPARC32_FSR_REGNUM)
+ return sparc_fsr_type;
+
return builtin_type_int32;
}
static const gdb_byte *
sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len)
{
- static gdb_byte break_insn[] = { 0x91, 0xd0, 0x20, 0x01 };
+ static const gdb_byte break_insn[] = { 0x91, 0xd0, 0x20, 0x01 };
*len = sizeof (break_insn);
return break_insn;
return cache;
}
+static int
+sparc32_struct_return_from_sym (struct symbol *sym)
+{
+ struct type *type = check_typedef (SYMBOL_TYPE (sym));
+ enum type_code code = TYPE_CODE (type);
+
+ if (code == TYPE_CODE_FUNC || code == TYPE_CODE_METHOD)
+ {
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+ if (sparc_structure_or_union_p (type)
+ || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16))
+ return 1;
+ }
+
+ return 0;
+}
+
struct sparc_frame_cache *
sparc32_frame_cache (struct frame_info *next_frame, void **this_cache)
{
sym = find_pc_function (cache->pc);
if (sym)
{
- struct type *type = check_typedef (SYMBOL_TYPE (sym));
- enum type_code code = TYPE_CODE (type);
-
- if (code == TYPE_CODE_FUNC || code == TYPE_CODE_METHOD)
- {
- type = check_typedef (TYPE_TARGET_TYPE (type));
- if (sparc_structure_or_union_p (type)
- || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16))
- cache->struct_return_p = 1;
- }
+ cache->struct_return_p = sparc32_struct_return_from_sym (sym);
}
else
{
sparc32_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct sparc_frame_cache *cache =
sparc32_frame_cache (next_frame, this_cache);
struct regcache *regcache, gdb_byte *readbuf,
const gdb_byte *writebuf)
{
+ /* The psABI says that "...every stack frame reserves the word at
+ %fp+64. If a function returns a structure, union, or
+ quad-precision value, this word should hold the address of the
+ object into which the return value should be copied." This
+ guarantees that we can always find the return value, not just
+ before the function returns. */
+
if (sparc_structure_or_union_p (type)
|| (sparc_floating_p (type) && TYPE_LENGTH (type) == 16))
- return RETURN_VALUE_STRUCT_CONVENTION;
+ {
+ if (readbuf)
+ {
+ ULONGEST sp;
+ CORE_ADDR addr;
+
+ regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
+ addr = read_memory_unsigned_integer (sp + 64, 4);
+ read_memory (addr, readbuf, TYPE_LENGTH (type));
+ }
+
+ return RETURN_VALUE_ABI_PRESERVES_ADDRESS;
+ }
if (readbuf)
sparc32_extract_return_value (type, regcache, readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
-#if 0
-/* NOTE: cagney/2004-01-17: For the moment disable this method. The
- architecture and CORE-gdb will need new code (and a replacement for
- DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS) before this can be made to
- work robustly. Here is a possible function signature: */
-/* NOTE: cagney/2004-01-17: So far only the 32-bit SPARC ABI has been
- identifed as having a way to robustly recover the address of a
- struct-convention return-value (after the function has returned).
- For all other ABIs so far examined, the calling convention makes no
- guarenteed that the register containing the return-value will be
- preserved and hence that the return-value's address can be
- recovered. */
-/* Extract from REGCACHE, which contains the (raw) register state, the
- address in which a function should return its structure value, as a
- CORE_ADDR. */
+static int
+sparc32_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
+{
+ return (sparc_structure_or_union_p (type)
+ || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16));
+}
-static CORE_ADDR
-sparc32_extract_struct_value_address (struct regcache *regcache)
+static int
+sparc32_dwarf2_struct_return_p (struct frame_info *next_frame)
{
- ULONGEST sp;
+ CORE_ADDR pc = frame_unwind_address_in_block (next_frame);
+ struct symbol *sym = find_pc_function (pc);
- regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
- return read_memory_unsigned_integer (sp + 64, 4);
+ if (sym)
+ return sparc32_struct_return_from_sym (sym);
+ return 0;
}
-#endif
-static int
-sparc32_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
+static void
+sparc32_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+ struct dwarf2_frame_state_reg *reg,
+ struct frame_info *next_frame)
{
- return (sparc_structure_or_union_p (type)
- || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16));
+ int off;
+
+ switch (regnum)
+ {
+ case SPARC_G0_REGNUM:
+ /* Since %g0 is always zero, there is no point in saving it, and
+ people will be inclined omit it from the CFI. Make sure we
+ don't warn about that. */
+ reg->how = DWARF2_FRAME_REG_SAME_VALUE;
+ break;
+ case SPARC_SP_REGNUM:
+ reg->how = DWARF2_FRAME_REG_CFA;
+ break;
+ case SPARC32_PC_REGNUM:
+ case SPARC32_NPC_REGNUM:
+ reg->how = DWARF2_FRAME_REG_RA_OFFSET;
+ off = 8;
+ if (sparc32_dwarf2_struct_return_p (next_frame))
+ off += 4;
+ if (regnum == SPARC32_NPC_REGNUM)
+ off += 4;
+ reg->loc.offset = off;
+ break;
+ }
}
\f
software single-step mechanism. */
static CORE_ADDR
-sparc_analyze_control_transfer (CORE_ADDR pc, CORE_ADDR *npc)
+sparc_analyze_control_transfer (struct gdbarch *arch,
+ CORE_ADDR pc, CORE_ADDR *npc)
{
unsigned long insn = sparc_fetch_instruction (pc);
int conditional_p = X_COND (insn) & 0x7;
branch_p = 1;
offset = 4 * X_DISP19 (insn);
}
+ else if (X_OP (insn) == 2 && X_OP3 (insn) == 0x3a)
+ {
+ /* Trap instruction (TRAP). */
+ return gdbarch_tdep (arch)->step_trap (insn);
+ }
/* FIXME: Handle DONE and RETRY instructions. */
- /* FIXME: Handle the Trap instruction. */
-
if (branch_p)
{
if (conditional_p)
return 0;
}
+static CORE_ADDR
+sparc_step_trap (unsigned long insn)
+{
+ return 0;
+}
+
void
sparc_software_single_step (enum target_signal sig, int insert_breakpoints_p)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- static CORE_ADDR npc, nnpc;
- static gdb_byte npc_save[4], nnpc_save[4];
+ struct gdbarch *arch = current_gdbarch;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
+ CORE_ADDR npc, nnpc;
if (insert_breakpoints_p)
{
orig_npc = npc = sparc_address_from_register (tdep->npc_regnum);
/* Analyze the instruction at PC. */
- nnpc = sparc_analyze_control_transfer (pc, &npc);
+ nnpc = sparc_analyze_control_transfer (arch, pc, &npc);
if (npc != 0)
- target_insert_breakpoint (npc, npc_save);
+ insert_single_step_breakpoint (npc);
+
if (nnpc != 0)
- target_insert_breakpoint (nnpc, nnpc_save);
+ insert_single_step_breakpoint (nnpc);
/* Assert that we have set at least one breakpoint, and that
they're not set at the same spot - unless we're going
gdb_assert (nnpc != npc || orig_npc == 0);
}
else
- {
- if (npc != 0)
- target_remove_breakpoint (npc, npc_save);
- if (nnpc != 0)
- target_remove_breakpoint (nnpc, nnpc_save);
- }
+ remove_single_step_breakpoints ();
}
static void
tdep->fpregset = NULL;
tdep->sizeof_fpregset = 0;
tdep->plt_entry_size = 0;
+ tdep->step_trap = sparc_step_trap;
set_gdbarch_long_double_bit (gdbarch, 128);
- set_gdbarch_long_double_format (gdbarch, &floatformat_sparc_quad);
+ set_gdbarch_long_double_format (gdbarch, floatformats_sparc_quad);
set_gdbarch_num_regs (gdbarch, SPARC32_NUM_REGS);
set_gdbarch_register_name (gdbarch, sparc32_register_name);
frame_base_set_default (gdbarch, &sparc32_frame_base);
+ /* Hook in the DWARF CFI frame unwinder. */
+ dwarf2_frame_set_init_reg (gdbarch, sparc32_dwarf2_frame_init_reg);
+ /* FIXME: kettenis/20050423: Don't enable the unwinder until the
+ StackGhost issues have been resolved. */
+
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
_initialize_sparc_tdep (void)
{
register_gdbarch_init (bfd_arch_sparc, sparc32_gdbarch_init);
+
+ /* Initialize the SPARC-specific register types. */
+ sparc_init_types();
}
projects / deliverable / binutils-gdb.git / blobdiff