#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"
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 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
{
|| (sparc_floating_p (type) && TYPE_LENGTH (type) == 16));
}
+static int
+sparc32_dwarf2_struct_return_p (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_unwind_address_in_block (next_frame);
+ struct symbol *sym = find_pc_function (pc);
+
+ if (sym)
+ return sparc32_struct_return_from_sym (sym);
+ return 0;
+}
+
+static void
+sparc32_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+ struct dwarf2_frame_state_reg *reg,
+ struct frame_info *next_frame)
+{
+ 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
/* The SPARC Architecture doesn't have hardware single-step support,
and most operating systems don't implement it either, so we provide
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);
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);
projects / deliverable / binutils-gdb.git / blobdiff