/* Target-dependent code for SPARC.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
#define X_OP2(i) (((i) >> 22) & 0x7)
#define X_IMM22(i) ((i) & 0x3fffff)
#define X_OP3(i) (((i) >> 19) & 0x3f)
+#define X_RS1(i) (((i) >> 14) & 0x1f)
#define X_I(i) (((i) >> 13) & 1)
/* Sign extension macros. */
#define X_DISP22(i) ((X_IMM22 (i) ^ 0x200000) - 0x200000)
#define X_DISP19(i) ((((i) & 0x7ffff) ^ 0x40000) - 0x40000)
+#define X_SIMM13(i) ((((i) & 0x1fff) ^ 0x1000) - 0x1000)
/* Fetch the instruction at PC. Instructions are always big-endian
even if the processor operates in little-endian mode. */
static int
sparc_integral_or_pointer_p (const struct type *type)
{
+ int len = TYPE_LENGTH (type);
+
switch (TYPE_CODE (type))
{
case TYPE_CODE_INT:
case TYPE_CODE_CHAR:
case TYPE_CODE_ENUM:
case TYPE_CODE_RANGE:
- {
- /* We have byte, half-word, word and extended-word/doubleword
- integral types. The doubleword is an extension to the
- original 32-bit ABI by the SCD 2.4.x. */
- int len = TYPE_LENGTH (type);
- return (len == 1 || len == 2 || len == 4 || len == 8);
- }
- return 1;
+ /* We have byte, half-word, word and extended-word/doubleword
+ integral types. The doubleword is an extension to the
+ original 32-bit ABI by the SCD 2.4.x. */
+ return (len == 1 || len == 2 || len == 4 || len == 8);
case TYPE_CODE_PTR:
case TYPE_CODE_REF:
- {
- /* Allow either 32-bit or 64-bit pointers. */
- int len = TYPE_LENGTH (type);
- return (len == 4 || len == 8);
- }
- return 1;
+ /* Allow either 32-bit or 64-bit pointers. */
+ return (len == 4 || len == 8);
default:
break;
}
correct, and wasting a few bytes shouldn't be a problem. */
sp &= ~0x7;
- write_memory (sp, VALUE_CONTENTS (args[i]), len);
+ write_memory (sp, value_contents (args[i]), len);
args[i] = value_from_pointer (lookup_pointer_type (type), sp);
num_elements++;
}
for (i = 0; i < nargs; i++)
{
- char *valbuf = VALUE_CONTENTS (args[i]);
+ const bfd_byte *valbuf = value_contents (args[i]);
struct type *type = value_type (args[i]);
int len = TYPE_LENGTH (type);
return sal.end;
}
- return sparc_analyze_prologue (start_pc, 0xffffffffUL, &cache);
+ start_pc = sparc_analyze_prologue (start_pc, 0xffffffffUL, &cache);
+
+ /* The psABI says that "Although the first 6 words of arguments
+ reside in registers, the standard stack frame reserves space for
+ them.". It also suggests that a function may use that space to
+ "write incoming arguments 0 to 5" into that space, and that's
+ indeed what GCC seems to be doing. In that case GCC will
+ generate debug information that points to the stack slots instead
+ of the registers, so we should consider the instructions that
+ write out these incoming arguments onto the stack. Of course we
+ only need to do this if we have a stack frame. */
+
+ while (!cache.frameless_p)
+ {
+ unsigned long insn = sparc_fetch_instruction (start_pc);
+
+ /* Recognize instructions that store incoming arguments in
+ %i0...%i5 into the corresponding stack slot. */
+ if (X_OP (insn) == 3 && (X_OP3 (insn) & 0x3c) == 0x04 && X_I (insn)
+ && (X_RD (insn) >= 24 && X_RD (insn) <= 29) && X_RS1 (insn) == 30
+ && X_SIMM13 (insn) == 68 + (X_RD (insn) - 24) * 4)
+ {
+ start_pc += 4;
+ continue;
+ }
+
+ break;
+ }
+
+ return start_pc;
}
/* Normal frames. */
frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
}
+ if (cache->base & 1)
+ cache->base += BIAS;
+
return cache;
}
CORE_ADDR sp;
sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ if (sp & 1)
+ sp += BIAS;
return frame_id_build (sp, frame_pc_unwind (next_frame));
}
\f
if (regnum == i || regnum == -1)
{
target_read_memory (sp + ((i - SPARC_L0_REGNUM) * 8), buf, 8);
+
+ /* Handle StackGhost. */
+ if (i == SPARC_I7_REGNUM)
+ {
+ ULONGEST wcookie = sparc_fetch_wcookie ();
+ ULONGEST i7 = extract_unsigned_integer (buf + offset, 8);
+
+ store_unsigned_integer (buf + offset, 8, i7 ^ wcookie);
+ }
+
regcache_raw_supply (regcache, i, buf);
}
}
if (regnum == -1 || regnum == SPARC_SP_REGNUM || regnum == i)
{
regcache_raw_collect (regcache, i, buf);
+
+ /* Handle StackGhost. */
+ if (i == SPARC_I7_REGNUM)
+ {
+ ULONGEST wcookie = sparc_fetch_wcookie ();
+ ULONGEST i7 = extract_unsigned_integer (buf + offset, 8);
+
+ store_unsigned_integer (buf, 8, i7 ^ wcookie);
+ }
+
target_write_memory (sp + ((i - SPARC_L0_REGNUM) * 8), buf, 8);
}
}