/* Target-dependent code for SPARC.
- Copyright (C) 2003-2013 Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
This file is part of GDB.
#define X_DISP19(i) ((((i) & 0x7ffff) ^ 0x40000) - 0x40000)
#define X_DISP10(i) ((((((i) >> 11) && 0x300) | (((i) >> 5) & 0xff)) ^ 0x200) - 0x200)
#define X_SIMM13(i) ((((i) & 0x1fff) ^ 0x1000) - 0x1000)
+/* Macros to identify some instructions. */
+/* RETURN (RETT in V8) */
+#define X_RETTURN(i) ((X_OP (i) == 0x2) && (X_OP3 (i) == 0x39))
/* Fetch the instruction at PC. Instructions are always big-endian
even if the processor operates in little-endian mode. */
regcache_raw_write (regcache, regnum + 1, buf + 4);
}
\f
+/* Implement "in_function_epilogue_p". */
+
+int
+sparc_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ /* This function must return true if we are one instruction after an
+ instruction that destroyed the stack frame of the current
+ function. The SPARC instructions used to restore the callers
+ stack frame are RESTORE and RETURN/RETT.
+
+ Of these RETURN/RETT is a branch instruction and thus we return
+ true if we are in its delay slot.
+
+ RESTORE is almost always found in the delay slot of a branch
+ instruction that transfers control to the caller, such as JMPL.
+ Thus the next instruction is in the caller frame and we don't
+ need to do anything about it. */
+
+ unsigned int insn = sparc_fetch_instruction (pc - 4);
+
+ return X_RETTURN (insn);
+}
+\f
static CORE_ADDR
sparc32_frame_align (struct gdbarch *gdbarch, CORE_ADDR address)
return arches->gdbarch;
/* Allocate space for the new architecture. */
- tdep = XZALLOC (struct gdbarch_tdep);
+ tdep = XCNEW (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
tdep->pc_regnum = SPARC32_PC_REGNUM;