src/cpu/sparc/vm/sharedRuntime_sparc.cpp

rev 10388 : 8148353: [linux-sparc] Crash in libawt.so on Linux SPARC
Summary: gcc expects clean 32 bit int in 64 bit register on function entry
Reviewed-by:

*** 1347,1359 ****
        // stack to reg
        __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register());
      }
    } else if (dst.first()->is_stack()) {
      // reg to stack
!     __ st_ptr(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS);
    } else {
!     __ mov(src.first()->as_Register(), dst.first()->as_Register());
    }
  }
  
  
  static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst) {
--- 1347,1365 ----
        // stack to reg
        __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register());
      }
    } else if (dst.first()->is_stack()) {
      // reg to stack
!     Register src_reg = src.first()->as_Register();
!     // Some compiler (gcc) expects a clean 32 bit value on function entry
!     __ sra(src_reg, 0, L5);
!     __ st_ptr(L5, SP, reg2offset(dst.first()) + STACK_BIAS);
    } else {
!     Register src_reg = src.first()->as_Register();
!     // Some compiler (gcc) expects a clean 32 bit value on function entry
!     __ sra(src_reg, 0, L5);
!     __ mov(L5, dst.first()->as_Register());
    }
  }
  
  
  static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst) {