5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // A frame represents a physical stack frame (an activation). Frames can be
26 // C or Java frames, and the Java frames can be interpreted or compiled.
27 // In contrast, vframes represent source-level activations, so that one physical frame
28 // can correspond to multiple source level frames because of inlining.
29 // A frame is comprised of {pc, sp, younger_sp}
30
31
32 // Layout of asm interpreter frame:
33 //
34 // 0xfffffff
35 // ......
36 // [last extra incoming arg, (local # Nargs > 6 ? Nargs-1 : undef)]
37 // .. Note: incoming args are copied to local frame area upon entry
38 // [first extra incoming arg, (local # Nargs > 6 ? 6 : undef)]
39 // [6 words for C-arg storage (unused)] Are this and next one really needed?
40 // [C-aggregate-word (unused)] Yes, if want extra params to be in same place as C convention
41 // [16 words for register saving] <--- FP
42 // [interpreter_frame_vm_locals ] (see below)
43
44 // Note: Llocals is always double-word aligned
292 return ((interpreterState)sp_at(interpreter_state_ptr_offset));
293 }
294
295
296 #endif /* CC_INTERP */
297
298
299
300 // Compiled frames
301
302 public:
303 // Tells if this register can hold 64 bits on V9 (really, V8+).
304 static bool holds_a_doubleword(Register reg) {
305 #ifdef _LP64
306 // return true;
307 return reg->is_out() || reg->is_global();
308 #else
309 return reg->is_out() || reg->is_global();
310 #endif
311 }
|
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_SPARC_VM_FRAME_SPARC_HPP
26 #define CPU_SPARC_VM_FRAME_SPARC_HPP
27
28 #include "runtime/synchronizer.hpp"
29 #include "utilities/top.hpp"
30
31 // A frame represents a physical stack frame (an activation). Frames can be
32 // C or Java frames, and the Java frames can be interpreted or compiled.
33 // In contrast, vframes represent source-level activations, so that one physical frame
34 // can correspond to multiple source level frames because of inlining.
35 // A frame is comprised of {pc, sp, younger_sp}
36
37
38 // Layout of asm interpreter frame:
39 //
40 // 0xfffffff
41 // ......
42 // [last extra incoming arg, (local # Nargs > 6 ? Nargs-1 : undef)]
43 // .. Note: incoming args are copied to local frame area upon entry
44 // [first extra incoming arg, (local # Nargs > 6 ? 6 : undef)]
45 // [6 words for C-arg storage (unused)] Are this and next one really needed?
46 // [C-aggregate-word (unused)] Yes, if want extra params to be in same place as C convention
47 // [16 words for register saving] <--- FP
48 // [interpreter_frame_vm_locals ] (see below)
49
50 // Note: Llocals is always double-word aligned
298 return ((interpreterState)sp_at(interpreter_state_ptr_offset));
299 }
300
301
302 #endif /* CC_INTERP */
303
304
305
306 // Compiled frames
307
308 public:
309 // Tells if this register can hold 64 bits on V9 (really, V8+).
310 static bool holds_a_doubleword(Register reg) {
311 #ifdef _LP64
312 // return true;
313 return reg->is_out() || reg->is_global();
314 #else
315 return reg->is_out() || reg->is_global();
316 #endif
317 }
318
319 #endif // CPU_SPARC_VM_FRAME_SPARC_HPP
|