FD.io VPP  v16.06
Vector Packet Processing
longjmp.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  Copyright (c) 2005 Eliot Dresselhaus
17 
18  Permission is hereby granted, free of charge, to any person obtaining
19  a copy of this software and associated documentation files (the
20  "Software"), to deal in the Software without restriction, including
21  without limitation the rights to use, copy, modify, merge, publish,
22  distribute, sublicense, and/or sell copies of the Software, and to
23  permit persons to whom the Software is furnished to do so, subject to
24  the following conditions:
25 
26  The above copyright notice and this permission notice shall be
27  included in all copies or substantial portions of the Software.
28 
29  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 */
37 
38 #ifndef included_clib_longjmp_h
39 #define included_clib_longjmp_h
40 
41 #include <vppinfra/types.h>
42 
43 #if defined(__x86_64__)
44 /* rbx, rbp, r12, r13, r14, r15, eip, rsp */
45 #define CLIB_ARCH_LONGJMP_REGS 8
46 
47 #elif defined(i386)
48 /* ebx, ebp, esi, edi, eip, rsp */
49 #define CLIB_ARCH_LONGJMP_REGS 6
50 
51 #elif (defined(__powerpc64__) || defined(__powerpc__))
52 
53 #ifdef __ALTIVEC__
54 #define CLIB_POWERPC_ALTIVEC_N_REGS 12
55 #else
56 #define CLIB_POWERPC_ALTIVEC_N_REGS 0
57 #endif
58 
59 /* r1 r2 link condition+vsave regs 14-31 fp regs 14-31 vector regs 20-31 */
60 #define CLIB_ARCH_LONGJMP_REGS \
61  (/* r1 lr cr vrsave */ \
62  4 \
63  /* gp */ \
64  + (31 - 14 + 1) \
65  /* fp */ \
66  + (sizeof (f64) / sizeof (uword)) * (31 - 14 + 1) \
67  /* vector regs */ \
68  + (16 / sizeof (uword)) * CLIB_POWERPC_ALTIVEC_N_REGS)
69 
70 #elif defined(__SPU__)
71 /* FIXME */
72 #define CLIB_ARCH_LONGJMP_REGS (10)
73 
74 #elif defined(__arm__)
75 
76 #ifndef __IWMMXT__
77 /* v1-v6 sl fp sp lr */
78 #define CLIB_ARCH_LONGJMP_REGS (10)
79 #else
80 /* For iwmmxt we save 6 extra 8 byte registers. */
81 #define CLIB_ARCH_LONGJMP_REGS (10 + (6*2))
82 #endif
83 
84 #elif defined(__xtensa__)
85 
86 /* setjmp/longjmp not supported for the moment. */
87 #define CLIB_ARCH_LONGJMP_REGS 0
88 
89 #elif defined(__TMS320C6X__)
90 
91 /* setjmp/longjmp not supported for the moment. */
92 #define CLIB_ARCH_LONGJMP_REGS 0
93 
94 #elif defined(__aarch64__)
95 #define CLIB_ARCH_LONGJMP_REGS (22)
96 #else
97 #error "unknown machine"
98 #endif
99 
100 typedef struct {
102 } clib_longjmp_t __attribute__ ((aligned (16)));
103 
104 /* Return given value to saved context. */
105 void clib_longjmp (clib_longjmp_t * save, uword return_value);
106 
107 /* Save context. Returns given value if jump is not taken;
108  otherwise returns value from clib_longjmp if long jump is taken. */
109 uword clib_setjmp (clib_longjmp_t * save, uword return_value_not_taken);
110 
111 /* Call function on given stack. */
112 uword clib_calljmp (uword (* func) (uword func_arg),
113  uword func_arg,
114  void * stack);
115 
116 #endif /* included_clib_longjmp_h */
#define CLIB_ARCH_LONGJMP_REGS
Definition: longjmp.h:45
void clib_longjmp(clib_longjmp_t *save, uword return_value)
uword clib_setjmp(clib_longjmp_t *save, uword return_value_not_taken)
u64 uword
Definition: types.h:112
uword clib_calljmp(uword(*func)(uword func_arg), uword func_arg, void *stack)