flat: fix data sections alignment
[sfrench/cifs-2.6.git] / arch / m32r / include / asm / flat.h
1 /*
2  * include/asm-m32r/flat.h
3  *
4  * uClinux flat-format executables
5  *
6  * Copyright (C) 2004  Kazuhiro Inaoka
7  *
8  * This file is subject to the terms and conditions of the GNU General Public
9  * License.  See the file "COPYING" in the main directory of this archive for
10  * more details.
11  */
12 #ifndef __ASM_M32R_FLAT_H
13 #define __ASM_M32R_FLAT_H
14
15 #define flat_argvp_envp_on_stack()              0
16 #define flat_old_ram_flag(flags)                (flags)
17 #define flat_set_persistent(relval, p)          0
18 #define flat_reloc_valid(reloc, size)           \
19         (((reloc) - textlen_for_m32r_lo16_data) <= (size))
20 #define flat_get_addr_from_rp(rp, relval, flags, persistent) \
21         m32r_flat_get_addr_from_rp(rp, relval, (text_len) )
22
23 #define flat_put_addr_at_rp(rp, addr, relval) \
24         m32r_flat_put_addr_at_rp(rp, addr, relval)
25
26 /* Convert a relocation entry into an address.  */
27 static inline unsigned long
28 flat_get_relocate_addr (unsigned long relval)
29 {
30         return relval & 0x00ffffff; /* Mask out top 8-bits */
31 }
32
33 #define flat_m32r_get_reloc_type(relval)        ((relval) >> 24)
34
35 #define M32R_SETH_OPCODE        0xd0c00000 /* SETH instruction code */
36
37 #define FLAT_M32R_32            0x00    /* 32bits reloc */
38 #define FLAT_M32R_24            0x01    /* unsigned 24bits reloc */
39 #define FLAT_M32R_16            0x02    /* 16bits reloc */
40 #define FLAT_M32R_LO16          0x03    /* signed low 16bits reloc (low()) */
41 #define FLAT_M32R_LO16_DATA     0x04    /* signed low 16bits reloc (low())
42                                            for a symbol in .data section */
43                                         /* High 16bits of an address used
44                                            when the lower 16bbits are treated
45                                            as unsigned.
46                                            To create SETH instruction only.
47                                            0x1X: X means a number of register.
48                                            0x10 - 0x3F are reserved. */
49 #define FLAT_M32R_HI16_ULO      0x10    /* reloc for SETH Rn,#high(imm16) */
50                                         /* High 16bits of an address used
51                                            when the lower 16bbits are treated
52                                            as signed.
53                                            To create SETH instruction only.
54                                            0x2X: X means a number of register.
55                                            0x20 - 0x4F are reserved. */
56 #define FLAT_M32R_HI16_SLO      0x20    /* reloc for SETH Rn,#shigh(imm16) */
57
58 static unsigned long textlen_for_m32r_lo16_data = 0;
59
60 static inline unsigned long m32r_flat_get_addr_from_rp (unsigned long *rp,
61                                                         unsigned long relval,
62                                                         unsigned long textlen)
63 {
64         unsigned int reloc = flat_m32r_get_reloc_type (relval);
65         textlen_for_m32r_lo16_data = 0;
66         if (reloc & 0xf0) {
67                 unsigned long addr = htonl(*rp);
68                 switch (reloc & 0xf0)
69                 {
70                 case FLAT_M32R_HI16_ULO:
71                 case FLAT_M32R_HI16_SLO:
72                         if (addr == 0) {
73                                 /* put "seth Rn,#0x0" instead of 0 (addr). */
74                                 *rp = (M32R_SETH_OPCODE | ((reloc & 0x0f)<<24));
75                         }
76                         return addr;
77                 default:
78                         break;
79                 }
80         } else {
81                 switch (reloc)
82                 {
83                 case FLAT_M32R_LO16:
84                         return htonl(*rp) & 0xFFFF;
85                 case FLAT_M32R_LO16_DATA:
86                         /* FIXME: The return value will decrease by textlen
87                            at m32r_flat_put_addr_at_rp () */
88                         textlen_for_m32r_lo16_data = textlen;
89                         return (htonl(*rp) & 0xFFFF) + textlen;
90                 case FLAT_M32R_16:
91                         return htons(*(unsigned short *)rp) & 0xFFFF;
92                 case FLAT_M32R_24:
93                         return htonl(*rp) & 0xFFFFFF;
94                 case FLAT_M32R_32:
95                         return htonl(*rp);
96                 default:
97                         break;
98                 }
99         }
100         return ~0;      /* bogus value */
101 }
102
103 static inline void m32r_flat_put_addr_at_rp (unsigned long *rp,
104                                              unsigned long addr,
105                                              unsigned long relval)
106 {
107         unsigned int reloc = flat_m32r_get_reloc_type (relval);
108         if (reloc & 0xf0) {
109                 unsigned long Rn = reloc & 0x0f; /* get a number of register */
110                 Rn <<= 24; /* 0x0R000000 */
111                 reloc &= 0xf0;
112                 switch (reloc)
113                 {
114                 case FLAT_M32R_HI16_ULO: /* To create SETH Rn,#high(imm16) */
115                         *rp = (M32R_SETH_OPCODE | Rn
116                                | ((addr >> 16) & 0xFFFF));
117                         break;
118                 case FLAT_M32R_HI16_SLO: /* To create SETH Rn,#shigh(imm16) */
119                         *rp = (M32R_SETH_OPCODE | Rn
120                                | (((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
121                                   & 0xFFFF));
122                         break;
123                 }
124         } else {
125                 switch (reloc) {
126                 case FLAT_M32R_LO16_DATA:
127                         addr -= textlen_for_m32r_lo16_data;
128                         textlen_for_m32r_lo16_data = 0;
129                 case FLAT_M32R_LO16:
130                         *rp = (htonl(*rp) & 0xFFFF0000) | (addr & 0xFFFF);
131                         break;
132                 case FLAT_M32R_16:
133                         *(unsigned short *)rp = addr & 0xFFFF;
134                         break;
135                 case FLAT_M32R_24:
136                         *rp = (htonl(*rp) & 0xFF000000) | (addr & 0xFFFFFF);
137                         break;
138                 case FLAT_M32R_32:
139                         *rp = addr;
140                         break;
141                 }
142         }
143 }
144
145 #endif /* __ASM_M32R_FLAT_H */