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
flat_get_relocate_addr(unsigned long relval)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
m32r_flat_get_addr_from_rp(unsigned long * rp,unsigned long relval,unsigned long textlen)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
m32r_flat_put_addr_at_rp(unsigned long * rp,unsigned long addr,unsigned long relval)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 */
146