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
21 /* Convert a relocation entry into an address. */
22 static inline unsigned long
flat_get_relocate_addr(unsigned long relval)23 flat_get_relocate_addr (unsigned long relval)
24 {
25 return relval & 0x00ffffff; /* Mask out top 8-bits */
26 }
27
28 #define flat_m32r_get_reloc_type(relval) ((relval) >> 24)
29
30 #define M32R_SETH_OPCODE 0xd0c00000 /* SETH instruction code */
31
32 #define FLAT_M32R_32 0x00 /* 32bits reloc */
33 #define FLAT_M32R_24 0x01 /* unsigned 24bits reloc */
34 #define FLAT_M32R_16 0x02 /* 16bits reloc */
35 #define FLAT_M32R_LO16 0x03 /* signed low 16bits reloc (low()) */
36 #define FLAT_M32R_LO16_DATA 0x04 /* signed low 16bits reloc (low())
37 for a symbol in .data section */
38 /* High 16bits of an address used
39 when the lower 16bbits are treated
40 as unsigned.
41 To create SETH instruction only.
42 0x1X: X means a number of register.
43 0x10 - 0x3F are reserved. */
44 #define FLAT_M32R_HI16_ULO 0x10 /* reloc for SETH Rn,#high(imm16) */
45 /* High 16bits of an address used
46 when the lower 16bbits are treated
47 as signed.
48 To create SETH instruction only.
49 0x2X: X means a number of register.
50 0x20 - 0x4F are reserved. */
51 #define FLAT_M32R_HI16_SLO 0x20 /* reloc for SETH Rn,#shigh(imm16) */
52
53 static unsigned long textlen_for_m32r_lo16_data = 0;
54
m32r_flat_get_addr_from_rp(u32 * rp,u32 relval,u32 textlen)55 static inline unsigned long m32r_flat_get_addr_from_rp (u32 *rp,
56 u32 relval,
57 u32 textlen)
58 {
59 unsigned int reloc = flat_m32r_get_reloc_type (relval);
60 textlen_for_m32r_lo16_data = 0;
61 if (reloc & 0xf0) {
62 unsigned long addr = htonl(*rp);
63 switch (reloc & 0xf0)
64 {
65 case FLAT_M32R_HI16_ULO:
66 case FLAT_M32R_HI16_SLO:
67 if (addr == 0) {
68 /* put "seth Rn,#0x0" instead of 0 (addr). */
69 *rp = (M32R_SETH_OPCODE | ((reloc & 0x0f)<<24));
70 }
71 return addr;
72 default:
73 break;
74 }
75 } else {
76 switch (reloc)
77 {
78 case FLAT_M32R_LO16:
79 return htonl(*rp) & 0xFFFF;
80 case FLAT_M32R_LO16_DATA:
81 /* FIXME: The return value will decrease by textlen
82 at m32r_flat_put_addr_at_rp () */
83 textlen_for_m32r_lo16_data = textlen;
84 return (htonl(*rp) & 0xFFFF) + textlen;
85 case FLAT_M32R_16:
86 return htons(*(unsigned short *)rp) & 0xFFFF;
87 case FLAT_M32R_24:
88 return htonl(*rp) & 0xFFFFFF;
89 case FLAT_M32R_32:
90 return htonl(*rp);
91 default:
92 break;
93 }
94 }
95 return ~0; /* bogus value */
96 }
97
flat_put_addr_at_rp(u32 * rp,u32 addr,u32 relval)98 static inline int flat_put_addr_at_rp(u32 *rp, u32 addr, u32 relval)
99 {
100 unsigned int reloc = flat_m32r_get_reloc_type (relval);
101 if (reloc & 0xf0) {
102 unsigned long Rn = reloc & 0x0f; /* get a number of register */
103 Rn <<= 24; /* 0x0R000000 */
104 reloc &= 0xf0;
105 switch (reloc)
106 {
107 case FLAT_M32R_HI16_ULO: /* To create SETH Rn,#high(imm16) */
108 *rp = (M32R_SETH_OPCODE | Rn
109 | ((addr >> 16) & 0xFFFF));
110 break;
111 case FLAT_M32R_HI16_SLO: /* To create SETH Rn,#shigh(imm16) */
112 *rp = (M32R_SETH_OPCODE | Rn
113 | (((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
114 & 0xFFFF));
115 break;
116 }
117 } else {
118 switch (reloc) {
119 case FLAT_M32R_LO16_DATA:
120 addr -= textlen_for_m32r_lo16_data;
121 textlen_for_m32r_lo16_data = 0;
122 case FLAT_M32R_LO16:
123 *rp = (htonl(*rp) & 0xFFFF0000) | (addr & 0xFFFF);
124 break;
125 case FLAT_M32R_16:
126 *(unsigned short *)rp = addr & 0xFFFF;
127 break;
128 case FLAT_M32R_24:
129 *rp = (htonl(*rp) & 0xFF000000) | (addr & 0xFFFFFF);
130 break;
131 case FLAT_M32R_32:
132 *rp = addr;
133 break;
134 }
135 }
136 return 0;
137 }
138
139 // kludge - text_len is a local variable in the only user.
140 #define flat_get_addr_from_rp(rp, relval, flags, addr, persistent) \
141 (m32r_flat_get_addr_from_rp(rp, relval, text_len), 0)
142
143 #endif /* __ASM_M32R_FLAT_H */
144