PS2SDK
PS2 Homebrew Libraries
irx.h
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1 /*
2 # _____ ___ ____ ___ ____
3 # ____| | ____| | | |____|
4 # | ___| |____ ___| ____| | \ PS2DEV Open Source Project.
5 #-----------------------------------------------------------------------
6 # Copyright (c) 2003 Marcus R. Brown <mrbrown@0xd6.org>
7 # Licenced under Academic Free License version 2.0
8 # Review ps2sdk README & LICENSE files for further details.
9 */
10 
16 #ifndef __IRX_H__
17 #define __IRX_H__
18 
19 #include <types.h>
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24 
25 #define IRX_VER(major, minor) ((((major) & 0xff) << 8) + ((minor) & 0xff))
26 
27 struct irx_id {
28  const char *n;
29  u16 v;
30 };
31 
32 #define IRX_ID(name, major, minor) \
33 struct irx_id _irx_id = { \
34  name, IRX_VER(major, minor) \
35 };
36 
37 /*
38  * Module imports
39  */
40 #define IMPORT_MAGIC 0x41e00000
41 
42 struct irx_import_table
43 {
44  u32 magic;
45  struct irx_import_table *next;
46  u16 version;
47  u16 mode;
48  char name[8];
49  void *stubs[];
50 } __attribute ((packed));
51 
52 struct irx_import_stub
53 {
54  u32 jump;
55  u16 fno;
56  u16 ori_zero;
57 } __attribute ((packed));
58 
59 /*
60  * Ugly, yet functional.
61  */
62 #define DECLARE_IMPORT_TABLE(modname, major, minor) \
63 static struct irx_import_table _imp_##modname \
64  __attribute__((section(".text\n\t#"), unused))= { \
65  magic: IMPORT_MAGIC, version: IRX_VER(major, minor), \
66  name: #modname, };
67 
68 #define STR(val) #val
69 // .word 0x03e00008 == jr $ra (return immediately), this value will be patched later
70 #define DECLARE_IMPORT(ord, name) \
71  __asm__ (".section\t.text\n\t" \
72  ".globl\t"#name"\n\t"#name":\n\t" \
73  ".word 0x03e00008\n\t" \
74  ".word " STR(0x24000000|ord));
75 
76 #define END_IMPORT_TABLE \
77  __asm__ (".section\t.text\n\t.word\t0, 0");
78 
79 /*
80  * Module exports
81  *
82  * I'm not sure why GCC won't generate the fptrs initializers, so I fell back
83  * to the above approach to generate the fptrs themselves. Cleaner solutions
84  * requested.
85  */
86 #define EXPORT_MAGIC 0x41c00000
87 
88 void __attribute__((unused)) _retonly();
89 
90 struct irx_export_table {
91  u32 magic;
92  struct irx_export_table *next;
93  u16 version;
94  u16 mode;
95  u8 name[8];
96  void *fptrs[];
97 };
98 
99 #define DECLARE_EXPORT_TABLE(modname, major, minor) \
100 struct irx_export_table _exp_##modname \
101  __attribute__((section(".text\n\t#"), unused)) = { \
102  magic: EXPORT_MAGIC, version: IRX_VER(major, minor), \
103  name: #modname, };
104 
105 #define DECLARE_EXPORT(fptr) \
106  __asm__ (".section\t.text\n\t.word\t" STR(fptr));
107 
108 #define END_EXPORT_TABLE __asm__ (".section\t.text\n\t.word\t0");
109 
110 #ifdef __cplusplus
111 }
112 #endif
113 
114 #endif /* __IRX_H__ */
irx_id
Definition: irx.h:27
irx_export_table
Definition: irx.h:90
__attribute__
Definition: gif_registers.h:38
irx_import_table
Definition: irx.h:42
irx_import_stub
Definition: irx.h:52