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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [cris/] [ld_sysdep.h] - Blame information for rev 1765

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/* CRIS can never use Elf32_Rel relocations. */
#define ELF_USES_RELOCA
 
/*
 * Get a pointer to the argv array.  On many platforms this can be just
 * the address if the first argument, on other platforms we need to
 * do something a little more subtle here.
 */
#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long *) ARGS)
 
/*
 * Initialization sequence for a GOT.
 */
#define INIT_GOT(GOT_BASE,MODULE)                               \
{                                                               \
        GOT_BASE[1] = (unsigned long) MODULE;                   \
        GOT_BASE[2] = (unsigned long) _dl_linux_resolve;        \
}
 
/*
 * Here is a macro to perform a relocation.  This is only used when
 * bootstrapping the dynamic loader.  RELP is the relocation that we
 * are performing, REL is the pointer to the address we are relocating.
 * SYMBOL is the symbol involved in the relocation, and LOAD is the
 * load address.
 */
#define PERFORM_BOOTSTRAP_RELOC(RELP, REL, SYMBOL, LOAD, SYMTAB)        \
        switch (ELF32_R_TYPE((RELP)->r_info)) {                         \
                case R_CRIS_GLOB_DAT:                                   \
                case R_CRIS_JUMP_SLOT:                                  \
                case R_CRIS_32:                                         \
                        *REL = SYMBOL;                                  \
                        break;                                          \
                case R_CRIS_16_PCREL:                                   \
                        *(short *) *REL = SYMBOL + (RELP)->r_addend - *REL - 2; \
                        break;                                          \
                case R_CRIS_32_PCREL:                                   \
                        *REL = SYMBOL + (RELP)->r_addend - *REL - 4;    \
                        break;                                          \
                case R_CRIS_NONE:                                       \
                        break;                                          \
                case R_CRIS_RELATIVE:                                   \
                        *REL = (unsigned long) LOAD + (RELP)->r_addend; \
                        break;                                          \
                default:                                                \
                        _dl_exit(1);                                    \
                        break;                                          \
        }
 
/*
 * Transfer control to the user's application once the dynamic loader
 * is done. This routine has to exit the current function, then call
 * _dl_elf_main.
 */
#define START() __asm__ volatile ("moveq 0,$r8\n\t" \
                                  "move $r8,$srp\n\t" \
                                  "move.d %1,$sp\n\t" \
                                  "jump %0\n\t" \
                                  : : "r" (_dl_elf_main), "r" (args))
 
/* Defined some magic numbers that this ld.so should accept. */
#define MAGIC1 EM_CRIS
#undef MAGIC2
#define ELF_TARGET "CRIS"
 
struct elf_resolve;
extern unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry);
 
/* Cheap modulo implementation, taken from arm/ld_sysdep.h. */
static inline unsigned long
cris_mod(unsigned long m, unsigned long p)
{
        unsigned long i, t, inc;
 
        i = p;
        t = 0;
 
        while (!(i & (1 << 31))) {
                i <<= 1;
                t++;
        }
 
        t--;
 
        for (inc = t; inc > 2; inc--) {
                i = p << inc;
 
                if (i & (1 << 31))
                        break;
 
                while (m >= i) {
                        m -= i;
                        i <<= 1;
                        if (i & (1 << 31))
                                break;
                        if (i < p)
                                break;
                }
        }
 
        while (m >= p)
                m -= p;
 
        return m;
}
 
#define do_rem(result, n, base) result = cris_mod(n, base);
 
/* 8192 bytes alignment */
#define PAGE_ALIGN 0xffffe000
#define ADDR_ALIGN 0x1fff
#define OFFS_ALIGN 0xffffe000

Line No.	Rev	Author	Line
1	1325	phoenix	`/* CRIS can never use Elf32_Rel relocations. */`
2			`#define ELF_USES_RELOCA`
3
4			`/*`
5			`* Get a pointer to the argv array. On many platforms this can be just`
6			`* the address if the first argument, on other platforms we need to`
7			`* do something a little more subtle here.`
8			`*/`
9			`#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long *) ARGS)`
10
11			`/*`
12			`* Initialization sequence for a GOT.`
13			`*/`
14			`#define INIT_GOT(GOT_BASE,MODULE) \`
15			`{ \`
16			`GOT_BASE[1] = (unsigned long) MODULE; \`
17			`GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \`
18			`}`
19
20			`/*`
21			`* Here is a macro to perform a relocation. This is only used when`
22			`* bootstrapping the dynamic loader. RELP is the relocation that we`
23			`* are performing, REL is the pointer to the address we are relocating.`
24			`* SYMBOL is the symbol involved in the relocation, and LOAD is the`
25			`* load address.`
26			`*/`
27			`#define PERFORM_BOOTSTRAP_RELOC(RELP, REL, SYMBOL, LOAD, SYMTAB) \`
28			`switch (ELF32_R_TYPE((RELP)->r_info)) { \`
29			`case R_CRIS_GLOB_DAT: \`
30			`case R_CRIS_JUMP_SLOT: \`
31			`case R_CRIS_32: \`
32			`*REL = SYMBOL; \`
33			`break; \`
34			`case R_CRIS_16_PCREL: \`
35			`(short ) REL = SYMBOL + (RELP)->r_addend - REL - 2; \`
36			`break; \`
37			`case R_CRIS_32_PCREL: \`
38			`REL = SYMBOL + (RELP)->r_addend - REL - 4; \`
39			`break; \`
40			`case R_CRIS_NONE: \`
41			`break; \`
42			`case R_CRIS_RELATIVE: \`
43			`*REL = (unsigned long) LOAD + (RELP)->r_addend; \`
44			`break; \`
45			`default: \`
46			`_dl_exit(1); \`
47			`break; \`
48			`}`
49
50			`/*`
51			`* Transfer control to the user's application once the dynamic loader`
52			`* is done. This routine has to exit the current function, then call`
53			`* _dl_elf_main.`
54			`*/`
55			`#define START() __asm__ volatile ("moveq 0,$r8\n\t" \`
56			`"move $r8,$srp\n\t" \`
57			`"move.d %1,$sp\n\t" \`
58			`"jump %0\n\t" \`
59			`: : "r" (_dl_elf_main), "r" (args))`
60
61			`/* Defined some magic numbers that this ld.so should accept. */`
62			`#define MAGIC1 EM_CRIS`
63			`#undef MAGIC2`
64			`#define ELF_TARGET "CRIS"`
65
66			`struct elf_resolve;`
67			`extern unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry);`
68
69			`/* Cheap modulo implementation, taken from arm/ld_sysdep.h. */`
70			`static inline unsigned long`
71			`cris_mod(unsigned long m, unsigned long p)`
72			`{`
73			`unsigned long i, t, inc;`
74
75			`i = p;`
76			`t = 0;`
77
78			`while (!(i & (1 << 31))) {`
79			`i <<= 1;`
80			`t++;`
81			`}`
82
83			`t--;`
84
85			`for (inc = t; inc > 2; inc--) {`
86			`i = p << inc;`
87
88			`if (i & (1 << 31))`
89			`break;`
90
91			`while (m >= i) {`
92			`m -= i;`
93			`i <<= 1;`
94			`if (i & (1 << 31))`
95			`break;`
96			`if (i < p)`
97			`break;`
98			`}`
99			`}`
100
101			`while (m >= p)`
102			`m -= p;`
103
104			`return m;`
105			`}`
106
107			`#define do_rem(result, n, base) result = cris_mod(n, base);`
108
109			`/* 8192 bytes alignment */`
110			`#define PAGE_ALIGN 0xffffe000`
111			`#define ADDR_ALIGN 0x1fff`
112			`#define OFFS_ALIGN 0xffffe000`

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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [cris/] [ld_sysdep.h] - Blame information for rev 1765