1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Various assmbly language/system dependent hacks that are required
* so that we can minimize the amount of platform specific code.
*/
/*
* Define this if the system uses RELOCA.
*/
#undef 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)
/*
* Get the address of the Global offset table. This must be absolute, not
* relative.
*/
#define GET_GOT(X) __asm__("\tmovl %%ebx,%0\n\t" : "=a" (X))
/*
* Initialization sequence for a GOT.
*/
#define INIT_GOT(GOT_BASE,MODULE) \
{ \
GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
GOT_BASE[1] = (unsigned long) MODULE; \
}
/*
* 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) \
switch(ELF32_R_TYPE((RELP)->r_info)){ \
case R_386_32: \
*REL += SYMBOL; \
break; \
case R_386_PC32: \
*REL += SYMBOL - (unsigned long) REL; \
break; \
case R_386_GLOB_DAT: \
case R_386_JMP_SLOT: \
*REL = SYMBOL; \
break; \
case R_386_RELATIVE: \
*REL += (unsigned long) LOAD; \
break; \
default: \
_dl_exit(1); \
}
/*
* Transfer control to the user's application, once the dynamic loader
* is done. This routine has to exit the current function, then
* call the _dl_elf_main function.
*/
#define START() \
__asm__ volatile ("leave\n\t" \
"jmp *%%eax\n\t" \
: "=a" (status) : "a" (_dl_elf_main))
/* Here we define the magic numbers that this dynamic loader should accept */
#define MAGIC1 EM_386
#undef MAGIC2
/* Used for error messages */
#define ELF_TARGET "386"
struct elf_resolve;
extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
#define do_rem(result, n, base) result = (n % base)
|
