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
|
/*
* This function is _not_ called directly. It is jumped to from PLT when
* attempting to use a symbol that has not yet been resolved. The first time a
* jump symbol (such as a function call inside a shared library) is used
* (before it gets resolved) it will jump here. When we get called the stack
* contains reloc_offset and tpnt is in MOF.
*
* We save all the registers, setup R10 and R11 with the right arguments then
* call _dl_linux_resolver(tpnt, reloc_offset). _dl_linux_resolver() figures
* out where the jump symbol is _really_ supposed to have jumped to and returns
* that to us. Once we have that, we overwrite tpnt with this fixed up
* address. We then clean up after ourselves, put all the registers back how we
* found them, then we jump to where the fixed up address, which is where the
* jump symbol that got us here really wanted to jump to in the first place.
*/
.globl _dl_linux_resolve
.type _dl_linux_resolve,@function
_dl_linux_resolve:
push $r13
push $r12
push $r11
push $r10
push $r9
push $r0
push $srp
move.d [$sp+7*4],$r11
move $mof,$r10
#ifdef __PIC__
move.d $pc,$r0
sub.d .:GOTOFF,$r0
move.d _dl_linux_resolver:PLTG,$r9
add.d $r0,$r9
jsr $r9
#else
jsr _dl_linux_resolver
#endif
move.d $r10,[$sp+7*4]
pop $srp
pop $r0
pop $r9
pop $r10
pop $r11
pop $r12
pop $r13
jump [$sp+]
.size _dl_linux_resolve, . - _dl_linux_resolve
|
