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/*
 * Stolen from glibc-2.2.2 by Eddie C. Dost 
 */
 
        .text
        .globl  _dl_linux_resolver
        .globl  _dl_linux_resolve
        .type   _dl_linux_resolve, @function
        .balign 16
_dl_linux_resolve:
        mov.l   r3, @-r15
        mov.l   r4, @-r15
        mov.l   r5, @-r15
        mov.l   r6, @-r15
        mov.l   r7, @-r15
        mov.l   r12, @-r15
        movt    r3              ! Save T flag
        mov.l   r3, @-r15
 
#ifdef HAVE_FPU
        sts.l   fpscr, @-r15
        mov     #8,r3
        swap.w  r3, r3
        lds     r3, fpscr
        fmov.s  fr11, @-r15
        fmov.s  fr10, @-r15
        fmov.s  fr9, @-r15
        fmov.s  fr8, @-r15
        fmov.s  fr7, @-r15
        fmov.s  fr6, @-r15
        fmov.s  fr5, @-r15
        fmov.s  fr4, @-r15
#endif
        sts.l   pr, @-r15
/* Note - The PLT entries have been "optimised" not to use r2.  r2 is used by
   GCC to return the address of large structures, so it should not be
   corrupted here.  This does mean however, that those PLTs does not conform
   to the SH PIC ABI.  That spec says that r0 contains the type of the PLT
   and r2 contains the GOT id.  The GNU Plt version stores the GOT id in r0 and
   ignores the type.  We can easily detect this difference however,
   since the type will always be 0 or 8, and the GOT ids will always be
   greater than or equal to 12.
 
   Found in binutils/bfd/elf32-sh.c by Stefan Allius 
 */
        mov     #8 ,r5
        cmp/gt  r5, r0
        bt      1f
        mov     r2, r0          ! link map address in r2 (SH PIC ABI)
1:
        mov     r0, r4          ! link map address in r0 (GNUs PLT)
        mova    .LG, r0
        mov.l   .LG, r5
        add     r5, r0
        mov.l   3f, r5
        mov.l   @(r0, r5),r5
        jsr     @r5
         mov    r1, r5          ! Reloc offset
 
        lds.l   @r15+, pr       ! Get register content back
 
#ifdef HAVE_FPU
        fmov.s  @r15+, fr4
        fmov.s  @r15+, fr5
        fmov.s  @r15+, fr6
        fmov.s  @r15+, fr7
        fmov.s  @r15+, fr8
        fmov.s  @r15+, fr9
        fmov.s  @r15+, fr10
        fmov.s  @r15+, fr11
        lds.l   @r15+, fpscr
#endif
 
        mov.l   @r15+, r3
        shal    r3              ! Load T flag
        mov.l   @r15+, r12
        mov.l   @r15+, r7
        mov.l   @r15+, r6
        mov.l   @r15+, r5
        mov.l   @r15+, r4
        jmp     @r0             ! Jump to function address
         mov.l  @r15+, r3
 
        .balign 4
 
3:
        .long   _dl_linux_resolver@GOT
.LG:
        .long   _GLOBAL_OFFSET_TABLE_
        .size   _dl_linux_resolve, . - _dl_linux_resolve
 

Line No.	Rev	Author	Line
1	1325	phoenix	`/*`
2			`* Stolen from glibc-2.2.2 by Eddie C. Dost`
3			`*/`
4
5			`.text`
6			`.globl _dl_linux_resolver`
7			`.globl _dl_linux_resolve`
8			`.type _dl_linux_resolve, @function`
9			`.balign 16`
10			`_dl_linux_resolve:`
11			`mov.l r3, @-r15`
12			`mov.l r4, @-r15`
13			`mov.l r5, @-r15`
14			`mov.l r6, @-r15`
15			`mov.l r7, @-r15`
16			`mov.l r12, @-r15`
17			`movt r3 ! Save T flag`
18			`mov.l r3, @-r15`
19
20			`#ifdef HAVE_FPU`
21			`sts.l fpscr, @-r15`
22			`mov #8,r3`
23			`swap.w r3, r3`
24			`lds r3, fpscr`
25			`fmov.s fr11, @-r15`
26			`fmov.s fr10, @-r15`
27			`fmov.s fr9, @-r15`
28			`fmov.s fr8, @-r15`
29			`fmov.s fr7, @-r15`
30			`fmov.s fr6, @-r15`
31			`fmov.s fr5, @-r15`
32			`fmov.s fr4, @-r15`
33			`#endif`
34			`sts.l pr, @-r15`
35			`/* Note - The PLT entries have been "optimised" not to use r2. r2 is used by`
36			`GCC to return the address of large structures, so it should not be`
37			`corrupted here. This does mean however, that those PLTs does not conform`
38			`to the SH PIC ABI. That spec says that r0 contains the type of the PLT`
39			`and r2 contains the GOT id. The GNU Plt version stores the GOT id in r0 and`
40			`ignores the type. We can easily detect this difference however,`
41			`since the type will always be 0 or 8, and the GOT ids will always be`
42			`greater than or equal to 12.`
43
44			`Found in binutils/bfd/elf32-sh.c by Stefan Allius`
45			`*/`
46			`mov #8 ,r5`
47			`cmp/gt r5, r0`
48			`bt 1f`
49			`mov r2, r0 ! link map address in r2 (SH PIC ABI)`
50			`1:`
51			`mov r0, r4 ! link map address in r0 (GNUs PLT)`
52			`mova .LG, r0`
53			`mov.l .LG, r5`
54			`add r5, r0`
55			`mov.l 3f, r5`
56			`mov.l @(r0, r5),r5`
57			`jsr @r5`
58			`mov r1, r5 ! Reloc offset`
59
60			`lds.l @r15+, pr ! Get register content back`
61
62			`#ifdef HAVE_FPU`
63			`fmov.s @r15+, fr4`
64			`fmov.s @r15+, fr5`
65			`fmov.s @r15+, fr6`
66			`fmov.s @r15+, fr7`
67			`fmov.s @r15+, fr8`
68			`fmov.s @r15+, fr9`
69			`fmov.s @r15+, fr10`
70			`fmov.s @r15+, fr11`
71			`lds.l @r15+, fpscr`
72			`#endif`
73
74			`mov.l @r15+, r3`
75			`shal r3 ! Load T flag`
76			`mov.l @r15+, r12`
77			`mov.l @r15+, r7`
78			`mov.l @r15+, r6`
79			`mov.l @r15+, r5`
80			`mov.l @r15+, r4`
81			`jmp @r0 ! Jump to function address`
82			`mov.l @r15+, r3`
83
84			`.balign 4`
85
86			`3:`
87			`.long _dl_linux_resolver@GOT`
88			`.LG:`
89			`.long _GLOBAL_OFFSET_TABLE_`
90			`.size _dl_linux_resolve, . - _dl_linux_resolve`
91

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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [sh/] [resolve.S] - Blame information for rev 1771