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- /*
- * Stolen from glibc-2.2.2 by Eddie C. Dost <ecd@atecom.com>
- */
- .text
- .globl _dl_linux_resolver
- .globl _dl_linux_resolve
- .type _dl_linux_resolve, @function
- .balign 16
- _dl_linux_resolve:
- mov.l r2, @-r15 ! see Note2 below
- 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 <allius@atecom.com>
- Note2 - we also have to preserve r2 on the stack as the call into
- C code (_dl_linux_resolver) will use r2 as a scratch register and we
- need it for the address for returning structures,
- David McCullough <davidm@snapgear.com>.
- */
- 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
- mov.l @r15+, r3
- jmp @r0 ! Jump to function address
- mov.l @r15+, r2 ! see Note2 above
- .balign 4
- 3:
- .long _dl_linux_resolver@GOT
- .LG:
- .long _GLOBAL_OFFSET_TABLE_
- .size _dl_linux_resolve, . - _dl_linux_resolve
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