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Diffstat (limited to 'sysdeps/m68k/dl-trampoline.S')
| -rw-r--r-- | sysdeps/m68k/dl-trampoline.S | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/sysdeps/m68k/dl-trampoline.S b/sysdeps/m68k/dl-trampoline.S new file mode 100644 index 0000000000..1c1bbf301b --- /dev/null +++ b/sysdeps/m68k/dl-trampoline.S @@ -0,0 +1,222 @@ +/* PLT trampolines. m68k version. + Copyright (C) 2005-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#if !defined (__mcoldfire__) +# define FMOVE fmove.x +# define FPSPACE 12 +#elif defined (__mcffpu__) +# define FMOVE fmove.d +# define FPSPACE 8 +#else +# define FPSPACE 0 +#endif + + .text + .globl _dl_runtime_resolve + .type _dl_runtime_resolve, @function +_dl_runtime_resolve: + cfi_startproc + cfi_adjust_cfa_offset (8) + | Save %a0 (struct return address) and %a1. + move.l %a0, -(%sp) + cfi_adjust_cfa_offset (4) + move.l %a1, -(%sp) + cfi_adjust_cfa_offset (4) + | Call the real address resolver. + jbsr _dl_fixup + | Restore register %a0 and %a1. + move.l (%sp)+, %a1 + cfi_adjust_cfa_offset (-4) + move.l (%sp)+, %a0 + cfi_adjust_cfa_offset (-4) + | Pop parameters + addq.l #8, %sp + cfi_adjust_cfa_offset (-8) + | Call real function. +#ifdef __mcoldfire__ + move.l %d0,-(%sp) + cfi_adjust_cfa_offset (4) + rts +#else + jmp (%d0) +#endif + cfi_endproc + .size _dl_runtime_resolve, . - _dl_runtime_resolve + + .text + .globl _dl_runtime_profile + .type _dl_runtime_profile, @function +_dl_runtime_profile: + cfi_startproc + cfi_adjust_cfa_offset (8) + pea 8(%sp) + cfi_adjust_cfa_offset (4) + move.l %a1, -(%sp) + cfi_adjust_cfa_offset (4) + move.l %a0, -(%sp) + cfi_adjust_cfa_offset (4) + pea -1.w + cfi_adjust_cfa_offset (4) + | Push parameters for _dl_profile_fixup + pea (%sp) + cfi_adjust_cfa_offset (4) + pea 8(%sp) + cfi_adjust_cfa_offset (4) + move.l 32(%sp), -(%sp) + cfi_adjust_cfa_offset (4) + move.l 32(%sp), -(%sp) + cfi_adjust_cfa_offset (4) + move.l 32(%sp), -(%sp) + cfi_adjust_cfa_offset (4) + subq.l #8, %sp + cfi_adjust_cfa_offset (8) + | Call the real address resolver. + jbsr _dl_profile_fixup + | Pop parameters + lea 28(%sp), %sp + cfi_adjust_cfa_offset (-28) + move.l (%sp), %d1 + jpl 1f + addq.l #4, %sp + cfi_adjust_cfa_offset (-4) + | Restore register %a0 and %a1. + move.l (%sp)+, %a0 + cfi_adjust_cfa_offset (-4) + move.l (%sp)+, %a1 + cfi_adjust_cfa_offset (-4) + lea 12(%sp), %sp + cfi_adjust_cfa_offset (-12) + | Call real function. +#ifdef __mcoldfire__ + move.l %d0,-(%sp) + cfi_adjust_cfa_offset (4) + rts +#else + jmp (%d0) +#endif + + /* + +24 return address + +20 PLT1 + +16 PLT2 + +12 %sp + +8 %a1 + +4 %a0 + %sp free + */ +#ifdef __mcoldfire__ + cfi_adjust_cfa_offset (20) +#else + cfi_adjust_cfa_offset (24) +#endif +1: move.l %a2, (%sp) + cfi_rel_offset (%a2, 0) + move.l %sp, %a2 + move.l %sp, %a0 + lea 28(%sp), %a1 + | Round framesize up to longword alignment + addq.l #3, %d1 + and.l #-3, %d1 + sub.l %d1, %a0 + move.l %a0, %sp + cfi_def_cfa_register (%a2) +#ifdef __mcoldfire__ + tst.l %d1 + beq 2f +1: move.l (%a1)+, (%a0)+ + subq.l #4,%d1 + bne 1b +2: +#else + lsr.l #2,%d1 + jra 2f +1: move.l (%a1)+, (%a0)+ +2: dbra %d1,1b +#endif + /* + %a2+24 return address + %a2+20 PLT1 + %a2+16 PLT2 + %a2+12 %sp + %a2+8 %a1 + %a2+4 %a0 + %a2 %a2 + %sp copied stack frame + */ + + move.l 4(%a2), %a0 + move.l 8(%a2), %a1 +#ifdef __mcoldfire__ + pea 2f(%pc) + move.l %d0,-(%sp) + rts +2: +#else + jsr (%d0) +#endif + move.l %a2, %sp + cfi_def_cfa_register (%sp) + move.l (%sp)+, %a2 + cfi_adjust_cfa_offset (4) + cfi_restore (%a2) + /* + +20 return address + +16 PLT1 + +12 PLT2 + +8 %sp + +4 %a1 + %sp %a0 + */ +#ifdef FMOVE + FMOVE %fp0, -(%sp) + cfi_adjust_cfa_offset (FPSPACE) +#endif + move.l %a0, -(%sp) + cfi_adjust_cfa_offset (4) + move.l %d1, -(%sp) + cfi_adjust_cfa_offset (4) + move.l %d0, -(%sp) + cfi_adjust_cfa_offset (4) + pea (%sp) + cfi_adjust_cfa_offset (4) + pea (16+FPSPACE)(%sp) + cfi_adjust_cfa_offset (4) + move.l (32+FPSPACE)(%sp), -(%sp) + cfi_adjust_cfa_offset (4) + move.l (32+FPSPACE)(%sp), -(%sp) + cfi_adjust_cfa_offset (4) + jbsr _dl_call_pltexit + lea 16(%sp), %sp + cfi_adjust_cfa_offset (-16) + move.l (%sp)+, %d0 + cfi_adjust_cfa_offset (-4) + move.l (%sp)+, %d1 + cfi_adjust_cfa_offset (-4) + move.l (%sp)+, %a0 + cfi_adjust_cfa_offset (-4) +#ifdef FMOVE + FMOVE (%sp)+, %fp0 + cfi_adjust_cfa_offset (-FPSPACE) +#endif + lea 20(%sp), %sp + cfi_adjust_cfa_offset (-20) + rts + cfi_endproc + .size _dl_runtime_profile, . - _dl_runtime_profile |