diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/dl-trampoline.S')
| -rw-r--r-- | sysdeps/sparc/sparc32/dl-trampoline.S | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc32/dl-trampoline.S b/sysdeps/sparc/sparc32/dl-trampoline.S new file mode 100644 index 0000000000..4b7853029a --- /dev/null +++ b/sysdeps/sparc/sparc32/dl-trampoline.S @@ -0,0 +1,155 @@ +/* PLT trampolines. Sparc 32-bit version. + Copyright (C) 2005 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + + .text + .align 32 + + /* %g1: PLT offset loaded by PLT entry + * %g2: callers PC, which is PLT0 + 4, and we store the + * link map at PLT0 + 12, therefore we add 8 to get + * the address of the link map + */ + .globl _dl_runtime_resolve + .type _dl_runtime_resolve, @function +_dl_runtime_resolve: + save %sp, -104, %sp + ld [%g2 + 8], %o0 + srl %g1, 10, %o1 + call _dl_fixup + sub %o1, 4*12, %o1 + jmp %o0 + restore + .size _dl_runtime_resolve, .-_dl_runtime_resolve + + /* For the profiling cases we pass in our stack frame + * as the base of the La_sparc64_regs, so it looks + * like: + * %l0 %sp + * ... + * %l7 %sp + (7 * 8) + * %i0 %sp + (8 * 8) + * ... + * %i7 %sp + (15 * 8) + * %f0 %sp + (16 * 8) + * %f16 %sp + (31 * 8) + * framesize %sp + (32 * 8) + */ + + .globl _dl_profile_save_regs + .type _dl_profile_save_regs, @function +_dl_profile_save_regs: + std %l0, [%sp + ( 0 * 8)] + std %l2, [%sp + ( 1 * 8)] + std %l4, [%sp + ( 2 * 8)] + std %l6, [%sp + ( 3 * 8)] + std %i0, [%sp + ( 4 * 8)] + std %i2, [%sp + ( 5 * 8)] + std %i4, [%sp + ( 6 * 8)] + std %i6, [%sp + ( 7 * 8)] + ld [%sp + (8 * 8)], %l4 + retl + st %l4, [%sp + (8 * 8)] + .size _dl_profile_save_regs, .-_dl_profile_save_regs + + /* If we are going to call pltexit, then we must replicate + * the caller's stack frame. + * %o0: PLT resolved function address + */ + .globl _dl_profile_invoke + .type _dl_profile_invoke, @function +_dl_profile_invoke: + sub %sp, %l0, %sp +1: + srl %l0, 3, %l7 + mov %o0, %l1 + mov %i0, %o0 + mov %i1, %o1 + mov %i2, %o2 + mov %i3, %o3 + mov %i4, %o4 + mov %i5, %o5 + mov %fp, %l2 + mov %sp, %l3 +1: ldd [%l2], %g2 + add %l2, 0x8, %l2 + subcc %l7, 1, %l7 + std %g2, [%l3] + bne 1b + add %l3, 0x8, %l3 + + jmpl %l1, %o7 + nop + + std %o0, [%sp + ( 9 * 8)] + std %f0, [%sp + (10 * 8)] + + mov %l5, %o0 + mov %l6, %o1 + add %sp, %l0, %o2 + call _dl_call_pltexit + add %sp, (16 * 8), %o3 + + ldd [%sp + (9 * 8)], %i0 + + jmpl %i7 + 8, %g0 + restore + + /* %g1: PLT offset loaded by PLT entry + * %g2: callers PC, which is PLT0 + 4, and we store the + * link map at PLT0 + 12, therefore we add 8 to get + * the address of the link map + */ + .align 32 + .globl _dl_runtime_profile + .type _dl_runtime_profile, @function +_dl_runtime_profile: + cmp %fp, 0 + be,a 1f + mov 104, %g3 + sub %fp, %sp, %g3 +1: save %sp, -104, %sp + ld [%g2 + 8], %o0 + srl %g1, 10, %o1 + mov %i7, %o2 + sub %o1, 4*12, %o1 + + mov %g3, %l0 + mov %o0, %l5 + mov %o1, %l6 + + call _dl_profile_save_regs + nop + + mov %sp, %o3 + call _dl_profile_fixup + add %sp, (9 * 8), %o4 + + ld [%sp + (9 * 8)], %o1 + cmp %o1, 0 + bgeu 1f + nop + + call _dl_profile_invoke + nop + +1: jmp %o0 + restore + .size _dl_runtime_profile, .-_dl_runtime_profile |