/* This file contains the exception-handling save_world and
|
/* This file contains the exception-handling save_world and
|
* restore_world routines, which need to do a run-time check to see if
|
* restore_world routines, which need to do a run-time check to see if
|
* they should save and restore the vector registers.
|
* they should save and restore the vector registers.
|
*
|
*
|
* Copyright (C) 2004 Free Software Foundation, Inc.
|
* Copyright (C) 2004 Free Software Foundation, Inc.
|
*
|
*
|
* This file is free software; you can redistribute it and/or modify it
|
* This file is free software; you can redistribute it and/or modify it
|
* under the terms of the GNU General Public License as published by the
|
* under the terms of the GNU General Public License as published by the
|
* Free Software Foundation; either version 2, or (at your option) any
|
* Free Software Foundation; either version 2, or (at your option) any
|
* later version.
|
* later version.
|
*
|
*
|
* In addition to the permissions in the GNU General Public License, the
|
* In addition to the permissions in the GNU General Public License, the
|
* Free Software Foundation gives you unlimited permission to link the
|
* Free Software Foundation gives you unlimited permission to link the
|
* compiled version of this file with other programs, and to distribute
|
* compiled version of this file with other programs, and to distribute
|
* those programs without any restriction coming from the use of this
|
* those programs without any restriction coming from the use of this
|
* file. (The General Public License restrictions do apply in other
|
* file. (The General Public License restrictions do apply in other
|
* respects; for example, they cover modification of the file, and
|
* respects; for example, they cover modification of the file, and
|
* distribution when not linked into another program.)
|
* distribution when not linked into another program.)
|
*
|
*
|
* This file is distributed in the hope that it will be useful, but
|
* This file is distributed in the hope that it will be useful, but
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
* General Public License for more details.
|
* General Public License for more details.
|
*
|
*
|
* You should have received a copy of the GNU General Public License
|
* You should have received a copy of the GNU General Public License
|
* along with this program; see the file COPYING. If not, write to
|
* along with this program; see the file COPYING. If not, write to
|
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
* Boston, MA 02110-1301, USA.
|
* Boston, MA 02110-1301, USA.
|
*
|
*
|
* As a special exception, if you link this library with files
|
* As a special exception, if you link this library with files
|
* compiled with GCC to produce an executable, this does not cause the
|
* compiled with GCC to produce an executable, this does not cause the
|
* resulting executable to be covered by the GNU General Public License.
|
* resulting executable to be covered by the GNU General Public License.
|
* This exception does not however invalidate any other reasons why the
|
* This exception does not however invalidate any other reasons why the
|
* executable file might be covered by the GNU General Public License.
|
* executable file might be covered by the GNU General Public License.
|
*/
|
*/
|
|
|
.machine ppc7400
|
.machine ppc7400
|
.data
|
.data
|
.align 2
|
.align 2
|
|
|
#ifdef __DYNAMIC__
|
#ifdef __DYNAMIC__
|
|
|
.non_lazy_symbol_pointer
|
.non_lazy_symbol_pointer
|
L_has_vec$non_lazy_ptr:
|
L_has_vec$non_lazy_ptr:
|
.indirect_symbol __cpu_has_altivec
|
.indirect_symbol __cpu_has_altivec
|
#ifdef __ppc64__
|
#ifdef __ppc64__
|
.quad 0
|
.quad 0
|
#else
|
#else
|
.long 0
|
.long 0
|
#endif
|
#endif
|
|
|
#else
|
#else
|
|
|
/* For static, "pretend" we have a non-lazy-pointer. */
|
/* For static, "pretend" we have a non-lazy-pointer. */
|
|
|
L_has_vec$non_lazy_ptr:
|
L_has_vec$non_lazy_ptr:
|
.long __cpu_has_altivec
|
.long __cpu_has_altivec
|
|
|
#endif
|
#endif
|
|
|
|
|
.text
|
.text
|
.align 2
|
.align 2
|
|
|
/* save_world and rest_world save/restore F14-F31 and possibly V20-V31
|
/* save_world and rest_world save/restore F14-F31 and possibly V20-V31
|
(assuming you have a CPU with vector registers; we use a global var
|
(assuming you have a CPU with vector registers; we use a global var
|
provided by the System Framework to determine this.)
|
provided by the System Framework to determine this.)
|
|
|
SAVE_WORLD takes R0 (the caller`s caller`s return address) and R11
|
SAVE_WORLD takes R0 (the caller`s caller`s return address) and R11
|
(the stack frame size) as parameters. It returns VRsave in R0 if
|
(the stack frame size) as parameters. It returns VRsave in R0 if
|
we`re on a CPU with vector regs.
|
we`re on a CPU with vector regs.
|
|
|
With gcc3, we now need to save and restore CR as well, since gcc3's
|
With gcc3, we now need to save and restore CR as well, since gcc3's
|
scheduled prologs can cause comparisons to be moved before calls to
|
scheduled prologs can cause comparisons to be moved before calls to
|
save_world!
|
save_world!
|
|
|
USES: R0 R11 R12 */
|
USES: R0 R11 R12 */
|
|
|
.private_extern save_world
|
.private_extern save_world
|
save_world:
|
save_world:
|
stw r0,8(r1)
|
stw r0,8(r1)
|
mflr r0
|
mflr r0
|
bcl 20,31,Ls$pb
|
bcl 20,31,Ls$pb
|
Ls$pb: mflr r12
|
Ls$pb: mflr r12
|
addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Ls$pb)
|
addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Ls$pb)
|
lwz r12,lo16(L_has_vec$non_lazy_ptr-Ls$pb)(r12)
|
lwz r12,lo16(L_has_vec$non_lazy_ptr-Ls$pb)(r12)
|
mtlr r0
|
mtlr r0
|
lwz r12,0(r12)
|
lwz r12,0(r12)
|
/* grab CR */
|
/* grab CR */
|
mfcr r0
|
mfcr r0
|
/* test HAS_VEC */
|
/* test HAS_VEC */
|
cmpwi r12,0
|
cmpwi r12,0
|
stfd f14,-144(r1)
|
stfd f14,-144(r1)
|
stfd f15,-136(r1)
|
stfd f15,-136(r1)
|
stfd f16,-128(r1)
|
stfd f16,-128(r1)
|
stfd f17,-120(r1)
|
stfd f17,-120(r1)
|
stfd f18,-112(r1)
|
stfd f18,-112(r1)
|
stfd f19,-104(r1)
|
stfd f19,-104(r1)
|
stfd f20,-96(r1)
|
stfd f20,-96(r1)
|
stfd f21,-88(r1)
|
stfd f21,-88(r1)
|
stfd f22,-80(r1)
|
stfd f22,-80(r1)
|
stfd f23,-72(r1)
|
stfd f23,-72(r1)
|
stfd f24,-64(r1)
|
stfd f24,-64(r1)
|
stfd f25,-56(r1)
|
stfd f25,-56(r1)
|
stfd f26,-48(r1)
|
stfd f26,-48(r1)
|
stfd f27,-40(r1)
|
stfd f27,-40(r1)
|
stfd f28,-32(r1)
|
stfd f28,-32(r1)
|
stfd f29,-24(r1)
|
stfd f29,-24(r1)
|
stfd f30,-16(r1)
|
stfd f30,-16(r1)
|
stfd f31,-8(r1)
|
stfd f31,-8(r1)
|
stmw r13,-220(r1)
|
stmw r13,-220(r1)
|
/* stash CR */
|
/* stash CR */
|
stw r0,4(r1)
|
stw r0,4(r1)
|
/* set R12 pointing at Vector Reg save area */
|
/* set R12 pointing at Vector Reg save area */
|
addi r12,r1,-224
|
addi r12,r1,-224
|
/* allocate stack frame */
|
/* allocate stack frame */
|
stwux r1,r1,r11
|
stwux r1,r1,r11
|
/* ...but return if HAS_VEC is zero */
|
/* ...but return if HAS_VEC is zero */
|
bne+ L$saveVMX
|
bne+ L$saveVMX
|
/* Not forgetting to restore CR. */
|
/* Not forgetting to restore CR. */
|
mtcr r0
|
mtcr r0
|
blr
|
blr
|
|
|
L$saveVMX:
|
L$saveVMX:
|
/* We're saving Vector regs too. */
|
/* We're saving Vector regs too. */
|
/* Restore CR from R0. No More Branches! */
|
/* Restore CR from R0. No More Branches! */
|
mtcr r0
|
mtcr r0
|
|
|
/* We should really use VRSAVE to figure out which vector regs
|
/* We should really use VRSAVE to figure out which vector regs
|
we actually need to save and restore. Some other time :-/ */
|
we actually need to save and restore. Some other time :-/ */
|
|
|
li r11,-192
|
li r11,-192
|
stvx v20,r11,r12
|
stvx v20,r11,r12
|
li r11,-176
|
li r11,-176
|
stvx v21,r11,r12
|
stvx v21,r11,r12
|
li r11,-160
|
li r11,-160
|
stvx v22,r11,r12
|
stvx v22,r11,r12
|
li r11,-144
|
li r11,-144
|
stvx v23,r11,r12
|
stvx v23,r11,r12
|
li r11,-128
|
li r11,-128
|
stvx v24,r11,r12
|
stvx v24,r11,r12
|
li r11,-112
|
li r11,-112
|
stvx v25,r11,r12
|
stvx v25,r11,r12
|
li r11,-96
|
li r11,-96
|
stvx v26,r11,r12
|
stvx v26,r11,r12
|
li r11,-80
|
li r11,-80
|
stvx v27,r11,r12
|
stvx v27,r11,r12
|
li r11,-64
|
li r11,-64
|
stvx v28,r11,r12
|
stvx v28,r11,r12
|
li r11,-48
|
li r11,-48
|
stvx v29,r11,r12
|
stvx v29,r11,r12
|
li r11,-32
|
li r11,-32
|
stvx v30,r11,r12
|
stvx v30,r11,r12
|
mfspr r0,VRsave
|
mfspr r0,VRsave
|
li r11,-16
|
li r11,-16
|
stvx v31,r11,r12
|
stvx v31,r11,r12
|
/* VRsave lives at -224(R1) */
|
/* VRsave lives at -224(R1) */
|
stw r0,0(r12)
|
stw r0,0(r12)
|
blr
|
blr
|
|
|
|
|
/* eh_rest_world_r10 is jumped to, not called, so no need to worry about LR.
|
/* eh_rest_world_r10 is jumped to, not called, so no need to worry about LR.
|
R10 is the C++ EH stack adjust parameter, we return to the caller`s caller.
|
R10 is the C++ EH stack adjust parameter, we return to the caller`s caller.
|
|
|
USES: R0 R10 R11 R12 and R7 R8
|
USES: R0 R10 R11 R12 and R7 R8
|
RETURNS: C++ EH Data registers (R3 - R6.)
|
RETURNS: C++ EH Data registers (R3 - R6.)
|
|
|
We now set up R7/R8 and jump to rest_world_eh_r7r8.
|
We now set up R7/R8 and jump to rest_world_eh_r7r8.
|
|
|
rest_world doesn't use the R10 stack adjust parameter, nor does it
|
rest_world doesn't use the R10 stack adjust parameter, nor does it
|
pick up the R3-R6 exception handling stuff. */
|
pick up the R3-R6 exception handling stuff. */
|
|
|
.private_extern rest_world
|
.private_extern rest_world
|
rest_world:
|
rest_world:
|
/* Pickup previous SP */
|
/* Pickup previous SP */
|
lwz r11, 0(r1)
|
lwz r11, 0(r1)
|
li r7, 0
|
li r7, 0
|
lwz r8, 8(r11)
|
lwz r8, 8(r11)
|
li r10, 0
|
li r10, 0
|
b rest_world_eh_r7r8
|
b rest_world_eh_r7r8
|
|
|
.private_extern eh_rest_world_r10
|
.private_extern eh_rest_world_r10
|
eh_rest_world_r10:
|
eh_rest_world_r10:
|
/* Pickup previous SP */
|
/* Pickup previous SP */
|
lwz r11, 0(r1)
|
lwz r11, 0(r1)
|
mr r7,r10
|
mr r7,r10
|
lwz r8, 8(r11)
|
lwz r8, 8(r11)
|
/* pickup the C++ EH data regs (R3 - R6.) */
|
/* pickup the C++ EH data regs (R3 - R6.) */
|
lwz r6,-420(r11)
|
lwz r6,-420(r11)
|
lwz r5,-424(r11)
|
lwz r5,-424(r11)
|
lwz r4,-428(r11)
|
lwz r4,-428(r11)
|
lwz r3,-432(r11)
|
lwz r3,-432(r11)
|
|
|
b rest_world_eh_r7r8
|
b rest_world_eh_r7r8
|
|
|
/* rest_world_eh_r7r8 is jumped to -- not called! -- when we're doing
|
/* rest_world_eh_r7r8 is jumped to -- not called! -- when we're doing
|
the exception-handling epilog. R7 contains the offset to add to
|
the exception-handling epilog. R7 contains the offset to add to
|
the SP, and R8 contains the 'real' return address.
|
the SP, and R8 contains the 'real' return address.
|
|
|
USES: R0 R11 R12 [R7/R8]
|
USES: R0 R11 R12 [R7/R8]
|
RETURNS: C++ EH Data registers (R3 - R6.) */
|
RETURNS: C++ EH Data registers (R3 - R6.) */
|
|
|
rest_world_eh_r7r8:
|
rest_world_eh_r7r8:
|
bcl 20,31,Lr7r8$pb
|
bcl 20,31,Lr7r8$pb
|
Lr7r8$pb: mflr r12
|
Lr7r8$pb: mflr r12
|
lwz r11,0(r1)
|
lwz r11,0(r1)
|
/* R11 := previous SP */
|
/* R11 := previous SP */
|
addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Lr7r8$pb)
|
addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Lr7r8$pb)
|
lwz r12,lo16(L_has_vec$non_lazy_ptr-Lr7r8$pb)(r12)
|
lwz r12,lo16(L_has_vec$non_lazy_ptr-Lr7r8$pb)(r12)
|
lwz r0,4(r11)
|
lwz r0,4(r11)
|
/* R0 := old CR */
|
/* R0 := old CR */
|
lwz r12,0(r12)
|
lwz r12,0(r12)
|
/* R12 := HAS_VEC */
|
/* R12 := HAS_VEC */
|
mtcr r0
|
mtcr r0
|
cmpwi r12,0
|
cmpwi r12,0
|
lmw r13,-220(r11)
|
lmw r13,-220(r11)
|
beq L.rest_world_fp_eh
|
beq L.rest_world_fp_eh
|
/* restore VRsave and V20..V31 */
|
/* restore VRsave and V20..V31 */
|
lwz r0,-224(r11)
|
lwz r0,-224(r11)
|
li r12,-416
|
li r12,-416
|
mtspr VRsave,r0
|
mtspr VRsave,r0
|
lvx v20,r11,r12
|
lvx v20,r11,r12
|
li r12,-400
|
li r12,-400
|
lvx v21,r11,r12
|
lvx v21,r11,r12
|
li r12,-384
|
li r12,-384
|
lvx v22,r11,r12
|
lvx v22,r11,r12
|
li r12,-368
|
li r12,-368
|
lvx v23,r11,r12
|
lvx v23,r11,r12
|
li r12,-352
|
li r12,-352
|
lvx v24,r11,r12
|
lvx v24,r11,r12
|
li r12,-336
|
li r12,-336
|
lvx v25,r11,r12
|
lvx v25,r11,r12
|
li r12,-320
|
li r12,-320
|
lvx v26,r11,r12
|
lvx v26,r11,r12
|
li r12,-304
|
li r12,-304
|
lvx v27,r11,r12
|
lvx v27,r11,r12
|
li r12,-288
|
li r12,-288
|
lvx v28,r11,r12
|
lvx v28,r11,r12
|
li r12,-272
|
li r12,-272
|
lvx v29,r11,r12
|
lvx v29,r11,r12
|
li r12,-256
|
li r12,-256
|
lvx v30,r11,r12
|
lvx v30,r11,r12
|
li r12,-240
|
li r12,-240
|
lvx v31,r11,r12
|
lvx v31,r11,r12
|
|
|
L.rest_world_fp_eh:
|
L.rest_world_fp_eh:
|
lfd f14,-144(r11)
|
lfd f14,-144(r11)
|
lfd f15,-136(r11)
|
lfd f15,-136(r11)
|
lfd f16,-128(r11)
|
lfd f16,-128(r11)
|
lfd f17,-120(r11)
|
lfd f17,-120(r11)
|
lfd f18,-112(r11)
|
lfd f18,-112(r11)
|
lfd f19,-104(r11)
|
lfd f19,-104(r11)
|
lfd f20,-96(r11)
|
lfd f20,-96(r11)
|
lfd f21,-88(r11)
|
lfd f21,-88(r11)
|
lfd f22,-80(r11)
|
lfd f22,-80(r11)
|
lfd f23,-72(r11)
|
lfd f23,-72(r11)
|
lfd f24,-64(r11)
|
lfd f24,-64(r11)
|
lfd f25,-56(r11)
|
lfd f25,-56(r11)
|
lfd f26,-48(r11)
|
lfd f26,-48(r11)
|
lfd f27,-40(r11)
|
lfd f27,-40(r11)
|
lfd f28,-32(r11)
|
lfd f28,-32(r11)
|
lfd f29,-24(r11)
|
lfd f29,-24(r11)
|
lfd f30,-16(r11)
|
lfd f30,-16(r11)
|
/* R8 is the exception-handler's address */
|
/* R8 is the exception-handler's address */
|
mtctr r8
|
mtctr r8
|
lfd f31,-8(r11)
|
lfd f31,-8(r11)
|
/* set SP to original value + R7 offset */
|
/* set SP to original value + R7 offset */
|
add r1,r11,r7
|
add r1,r11,r7
|
bctr
|
bctr
|
|
|
