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glibc/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
Paul Eggert 59ba27a63a Replace FSF snail mail address with URLs.
2012-02-09 23:18:22 +00:00

411 lines
13 KiB
ArmAsm
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/* Save current context.
Copyright (C) 2002, 2004, 2006 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>
#include <rtld-global-offsets.h>
#include <shlib-compat.h>
#include <kernel-features.h>
#define __ASSEMBLY__
#include <asm/ptrace.h>
#include <asm/errno.h>
#include "ucontext_i.h"
#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
ENTRY(__novec_getcontext)
CALL_MCOUNT 1
#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
mflr r0
std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
std r0,FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
stdu r1,-128(r1)
cfi_adjust_cfa_offset (128)
std r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
std r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
std r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
std r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
std r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
std r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
std r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
std r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
std r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
std r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
std r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
std r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
std r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
std r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
std r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3)
std r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3)
std r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3)
std r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3)
std r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3)
std r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3)
std r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3)
std r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3)
std r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3)
std r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3)
std r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3)
std r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
std r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3)
std r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3)
mfctr r0
std r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3)
mfxer r0
std r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3)
mfcr r0
std r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3)
/* Set the return value of swapcontext to "success". R3 is the only
register whose value is not preserved in the saved context. */
li r0,0
std r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3)
/* Zero fill fields that can't be set in user state or are unused. */
std r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(34*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(40*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(41*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(42*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3)
/* Set the PT_REGS pointer to the address of sigcontext's gp_regs
field. Struct pt_regs and elf_gregset_t are the same thing.
We kept the regs field for backwards compatibility with
libraries built before we extended sigcontext. */
addi r0,r3,SIGCONTEXT_GP_REGS
std r0,SIGCONTEXT_PT_REGS(r3)
stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3)
stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3)
stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3)
stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3)
stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3)
stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3)
stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3)
stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3)
stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3)
stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3)
stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3)
stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3)
stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3)
stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3)
stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3)
stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3)
stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3)
stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3)
stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3)
stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3)
stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3)
stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3)
stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3)
stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3)
stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3)
stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3)
stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3)
stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3)
stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3)
stfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r3)
mffs fp0
stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
addi r5,r3,UCONTEXT_SIGMASK
li r4,0
li r3,SIG_BLOCK
bl JUMPTARGET(__sigprocmask)
nop
#else
/* If the kernel is not at least 2.4.21 then generate a ENOSYS stub. */
mflr r0
std r0,FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
stdu r1,-128(r1)
cfi_adjust_cfa_offset(128)
li r3,ENOSYS
bl JUMPTARGET(__syscall_error)
nop
li r3,-1
#endif
ld r0,128+FRAME_LR_SAVE(r1)
addi r1,r1,128
mtlr r0
blr
PSEUDO_END(__novec_getcontext)
compat_symbol (libc, __novec_getcontext, getcontext, GLIBC_2_3)
#endif
.section ".toc","aw"
.LC__dl_hwcap:
#ifdef SHARED
.tc _rtld_global_ro[TC],_rtld_global_ro
#else
.tc _dl_hwcap[TC],_dl_hwcap
#endif
.section ".text"
.machine "altivec"
ENTRY(__getcontext)
CALL_MCOUNT 1
#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
mflr r0
std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
std r0,FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
stdu r1,-128(r1)
cfi_adjust_cfa_offset (128)
std r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
std r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
std r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
std r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
std r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
std r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
std r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
std r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
std r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
std r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
std r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
std r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
std r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
std r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
std r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3)
std r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3)
std r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3)
std r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3)
std r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3)
std r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3)
std r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3)
std r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3)
std r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3)
std r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3)
std r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3)
std r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
std r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3)
std r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3)
mfctr r0
std r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3)
mfxer r0
std r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3)
mfcr r0
std r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3)
/* Set the return value of swapcontext to "success". R3 is the only
register whose value is not preserved in the saved context. */
li r0,0
std r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3)
/* Zero fill fields that can't be set in user state or are unused. */
std r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(34*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(40*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(41*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(42*8))(r3)
std r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3)
/* Set the PT_REGS pointer to the address of sigcontext's gp_regs
field. Struct pt_regs and elf_gregset_t are the same thing.
We kept the regs field for backwards compatibility with
libraries built before we extended sigcontext. */
addi r0,r3,SIGCONTEXT_GP_REGS
std r0,SIGCONTEXT_PT_REGS(r3)
stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3)
stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3)
stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3)
stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3)
stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3)
stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3)
stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3)
stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3)
stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3)
stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3)
stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3)
stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3)
stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3)
stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3)
stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3)
stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3)
stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3)
stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3)
stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3)
stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3)
stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3)
stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3)
stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3)
stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3)
stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3)
stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3)
stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3)
stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3)
stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3)
stfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r3)
mffs fp0
stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
ld r5,.LC__dl_hwcap@toc(r2)
# ifdef SHARED
/* Load _rtld-global._dl_hwcap. */
ld r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r5)
# else
ld r5,0(r5) /* Load extern _dl_hwcap. */
# endif
la r10,(SIGCONTEXT_V_RESERVE+8)(r3)
la r9,(SIGCONTEXT_V_RESERVE+24)(r3)
andis. r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16)
clrrdi r10,r10,4
beq L(has_no_vec)
clrrdi r9,r9,4
mr r5,r10 /* Capture *v_regs value in r5. */
stvx v0,0,r10
stvx v1,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v2,0,r10
stvx v3,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v4,0,r10
stvx v5,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v6,0,r10
stvx v7,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v8,0,r10
stvx v9,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v10,0,r10
stvx v11,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v12,0,r10
stvx v13,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v14,0,r10
stvx v15,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v16,0,r10
stvx v17,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v18,0,r10
stvx v19,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v20,0,r10
stvx v21,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v22,0,r10
stvx v23,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v24,0,r10
stvx v25,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v26,0,r10
stvx v27,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v28,0,r10
stvx v29,0,r9
addi r10,r10,32
addi r9,r9,32
stvx v30,0,r10
stvx v31,0,r9
addi r10,r10,32
addi r9,r9,32
mfvscr v0
mfspr r0,VRSAVE
stvx v0,0,r10
stw r0,0(9)
L(has_no_vec):
/*
Store either a NULL or a quadword aligned pointer to the Vector register
array into *v_regs.
*/
std r5,(SIGCONTEXT_V_REGS_PTR)(r3)
addi r5,r3,UCONTEXT_SIGMASK
li r4,0
li r3,SIG_BLOCK
bl JUMPTARGET(__sigprocmask)
nop
#else
/* If the kernel is not at least 2.4.21 then generate a ENOSYS stub. */
mflr r0
std r0,FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
stdu r1,-128(r1)
cfi_adjust_cfa_offset (128)
li r3,ENOSYS
bl JUMPTARGET(__syscall_error)
nop
li r3,-1
#endif
ld r0,128+FRAME_LR_SAVE(r1)
addi r1,r1,128
mtlr r0
blr
PSEUDO_END(__getcontext)
versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_4)
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