mirror of
https://sourceware.org/git/glibc.git
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6ddd37a4b3
#include for kernel-features.h. * sysdeps/unix/sysv/linux/alpha/dl-sysdep.c: Likewise. * sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c: Likewise. * sysdeps/unix/sysv/linux/alpha/getitimer.S: Likewise. * sysdeps/unix/sysv/linux/alpha/getrusage.S: Likewise. * sysdeps/unix/sysv/linux/alpha/gettimeofday.S: Likewise. * sysdeps/unix/sysv/linux/alpha/msgctl.c: Likewise. * sysdeps/unix/sysv/linux/alpha/select.S: Likewise. * sysdeps/unix/sysv/linux/alpha/semctl.c: Likewise. * sysdeps/unix/sysv/linux/alpha/setitimer.S: Likewise. * sysdeps/unix/sysv/linux/alpha/settimeofday.S: Likewise. * sysdeps/unix/sysv/linux/alpha/shmctl.c: Likewise. * sysdeps/unix/sysv/linux/alpha/utimes.S: Likewise. * sysdeps/unix/sysv/linux/alpha/wait4.S: Likewise. * sysdeps/unix/sysv/linux/alpha/xstatconv.h: Likewise. * sysdeps/unix/sysv/linux/check_pf.c: Likewise. * sysdeps/unix/sysv/linux/clock_getcpuclockid.c: Likewise. * sysdeps/unix/sysv/linux/clock_getres.c: Likewise. * sysdeps/unix/sysv/linux/clock_gettime.c: Likewise. * sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise. * sysdeps/unix/sysv/linux/clock_settime.c: Likewise. * sysdeps/unix/sysv/linux/dl-execstack.c: Likewise. * sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise. * sysdeps/unix/sysv/linux/dl-sysdep.c: Likewise. * sysdeps/unix/sysv/linux/fstatvfs64.c: Likewise. * sysdeps/unix/sysv/linux/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/futimes.c: Likewise. * sysdeps/unix/sysv/linux/futimesat.c: Likewise. * sysdeps/unix/sysv/linux/fxstat64.c: Likewise. * sysdeps/unix/sysv/linux/fxstatat64.c: Likewise. * sysdeps/unix/sysv/linux/getcwd.c: Likewise. * sysdeps/unix/sysv/linux/getdents.c: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Likewise. * sysdeps/unix/sysv/linux/i386/fchown.c: Likewise. * sysdeps/unix/sysv/linux/i386/fchownat.c: Likewise. * sysdeps/unix/sysv/linux/i386/fcntl.c: Likewise. * sysdeps/unix/sysv/linux/i386/fxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/fxstatat.c: Likewise. * sysdeps/unix/sysv/linux/i386/getegid.c: Likewise. * sysdeps/unix/sysv/linux/i386/geteuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/getgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/getresgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/getresuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/getrlimit.c: Likewise. * sysdeps/unix/sysv/linux/i386/getuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/lchown.c: Likewise. * sysdeps/unix/sysv/linux/i386/lockf64.c: Likewise. * sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/mmap.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/i386/msgctl.c: Likewise. * sysdeps/unix/sysv/linux/i386/posix_fadvise64.S: Likewise. * sysdeps/unix/sysv/linux/i386/semctl.c: Likewise. * sysdeps/unix/sysv/linux/i386/setegid.c: Likewise. * sysdeps/unix/sysv/linux/i386/seteuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setfsgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setfsuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setgroups.c: Likewise. * sysdeps/unix/sysv/linux/i386/setregid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setreuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setrlimit.c: Likewise. * sysdeps/unix/sysv/linux/i386/setuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/shmctl.c: Likewise. * sysdeps/unix/sysv/linux/i386/xstat.c: Likewise. * sysdeps/unix/sysv/linux/ifreq.c: Likewise. * sysdeps/unix/sysv/linux/ldsodefs.h: Likewise. * sysdeps/unix/sysv/linux/lxstat64.c: Likewise. * sysdeps/unix/sysv/linux/m68k/chown.c: Likewise. * sysdeps/unix/sysv/linux/m68k/fchownat.c: Likewise. * sysdeps/unix/sysv/linux/mips/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/mips/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mmap64.c: Likewise. * sysdeps/unix/sysv/linux/msgctl.c: Likewise. * sysdeps/unix/sysv/linux/netlinkaccess.h: Likewise. * sysdeps/unix/sysv/linux/opendir.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fe_nomask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: Likewise. * sysdeps/unix/sysv/linux/pread.c: Likewise. * sysdeps/unix/sysv/linux/pread64.c: Likewise. * sysdeps/unix/sysv/linux/prof-freq.c: Likewise. * sysdeps/unix/sysv/linux/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/chown.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/lchown.c: Likewise. * sysdeps/unix/sysv/linux/semctl.c: Likewise. * sysdeps/unix/sysv/linux/setegid.c: Likewise. * sysdeps/unix/sysv/linux/seteuid.c: Likewise. * sysdeps/unix/sysv/linux/shmctl.c: Likewise. * sysdeps/unix/sysv/linux/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/sigpending.c: Likewise. * sysdeps/unix/sysv/linux/sigprocmask.c: Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/semctl.c: Likewise. * sysdeps/unix/sysv/linux/statvfs64.c: Likewise. * sysdeps/unix/sysv/linux/syslog.c: Likewise. * sysdeps/unix/sysv/linux/testrtsig.h: Likewise. * sysdeps/unix/sysv/linux/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/utimes.c: Likewise. * sysdeps/unix/sysv/linux/xstat64.c: Likewise. * sysdeps/unix/sysv/linux/xstatconv.h: Likewise.
765 lines
24 KiB
ArmAsm
765 lines
24 KiB
ArmAsm
/* Save current context and install the given one.
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Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
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02110-1301 USA. */
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#include <sysdep.h>
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#include <rtld-global-offsets.h>
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#include <shlib-compat.h>
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#include <kernel-features.h>
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#define __ASSEMBLY__
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#include <asm/ptrace.h>
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#include "ucontext_i.h"
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#include <asm/errno.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
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ENTRY(__novec_swapcontext)
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CALL_MCOUNT 2
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#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
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std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
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std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
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mflr r0
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std r31,-8(1)
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std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
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std r0,FRAME_LR_SAVE(r1)
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cfi_offset (lr, FRAME_LR_SAVE)
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std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
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stdu r1,-128(r1)
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cfi_adjust_cfa_offset (128)
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std r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
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std r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
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std r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
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std r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
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std r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
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std r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
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std r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
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std r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
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std r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
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std r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
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std r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
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std r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
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std r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
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std r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
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std r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3)
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std r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3)
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std r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3)
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std r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3)
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std r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3)
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std r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3)
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std r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3)
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std r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3)
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std r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3)
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std r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3)
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std r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3)
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std r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
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std r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3)
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std r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3)
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mfctr r0
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std r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3)
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mfxer r0
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std r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3)
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mfcr r0
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std r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3)
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/* Set the return value of swapcontext to "success". R3 is the only
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register whose value is not preserved in the saved context. */
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li r0,0
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std r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3)
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/* Zero fill fields that can't be set in user state or are unused. */
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std r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(34*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(40*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(41*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(42*8))(r3)
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std r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3)
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/* Set the PT_REGS pointer to the address of sigcontext gp_regs
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field. Struct pt_regs and elf_gregset_t are the same thing.
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We kept the regs field for backwards compatibility with
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libraries built before we extended sigcontext. */
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addi r0,r3,SIGCONTEXT_GP_REGS
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std r0,SIGCONTEXT_PT_REGS(r3)
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stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3)
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stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3)
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stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3)
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stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3)
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stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3)
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stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3)
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stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3)
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stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3)
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stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3)
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stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3)
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stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3)
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stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3)
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stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3)
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stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3)
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stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3)
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stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3)
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stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3)
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stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3)
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stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3)
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stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3)
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stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3)
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stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3)
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stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3)
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stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3)
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stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3)
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stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3)
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stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3)
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stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3)
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stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3)
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stfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r3)
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mffs fp0
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stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
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stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
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stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
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mr r31,r4
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addi r5,r3,UCONTEXT_SIGMASK
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addi r4,r4,UCONTEXT_SIGMASK
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li r3,SIG_SETMASK
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bl JUMPTARGET(__sigprocmask)
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nop
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cmpdi r3,0
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bne L(nv_error_exit)
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/*
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* If this new ucontext refers to the point where we were interrupted
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* by a signal, we have to use the rt_sigreturn system call to
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* return to the context so we get both LR and CTR restored.
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*
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* Otherwise, the context we are restoring is either just after
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* a procedure call (getcontext/swapcontext) or at the beginning
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* of a procedure call (makecontext), so we don't need to restore
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* msr and ctr. We don't restore r13 since it will be used as
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* the TLS pointer. */
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ld r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
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cmpdi r0,0
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bne L(nv_do_sigret)
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lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
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lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)
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lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31)
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mtfsf 0xff,fp0
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lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31)
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lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31)
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lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31)
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lfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31)
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lfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31)
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lfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31)
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lfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31)
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lfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31)
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lfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31)
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lfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31)
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lfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31)
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lfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31)
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lfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31)
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lfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31)
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lfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31)
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lfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31)
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lfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31)
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lfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31)
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lfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31)
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lfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31)
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lfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31)
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lfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31)
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lfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31)
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lfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31)
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lfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31)
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lfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31)
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lfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31)
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lfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31)
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lfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31)
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lfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31)
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ld r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31)
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ld r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31)
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mtlr r0
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ld r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31)
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ld r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31)
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ld r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31)
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mtxer r0
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ld r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31)
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ld r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31)
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ld r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31)
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mtcr r0
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ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
|
|
ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
|
|
ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
|
|
ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
|
|
ld r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31)
|
|
ld r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31)
|
|
ld r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31)
|
|
/* Don't reload the thread ID or TLS pointer (r13). */
|
|
ld r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31)
|
|
ld r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31)
|
|
ld r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31)
|
|
ld r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31)
|
|
ld r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31)
|
|
ld r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31)
|
|
ld r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31)
|
|
ld r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31)
|
|
ld r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31)
|
|
ld r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31)
|
|
ld r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31)
|
|
ld r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31)
|
|
ld r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31)
|
|
ld r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31)
|
|
ld r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31)
|
|
ld r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31)
|
|
ld r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31)
|
|
|
|
/* Now we branch to the "Next Instruction Pointer" from the saved
|
|
context. With the powerpc64 instruction set there is no good way to
|
|
do this (from user state) without clobbering either the LR or CTR.
|
|
The makecontext and swapcontext functions depend on the callers
|
|
LR being preserved so we use the CTR. */
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31)
|
|
mtctr r0
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31)
|
|
ld r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31)
|
|
bctr
|
|
|
|
L(nv_error_exit):
|
|
ld r0,128+FRAME_LR_SAVE(r1)
|
|
addi r1,r1,128
|
|
mtlr r0
|
|
ld r31,-8(r1)
|
|
blr
|
|
|
|
/* At this point we assume that the ucontext was created by a
|
|
rt_signal and we should use rt_sigreturn to restore the original
|
|
state. As of the 2.4.21 kernel the ucontext is the first thing
|
|
(offset 0) in the rt_signal frame and rt_sigreturn expects the
|
|
ucontext address in R1. Normally the rt-signal trampoline handles
|
|
this by popping dummy frame before the rt_signal syscall. In our
|
|
case the stack may not be in its original (signal handler return with
|
|
R1 pointing at the dummy frame) state. We do have the ucontext
|
|
address in R3, so simply copy R3 to R1 before the syscall. */
|
|
L(nv_do_sigret):
|
|
mr r1,r3,
|
|
li r0,SYS_ify(rt_sigreturn)
|
|
sc
|
|
/* No return. */
|
|
#else
|
|
/* If the kernel is not at least 2.4.21 then generate a ENOSYS stub. */
|
|
mflr r0
|
|
std r0,FRAME_LR_SAVE(r1)
|
|
stdu r1,-128(r1)
|
|
li r3,ENOSYS
|
|
bl JUMPTARGET(__syscall_error)
|
|
nop
|
|
li r3,-1
|
|
ld r0,128+FRAME_LR_SAVE(r1)
|
|
addi r1,r1,128
|
|
mtlr r0
|
|
blr
|
|
#endif
|
|
|
|
PSEUDO_END(__novec_swapcontext)
|
|
|
|
compat_symbol (libc, __novec_swapcontext, swapcontext, 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(__swapcontext)
|
|
CALL_MCOUNT 2
|
|
#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 r31,-8(1)
|
|
std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
|
|
std r0,FRAME_LR_SAVE(r1)
|
|
std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
|
|
std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
|
|
stdu r1,-128(r1)
|
|
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 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 r8,.LC__dl_hwcap@toc(r2)
|
|
#ifdef SHARED
|
|
/* Load _rtld-global._dl_hwcap. */
|
|
ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8)
|
|
#else
|
|
ld r8,0(r8) /* Load extern _dl_hwcap. */
|
|
#endif
|
|
la r10,(SIGCONTEXT_V_RESERVE+8)(r3)
|
|
la r9,(SIGCONTEXT_V_RESERVE+24)(r3)
|
|
|
|
andis. r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16)
|
|
|
|
clrrdi r10,r10,4
|
|
beq L(has_no_vec)
|
|
|
|
clrrdi r9,r9,4
|
|
mr r8,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(r9)
|
|
|
|
L(has_no_vec):
|
|
/*
|
|
Store either a NULL or a quadword aligned pointer to the Vector register
|
|
array into *v_regs.
|
|
*/
|
|
std r8,(SIGCONTEXT_V_REGS_PTR)(r3)
|
|
|
|
mr r31,r4
|
|
addi r5,r3,UCONTEXT_SIGMASK
|
|
addi r4,r4,UCONTEXT_SIGMASK
|
|
li r3,SIG_SETMASK
|
|
bl JUMPTARGET(__sigprocmask)
|
|
nop
|
|
cmpdi r3,0
|
|
bne L(error_exit)
|
|
|
|
/*
|
|
* If this new ucontext refers to the point where we were interrupted
|
|
* by a signal, we have to use the rt_sigreturn system call to
|
|
* return to the context so we get both LR and CTR restored.
|
|
*
|
|
* Otherwise, the context we are restoring is either just after
|
|
* a procedure call (getcontext/swapcontext) or at the beginning
|
|
* of a procedure call (makecontext), so we don't need to restore
|
|
* msr and ctr. We don't restore r13 since it will be used as
|
|
* the TLS pointer. */
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
|
|
cmpdi r0,0
|
|
bne L(do_sigret)
|
|
|
|
ld r8,.LC__dl_hwcap@toc(r2)
|
|
ld r10,(SIGCONTEXT_V_REGS_PTR)(r31)
|
|
# ifdef SHARED
|
|
/* Load _rtld-global._dl_hwcap. */
|
|
ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8)
|
|
# else
|
|
ld r8,0(r8) /* Load extern _dl_hwcap. */
|
|
# endif
|
|
andis. r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16)
|
|
beq L(has_no_vec2)
|
|
|
|
cmpdi r10,0
|
|
beq L(has_no_vec2)
|
|
lwz r0,(33*16)(r10)
|
|
|
|
li r9,(16*32)
|
|
mtspr VRSAVE,r0
|
|
cmpwi r0,0
|
|
beq L(has_no_vec2)
|
|
|
|
lvx v19,r9,r10
|
|
la r9,(16)(r10)
|
|
|
|
lvx v0,0,r10
|
|
lvx v1,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
mtvscr v19
|
|
lvx v2,0,r10
|
|
lvx v3,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v4,0,r10
|
|
lvx v5,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v6,0,r10
|
|
lvx v7,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v8,0,r10
|
|
lvx v9,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v10,0,r10
|
|
lvx v11,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v12,0,r10
|
|
lvx v13,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v14,0,r10
|
|
lvx v15,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v16,0,r10
|
|
lvx v17,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v18,0,r10
|
|
lvx v19,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v20,0,r10
|
|
lvx v21,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v22,0,r10
|
|
lvx v23,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v24,0,r10
|
|
lvx v25,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v26,0,r10
|
|
lvx v27,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v28,0,r10
|
|
lvx v29,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v30,0,r10
|
|
lvx v31,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
lvx v10,0,r10
|
|
lvx v11,0,r9
|
|
addi r10,r10,32
|
|
addi r9,r9,32
|
|
|
|
L(has_no_vec2):
|
|
|
|
lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
|
|
lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)
|
|
lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31)
|
|
mtfsf 0xff,fp0
|
|
lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31)
|
|
lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31)
|
|
lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31)
|
|
lfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31)
|
|
lfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31)
|
|
lfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31)
|
|
lfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31)
|
|
lfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31)
|
|
lfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31)
|
|
lfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31)
|
|
lfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31)
|
|
lfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31)
|
|
lfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31)
|
|
lfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31)
|
|
lfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31)
|
|
lfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31)
|
|
lfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31)
|
|
lfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31)
|
|
lfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31)
|
|
lfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31)
|
|
lfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31)
|
|
lfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31)
|
|
lfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31)
|
|
lfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31)
|
|
lfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31)
|
|
lfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31)
|
|
lfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31)
|
|
lfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31)
|
|
lfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31)
|
|
lfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31)
|
|
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31)
|
|
ld r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31)
|
|
mtlr r0
|
|
ld r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31)
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31)
|
|
ld r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31)
|
|
mtxer r0
|
|
ld r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31)
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31)
|
|
ld r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31)
|
|
ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
|
|
ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
|
|
ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
|
|
ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
|
|
mtcr r0
|
|
ld r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31)
|
|
ld r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31)
|
|
ld r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31)
|
|
/* Don't reload the thread ID or TLS pointer (r13). */
|
|
ld r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31)
|
|
ld r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31)
|
|
ld r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31)
|
|
ld r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31)
|
|
ld r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31)
|
|
ld r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31)
|
|
ld r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31)
|
|
ld r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31)
|
|
ld r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31)
|
|
ld r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31)
|
|
ld r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31)
|
|
ld r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31)
|
|
ld r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31)
|
|
ld r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31)
|
|
ld r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31)
|
|
ld r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31)
|
|
ld r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31)
|
|
|
|
/* Now we branch to the "Next Instruction Pointer" from the saved
|
|
context. With the powerpc64 instruction set there is no good way to
|
|
do this (from user state) without clobbering either the LR or CTR.
|
|
The makecontext and swapcontext functions depend on the callers
|
|
LR being preserved so we use the CTR. */
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31)
|
|
mtctr r0
|
|
ld r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31)
|
|
ld r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31)
|
|
bctr
|
|
|
|
L(error_exit):
|
|
ld r0,128+FRAME_LR_SAVE(r1)
|
|
addi r1,r1,128
|
|
mtlr r0
|
|
ld r31,-8(r1)
|
|
blr
|
|
|
|
/* At this point we assume that the ucontext was created by a
|
|
rt_signal and we should use rt_sigreturn to restore the original
|
|
state. As of the 2.4.21 kernel the ucontext is the first thing
|
|
(offset 0) in the rt_signal frame and rt_sigreturn expects the
|
|
ucontext address in R1. Normally the rt-signal trampoline handles
|
|
this by popping dummy frame before the rt_signal syscall. In our
|
|
case the stack may not be in its original (signal handler return with
|
|
R1 pointing at the dummy frame) state. We do have the ucontext
|
|
address in R3, so simply copy R3 to R1 before the syscall. */
|
|
L(do_sigret):
|
|
mr r1,r3,
|
|
li r0,SYS_ify(rt_sigreturn)
|
|
sc
|
|
/* No return. */
|
|
#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
|
|
ld r0,128+FRAME_LR_SAVE(r1)
|
|
addi r1,r1,128
|
|
mtlr r0
|
|
blr
|
|
#endif
|
|
|
|
PSEUDO_END(__swapcontext)
|
|
|
|
versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
|