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d980f41a7e
* sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: Use __sigprocmask not sigprocmask. * sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: Likewise.
457 lines
14 KiB
ArmAsm
457 lines
14 KiB
ArmAsm
/* Switch to context.
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Copyright (C) 2002, 2004 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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_setcontext)
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#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
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mflr r0
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std r31,-8(1)
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std r0,FRAME_LR_SAVE(r1)
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stdu r1,-128(r1)
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mr r31,r3
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/*
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* If this 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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lwz 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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li r5,0
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addi r4,r3,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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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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mfcr r0
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ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
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ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
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ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
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ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
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ld r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31)
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ld r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31)
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ld r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31)
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/* Don't reload the thread ID or TLS pointer (r13). */
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ld r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31)
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ld r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31)
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ld r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31)
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ld r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31)
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ld r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31)
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ld r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31)
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ld r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31)
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ld r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31)
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ld r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31)
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ld r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31)
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ld r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31)
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ld r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31)
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ld r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31)
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ld r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31)
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ld r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31)
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ld r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31)
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ld r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31)
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/* Now we branch to the "Next Instruction Pointer" from the saved
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context. With the powerpc64 instruction set there is no good way to
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do this (from user state) without clobbering either the LR or CTR.
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The makecontext and swapcontext functions depend on the callers
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LR being preserved so we use the CTR. */
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ld r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31)
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mtctr r0
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ld r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31)
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ld r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31)
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bctr
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L(nv_error_exit):
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ld r0,128+FRAME_LR_SAVE(r1)
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addi r1,r1,128
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mtlr r0
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ld r31,-8(r1)
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blr
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/* At this point we assume that the ucontext was created by a
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rt_signal and we should use rt_sigreturn to restore the original
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state. As of the 2.4.21 kernel the ucontext is the first thing
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(offset 0) in the rt_signal frame and rt_sigreturn expects the
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ucontext address in R1. Normally the rt-signal trampoline handles
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this by popping dummy frame before the rt_signal syscall. In our
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case the stack may not be in its original (signal handler return with
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R1 pointing at the dummy frame) state. We do have the ucontext
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address in R3, so simply copy R3 to R1 before the syscall. */
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L(nv_do_sigret):
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mr r1,r3,
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li r0,SYS_ify(rt_sigreturn)
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sc
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/* No return. */
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#else
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/* If the kernel is not at least 2.4.21 then generate a ENOSYS stub. */
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mflr r0
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std r0,FRAME_LR_SAVE(r1)
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stdu r1,-128(r1)
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li r3,ENOSYS
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bl JUMPTARGET(__syscall_error)
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nop
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li r3,-1
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ld r0,128+FRAME_LR_SAVE(r1)
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addi r1,r1,128
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mtlr r0
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blr
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#endif
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PSEUDO_END(__novec_setcontext)
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compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3)
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#endif
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.section ".toc","aw"
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.LC__dl_hwcap:
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#ifdef SHARED
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.tc _rtld_global_ro[TC],_rtld_global_ro
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#else
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.tc _dl_hwcap[TC],_dl_hwcap
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#endif
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.section ".text"
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ENTRY(__setcontext)
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#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
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mflr r0
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std r31,-8(1)
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std r0,FRAME_LR_SAVE(r1)
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stdu r1,-128(r1)
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mr r31,r3
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/*
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* If this 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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lwz r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
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cmpdi r0,0
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bne L(do_sigret)
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li r5,0
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addi r4,r3,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(error_exit)
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ld r5,.LC__dl_hwcap@toc(r2)
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ld r10,(SIGCONTEXT_V_REGS_PTR)(r31)
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# ifdef SHARED
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/* Load _rtld-global._dl_hwcap. */
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ld r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r5)
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# else
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ld r5,0(r5) /* Load extern _dl_hwcap. */
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# endif
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andis. r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16)
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beq L(has_no_vec)
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cmpdi r10,0
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beq L(has_no_vec)
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lwz r0,(33*16)(r10)
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li r9,(16*32)
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mtspr VRSAVE,r0
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cmpwi r0,0
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beq L(has_no_vec)
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lvx v19,r9,r10
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la r9,(16)(r10)
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lvx v0,0,r10
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lvx v1,0,r9
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addi r10,r10,32
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addi r9,r9,32
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mtvscr v19
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lvx v2,0,r10
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lvx v3,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v4,0,r10
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lvx v5,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v6,0,r10
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lvx v7,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v8,0,r10
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lvx v9,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v10,0,r10
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lvx v11,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v12,0,r10
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lvx v13,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v14,0,r10
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lvx v15,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v16,0,r10
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lvx v17,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v18,0,r10
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lvx v11,0,r9
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addi r19,r10,32
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addi r9,r9,32
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lvx v20,0,r10
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lvx v21,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v22,0,r10
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lvx v23,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v24,0,r10
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lvx v25,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v26,0,r10
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lvx v27,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v28,0,r10
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lvx v29,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v30,0,r10
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lvx v31,0,r9
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addi r10,r10,32
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addi r9,r9,32
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lvx v10,0,r10
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lvx v11,0,r9
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addi r10,r10,32
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addi r9,r9,32
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L(has_no_vec):
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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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mfcr r0
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ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
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ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
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ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
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ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
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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)
|
|
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(__setcontext)
|
|
|
|
versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4)
|