diff options
author | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:10:10 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:10:10 +0000 |
commit | a334319f6530564d22e775935d9c91663623a1b4 (patch) | |
tree | b5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S | |
parent | 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff) | |
download | glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.gz glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.xz glibc-a334319f6530564d22e775935d9c91663623a1b4.zip |
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S | 695 |
1 files changed, 663 insertions, 32 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S index 0605f3d107..c4f0faddc3 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S @@ -1,5 +1,5 @@ /* Save current context and jump to a new context. - Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2002, 2004 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 @@ -14,53 +14,684 @@ You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA - 02110-1301 USA. */ + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #include <sysdep.h> #include <rtld-global-offsets.h> #include <shlib-compat.h> -#include <kernel-features.h> #define __ASSEMBLY__ #include <asm/ptrace.h> #include "ucontext_i.h" -#define __CONTEXT_FUNC_NAME __swapcontext -#define __CONTEXT_ENABLE_FPRS 1 -#define __CONTEXT_ENABLE_VRS 1 - -/* Size of ucontext in GLIBC_2.3.4 and later. */ -#define _UC_SIZE_2_3_4 1184 - -#ifdef __ASSUME_SWAPCONTEXT_SYSCALL - .section ".text"; -ENTRY (__swapcontext) - li r5,_UC_SIZE_2_3_4; - DO_CALL (SYS_ify (swapcontext)); - bso- cr0,1f -/* the kernel does not set the return code for the success case */ - li r3,0 - blr -1: - b __syscall_error@local -END(__swapcontext) + .machine "altivec" +ENTRY(__swapcontext) + stwu r1,-16(r1) +/* Insure that the _UC_REGS start on a quadword boundary. */ + stw r3,_FRAME_PARM_SAVE1(r1) + addi r3,r3,_UC_REG_SPACE+12 + stw r4,_FRAME_PARM_SAVE2(r1) /* new context pointer */ + clrrwi r3,r3,4 + +/* Save the general purpose registers */ + stw r0,_UC_GREGS+(PT_R0*4)(r3) + mflr r0 + stw r2,_UC_GREGS+(PT_R2*4)(r3) + stw r4,_UC_GREGS+(PT_R4*4)(r3) +/* Set the callers LR_SAVE, and the ucontext LR and NIP to the callers + return address. */ + stw r0,_UC_GREGS+(PT_LNK*4)(r3) + stw r0,_UC_GREGS+(PT_NIP*4)(r3) + stw r0,_FRAME_LR_SAVE+16(r1) + stw r5,_UC_GREGS+(PT_R5*4)(r3) + stw r6,_UC_GREGS+(PT_R6*4)(r3) + stw r7,_UC_GREGS+(PT_R7*4)(r3) + stw r8,_UC_GREGS+(PT_R8*4)(r3) + stw r9,_UC_GREGS+(PT_R9*4)(r3) + stw r10,_UC_GREGS+(PT_R10*4)(r3) + stw r11,_UC_GREGS+(PT_R11*4)(r3) + stw r12,_UC_GREGS+(PT_R12*4)(r3) + stw r13,_UC_GREGS+(PT_R13*4)(r3) + stw r14,_UC_GREGS+(PT_R14*4)(r3) + stw r15,_UC_GREGS+(PT_R15*4)(r3) + stw r16,_UC_GREGS+(PT_R16*4)(r3) + stw r17,_UC_GREGS+(PT_R17*4)(r3) + stw r18,_UC_GREGS+(PT_R18*4)(r3) + stw r19,_UC_GREGS+(PT_R19*4)(r3) + stw r20,_UC_GREGS+(PT_R20*4)(r3) + stw r21,_UC_GREGS+(PT_R21*4)(r3) + stw r22,_UC_GREGS+(PT_R22*4)(r3) + stw r23,_UC_GREGS+(PT_R23*4)(r3) + stw r24,_UC_GREGS+(PT_R24*4)(r3) + stw r25,_UC_GREGS+(PT_R25*4)(r3) + stw r26,_UC_GREGS+(PT_R26*4)(r3) + stw r27,_UC_GREGS+(PT_R27*4)(r3) + stw r28,_UC_GREGS+(PT_R28*4)(r3) + stw r29,_UC_GREGS+(PT_R29*4)(r3) + stw r30,_UC_GREGS+(PT_R30*4)(r3) + stw r31,_UC_GREGS+(PT_R31*4)(r3) + +/* Save the value of R1. We had to push the stack before we + had the address of uc_reg_space. So compute the address of + the callers stack pointer and save it as R1. */ + addi r8,r1,16 + li r0,0 +/* Save the count, exception and condition registers. */ + mfctr r11 + mfxer r10 + mfcr r9 + stw r8,_UC_GREGS+(PT_R1*4)(r3) + stw r11,_UC_GREGS+(PT_CTR*4)(r3) + stw r10,_UC_GREGS+(PT_XER*4)(r3) + stw r9,_UC_GREGS+(PT_CCR*4)(r3) +/* Set the return value of getcontext to "success". R3 is the only + register whose value is not preserved in the saved context. */ + stw r0,_UC_GREGS+(PT_R3*4)(r3) + + /* Zero fill fields that can't be set in user state. */ + stw r0,_UC_GREGS+(PT_MSR*4)(r3) + stw r0,_UC_GREGS+(PT_MQ*4)(r3) + + /* Save the floating-point registers */ + stfd fp0,_UC_FREGS+(0*8)(r3) + stfd fp1,_UC_FREGS+(1*8)(r3) + stfd fp2,_UC_FREGS+(2*8)(r3) + stfd fp3,_UC_FREGS+(3*8)(r3) + stfd fp4,_UC_FREGS+(4*8)(r3) + stfd fp5,_UC_FREGS+(5*8)(r3) + stfd fp6,_UC_FREGS+(6*8)(r3) + stfd fp7,_UC_FREGS+(7*8)(r3) + stfd fp8,_UC_FREGS+(8*8)(r3) + stfd fp9,_UC_FREGS+(9*8)(r3) + stfd fp10,_UC_FREGS+(10*8)(r3) + stfd fp11,_UC_FREGS+(11*8)(r3) + stfd fp12,_UC_FREGS+(12*8)(r3) + stfd fp13,_UC_FREGS+(13*8)(r3) + stfd fp14,_UC_FREGS+(14*8)(r3) + stfd fp15,_UC_FREGS+(15*8)(r3) + stfd fp16,_UC_FREGS+(16*8)(r3) + stfd fp17,_UC_FREGS+(17*8)(r3) + stfd fp18,_UC_FREGS+(18*8)(r3) + stfd fp19,_UC_FREGS+(19*8)(r3) + stfd fp20,_UC_FREGS+(20*8)(r3) + stfd fp21,_UC_FREGS+(21*8)(r3) + stfd fp22,_UC_FREGS+(22*8)(r3) + stfd fp23,_UC_FREGS+(23*8)(r3) + stfd fp24,_UC_FREGS+(24*8)(r3) + stfd fp25,_UC_FREGS+(25*8)(r3) + stfd fp26,_UC_FREGS+(26*8)(r3) + stfd fp27,_UC_FREGS+(27*8)(r3) + stfd fp28,_UC_FREGS+(28*8)(r3) + stfd fp29,_UC_FREGS+(29*8)(r3) + mffs fp0 + stfd fp30,_UC_FREGS+(30*8)(r3) + stfd fp31,_UC_FREGS+(31*8)(r3) + stfd fp0,_UC_FREGS+(32*8)(r3) +#ifdef PIC + mflr r8 + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r7 +# ifdef SHARED + lwz r7,_rtld_global_ro@got(r7) + mtlr r8 + lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r7) +# else + lwz r7,_dl_hwcap@got(r7) + mtlr r8 + lwz r7,0(r7) +# endif +#else + lis r7,_dl_hwcap@ha + lwz r7,_dl_hwcap@l(r7) +#endif + andis. r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16) + + la r10,(_UC_VREGS)(r3) + la r9,(_UC_VREGS+16)(r3) + + beq L(no_vec) +/* address of the combined VSCR/VSAVE quadword. */ + la r8,(_UC_VREGS+512)(r3) + +/* Save the vector registers */ + stvx v0,0,r10 + stvx v1,0,r9 + addi r10,r10,32 + addi r9,r9,32 +/* We need to get the Vector Status and Control Register early to avoid + store order problems later with the VSAVE register that shares the + same quadword. */ + mfvscr v0 + + stvx v2,0,r10 + stvx v3,0,r9 + addi r10,r10,32 + addi r9,r9,32 + + stvx v0,0,r8 + + 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 + + mfvscr v0 + stvx v30,0,r10 + stvx v31,0,r9 + + stw r0,0(r8) + +L(no_vec): +/* Restore ucontext (parm1) from stack. */ + lwz r12,_FRAME_PARM_SAVE1(r1) + li r4,0 + stw r3,_UC_REGS_PTR(r12) + addi r5,r12,_UC_SIGMASK + li r3,SIG_SETMASK + bl JUMPTARGET(__sigprocmask) + cmpwi r3,0 + bne L(error_exit) + + /* + * If the 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 + * r0, xer, ctr. We don't restore r2 since it will be used as + * the TLS pointer. + */ + lwz r4,_FRAME_PARM_SAVE2(r1) + lwz r31,_UC_REGS_PTR(r4) + lwz r0,_UC_GREGS+(PT_MSR*4)(r31) + cmpwi r0,0 + bne L(do_sigret) + +#ifdef PIC + mflr r8 + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r7 +# ifdef SHARED + lwz r7,_rtld_global_ro@got(r7) + mtlr r8 + lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r7) +# else + lwz r7,_dl_hwcap@got(r7) + mtlr r8 + lwz r7,0(r7) +# endif #else -# include "swapcontext-common.S" + lis r7,_dl_hwcap@ha + lwz r7,_dl_hwcap@l(r7) #endif + andis. r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16) + la r10,(_UC_VREGS)(r31) + beq L(has_no_vec) + + lwz r0,(32*16)(r10) + li r9,(32*16) + cmpwi r0,0 + mtspr VRSAVE,r0 + beq L(has_no_vec) + + 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 + +L(has_no_vec): + /* Restore the floating-point registers */ + lfd fp31,_UC_FREGS+(32*8)(r31) + lfd fp0,_UC_FREGS+(0*8)(r31) + mtfsf 0xff,fp31 + lfd fp1,_UC_FREGS+(1*8)(r31) + lfd fp2,_UC_FREGS+(2*8)(r31) + lfd fp3,_UC_FREGS+(3*8)(r31) + lfd fp4,_UC_FREGS+(4*8)(r31) + lfd fp5,_UC_FREGS+(5*8)(r31) + lfd fp6,_UC_FREGS+(6*8)(r31) + lfd fp7,_UC_FREGS+(7*8)(r31) + lfd fp8,_UC_FREGS+(8*8)(r31) + lfd fp9,_UC_FREGS+(9*8)(r31) + lfd fp10,_UC_FREGS+(10*8)(r31) + lfd fp11,_UC_FREGS+(11*8)(r31) + lfd fp12,_UC_FREGS+(12*8)(r31) + lfd fp13,_UC_FREGS+(13*8)(r31) + lfd fp14,_UC_FREGS+(14*8)(r31) + lfd fp15,_UC_FREGS+(15*8)(r31) + lfd fp16,_UC_FREGS+(16*8)(r31) + lfd fp17,_UC_FREGS+(17*8)(r31) + lfd fp18,_UC_FREGS+(18*8)(r31) + lfd fp19,_UC_FREGS+(19*8)(r31) + lfd fp20,_UC_FREGS+(20*8)(r31) + lfd fp21,_UC_FREGS+(21*8)(r31) + lfd fp22,_UC_FREGS+(22*8)(r31) + lfd fp23,_UC_FREGS+(23*8)(r31) + lfd fp24,_UC_FREGS+(24*8)(r31) + lfd fp25,_UC_FREGS+(25*8)(r31) + lfd fp26,_UC_FREGS+(26*8)(r31) + lfd fp27,_UC_FREGS+(27*8)(r31) + lfd fp28,_UC_FREGS+(28*8)(r31) + lfd fp29,_UC_FREGS+(29*8)(r31) + lfd fp30,_UC_FREGS+(30*8)(r31) + lfd fp31,_UC_FREGS+(31*8)(r31) + + /* Restore LR and CCR, and set CTR to the NIP value */ + lwz r3,_UC_GREGS+(PT_LNK*4)(r31) + lwz r4,_UC_GREGS+(PT_NIP*4)(r31) + lwz r5,_UC_GREGS+(PT_CCR*4)(r31) + mtlr r3 + mtctr r4 + mtcr r5 + + /* Restore the general registers */ + lwz r1,_UC_GREGS+(PT_R1*4)(r31) + lwz r3,_UC_GREGS+(PT_R3*4)(r31) + lwz r4,_UC_GREGS+(PT_R4*4)(r31) + lwz r5,_UC_GREGS+(PT_R5*4)(r31) + lwz r6,_UC_GREGS+(PT_R6*4)(r31) + lwz r7,_UC_GREGS+(PT_R7*4)(r31) + lwz r8,_UC_GREGS+(PT_R8*4)(r31) + lwz r9,_UC_GREGS+(PT_R9*4)(r31) + lwz r10,_UC_GREGS+(PT_R10*4)(r31) + lwz r11,_UC_GREGS+(PT_R11*4)(r31) + lwz r12,_UC_GREGS+(PT_R12*4)(r31) + lwz r13,_UC_GREGS+(PT_R13*4)(r31) + lwz r14,_UC_GREGS+(PT_R14*4)(r31) + lwz r15,_UC_GREGS+(PT_R15*4)(r31) + lwz r16,_UC_GREGS+(PT_R16*4)(r31) + lwz r17,_UC_GREGS+(PT_R17*4)(r31) + lwz r18,_UC_GREGS+(PT_R18*4)(r31) + lwz r19,_UC_GREGS+(PT_R19*4)(r31) + lwz r20,_UC_GREGS+(PT_R20*4)(r31) + lwz r21,_UC_GREGS+(PT_R21*4)(r31) + lwz r22,_UC_GREGS+(PT_R22*4)(r31) + lwz r23,_UC_GREGS+(PT_R23*4)(r31) + lwz r24,_UC_GREGS+(PT_R24*4)(r31) + lwz r25,_UC_GREGS+(PT_R25*4)(r31) + lwz r26,_UC_GREGS+(PT_R26*4)(r31) + lwz r27,_UC_GREGS+(PT_R27*4)(r31) + lwz r28,_UC_GREGS+(PT_R28*4)(r31) + lwz r29,_UC_GREGS+(PT_R29*4)(r31) + lwz r30,_UC_GREGS+(PT_R30*4)(r31) + lwz r31,_UC_GREGS+(PT_R31*4)(r31) + + bctr + +L(error_exit): + lwz r0,_FRAME_LR_SAVE+16(r1) + addi r1,r1,16 + mtlr r0 + blr + +L(do_sigret): + addi r1,r4,-0xd0 + li r0,SYS_ify(rt_sigreturn) + sc + /* NOTREACHED */ + +END(__swapcontext) versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4) #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4) compat_text_section - -# undef __CONTEXT_FUNC_NAME -# define __CONTEXT_FUNC_NAME __novec_swapcontext -# undef __CONTEXT_ENABLE_VRS +ENTRY(__novec_swapcontext) + /* Save the current context */ + addi r3,r3,_UC_REG_SPACE + stw r3,_UC_REGS_PTR - _UC_REG_SPACE(r3) + stw r0,_UC_GREGS+(PT_R0*4)(r3) + stw r1,_UC_GREGS+(PT_R1*4)(r3) + mflr r0 + stwu r1,-16(r1) + stw r0,20(r1) + stw r31,12(r1) + stw r31,_UC_GREGS+(PT_R31*4)(r3) + mr r31,r4 /* new context pointer */ + stw r0,_UC_GREGS+(PT_LNK*4)(r3) + stw r0,_UC_GREGS+(PT_NIP*4)(r3) + stw r2,_UC_GREGS+(PT_R2*4)(r3) + stw r4,_UC_GREGS+(PT_R4*4)(r3) + stw r5,_UC_GREGS+(PT_R5*4)(r3) + stw r6,_UC_GREGS+(PT_R6*4)(r3) + stw r7,_UC_GREGS+(PT_R7*4)(r3) + stw r8,_UC_GREGS+(PT_R8*4)(r3) + stw r9,_UC_GREGS+(PT_R9*4)(r3) + stw r10,_UC_GREGS+(PT_R10*4)(r3) + stw r11,_UC_GREGS+(PT_R11*4)(r3) + stw r12,_UC_GREGS+(PT_R12*4)(r3) + stw r13,_UC_GREGS+(PT_R13*4)(r3) + stw r14,_UC_GREGS+(PT_R14*4)(r3) + stw r15,_UC_GREGS+(PT_R15*4)(r3) + stw r16,_UC_GREGS+(PT_R16*4)(r3) + stw r17,_UC_GREGS+(PT_R17*4)(r3) + stw r18,_UC_GREGS+(PT_R18*4)(r3) + stw r19,_UC_GREGS+(PT_R19*4)(r3) + stw r20,_UC_GREGS+(PT_R20*4)(r3) + stw r21,_UC_GREGS+(PT_R21*4)(r3) + stw r22,_UC_GREGS+(PT_R22*4)(r3) + stw r23,_UC_GREGS+(PT_R23*4)(r3) + stw r24,_UC_GREGS+(PT_R24*4)(r3) + stw r25,_UC_GREGS+(PT_R25*4)(r3) + stw r26,_UC_GREGS+(PT_R26*4)(r3) + stw r27,_UC_GREGS+(PT_R27*4)(r3) + stw r28,_UC_GREGS+(PT_R28*4)(r3) + stw r29,_UC_GREGS+(PT_R29*4)(r3) + stw r30,_UC_GREGS+(PT_R30*4)(r3) + mfctr r0 + stw r0,_UC_GREGS+(PT_CTR*4)(r3) + mfxer r0 + stw r0,_UC_GREGS+(PT_XER*4)(r3) + mfcr r0 + stw r0,_UC_GREGS+(PT_CCR*4)(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 + stw r0,_UC_GREGS+(PT_R3*4)(r3) + + /* Zero fill fields that can't be set in user state. */ + stw r0,_UC_GREGS+(PT_MSR*4)(r3) + stw r0,_UC_GREGS+(PT_MQ*4)(r3) + + /* Save the floating-point registers */ + stfd fp0,_UC_FREGS+(0*8)(r3) + stfd fp1,_UC_FREGS+(1*8)(r3) + stfd fp2,_UC_FREGS+(2*8)(r3) + stfd fp3,_UC_FREGS+(3*8)(r3) + stfd fp4,_UC_FREGS+(4*8)(r3) + stfd fp5,_UC_FREGS+(5*8)(r3) + stfd fp6,_UC_FREGS+(6*8)(r3) + stfd fp7,_UC_FREGS+(7*8)(r3) + stfd fp8,_UC_FREGS+(8*8)(r3) + stfd fp9,_UC_FREGS+(9*8)(r3) + stfd fp10,_UC_FREGS+(10*8)(r3) + stfd fp11,_UC_FREGS+(11*8)(r3) + stfd fp12,_UC_FREGS+(12*8)(r3) + stfd fp13,_UC_FREGS+(13*8)(r3) + stfd fp14,_UC_FREGS+(14*8)(r3) + stfd fp15,_UC_FREGS+(15*8)(r3) + stfd fp16,_UC_FREGS+(16*8)(r3) + stfd fp17,_UC_FREGS+(17*8)(r3) + stfd fp18,_UC_FREGS+(18*8)(r3) + stfd fp19,_UC_FREGS+(19*8)(r3) + stfd fp20,_UC_FREGS+(20*8)(r3) + stfd fp21,_UC_FREGS+(21*8)(r3) + stfd fp22,_UC_FREGS+(22*8)(r3) + stfd fp23,_UC_FREGS+(23*8)(r3) + stfd fp24,_UC_FREGS+(24*8)(r3) + stfd fp25,_UC_FREGS+(25*8)(r3) + stfd fp26,_UC_FREGS+(26*8)(r3) + stfd fp27,_UC_FREGS+(27*8)(r3) + stfd fp28,_UC_FREGS+(28*8)(r3) + stfd fp29,_UC_FREGS+(29*8)(r3) + mffs fp0 + stfd fp30,_UC_FREGS+(30*8)(r3) + stfd fp31,_UC_FREGS+(31*8)(r3) + stfd fp0,_UC_FREGS+(32*8)(r3) + + addi r5,r3,_UC_SIGMASK - _UC_REG_SPACE + addi r4,r4,_UC_SIGMASK + li r3,SIG_SETMASK + bl JUMPTARGET(__sigprocmask) + cmpwi r3,0 + bne L(novec_error_exit) + + /* + * If the 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 + * r0, xer, ctr. We don't restore r2 since it will be used as + * the TLS pointer. + */ + mr r4,r31 + lwz r31,_UC_REGS_PTR(r31) + lwz r0,_UC_GREGS+(PT_MSR*4)(r31) + cmpwi r0,0 + bne L(novec_do_sigret) + + /* Restore the floating-point registers */ + lfd fp31,_UC_FREGS+(32*8)(r31) + lfd fp0,_UC_FREGS+(0*8)(r31) + mtfsf 0xff,fp31 + lfd fp1,_UC_FREGS+(1*8)(r31) + lfd fp2,_UC_FREGS+(2*8)(r31) + lfd fp3,_UC_FREGS+(3*8)(r31) + lfd fp4,_UC_FREGS+(4*8)(r31) + lfd fp5,_UC_FREGS+(5*8)(r31) + lfd fp6,_UC_FREGS+(6*8)(r31) + lfd fp7,_UC_FREGS+(7*8)(r31) + lfd fp8,_UC_FREGS+(8*8)(r31) + lfd fp9,_UC_FREGS+(9*8)(r31) + lfd fp10,_UC_FREGS+(10*8)(r31) + lfd fp11,_UC_FREGS+(11*8)(r31) + lfd fp12,_UC_FREGS+(12*8)(r31) + lfd fp13,_UC_FREGS+(13*8)(r31) + lfd fp14,_UC_FREGS+(14*8)(r31) + lfd fp15,_UC_FREGS+(15*8)(r31) + lfd fp16,_UC_FREGS+(16*8)(r31) + lfd fp17,_UC_FREGS+(17*8)(r31) + lfd fp18,_UC_FREGS+(18*8)(r31) + lfd fp19,_UC_FREGS+(19*8)(r31) + lfd fp20,_UC_FREGS+(20*8)(r31) + lfd fp21,_UC_FREGS+(21*8)(r31) + lfd fp22,_UC_FREGS+(22*8)(r31) + lfd fp23,_UC_FREGS+(23*8)(r31) + lfd fp24,_UC_FREGS+(24*8)(r31) + lfd fp25,_UC_FREGS+(25*8)(r31) + lfd fp26,_UC_FREGS+(26*8)(r31) + lfd fp27,_UC_FREGS+(27*8)(r31) + lfd fp28,_UC_FREGS+(28*8)(r31) + lfd fp29,_UC_FREGS+(29*8)(r31) + lfd fp30,_UC_FREGS+(30*8)(r31) + lfd fp31,_UC_FREGS+(31*8)(r31) + + /* Restore LR and CCR, and set CTR to the NIP value */ + lwz r3,_UC_GREGS+(PT_LNK*4)(r31) + lwz r4,_UC_GREGS+(PT_NIP*4)(r31) + lwz r5,_UC_GREGS+(PT_CCR*4)(r31) + mtlr r3 + mtctr r4 + mtcr r5 + + /* Restore the general registers */ + lwz r1,_UC_GREGS+(PT_R1*4)(r31) + lwz r3,_UC_GREGS+(PT_R3*4)(r31) + lwz r4,_UC_GREGS+(PT_R4*4)(r31) + lwz r5,_UC_GREGS+(PT_R5*4)(r31) + lwz r6,_UC_GREGS+(PT_R6*4)(r31) + lwz r7,_UC_GREGS+(PT_R7*4)(r31) + lwz r8,_UC_GREGS+(PT_R8*4)(r31) + lwz r9,_UC_GREGS+(PT_R9*4)(r31) + lwz r10,_UC_GREGS+(PT_R10*4)(r31) + lwz r11,_UC_GREGS+(PT_R11*4)(r31) + lwz r12,_UC_GREGS+(PT_R12*4)(r31) + lwz r13,_UC_GREGS+(PT_R13*4)(r31) + lwz r14,_UC_GREGS+(PT_R14*4)(r31) + lwz r15,_UC_GREGS+(PT_R15*4)(r31) + lwz r16,_UC_GREGS+(PT_R16*4)(r31) + lwz r17,_UC_GREGS+(PT_R17*4)(r31) + lwz r18,_UC_GREGS+(PT_R18*4)(r31) + lwz r19,_UC_GREGS+(PT_R19*4)(r31) + lwz r20,_UC_GREGS+(PT_R20*4)(r31) + lwz r21,_UC_GREGS+(PT_R21*4)(r31) + lwz r22,_UC_GREGS+(PT_R22*4)(r31) + lwz r23,_UC_GREGS+(PT_R23*4)(r31) + lwz r24,_UC_GREGS+(PT_R24*4)(r31) + lwz r25,_UC_GREGS+(PT_R25*4)(r31) + lwz r26,_UC_GREGS+(PT_R26*4)(r31) + lwz r27,_UC_GREGS+(PT_R27*4)(r31) + lwz r28,_UC_GREGS+(PT_R28*4)(r31) + lwz r29,_UC_GREGS+(PT_R29*4)(r31) + lwz r30,_UC_GREGS+(PT_R30*4)(r31) + lwz r31,_UC_GREGS+(PT_R31*4)(r31) + + bctr + +L(novec_error_exit): + lwz r31,12(r1) + lwz r0,20(r1) + addi r1,r1,16 + mtlr r0 + blr -# include "swapcontext-common.S" +L(novec_do_sigret): + addi r1,r4,-0xd0 + li r0,SYS_ify(rt_sigreturn) + sc + /* NOTREACHED */ +END(__novec_swapcontext) .previous compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3) @@ -69,13 +700,13 @@ compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3) #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) -# define _ERRNO_H 1 -# include <bits/errno.h> +#define _ERRNO_H 1 +#include <bits/errno.h> compat_text_section ENTRY (__swapcontext_stub) li r3,ENOSYS - b __syscall_error@local + b JUMPTARGET(__syscall_error) END (__swapcontext_stub) .previous |