diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S | 260 |
1 files changed, 257 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S index 0ebf2d8727..279a36d68d 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S @@ -1,5 +1,5 @@ /* Save current context. - Copyright (C) 2002 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 @@ -18,6 +18,8 @@ 02111-1307 USA. */ #include <sysdep.h> +#include <rtld-global-offsets.h> +#include <shlib-compat.h> #include "kernel-features.h" #define __ASSEMBLY__ @@ -25,7 +27,9 @@ #include <asm/errno.h> #include "ucontext_i.h" -ENTRY(__getcontext) + +#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4) +ENTRY(__novec_getcontext) #ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3) std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3) @@ -146,6 +150,256 @@ ENTRY(__getcontext) addi r1,r1,128 mtlr r0 blr +PSEUDO_END(__novec_getcontext) + +compat_symbol (libc, __novec_getcontext, getcontext, GLIBC_2_3) + +#endif + + .section ".toc","aw" +.LC__dl_hwcap: +#ifdef SHARED + .tc _rtld_global[TC],_rtld_global +#else + .tc _dl_hwcap[TC],_dl_hwcap +#endif + .section ".text" + +ENTRY(__getcontext) +#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL + std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3) + std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3) + mflr r0 + std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3) + std r0,FRAME_LR_SAVE(r1) + 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's gp_regs + field. Struct pt_regs and elf_gregset_t are the same thing. + We kept the regs field for backwards compatibility with + libraries built before we extended sigcontext. */ + addi r0,r3,SIGCONTEXT_GP_REGS + std r0,SIGCONTEXT_PT_REGS(r3) + + stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3) + stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3) + stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3) + stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3) + stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3) + stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3) + stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3) + stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3) + stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3) + stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3) + stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3) + stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3) + stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3) + stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3) + stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3) + stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3) + stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3) + stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3) + stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3) + stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3) + stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3) + stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3) + stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3) + stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3) + stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3) + stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3) + stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3) + stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3) + stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3) + stfd fp29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3) + mffs fp0 + stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3) + stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3) + stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3) + + ld r5,.LC__dl_hwcap@toc(r2) + li r10,0 +#ifdef SHARED +/* Load _rtld-global._dl_hwcap. */ + ld r5,RTLD_GLOBAL_DL_HWCAP_OFFSET(r5) +#else + ld r5,0(r5) /* Load extern _dl_hwcap. */ +#endif + andis. r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16) + beq L(has_no_vec) + + la r10,(SIGCONTEXT_V_RESERVE+8)(r3) + la r9,(SIGCONTEXT_V_RESERVE+24)(r3) + clrrdi r10,r10,4 + clrrdi r9,r9,4 + + 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 v11,0,r9 + addi r19,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 + + stvx v10,0,r10 + stvx v11,0,r9 + addi r10,r10,32 + addi r9,r9,32 + + mfvscr v0 + mfspr r0,VRSAVE + stvx v0,0,r10 + stw r0,0(9) + +L(has_no_vec): +/* + Store either a NULL or a quadword aligned pointer to the Vector register + array into *v_regs. +*/ + std r10,(SIGCONTEXT_V_REGS_PTR)(r3) + + addi r5,r3,UCONTEXT_SIGMASK + li r4,0 + li r3,SIG_BLOCK + bl JUMPTARGET(sigprocmask) + nop +#else + /* If the kernel is not at least 2.4.21 then generate a ENOSYS stub. */ + mflr r0 + std r0,FRAME_LR_SAVE(r1) + stdu r1,-128(r1) + li r3,ENOSYS + bl JUMPTARGET(__syscall_error) + nop + li r3,-1 +#endif + + ld r0,128+FRAME_LR_SAVE(r1) + addi r1,r1,128 + mtlr r0 + blr PSEUDO_END(__getcontext) -weak_alias(__getcontext, getcontext) +versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_4) + |