diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S | 253 |
1 files changed, 249 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S index deb946137d..cb2779731e 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S @@ -1,5 +1,5 @@ /* Jump to a new 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 +18,7 @@ 02111-1307 USA. */ #include <sysdep.h> +#include <rtld-global-offsets.h> #include <shlib-compat.h> #define __ASSEMBLY__ @@ -53,7 +54,122 @@ ENTRY(__setcontext) bl JUMPTARGET(sigprocmask) cmpwi r3,0 bne L(error_exit) + +#ifdef PIC + mflr r8 + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r7 +#ifdef SHARED + lwz r7,_rtld_global@got(r7) + mtlr r8 + lwz r7,RTLD_GLOBAL_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)(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 v11,0,r9 + addi r19,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) @@ -147,9 +263,138 @@ L(do_sigret): PSEUDO_END (__setcontext) -versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_3) +versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4) + +#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4) + +ENTRY(__novec_setcontext) + mflr r0 + stwu r1,-16(r1) + stw r0,20(r1) + stw r31,12(r1) + lwz r31,_UC_REGS_PTR(r3) + + /* + * If this 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 r0,_UC_GREGS+(PT_MSR*4)(r31) + cmpwi r0,0 + bne L(novec_do_sigret) + + /* Restore the signal mask */ + li r5,0 + addi r4,r3,_UC_SIGMASK + li r3,SIG_SETMASK + bl JUMPTARGET(sigprocmask) + cmpwi r3,0 + bne L(novec_error_exit) + + /* 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 + +L(novec_do_sigret): + addi r1,r3,-0xd0 + li r0,SYS_ify(rt_sigreturn) + sc + /* NOTREACHED */ + +PSEUDO_END (__setcontext) + +compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3_3) + +#endif -#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3) +#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) #define _ERRNO_H 1 #include <bits/errno.h> @@ -159,6 +404,6 @@ ENTRY (__setcontext_stub) b JUMPTARGET(__syscall_error) END (__setcontext_stub) -compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0) +compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_1) #endif |