diff options
| -rw-r--r-- | ChangeLog | 21 | ||||
| -rw-r--r-- | sysdeps/generic/glob.c | 20 | ||||
| -rw-r--r-- | sysdeps/generic/sysconf.c | 11 | ||||
| -rw-r--r-- | sysdeps/posix/sysconf.c | 10 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/configure.in | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S | 138 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S | 161 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S | 162 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S | 257 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h | 47 |
10 files changed, 814 insertions, 17 deletions
@@ -1,3 +1,24 @@ +2003-01-16 Steven Munroe <sjmunroe@us.ibm.com> + + * sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: New file. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: New file. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: New file. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: New file. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h: New file. + * sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: New file. + * sysdeps/unix/sysv/linux/configure.in: Minimum kernel for PPC64 + is 2.4.21. + +2003-01-16 Ulrich Drepper <drepper@redhat.com> + + * sysdeps/generic/glob.c (glob): Assume sysconf() always returns + values != -1 for _LIBC. Use extend_alloca to reallocate alloca'ed + buffers. + + * sysdeps/generic/sysconf.c: Unconditionally implement + _SC_GETPW_R_SIZE_MAX and _SC_GETGR_R_SIZE_MAX. + * sysdeps/posix/sysconf.c: Likewise. + 2003-01-16 Jakub Jelinek <jakub@redhat.com> * posix/regcomp.c (parse_bracket_exp): If build_charclass fails, diff --git a/sysdeps/generic/glob.c b/sysdeps/generic/glob.c index 5e56629082..fa23f8cac1 100644 --- a/sysdeps/generic/glob.c +++ b/sysdeps/generic/glob.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991-1999, 2000, 2001, 2002 Free Software Foundation, Inc. +/* Copyright (C) 1991-2002, 2003 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 @@ -284,6 +284,7 @@ extern char *alloca (); #endif #ifdef _LIBC +# include <alloca.h> # undef strdup # define strdup(str) __strdup (str) # define sysconf(id) __sysconf (id) @@ -697,10 +698,12 @@ glob (pattern, flags, errfunc, pglob) struct passwd pwbuf; int save = errno; +# ifndef _LIBC if (pwbuflen == -1) /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX. Try a moderate value. */ pwbuflen = 1024; +# endif pwtmpbuf = (char *) __alloca (pwbuflen); while (getpwnam_r (name, &pwbuf, pwtmpbuf, pwbuflen, &p) @@ -711,8 +714,13 @@ glob (pattern, flags, errfunc, pglob) p = NULL; break; } +# ifdef _LIBC + pwtmpbuf = extend_alloca (pwtmpbuf, pwbuflen, + 2 * pwbuflen); +# else pwbuflen *= 2; pwtmpbuf = (char *) __alloca (pwbuflen); +# endif __set_errno (save); } # else @@ -781,10 +789,12 @@ glob (pattern, flags, errfunc, pglob) struct passwd pwbuf; int save = errno; +# ifndef _LIBC if (buflen == -1) /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX. Try a moderate value. */ buflen = 1024; +# endif pwtmpbuf = (char *) __alloca (buflen); while (getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) != 0) @@ -794,8 +804,12 @@ glob (pattern, flags, errfunc, pglob) p = NULL; break; } +# ifdef _LIBC + pwtmpbuf = extend_alloca (pwtmpbuf, buflen, 2 * buflen); +# else buflen *= 2; pwtmpbuf = __alloca (buflen); +# endif __set_errno (save); } # else @@ -1326,9 +1340,9 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob) int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0) #if defined _AMIGA || defined VMS - | FNM_CASEFOLD + | FNM_CASEFOLD #endif - ); + ); nfound = 0; flags |= GLOB_MAGCHAR; diff --git a/sysdeps/generic/sysconf.c b/sysdeps/generic/sysconf.c index f1b64d58eb..d67e3568a3 100644 --- a/sysdeps/generic/sysconf.c +++ b/sysdeps/generic/sysconf.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1991,1993,1995-1997,2001,2002 Free Software Foundation, Inc. +/* Copyright (C) 1991,1993,1995-1997,2001,2002,2003 + 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 @@ -142,6 +143,12 @@ __sysconf (name) case _SC_USHRT_MAX: return USHRT_MAX; + case _SC_GETGR_R_SIZE_MAX: + return NSS_BUFLEN_GROUP; + + case _SC_GETPW_R_SIZE_MAX: + return NSS_BUFLEN_PASSWD; + case _SC_ARG_MAX: case _SC_CHILD_MAX: case _SC_CLK_TCK: @@ -211,8 +218,6 @@ __sysconf (name) case _SC_THREADS: case _SC_THREAD_SAFE_FUNCTIONS: - case _SC_GETGR_R_SIZE_MAX: - case _SC_GETPW_R_SIZE_MAX: case _SC_LOGIN_NAME_MAX: case _SC_TTY_NAME_MAX: case _SC_THREAD_DESTRUCTOR_ITERATIONS: diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c index 3804aa1061..1700ed0b87 100644 --- a/sysdeps/posix/sysconf.c +++ b/sysdeps/posix/sysconf.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991,93,1995-1997,1999-2002 Free Software Foundation, Inc. +/* Copyright (C) 1991,93,1995-1997,1999-2003 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 @@ -509,18 +509,10 @@ __sysconf (name) #endif case _SC_GETGR_R_SIZE_MAX: -#ifdef NSS_BUFLEN_GROUP return NSS_BUFLEN_GROUP; -#else - return -1; -#endif case _SC_GETPW_R_SIZE_MAX: -#ifdef NSS_BUFLEN_PASSWD return NSS_BUFLEN_PASSWD; -#else - return -1; -#endif case _SC_LOGIN_NAME_MAX: #ifdef _POSIX_LOGIN_NAME_MAX diff --git a/sysdeps/unix/sysv/linux/configure.in b/sysdeps/unix/sysv/linux/configure.in index 30309c2948..7947743f1a 100644 --- a/sysdeps/unix/sysv/linux/configure.in +++ b/sysdeps/unix/sysv/linux/configure.in @@ -64,7 +64,7 @@ case "$machine" in arch_minimum_kernel=2.4.0 ;; hppa*) - libc_cv_gcc_unwind_find_fde=yes + libc_cv_gcc_unwind_find_fde=yes arch_minimum_kernel=2.4.19 ;; m68k*) @@ -80,7 +80,7 @@ case "$machine" in arch_minimum_kernel=2.0.10 ;; powerpc/powerpc64) - arch_minimum_kernel=2.4.19 + arch_minimum_kernel=2.4.21 ;; s390/s390-32) libc_cv_gcc_unwind_find_fde=yes diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S new file mode 100644 index 0000000000..59dfb82ef5 --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S @@ -0,0 +1,138 @@ +/* Save current context. + Copyright (C) 2002 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + 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., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + +#define __ASSEMBLY__ +#include <asm/ptrace.h> +#include "ucontext_i.h" + +ENTRY(__getcontext) + 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) + + addi r5,r3,UCONTEXT_SIGMASK + li r4,0 + li r3,SIG_BLOCK + bl .sigprocmask + nop + + ld r0,128+FRAME_LR_SAVE(r1) + addi r1,r1,128 + mtlr r0 + blr +PSEUDO_END(__getcontext) + +weak_alias(__getcontext, getcontext) diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S new file mode 100644 index 0000000000..29dd17ffe4 --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S @@ -0,0 +1,161 @@ +/* Create new context. + Copyright (C) 2002 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + 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., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + +#define __ASSEMBLY__ +#include <asm/ptrace.h> +#include "ucontext_i.h" + +ENTRY(__makecontext) + /* Save parameters into the parameter save area of callers frame. */ + std r3,FRAME_PARM1_SAVE(r1) /* ucontext_t *ucp */ + std r4,FRAME_PARM2_SAVE(r1) /* void (*func)(void) */ + std r5,FRAME_PARM3_SAVE(r1) /* int argc */ + std r6,FRAME_PARM4_SAVE(r1) /* ... */ + std r7,FRAME_PARM5_SAVE(r1) + std r8,FRAME_PARM6_SAVE(r1) + std r9,FRAME_PARM7_SAVE(r1) + std r10,FRAME_PARM8_SAVE(r1) + mflr r0 + /* Get the address of the target functions first parameter. */ + addi r6,r1,FRAME_PARM4_SAVE + std r0,FRAME_LR_SAVE(r1) + stdu r1,-128(r1) + + /* Get the ucontexts stack pointer and size. Compute the top of stack + and round down to a quadword boundary. Then stack a dummy frame + with a null back chain. We store the context pointer in the frames + "compiler double word" field so we can recover if is the function + returns. Finally save the callers link register and TOC pointer + into this frame so the debugger can display a backtrace. + */ + ld r7,UCONTEXT_STACK_SP(r3) + ld r0,UCONTEXT_STACK_SIZE(r3) + add r7,r7,r0 + clrrdi r7,r7,4 + li r0,0 + stdu r0,-48(r7) + std r3,24(r7) + mflr r0 + std r2,FRAME_TOC_SAVE(r7) /* Store the TOC pointer for later. */ + std r0,FRAME_LR_SAVE(r7) + + /* Now we need to stack another frame to hold the parameter save area + for the function. We need to allocate a frame with the minimum 48 + byte header and 8 parameter register. However if there are more + than 8 parameters addition space is need to hold all the parameters. + The total size it rounded up to a quadword multiple then a frame is + stacked. This address is stored in the ucontext as GPR 1. */ + + cmpdi cr1,r5,8 + sldi r8,r5,3 + bgt cr1,L(gt8) + li r8,64 +L(gt8): + addi r8,r8,FRAME_PARM_SAVE+8 /* Add header plus rounding factor. */ + clrrdi r8,r8,4 /* Round down to quadword. */ + + subf r8,r8,r7 + std r7,0(r8) /* Stack the frame. */ + std r8,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3) + + /* Now we need to copy the target functions parameters. The functions + parameters are saved in the parameter save area. We skip over the + first three parameters and copy up to 8 double word into the + SIGCONTEXT_GP_REGS starting with R3. If there are more than 8 + parameters then doublewords 8-N are copied into the parameter + save area of the context frame. */ + cmpdi r5,0 + beq L(noparms) + mr r0,r5 + ble cr1,L(le8) + li r0,8 +L(le8): + mtctr r0 + addi r7,r6,-8 + addi r9,r3,(SIGCONTEXT_GP_REGS+(PT_R3*8)-8) +L(parmloop2): + ldu r0,8(r7) + stdu r0,8(r9) + bdnz L(parmloop2) + + addi r0,r5,-8 + ble cr1,L(noparms) + mtctr r0 + addi r9,r8,FRAME_PARM9_SAVE-8 +L(parmloop): + ldu r0,8(r7) + stdu r0,8(r9) + bdnz L(parmloop) + +L(noparms): + + /* Load the function address and TOC from the function descriptor + and store them in the ucontext as NIP and r2. Store the 3rd + field of the function descriptor into the ucontext as r11 in case + the calling language needs the "environment pointer". */ + ld r0,0(r4) + ld r10,8(r4); + ld r9,16(r4); + std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3) + std r10,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3) + std r9,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3) + + /* If the target function returns we need to do some cleanup. We use a + code trick to get the address of our cleanup function into the link + register. Do not add any code between here and L(exitcode). */ + bl L(gotexitcodeaddr); + + /* This is the helper code which gets called if a function which + is registered with 'makecontext' returns. In this case we + have to install the context listed in the uc_link element of + the context 'makecontext' manipulated at the time of the + 'makecontext' call. If the pointer is NULL the process must + terminate. */ +L(exitcode): + /* Recover the ucontext and TOC from the dummy frame. */ + ld r1,FRAME_BACKCHAIN(r1) /* Unstack the parameter save area frame. */ + ld r3,FRAME_COMPILER_DW(r1) + ld r2,FRAME_TOC_SAVE(r1) + ld r3,UCONTEXT_LINK(r3) /* Load the resume context. */ + cmpdi r3,0 + beq L(BADSTATUS) + bl JUMPTARGET(__setcontext) + nop + +L(BADSTATUS): +/* If setcontext returns (which can happen if the syscall fails) we will + exit the program with error status (-1). */ + li r3,-1 + b JUMPTARGET(exit); + + /* The address of the exit code is in the link register. Store the lr + in the ucontext as LNK so the target function will return to our + exit code. */ +L(gotexitcodeaddr): + mflr r0 + std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3) + ld r0,128+FRAME_LR_SAVE(r1) + addi r1,r1,128 + mtlr r0 + blr +END(__makecontext) + +weak_alias(__makecontext, makecontext) diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S new file mode 100644 index 0000000000..d503cbbf3e --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S @@ -0,0 +1,162 @@ +/* Switch to context. + Copyright (C) 2002 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + 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., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + +#define __ASSEMBLY__ +#include <asm/ptrace.h> +#include "ucontext_i.h" + +ENTRY(__setcontext) + mflr r0 + std r31,-8(1) + std r0,FRAME_LR_SAVE(r1) + stdu r1,-128(r1) + mr r31,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 + * msr and ctr. We don't restore r13 since it will be used as + * the TLS pointer. */ + lwz r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31) + cmpdi r0,0 + bne L(do_sigret) + + li r5,0 + addi r4,r3,UCONTEXT_SIGMASK + li r3,SIG_SETMASK + bl .sigprocmask + nop + cmpdi r3,0 + bne L(error_exit) + + 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) + mfcr r0 + 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(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. */ + +PSEUDO_END(__setcontext) + +weak_alias(__setcontext, setcontext) diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S new file mode 100644 index 0000000000..23422fb948 --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S @@ -0,0 +1,257 @@ +/* Save current context and install the given one. + Copyright (C) 2002 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + 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., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + +#define __ASSEMBLY__ +#include <asm/ptrace.h> +#include "ucontext_i.h" + +ENTRY(__swapcontext) + 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_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) + + mr r31,r4 + addi r5,r3,UCONTEXT_SIGMASK + addi r4,r4,UCONTEXT_SIGMASK + li r3,SIG_SETMASK + bl .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. */ + lwz r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31) + cmpdi r0,0 + bne L(do_sigret) + + 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) + mfcr r0 + 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(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. */ + +PSEUDO_END(__swapcontext) + +weak_alias(__swapcontext, swapcontext) diff --git a/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h new file mode 100644 index 0000000000..0f7b19c70c --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h @@ -0,0 +1,47 @@ +/* Copyright (C) 1998, 1999, 2002 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + 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., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _SYS_UCONTEXT_H +#define _SYS_UCONTEXT_H 1 + +#include <features.h> +#include <signal.h> + +/* We need the signal context definitions even if they are not used + included in <signal.h>. */ +#include <bits/sigcontext.h> + +/* A machine context is exactly a sigcontext. */ +typedef struct sigcontext mcontext_t; + +/* Userlevel context. */ +typedef struct ucontext + { + unsigned long int uc_flags; + struct ucontext *uc_link; + stack_t uc_stack; +#if __WORDSIZE == 32 + mcontext_t uc_mcontext; + __sigset_t uc_sigmask; +#else + sigset_t uc_sigmask; + mcontext_t uc_mcontext; /* last for extensibility */ +#endif + } ucontext_t; + +#endif /* sys/ucontext.h */ |