diff options
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/fcntl.h | 15 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/mman.h | 21 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/msq.h | 3 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/sem.h | 9 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/shm.h | 6 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/stat.h | 32 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/termios.h | 87 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/bits/wordsize.h | 32 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/sys/procfs.h | 15 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/sys/ucontext.h | 144 |
10 files changed, 273 insertions, 91 deletions
diff --git a/libc/sysdeps/linux/powerpc/bits/fcntl.h b/libc/sysdeps/linux/powerpc/bits/fcntl.h index 8a709841b..19649c01c 100644 --- a/libc/sysdeps/linux/powerpc/bits/fcntl.h +++ b/libc/sysdeps/linux/powerpc/bits/fcntl.h @@ -1,5 +1,6 @@ /* O_*, F_*, FD_* bit values for Linux/PowerPC. - Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998, 2000, 2003, 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 @@ -45,7 +46,7 @@ # define O_DIRECT 0400000 /* Direct disk access. */ # define O_DIRECTORY 040000 /* Must be a directory. */ # define O_NOFOLLOW 0100000 /* Do not follow links. */ -# define O_STREAMING 04000000 /* streaming access */ +# define O_NOATIME 01000000 /* Do not set atime. */ #endif #ifdef __USE_LARGEFILE64 @@ -79,7 +80,7 @@ #define F_SETLK64 13 /* Set record locking info (non-blocking). */ #define F_SETLKW64 14 /* Set record locking info (blocking). */ -#if defined __USE_BSD || defined __USE_XOPEN2K +#if defined __USE_BSD || defined __USE_UNIX98 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */ # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */ #endif @@ -178,3 +179,11 @@ struct flock64 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ #endif + +__BEGIN_DECLS + +/* Provide kernel hint to read ahead. */ +extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) + __THROW; + +__END_DECLS diff --git a/libc/sysdeps/linux/powerpc/bits/mman.h b/libc/sysdeps/linux/powerpc/bits/mman.h index f92bc7fc3..580e93886 100644 --- a/libc/sysdeps/linux/powerpc/bits/mman.h +++ b/libc/sysdeps/linux/powerpc/bits/mman.h @@ -1,5 +1,5 @@ /* Definitions for POSIX memory map interface. Linux/PowerPC version. - Copyright (C) 1997, 2000 Free Software Foundation, Inc. + Copyright (C) 1997, 2000, 2003, 2005, 2006 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 @@ -34,6 +34,10 @@ #define PROT_WRITE 0x2 /* Page can be written. */ #define PROT_EXEC 0x4 /* Page can be executed. */ #define PROT_NONE 0x0 /* Page can not be accessed. */ +#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of + growsdown vma (mprotect only). */ +#define PROT_GROWSUP 0x02000000 /* Extend change to start of + growsup vma (mprotect only). */ /* Sharing types (must choose one and only one of these). */ #define MAP_SHARED 0x001 /* Share changes. */ @@ -52,11 +56,13 @@ /* These are Linux-specific. */ #ifdef __USE_MISC -# define MAP_GROWSDOWN 0x0100 /* Stack-like segment. */ -# define MAP_DENYWRITE 0x0800 /* ETXTBSY */ -# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable. */ -# define MAP_LOCKED 0x0080 /* Lock the mapping. */ -# define MAP_NORESERVE 0x0040 /* Don't check for reservations. */ +# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */ +# define MAP_DENYWRITE 0x00800 /* ETXTBSY */ +# define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */ +# define MAP_LOCKED 0x00080 /* Lock the mapping. */ +# define MAP_NORESERVE 0x00040 /* Don't check for reservations. */ +# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */ +# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */ #endif /* Flags to `msync'. */ @@ -83,6 +89,9 @@ # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ # define MADV_WILLNEED 3 /* Will need these pages. */ # define MADV_DONTNEED 4 /* Don't need these pages. */ +# define MADV_REMOVE 5 /* Remove these pages and resources. */ +# define MADV_DONTFORK 10 /* Do not inherit across fork. */ +# define MADV_DOFORK 11 /* Do inherit across fork. */ #endif /* The POSIX people had to invent similar names for the same things. */ diff --git a/libc/sysdeps/linux/powerpc/bits/msq.h b/libc/sysdeps/linux/powerpc/bits/msq.h index 45173a4cb..f19884437 100644 --- a/libc/sysdeps/linux/powerpc/bits/msq.h +++ b/libc/sysdeps/linux/powerpc/bits/msq.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1995, 1996, 1997, 2000, 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 @@ -21,7 +21,6 @@ #endif #include <bits/types.h> -#include <bits/wordsize.h> /* Define options for message queue functions. */ #define MSG_NOERROR 010000 /* no error if message is too big */ diff --git a/libc/sysdeps/linux/powerpc/bits/sem.h b/libc/sysdeps/linux/powerpc/bits/sem.h index 6a615f154..1c648cd19 100644 --- a/libc/sysdeps/linux/powerpc/bits/sem.h +++ b/libc/sysdeps/linux/powerpc/bits/sem.h @@ -22,7 +22,6 @@ #endif #include <sys/types.h> -#include <bits/wordsize.h> /* Flags for `semop'. */ #define SEM_UNDO 0x1000 /* undo the operation on exit */ @@ -31,8 +30,8 @@ #define GETPID 11 /* get sempid */ #define GETVAL 12 /* get semval */ #define GETALL 13 /* get all semval's */ -#define GETNCNT 14 /* get semncnt */ -#define GETZCNT 15 /* get semzcnt */ +#define GETNCNT 14 /* get semncnt */ +#define GETZCNT 15 /* get semzcnt */ #define SETVAL 16 /* set semval */ #define SETALL 17 /* set all semval's */ @@ -44,11 +43,11 @@ struct semid_ds #if __WORDSIZE == 32 unsigned int __unused1; #endif - __time_t sem_otime; /* last semop() time */ + __time_t sem_otime; /* last semop() time */ #if __WORDSIZE == 32 unsigned int __unused2; #endif - __time_t sem_ctime; /* last time changed by semctl() */ + __time_t sem_ctime; /* last time changed by semctl() */ unsigned long int sem_nsems; /* number of semaphores in set */ unsigned long __unused3; unsigned long __unused4; diff --git a/libc/sysdeps/linux/powerpc/bits/shm.h b/libc/sysdeps/linux/powerpc/bits/shm.h index 6477df634..62560c0ca 100644 --- a/libc/sysdeps/linux/powerpc/bits/shm.h +++ b/libc/sysdeps/linux/powerpc/bits/shm.h @@ -22,7 +22,6 @@ #endif #include <bits/types.h> -#include <bits/wordsize.h> /* Permission flag for shmget. */ #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ @@ -81,9 +80,10 @@ struct shmid_ds # define SHM_INFO 14 /* shm_mode upper byte flags */ -# define SHM_DEST 01000 /* segment will be destroyed on last detach */ -# define SHM_LOCKED 02000 /* segment will not be swapped */ +# define SHM_DEST 01000 /* segment will be destroyed on last detach */ +# define SHM_LOCKED 02000 /* segment will not be swapped */ # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ +# define SHM_NORESERVE 010000 /* don't check for reservations */ struct shminfo { diff --git a/libc/sysdeps/linux/powerpc/bits/stat.h b/libc/sysdeps/linux/powerpc/bits/stat.h index c85695e51..af71f275e 100644 --- a/libc/sysdeps/linux/powerpc/bits/stat.h +++ b/libc/sysdeps/linux/powerpc/bits/stat.h @@ -27,11 +27,11 @@ #define _STAT_VER_LINUX_OLD 1 #define _STAT_VER_KERNEL 1 #define _STAT_VER_SVR4 2 +#define _STAT_VER_LINUX 3 #if __WORDSIZE == 32 -# define _STAT_VER_LINUX 3 -# define _STAT_VER _STAT_VER_LINUX /* The one defined below. */ +# define _STAT_VER _STAT_VER_LINUX #else -# define _STAT_VER _STAT_VER_KERNEL /* The one defined below. */ +# define _STAT_VER _STAT_VER_KERNEL #endif /* Versions of the `xmknod' interface. */ @@ -70,11 +70,11 @@ struct stat __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */ # endif __time_t st_atime; /* Time of last access. */ - unsigned long int __unused1; /* Reserved for atime.nanoseconds. */ + unsigned long int st_atimensec; /* Nscecs of last access. */ __time_t st_mtime; /* Time of last modification. */ - unsigned long int __unused2; /* Reserved for mtime.nanoseconds. */ + unsigned long int st_mtimensec; /* Nsecs of last modification. */ __time_t st_ctime; /* Time of last status change. */ - unsigned long int __unused3; /* Reserved for ctime.nanoseconds. */ + unsigned long int st_ctimensec; /* Nsecs of last status change. */ unsigned long int __unused4; unsigned long int __unused5; }; @@ -95,11 +95,11 @@ struct stat64 __blksize_t st_blksize; /* Optimal block size for I/O. */ __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */ __time_t st_atime; /* Time of last access. */ - unsigned long int __unused1; /* Reserved for atime.nanoseconds. */ + unsigned long int st_atimensec; /* Nscecs of last access. */ __time_t st_mtime; /* Time of last modification. */ - unsigned long int __unused2; /* Reserved for mtime.nanoseconds. */ + unsigned long int st_mtimensec; /* Nsecs of last modification. */ __time_t st_ctime; /* Time of last status change. */ - unsigned long int __unused3; /* Reserved for ctime.nanoseconds. */ + unsigned long int st_ctimensec; /* Nsecs of last status change. */ unsigned long int __unused4; unsigned long int __unused5; }; @@ -134,11 +134,11 @@ struct stat __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */ # endif __time_t st_atime; /* Time of last access. */ - unsigned long int __unused1; /* Reserved for atime.nanoseconds. */ + unsigned long int st_atimensec; /* Nscecs of last access. */ __time_t st_mtime; /* Time of last modification. */ - unsigned long int __unused2; /* Reserved for mtime.nanoseconds. */ + unsigned long int st_mtimensec; /* Nsecs of last modification. */ __time_t st_ctime; /* Time of last status change. */ - unsigned long int __unused3; /* Reserved for ctime.nanoseconds. */ + unsigned long int st_ctimensec; /* Nsecs of last status change. */ unsigned long int __unused4; unsigned long int __unused5; unsigned long int __unused6; @@ -159,11 +159,11 @@ struct stat64 __blksize_t st_blksize; /* Optimal block size for I/O. */ __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */ __time_t st_atime; /* Time of last access. */ - unsigned long int __unused1; /* Reserved for atime.nanoseconds. */ + unsigned long int st_atimensec; /* Nscecs of last access. */ __time_t st_mtime; /* Time of last modification. */ - unsigned long int __unused2; /* Reserved for mtime.nanoseconds. */ + unsigned long int st_mtimensec; /* Nsecs of last modification. */ __time_t st_ctime; /* Time of last status change. */ - unsigned long int __unused3; /* Reserved for ctime.nanoseconds. */ + unsigned long int st_ctimensec; /* Nsecs of last status change. */ unsigned long int __unused4; unsigned long int __unused5; unsigned long int __unused6; @@ -175,6 +175,8 @@ struct stat64 /* Tell code we have these members. */ #define _STATBUF_ST_BLKSIZE #define _STATBUF_ST_RDEV +/* Nanosecond resolution time values are supported. */ +#define _STATBUF_ST_NSEC /* Encoding of the file mode. */ diff --git a/libc/sysdeps/linux/powerpc/bits/termios.h b/libc/sysdeps/linux/powerpc/bits/termios.h index f7b89ae59..7aac02dc5 100644 --- a/libc/sysdeps/linux/powerpc/bits/termios.h +++ b/libc/sysdeps/linux/powerpc/bits/termios.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc. +/* Copyright (C) 1997,1999,2001,2003,2004,2005 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 @@ -40,6 +40,8 @@ struct termios { cc_t c_cc[NCCS]; /* control characters */ speed_t c_ispeed; /* input speed */ speed_t c_ospeed; /* output speed */ +#define _HAVE_STRUCT_TERMIOS_C_ISPEED 1 +#define _HAVE_STRUCT_TERMIOS_C_OSPEED 1 }; /* c_cc characters */ @@ -77,6 +79,7 @@ struct termios { #define IXANY 0004000 #define IUCLC 0010000 #define IMAXBEL 0020000 +#define IUTF8 0040000 /* c_oflag bits */ #define OPOST 0000001 @@ -89,34 +92,41 @@ struct termios { #define OFILL 00000100 #define OFDEL 00000200 -#define NLDLY 00001400 -#define NL0 00000000 -#define NL1 00000400 -#define NL2 00001000 -#define NL3 00001400 -#define TABDLY 00006000 -#define TAB0 00000000 -#define TAB1 00002000 -#define TAB2 00004000 -#define TAB3 00006000 -#define CRDLY 00030000 -#define CR0 00000000 -#define CR1 00010000 -#define CR2 00020000 -#define CR3 00030000 -#define FFDLY 00040000 -#define FF0 00000000 -#define FF1 00040000 -#define BSDLY 00100000 -#define BS0 00000000 -#define BS1 00100000 +#if defined __USE_MISC || defined __USE_XOPEN +# define NLDLY 00001400 +# define NL0 00000000 +# define NL1 00000400 +# define NL2 00001000 +# define NL3 00001400 +# define TABDLY 00006000 +# define TAB0 00000000 +# define TAB1 00002000 +# define TAB2 00004000 +# define TAB3 00006000 +# define CRDLY 00030000 +# define CR0 00000000 +# define CR1 00010000 +# define CR2 00020000 +# define CR3 00030000 +# define FFDLY 00040000 +# define FF0 00000000 +# define FF1 00040000 +# define BSDLY 00100000 +# define BS0 00000000 +# define BS1 00100000 +#endif #define VTDLY 00200000 #define VT0 00000000 #define VT1 00200000 -#define XTABS 01000000 /* Hmm.. Linux/i386 considers this part of TABDLY.. */ + +#ifdef __USE_MISC +# define XTABS 00006000 +#endif /* c_cflag bit meaning */ -#define CBAUD 0000377 +#ifdef __USE_MISC +# define CBAUD 0000377 +#endif #define B0 0000000 /* hang up */ #define B50 0000001 #define B75 0000002 @@ -133,9 +143,11 @@ struct termios { #define B9600 0000015 #define B19200 0000016 #define B38400 0000017 -#define EXTA B19200 -#define EXTB B38400 -#define CBAUDEX 0000020 +#ifdef __USE_MISC +# define EXTA B19200 +# define EXTB B38400 +# define CBAUDEX 0000020 +#endif #define B57600 00020 #define B115200 00021 #define B230400 00022 @@ -166,23 +178,30 @@ struct termios { #define HUPCL 00040000 #define CLOCAL 00100000 -#define CRTSCTS 020000000000 /* flow control */ +#ifdef __USE_MISC +# define CMSPAR 010000000000 /* mark or space (stick) parity */ +# define CRTSCTS 020000000000 /* flow control */ +#endif /* c_lflag bits */ #define ISIG 0x00000080 #define ICANON 0x00000100 -#define XCASE 0x00004000 +#if defined __USE_MISC || defined __USE_XOPEN +# define XCASE 0x00004000 +#endif #define ECHO 0x00000008 #define ECHOE 0x00000002 #define ECHOK 0x00000004 #define ECHONL 0x00000010 #define NOFLSH 0x80000000 #define TOSTOP 0x00400000 -#define ECHOCTL 0x00000040 -#define ECHOPRT 0x00000020 -#define ECHOKE 0x00000001 -#define FLUSHO 0x00800000 -#define PENDIN 0x20000000 +#ifdef __USE_MISC +# define ECHOCTL 0x00000040 +# define ECHOPRT 0x00000020 +# define ECHOKE 0x00000001 +# define FLUSHO 0x00800000 +# define PENDIN 0x20000000 +#endif #define IEXTEN 0x00000400 /* Values for the ACTION argument to `tcflow'. */ diff --git a/libc/sysdeps/linux/powerpc/bits/wordsize.h b/libc/sysdeps/linux/powerpc/bits/wordsize.h index ba643b60a..cf934234f 100644 --- a/libc/sysdeps/linux/powerpc/bits/wordsize.h +++ b/libc/sysdeps/linux/powerpc/bits/wordsize.h @@ -1,19 +1,19 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. +/* Determine the wordsize from the preprocessor defines. */ - 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. +#if defined __powerpc64__ +# define __WORDSIZE 64 +# define __WORDSIZE_COMPAT32 1 +#else +# define __WORDSIZE 32 +#endif - 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. +#if !defined __NO_LONG_DOUBLE_MATH && !defined __LONG_DOUBLE_MATH_OPTIONAL - 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. */ - -#define __WORDSIZE 32 +/* Signal the glibc ABI didn't used to have a `long double'. + The changes all the `long double' function variants to be redirects + to the double functions. */ +# define __LONG_DOUBLE_MATH_OPTIONAL 1 +# ifndef __LONG_DOUBLE_128__ +# define __NO_LONG_DOUBLE_MATH 1 +# endif +#endif diff --git a/libc/sysdeps/linux/powerpc/sys/procfs.h b/libc/sysdeps/linux/powerpc/sys/procfs.h index ff85f09f9..d2d597241 100644 --- a/libc/sysdeps/linux/powerpc/sys/procfs.h +++ b/libc/sysdeps/linux/powerpc/sys/procfs.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 1999, 2002, 2006 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 @@ -32,9 +32,17 @@ __BEGIN_DECLS +/* These definitions are normally provided by ucontext.h via + asm/sigcontext.h, asm/ptrace.h, and asm/elf.h. Otherwise we define + them here. */ +#ifndef __PPC64_ELF_H #define ELF_NGREG 48 /* includes nip, msr, lr, etc. */ #define ELF_NFPREG 33 /* includes fpscr */ -#define ELF_NVRREG 33 /* includes vscr */ +#if __WORDSIZE == 32 +# define ELF_NVRREG 33 /* includes vscr */ +#else +# define ELF_NVRREG 34 /* includes vscr */ +#endif typedef unsigned long elf_greg_t; typedef elf_greg_t elf_gregset_t[ELF_NGREG]; @@ -45,8 +53,9 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; /* Altivec registers */ typedef struct { unsigned int u[4]; -} __attribute((aligned (16))) elf_vrreg_t; +} __attribute__ ((aligned (16))) elf_vrreg_t; typedef elf_vrreg_t elf_vrregset_t[ELF_NVRREG]; +#endif struct elf_siginfo { diff --git a/libc/sysdeps/linux/powerpc/sys/ucontext.h b/libc/sysdeps/linux/powerpc/sys/ucontext.h index 07f0933ff..9eb50aa96 100644 --- a/libc/sysdeps/linux/powerpc/sys/ucontext.h +++ b/libc/sysdeps/linux/powerpc/sys/ucontext.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1998, 1999, 2002, 2004, 2005 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 @@ -26,7 +26,110 @@ included in <signal.h>. */ #include <bits/sigcontext.h> -typedef struct sigcontext mcontext_t; +#if __WORDSIZE == 32 + +/* Number of general registers. */ +# define NGREG 48 + +/* Container for all general registers. */ +typedef unsigned long gregset_t[NGREG]; + +/* Container for floating-point registers and status */ +typedef struct _libc_fpstate +{ + double fpregs[32]; + double fpscr; + unsigned int _pad[2]; +} fpregset_t; + +/* Container for Altivec/VMX registers and status. + Needs to be aligned on a 16-byte boundary. */ +typedef struct _libc_vrstate +{ + unsigned int vrregs[32][4]; + unsigned int vrsave; + unsigned int _pad[2]; + unsigned int vscr; +} vrregset_t; + +/* Context to describe whole processor state. */ +typedef struct +{ + gregset_t gregs; + fpregset_t fpregs; + vrregset_t vrregs __attribute__((__aligned__(16))); +} mcontext_t; + +#else + +/* For 64-bit kernels with Altivec support, a machine context is exactly + * a sigcontext. For older kernel (without Altivec) the sigcontext matches + * the mcontext upto but not including the v_regs field. For kernels that + * don't AT_HWCAP or return AT_HWCAP without PPC_FEATURE_HAS_ALTIVEC the + * v_regs field may not exit and should not be referenced. The v_regd field + * can be refernced safely only after verifying that PPC_FEATURE_HAS_ALTIVEC + * is set in AT_HWCAP. */ + +/* Number of general registers. */ +# define NGREG 48 /* includes r0-r31, nip, msr, lr, etc. */ +# define NFPREG 33 /* includes fp0-fp31 &fpscr. */ +# define NVRREG 34 /* includes v0-v31, vscr, & vrsave in split vectors */ + +typedef unsigned long gregset_t[NGREG]; +typedef double fpregset_t[NFPREG]; + +/* Container for Altivec/VMX Vector Status and Control Register. Only 32-bits + but can only be copied to/from a 128-bit vector register. So we allocated + a whole quadword speedup save/restore. */ +typedef struct _libc_vscr +{ + unsigned int __pad[3]; + unsigned int vscr_word; +} vscr_t; + +/* Container for Altivec/VMX registers and status. + Must to be aligned on a 16-byte boundary. */ +typedef struct _libc_vrstate +{ + unsigned int vrregs[32][4]; + vscr_t vscr; + unsigned int vrsave; + unsigned int __pad[3]; +} vrregset_t __attribute__((__aligned__(16))); + +typedef struct { + unsigned long __unused[4]; + int signal; + int __pad0; + unsigned long handler; + unsigned long oldmask; + struct pt_regs *regs; + gregset_t gp_regs; + fpregset_t fp_regs; +/* + * To maintain compatibility with current implementations the sigcontext is + * extended by appending a pointer (v_regs) to a quadword type (elf_vrreg_t) + * followed by an unstructured (vmx_reserve) field of 69 doublewords. This + * allows the array of vector registers to be quadword aligned independent of + * the alignment of the containing sigcontext or ucontext. It is the + * responsibility of the code setting the sigcontext to set this pointer to + * either NULL (if this processor does not support the VMX feature) or the + * address of the first quadword within the allocated (vmx_reserve) area. + * + * The pointer (v_regs) of vector type (elf_vrreg_t) is essentually + * an array of 34 quadword entries. The entries with + * indexes 0-31 contain the corresponding vector registers. The entry with + * index 32 contains the vscr as the last word (offset 12) within the + * quadword. This allows the vscr to be stored as either a quadword (since + * it must be copied via a vector register to/from storage) or as a word. + * The entry with index 33 contains the vrsave as the first word (offset 0) + * within the quadword. + */ + vrregset_t *v_regs; + long vmx_reserve[NVRREG+NVRREG+1]; +} mcontext_t; + +#endif /* Userlevel context. */ typedef struct ucontext @@ -34,8 +137,41 @@ typedef struct ucontext unsigned long int uc_flags; struct ucontext *uc_link; stack_t uc_stack; - mcontext_t uc_mcontext; - __sigset_t uc_sigmask; +#if __WORDSIZE == 32 + /* + * These fields are set up this way to maximize source and + * binary compatibility with code written for the old + * ucontext_t definition, which didn't include space for the + * registers. + * + * Different versions of the kernel have stored the registers on + * signal delivery at different offsets from the ucontext struct. + * Programs should thus use the uc_mcontext.uc_regs pointer to + * find where the registers are actually stored. The registers + * will be stored within the ucontext_t struct but not necessarily + * at a fixed address. As a side-effect, this lets us achieve + * 16-byte alignment for the register storage space if the + * Altivec registers are to be saved, without requiring 16-byte + * alignment on the whole ucontext_t. + * + * The uc_mcontext.regs field is included for source compatibility + * with programs written against the older ucontext_t definition, + * and its name should therefore not change. The uc_pad field + * is for binary compatibility with programs compiled against the + * old ucontext_t; it ensures that uc_mcontext.regs and uc_sigmask + * are at the same offset as previously. + */ + int uc_pad[7]; + union uc_regs_ptr { + struct pt_regs *regs; + mcontext_t *uc_regs; + } uc_mcontext; + sigset_t uc_sigmask; + char uc_reg_space[sizeof(mcontext_t) + 12]; /* last for extensibility */ +#else /* 64-bit */ + sigset_t uc_sigmask; + mcontext_t uc_mcontext; /* last for extensibility */ +#endif } ucontext_t; #endif /* sys/ucontext.h */ |