diff options
Diffstat (limited to 'lib/libthr/arch')
| -rw-r--r-- | lib/libthr/arch/i386/Makefile.inc | 5 | ||||
| -rw-r--r-- | lib/libthr/arch/i386/i386/_curthread.S | 17 | ||||
| -rw-r--r-- | lib/libthr/arch/i386/i386/_setcurthread.c | 163 | ||||
| -rw-r--r-- | lib/libthr/arch/ia64/Makefile.inc | 5 | ||||
| -rw-r--r-- | lib/libthr/arch/ia64/ia64/_curthread.c | 59 | ||||
| -rw-r--r-- | lib/libthr/arch/sparc64/Makefile.inc | 5 | ||||
| -rw-r--r-- | lib/libthr/arch/sparc64/sparc64/_setcurthread.c | 59 |
7 files changed, 313 insertions, 0 deletions
diff --git a/lib/libthr/arch/i386/Makefile.inc b/lib/libthr/arch/i386/Makefile.inc new file mode 100644 index 0000000..0c86284 --- /dev/null +++ b/lib/libthr/arch/i386/Makefile.inc @@ -0,0 +1,5 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/sys ${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH} + +SRCS+= _setcurthread.c _curthread.S diff --git a/lib/libthr/arch/i386/i386/_curthread.S b/lib/libthr/arch/i386/i386/_curthread.S new file mode 100644 index 0000000..1f11f88 --- /dev/null +++ b/lib/libthr/arch/i386/i386/_curthread.S @@ -0,0 +1,17 @@ +/* $FreeBSD$ */ + +#include <machine/asm.h> + +ENTRY(_get_curthread) + cmpl $0, _thread_initial + je nothreads + movl %gs:0, %eax + ret +nothreads: + xor %eax, %eax + ret + +ENTRY(_set_gs) + movl 4(%esp), %eax + movl %eax, %gs + ret diff --git a/lib/libthr/arch/i386/i386/_setcurthread.c b/lib/libthr/arch/i386/i386/_setcurthread.c new file mode 100644 index 0000000..1960c0e --- /dev/null +++ b/lib/libthr/arch/i386/i386/_setcurthread.c @@ -0,0 +1,163 @@ +/* + * Copyright (c) 2003, Jeffrey Roberson <jeff@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/types.h> +#include <sys/ucontext.h> + +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <machine/sysarch.h> +#include <machine/segments.h> + +#include "thr_private.h" + +#define MAXTHR 128 + +#define LDT_INDEX(x) (((long)(x) - (long)ldt_entries) / sizeof(ldt_entries[0])) + +void **ldt_free = NULL; +void *ldt_entries[MAXTHR]; +static int ldt_inited = 0; +static spinlock_t ldt_lock = _SPINLOCK_INITIALIZER; + +static void ldt_init(void); + +/* in _curthread.S */ +extern void _set_gs(int); + +/* + * Initialize the array of ldt_entries and the next free slot. + * This routine must be called with the global ldt lock held. + */ +static void +ldt_init(void) +{ + int i; + + ldt_free = &ldt_entries[NLDT]; + + for (i = 0; i < MAXTHR - 1; i++) + ldt_entries[i] = (void *)&ldt_entries[i + 1]; + + ldt_entries[MAXTHR - 1] = NULL; + + ldt_inited = 1; +} + +void +_retire_thread(void *entry) +{ + _spinlock(&ldt_lock); + if (ldt_free == NULL) + *(void **)entry = NULL; + else + *(void **)entry = *ldt_free; + ldt_free = entry; + _spinunlock(&ldt_lock); +} + +void * +_set_curthread(ucontext_t *uc, struct pthread *thr, int *err) +{ + union descriptor desc; + void **ldt_entry; + int ldt_index; + int error; + + *err = 0; + + /* + * If we are setting up the initial thread, the gs register + * won't be setup for the current thread. In any case, we + * don't need protection from re-entrancy at this point in + * the life of the program. + */ + if (thr != _thread_initial) + _SPINLOCK(&ldt_lock); + + if (ldt_inited == NULL) + ldt_init(); + + if (ldt_free == NULL) { + /* Concurrent thread limit reached */ + *err = curthread->error = EAGAIN; + if (thr != _thread_initial) + _SPINUNLOCK(&ldt_lock); + return (NULL); + } + + /* + * Pull one off of the free list and update the free list pointer. + */ + ldt_entry = ldt_free; + ldt_free = (void **)*ldt_entry; + + if (thr != _thread_initial) + _SPINUNLOCK(&ldt_lock); + + /* + * Cache the address of the thread structure here. This is + * what the gs register will point to. + */ + *ldt_entry = (void *)thr; + ldt_index = LDT_INDEX(ldt_entry); + + bzero(&desc, sizeof(desc)); + + /* + * Set up the descriptor to point into the ldt table which contains + * only a pointer to the thread. + */ + desc.sd.sd_lolimit = sizeof(*ldt_entry); + desc.sd.sd_lobase = (unsigned int)ldt_entry & 0xFFFFFF; + desc.sd.sd_type = SDT_MEMRO; + desc.sd.sd_dpl = SEL_UPL; + desc.sd.sd_p = 1; + desc.sd.sd_hilimit = 0; + desc.sd.sd_xx = 0; + desc.sd.sd_def32 = 1; + desc.sd.sd_gran = 0; + desc.sd.sd_hibase = (unsigned int)ldt_entry >> 24; + + error = i386_set_ldt(ldt_index, &desc, 1); + if (error == -1) + abort(); + + /* + * Set up our gs with the index into the ldt for this entry. + */ + if (uc != NULL) + uc->uc_mcontext.mc_gs = LSEL(ldt_index, SEL_UPL); + else + _set_gs(LSEL(ldt_index, SEL_UPL)); + + return (ldt_entry); +} diff --git a/lib/libthr/arch/ia64/Makefile.inc b/lib/libthr/arch/ia64/Makefile.inc new file mode 100644 index 0000000..6599098 --- /dev/null +++ b/lib/libthr/arch/ia64/Makefile.inc @@ -0,0 +1,5 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/sys ${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH} + +SRCS+= _curthread.c diff --git a/lib/libthr/arch/ia64/ia64/_curthread.c b/lib/libthr/arch/ia64/ia64/_curthread.c new file mode 100644 index 0000000..6c3de0e --- /dev/null +++ b/lib/libthr/arch/ia64/ia64/_curthread.c @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2003 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/ucontext.h> + +#include <pthread.h> +#include "thr_private.h" + +register struct pthread *_tp __asm("%r13"); + +struct pthread * +_get_curthread(void) +{ + + return (_tp); +} + +void +_retire_thread(void *v) +{ +} + +void * +_set_curthread(ucontext_t *uc, struct pthread *thread, int *err) +{ + *err = 0; + if (uc != NULL) + uc->uc_mcontext.mc_special.tp = (uint64_t)thread; + else + _tp = thread; + return (NULL); +} diff --git a/lib/libthr/arch/sparc64/Makefile.inc b/lib/libthr/arch/sparc64/Makefile.inc new file mode 100644 index 0000000..ee22813 --- /dev/null +++ b/lib/libthr/arch/sparc64/Makefile.inc @@ -0,0 +1,5 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/sys ${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH} + +SRCS+= _setcurthread.c diff --git a/lib/libthr/arch/sparc64/sparc64/_setcurthread.c b/lib/libthr/arch/sparc64/sparc64/_setcurthread.c new file mode 100644 index 0000000..4c0fb88 --- /dev/null +++ b/lib/libthr/arch/sparc64/sparc64/_setcurthread.c @@ -0,0 +1,59 @@ +/*- + * Copyright (c) 2002 Jake Burkholder. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/ucontext.h> + +#include <pthread.h> +#include "thr_private.h" + +register struct pthread *_curthread __asm("%g6"); + +struct pthread * +_get_curthread(void) +{ + + return (_curthread); +} + +void +_retire_thread(void *v) +{ +} + +void * +_set_curthread(ucontext_t *uc, struct pthread *thread, int *err) +{ + *err = 0; + if (uc != NULL) + uc->uc_mcontext.mc_global[6] = (uint64_t)thread; + else + _curthread = thread; + return (NULL); +} |
