md.h
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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Netscape Portable Runtime library.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1994-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s): Silicon Graphics, Inc.
*
* Portions created by SGI are Copyright (C) 2000-2001 Silicon
* Graphics, Inc. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
/*
* This file is derived directly from Netscape Communications Corporation,
* and consists of extensive modifications made during the year(s) 1999-2000.
*/
#ifndef __ST_MD_H__
#define __ST_MD_H__
#if defined(ETIMEDOUT) && !defined(ETIME)
#define ETIME ETIMEDOUT
#endif
#if defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
#define MAP_ANON MAP_ANONYMOUS
#endif
#ifndef MAP_FAILED
#define MAP_FAILED -1
#endif
/*****************************************
* Platform specifics
*/
#if defined (AIX)
#define MD_STACK_GROWS_DOWN
#define MD_USE_SYSV_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#ifndef MD_HAVE_SOCKLEN_T
#define MD_HAVE_SOCKLEN_T
#define socklen_t unsigned long
#endif
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
(_thread)->context[3] = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
timebasestruct_t rt; \
(void) read_real_time(&rt, TIMEBASE_SZ); \
(void) time_base_to_time(&rt, TIMEBASE_SZ); \
return (rt.tb_high * 1000000LL + rt.tb_low / 1000)
#elif defined (CYGWIN)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_NOT_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) setjmp(env)
#define MD_LONGJMP(env, val) longjmp(env, val)
#define MD_JB_SP 7
#define MD_GET_SP(_t) (_t)->context[MD_JB_SP]
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
MD_GET_SP(_thread) = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (DARWIN)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_HAVE_SOCKLEN_T
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#if defined(__ppc__)
#define MD_JB_SP 0
#elif defined(__i386__)
#define MD_JB_SP 9
#elif defined(__x86_64__)
#define MD_JB_SP 4
#else
#error Unknown CPU architecture
#endif
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
*((long *)&((_thread)->context[MD_JB_SP])) = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (FREEBSD)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#if defined(__i386__)
#define MD_JB_SP 2
#elif defined(__alpha__)
#define MD_JB_SP 34
#elif defined(__amd64__)
#define MD_JB_SP 2
#else
#error Unknown CPU architecture
#endif
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
(_thread)->context[0]._jb[MD_JB_SP] = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (HPUX)
#define MD_STACK_GROWS_UP
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#ifndef __LP64__
/* 32-bit mode (ILP32 data model) */
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
((long *)((_thread)->context))[1] = (long) (_sp); \
ST_END_MACRO
#else
/* 64-bit mode (LP64 data model) */
#define MD_STACK_PAD_SIZE 256
/* Last stack frame must be preserved */
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
memcpy((char *)(_sp) - MD_STACK_PAD_SIZE, \
((char **)((_thread)->context))[1] - MD_STACK_PAD_SIZE, \
MD_STACK_PAD_SIZE); \
((long *)((_thread)->context))[1] = (long) (_sp); \
ST_END_MACRO
#endif /* !__LP64__ */
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (IRIX)
#include <sys/syssgi.h>
#define MD_STACK_GROWS_DOWN
#define MD_USE_SYSV_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) setjmp(env)
#define MD_LONGJMP(env, val) longjmp(env, val)
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
(void) MD_SETJMP((_thread)->context); \
(_thread)->context[JB_SP] = (long) (_sp); \
(_thread)->context[JB_PC] = (long) _main; \
ST_END_MACRO
#define MD_GET_UTIME() \
static int inited = 0; \
static clockid_t clock_id = CLOCK_SGI_CYCLE; \
struct timespec ts; \
if (!inited) { \
if (syssgi(SGI_CYCLECNTR_SIZE) < 64) \
clock_id = CLOCK_REALTIME; \
inited = 1; \
} \
(void) clock_gettime(clock_id, &ts); \
return (ts.tv_sec * 1000000LL + ts.tv_nsec / 1000)
/*
* Cap the stack by zeroing out the saved return address register
* value. This allows libexc, used by SpeedShop, to know when to stop
* backtracing since it won't find main, start, or any other known
* stack root function in a state thread's stack. Without this libexc
* traces right off the stack and crashes.
* The function preamble stores ra at 8(sp), this stores zero there.
* N.B. This macro is compiler/ABI dependent. It must change if ANY more
* automatic variables are added to the _st_thread_main() routine, because
* the address where ra is stored will change.
*/
#if !defined(__GNUC__) && defined(_MIPS_SIM) && _MIPS_SIM != _ABIO32
#define MD_CAP_STACK(var_addr) \
(((volatile __uint64_t *)(var_addr))[1] = 0)
#endif
#elif defined (LINUX)
/*
* These are properties of the linux kernel and are the same on every
* flavor and architecture.
*/
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_NOT_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
/*
* Modern GNU/Linux is Posix.1g compliant.
*/
#define MD_HAVE_SOCKLEN_T
/*
* All architectures and flavors of linux have the gettimeofday
* function but if you know of a faster way, use it.
*/
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#if defined(__ia64__)
#define MD_STACK_GROWS_DOWN
/*
* IA-64 architecture. Besides traditional memory call stack, IA-64
* uses general register stack. Thus each thread needs a backing store
* for register stack in addition to memory stack. Standard
* setjmp()/longjmp() cannot be used for thread context switching
* because their implementation implicitly assumes that only one
* register stack exists.
*/
#ifdef USE_LIBC_SETJMP
#undef USE_LIBC_SETJMP
#endif
#define MD_USE_BUILTIN_SETJMP
#define MD_STACK_PAD_SIZE 128
/* Last register stack frame must be preserved */
#define MD_INIT_CONTEXT(_thread, _sp, _bsp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
memcpy((char *)(_bsp) - MD_STACK_PAD_SIZE, \
(char *)(_thread)->context[0].__jmpbuf[17] - MD_STACK_PAD_SIZE, \
MD_STACK_PAD_SIZE); \
(_thread)->context[0].__jmpbuf[0] = (long) (_sp); \
(_thread)->context[0].__jmpbuf[17] = (long) (_bsp); \
ST_END_MACRO
#elif defined(__mips__)
#define MD_STACK_GROWS_DOWN
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
MD_SETJMP((_thread)->context); \
_thread->context[0].__jmpbuf[0].__pc = (__ptr_t) _main; \
_thread->context[0].__jmpbuf[0].__sp = _sp; \
ST_END_MACRO
#else /* Not IA-64 or mips */
/*
* On linux, there are a few styles of jmpbuf format. These vary based
* on architecture/glibc combination.
*
* Most of the glibc based toggles were lifted from:
* mozilla/nsprpub/pr/include/md/_linux.h
*/
/*
* Starting with glibc 2.4, JB_SP definitions are not public anymore.
* They, however, can still be found in glibc source tree in
* architecture-specific "jmpbuf-offsets.h" files.
* Most importantly, the content of jmp_buf is mangled by setjmp to make
* it completely opaque (the mangling can be disabled by setting the
* LD_POINTER_GUARD environment variable before application execution).
* Therefore we will use built-in _st_md_cxt_save/_st_md_cxt_restore
* functions as a setjmp/longjmp replacement wherever they are available
* unless USE_LIBC_SETJMP is defined.
*/
#if defined(__powerpc__)
#define MD_STACK_GROWS_DOWN
#if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
#ifndef JB_GPR1
#define JB_GPR1 0
#endif
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_GPR1]
#else
/* not an error but certainly cause for caution */
#error "Untested use of old glibc on powerpc"
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__misc[0]
#endif /* glibc 2.1 or later */
#elif defined(__alpha)
#define MD_STACK_GROWS_DOWN
#if defined(__GLIBC__) && __GLIBC__ >= 2
#ifndef JB_SP
#define JB_SP 8
#endif
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_SP]
#else
/* not an error but certainly cause for caution */
#error "Untested use of old glibc on alpha"
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__sp
#endif
#elif defined(__mc68000__)
#define MD_STACK_GROWS_DOWN
/* m68k still uses old style sigjmp_buf */
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__sp
#elif defined(__sparc__)
#define MD_STACK_GROWS_DOWN
#if defined(__GLIBC__) && __GLIBC__ >= 2
#ifndef JB_SP
#define JB_SP 0
#endif
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_SP]
#else
/* not an error but certainly cause for caution */
#error "Untested use of old glic on sparc -- also using odd mozilla derived __fp"
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__fp
#endif
#elif defined(__i386__)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BUILTIN_SETJMP
#if defined(__GLIBC__) && __GLIBC__ >= 2
#ifndef JB_SP
#define JB_SP 4
#endif
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_SP]
#else
/* not an error but certainly cause for caution */
#error "Untested use of old glibc on i386"
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__sp
#endif
#elif defined(__amd64__) || defined(__x86_64__)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BUILTIN_SETJMP
#ifndef JB_RSP
#define JB_RSP 6
#endif
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_RSP]
#elif defined(__arm__)
#define MD_STACK_GROWS_DOWN
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[8]
#else
#error "ARM/Linux pre-glibc2 not supported yet"
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
#elif defined(__s390__)
#define MD_STACK_GROWS_DOWN
/* There is no JB_SP in glibc at this time. (glibc 2.2.5)
*/
#define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__gregs[9]
#elif defined(__hppa__)
#define MD_STACK_GROWS_UP
/* yes, this is gross, unfortunately at the moment (2002/08/01) there is
* a bug in hppa's glibc header definition for JB_SP, so we can't
* use that...
*/
#define MD_GET_SP(_t) (*(long *)(((char *)&(_t)->context[0].__jmpbuf[0]) + 76))
#else
#error "Unknown CPU architecture"
#endif /* Cases with common MD_INIT_CONTEXT and different SP locations */
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
MD_GET_SP(_thread) = (long) (_sp); \
ST_END_MACRO
#endif /* Cases with different MD_INIT_CONTEXT */
#if defined(MD_USE_BUILTIN_SETJMP) && !defined(USE_LIBC_SETJMP)
#define MD_SETJMP(env) _st_md_cxt_save(env)
#define MD_LONGJMP(env, val) _st_md_cxt_restore(env, val)
extern int _st_md_cxt_save(jmp_buf env);
extern void _st_md_cxt_restore(jmp_buf env, int val);
#else
#define MD_SETJMP(env) setjmp(env)
#define MD_LONGJMP(env, val) longjmp(env, val)
#endif
#elif defined (NETBSD)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_HAVE_SOCKLEN_T
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#if defined(__i386__)
#define MD_JB_SP 2
#elif defined(__alpha__)
#define MD_JB_SP 34
#elif defined(__sparc__)
#define MD_JB_SP 0
#elif defined(__vax__)
#define MD_JB_SP 2
#else
#error Unknown CPU architecture
#endif
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
(_thread)->context[MD_JB_SP] = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (OPENBSD)
#define MD_STACK_GROWS_DOWN
#define MD_USE_BSD_ANON_MMAP
#define MD_ACCEPT_NB_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#if defined(__i386__)
#define MD_JB_SP 2
#elif defined(__alpha__)
#define MD_JB_SP 34
#elif defined(__sparc__)
#define MD_JB_SP 0
#elif defined(__amd64__)
#define MD_JB_SP 6
#else
#error Unknown CPU architecture
#endif
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
(_thread)->context[MD_JB_SP] = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (OSF1)
#include <signal.h>
#define MD_STACK_GROWS_DOWN
#define MD_USE_SYSV_ANON_MMAP
#define MD_ACCEPT_NB_NOT_INHERITED
#define MD_ALWAYS_UNSERIALIZED_ACCEPT
#define MD_SETJMP(env) _setjmp(env)
#define MD_LONGJMP(env, val) _longjmp(env, val)
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
((struct sigcontext *)((_thread)->context))->sc_sp = (long) (_sp); \
ST_END_MACRO
#define MD_GET_UTIME() \
struct timeval tv; \
(void) gettimeofday(&tv, NULL); \
return (tv.tv_sec * 1000000LL + tv.tv_usec)
#elif defined (SOLARIS)
#include <sys/filio.h>
extern int getpagesize(void);
#define MD_STACK_GROWS_DOWN
#define MD_USE_SYSV_ANON_MMAP
#define MD_ACCEPT_NB_NOT_INHERITED
#define MD_SETJMP(env) setjmp(env)
#define MD_LONGJMP(env, val) longjmp(env, val)
#if defined(sparc) || defined(__sparc)
#ifdef _LP64
#define MD_STACK_PAD_SIZE 4095
#endif
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
(void) MD_SETJMP((_thread)->context); \
(_thread)->context[1] = (long) (_sp); \
(_thread)->context[2] = (long) _main; \
ST_END_MACRO
#elif defined(i386) || defined(__i386)
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
(void) MD_SETJMP((_thread)->context); \
(_thread)->context[4] = (long) (_sp); \
(_thread)->context[5] = (long) _main; \
ST_END_MACRO
#elif defined(__amd64__)
#define MD_INIT_CONTEXT(_thread, _sp, _main) \
ST_BEGIN_MACRO \
if (MD_SETJMP((_thread)->context)) \
_main(); \
(_thread)->context[6] = (long) (_sp); \
ST_END_MACRO
#else
#error Unknown CPU architecture
#endif
#define MD_GET_UTIME() \
return (gethrtime() / 1000)
#else
#error Unknown OS
#endif /* OS */
/*****************************************
* Other defines
*/
#if !defined(MD_HAVE_POLL) && !defined(MD_DONT_HAVE_POLL)
#define MD_HAVE_POLL
#endif
#ifndef MD_STACK_PAD_SIZE
#define MD_STACK_PAD_SIZE 128
#endif
#if !defined(MD_HAVE_SOCKLEN_T) && !defined(socklen_t)
#define socklen_t int
#endif
#ifndef MD_CAP_STACK
#define MD_CAP_STACK(var_addr)
#endif
#endif /* !__ST_MD_H__ */