--- libcoro/coro.c 2008/11/08 04:31:28 1.39 +++ libcoro/coro.c 2011/05/30 02:46:52 1.57 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001-2008 Marc Alexander Lehmann + * Copyright (c) 2001-2011 Marc Alexander Lehmann * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: @@ -76,15 +76,9 @@ # include # endif -static volatile coro_func coro_init_func; -static volatile void *coro_init_arg; -static volatile coro_context *new_coro, *create_coro; - -/* what we really want to detect here is wether we use a new-enough version of GAS */ -/* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ -# if __GNUC__ >= 3 && __ELF__ && __linux__ -# define HAVE_CFI 1 -# endif +static coro_func coro_init_func; +static void *coro_init_arg; +static coro_context *new_coro, *create_coro; static void coro_init (void) @@ -92,7 +86,12 @@ volatile coro_func func = coro_init_func; volatile void *arg = coro_init_arg; - coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); + coro_transfer (new_coro, create_coro); + +#if __linux && __amd64 + /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */ + asm (".cfi_undefined rip"); +#endif func ((void *)arg); @@ -108,21 +107,8 @@ static void trampoline (int sig) { - if ( - #if _XOPEN_UNIX > 0 - _setjmp (new_coro->env) - #else - setjmp (new_coro->env) - #endif - ) { - #if HAVE_CFI - asm (".cfi_startproc"); - #endif - coro_init (); /* start it */ - #if HAVE_CFI - asm (".cfi_endproc"); - #endif - } + if (coro_setjmp (new_coro->env)) + coro_init (); /* start it */ else trampoline_done = 1; } @@ -136,6 +122,8 @@ ".globl coro_transfer\n" ".type coro_transfer, @function\n" "coro_transfer:\n" + /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ + /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ #if __amd64 #define NUM_SAVED 6 "\tpush %rbp\n" @@ -144,8 +132,18 @@ "\tpush %r13\n" "\tpush %r14\n" "\tpush %r15\n" + #if CORO_WIN_TIB + "\tpush %gs:0x0\n" + "\tpush %gs:0x8\n" + "\tpush %gs:0xc\n" + #endif "\tmov %rsp, (%rdi)\n" "\tmov (%rsi), %rsp\n" + #if CORO_WIN_TIB + "\tpop %gs:0xc\n" + "\tpop %gs:0x8\n" + "\tpop %gs:0x0\n" + #endif "\tpop %r15\n" "\tpop %r14\n" "\tpop %r13\n" @@ -158,8 +156,18 @@ "\tpush %ebx\n" "\tpush %esi\n" "\tpush %edi\n" + #if CORO_WIN_TIB + "\tpush %fs:0\n" + "\tpush %fs:4\n" + "\tpush %fs:8\n" + #endif "\tmov %esp, (%eax)\n" "\tmov (%edx), %esp\n" + #if CORO_WIN_TIB + "\tpop %fs:8\n" + "\tpop %fs:4\n" + "\tpop %fs:0\n" + #endif "\tpop %edi\n" "\tpop %esi\n" "\tpop %ebx\n" @@ -209,8 +217,8 @@ } /* set the new stack */ - nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ - nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); + nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ + nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); nstk.ss_flags = 0; if (sigaltstack (&nstk, &ostk) < 0) @@ -243,54 +251,68 @@ # elif CORO_LOSER - setjmp (ctx->env); - #if __CYGWIN__ - ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); - ctx->env[8] = (long)coro_init; + coro_setjmp (ctx->env); + #if __CYGWIN__ && __i386 + ctx->env[8] = (long) coro_init; + ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); + #elif __CYGWIN__ && __x86_64 + ctx->env[7] = (long) coro_init; + ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); + #elif defined(__MINGW32__) + ctx->env[5] = (long) coro_init; + ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); #elif defined(_M_IX86) - ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; - ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); + ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; + ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); #elif defined(_M_AMD64) - ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; - ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); + ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; + ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); #elif defined(_M_IA64) - ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; - ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); + ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; + ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); #else #error "microsoft libc or architecture not supported" #endif # elif CORO_LINUX - _setjmp (ctx->env); + coro_setjmp (ctx->env); #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) - ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; - ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); + ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; + ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; - ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); + ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); #elif defined (__GNU_LIBRARY__) && defined (__i386__) - ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; - ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); + ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; + ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); #elif defined (__GNU_LIBRARY__) && defined (__amd64__) - ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; - ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); + ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; + ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); #else #error "linux libc or architecture not supported" #endif # elif CORO_IRIX - setjmp (ctx->env); - ctx->env[JB_PC] = (__uint64_t)coro_init; - ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); + coro_setjmp (ctx->env, 0); + ctx->env[JB_PC] = (__uint64_t)coro_init; + ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); # elif CORO_ASM - ctx->sp = (volatile void **)(ssize + (char *)sptr); + ctx->sp = (void **)(ssize + (char *)sptr); *--ctx->sp = (void *)abort; /* needed for alignment only */ *--ctx->sp = (void *)coro_init; + + #if CORO_WIN_TIB + *--ctx->sp = 0; /* ExceptionList */ + *--ctx->sp = (char *)sptr + ssize; /* StackBase */ + *--ctx->sp = sptr; /* StackLimit */ + #endif + ctx->sp -= NUM_SAVED; + memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); # elif CORO_UCONTEXT @@ -308,13 +330,10 @@ coro_transfer (create_coro, new_coro); } -#endif - /*****************************************************************************/ /* pthread backend */ /*****************************************************************************/ - -#if CORO_PTHREAD +#elif CORO_PTHREAD /* this mutex will be locked by the running coroutine */ pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; @@ -358,6 +377,9 @@ { pthread_cond_signal (&next->cv); pthread_cond_wait (&prev->cv, &coro_mutex); +#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ + pthread_testcancel (); +#endif } void @@ -388,7 +410,12 @@ args.main = &nctx; pthread_attr_init (&attr); +#if __UCLIBC__ + /* exists, but is borked */ + /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ +#else pthread_attr_setstack (&attr, sptr, (size_t)ssize); +#endif pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); pthread_create (&ctx->id, &attr, coro_init, &args); @@ -412,5 +439,7 @@ pthread_cond_destroy (&ctx->cv); } +#else +# error unsupported backend #endif