--- libcoro/coro.c	2010/04/02 20:21:21	1.52
+++ libcoro/coro.c	2011/06/10 12:27:02	1.58
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2009 Marc Alexander Lehmann <schmorp@schmorp.de>
+ * Copyright (c) 2001-2011 Marc Alexander Lehmann <schmorp@schmorp.de>
  * 
  * Redistribution and use in source and binary forms, with or without modifica-
  * tion, are permitted provided that the following conditions are met:
@@ -88,6 +88,11 @@
 
   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);
 
   /* the new coro returned. bad. just abort() for now */
@@ -120,31 +125,53 @@
        /* 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"
-         "\tpush %rbx\n"
-         "\tpush %r12\n"
-         "\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"
+         #ifdef _WIN32
+           #define NUM_SAVED 8
+           "\tpush %rsi\n"
+           "\tpush %rdi\n"
+           "\tpush %rbp\n"
+           "\tpush %rbx\n"
+           "\tpush %r12\n"
+           "\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, (%rcx)\n"
+           "\tmov (%rdx), %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"
+           "\tpop %r12\n"
+           "\tpop %rbx\n"
+           "\tpop %rbp\n"
+           "\tpop %rdi\n"
+           "\tpop %rsi\n"
+         #else
+           #define NUM_SAVED 6
+           "\tpush %rbp\n"
+           "\tpush %rbx\n"
+           "\tpush %r12\n"
+           "\tpush %r13\n"
+           "\tpush %r14\n"
+           "\tpush %r15\n"
+           "\tmov %rsp, (%rdi)\n"
+           "\tmov (%rsi), %rsp\n"
+           "\tpop %r15\n"
+           "\tpop %r14\n"
+           "\tpop %r13\n"
+           "\tpop %r12\n"
+           "\tpop %rbx\n"
+           "\tpop %rbp\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"
-         "\tpop  %r12\n"
-         "\tpop  %rbx\n"
-         "\tpop  %rbp\n"
        #elif __i386
          #define NUM_SAVED 4
          "\tpush %ebp\n"
@@ -156,17 +183,17 @@
            "\tpush %fs:4\n"
            "\tpush %fs:8\n"
          #endif
-         "\tmov  %esp, (%eax)\n"
-         "\tmov  (%edx), %esp\n"
+         "\tmov %esp, (%eax)\n"
+         "\tmov (%edx), %esp\n"
          #if CORO_WIN_TIB
-           "\tpop  %fs:8\n"
-           "\tpop  %fs:4\n"
-           "\tpop  %fs:0\n"
+           "\tpop %fs:8\n"
+           "\tpop %fs:4\n"
+           "\tpop %fs:0\n"
          #endif
-         "\tpop  %edi\n"
-         "\tpop  %esi\n"
-         "\tpop  %ebx\n"
-         "\tpop  %ebp\n"
+         "\tpop %edi\n"
+         "\tpop %esi\n"
+         "\tpop %ebx\n"
+         "\tpop %ebp\n"
        #else
          #error unsupported architecture
        #endif
@@ -212,8 +239,8 @@
     }
 
   /* 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)
@@ -307,6 +334,7 @@
   #endif
 
   ctx->sp -= NUM_SAVED;
+  memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
 
 # elif CORO_UCONTEXT
 
@@ -404,7 +432,12 @@
       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);