--- libcoro/coro.c	2001/07/23 22:16:38	1.3
+++ libcoro/coro.c	2001/11/06 20:34:11	1.9
@@ -32,7 +32,21 @@
 
 #include "coro.h"
 
-#if CORO_LOOSE || CORO_SJLJ
+#if !defined(STACK_ADJUST_PTR)
+/* IRIX is decidedly NON-unix */
+# if __sgi
+#  define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
+#  define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8)
+# elif __i386__ && CORO_LINUX
+#  define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss))
+#  define STACK_ADJUST_SIZE(sp,ss) (ss)
+# else
+#  define STACK_ADJUST_PTR(sp,ss) (sp)
+#  define STACK_ADJUST_SIZE(sp,ss) (ss)
+# endif
+#endif
+
+#if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX
 
 #include <signal.h>
 
@@ -55,7 +69,6 @@
 }
 
 # if CORO_SJLJ
-# define coro_save(ctx)     (void)setjmp((ctx)->env)
 
 static volatile int trampoline_count;
 
@@ -71,8 +84,6 @@
 
 # endif
 
-#elif CORO_UCONTEXT
-# define coro_save(ctx)     getcontext(&((ctx)->uc))
 #endif
 
 /* initialize a machine state */
@@ -84,14 +95,14 @@
 
   getcontext (&(ctx->uc));
 
-  ctx->uc.uc_link          =  0;
-  ctx->uc.uc_stack.ss_sp    = sptr;
-  ctx->uc.uc_stack.ss_size  = (size_t) ssize;
+  ctx->uc.uc_link           =  0;
+  ctx->uc.uc_stack.ss_sp    = STACK_ADJUST_PTR (sptr,ssize);
+  ctx->uc.uc_stack.ss_size  = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
   ctx->uc.uc_stack.ss_flags = 0;
 
   makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
 
-#elif CORO_SJLJ || CORO_LOOSE
+#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX
 
 # if CORO_SJLJ
   stack_t ostk, nstk;
@@ -121,8 +132,8 @@
     perror ("sigaction");
 
   /* set the new stack */
-  nstk.ss_sp    = sptr;
-  nstk.ss_size  = 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)
@@ -151,11 +162,35 @@
 
   sigprocmask (SIG_SETMASK, &osig, 0);
 
-# elif MS_LOOSE
+# elif CORO_LOOSE
 
-  coro_save (ctx);
+  setjmp (ctx->env);
   ctx->env[7] = (int)((char *)sptr + ssize);
-  ctx->env[8] = (int)coro;
+  ctx->env[8] = (int)coro_init;
+
+# elif CORO_LINUX
+
+  setjmp (ctx->env);
+#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
+    && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
+  ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init;
+  ctx->env[0].__jmpbuf[JB_SP] = (int)STACK_ADJUST_PTR (sptr,ssize);
+#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
+    && __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);
+#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);
+#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);
 
 # endif