Changes in libcfa/src/concurrency/CtxSwitch-i386.S [a4bdbcd:b78129a]

File:

• libcfa/src/concurrency/CtxSwitch-i386.S (modified) (3 diffs)

libcfa/src/concurrency/CtxSwitch-i386.S

@@ -10 +10 @@
 // Created On       : Tue Dec 6 12:27:26 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sun Sep  6 18:23:37 2020
-// Update Count     : 5
+// Last Modified On : Fri Jul 21 22:29:25 2017
+// Update Count     : 1
+//
+// This  library is free  software; you  can redistribute  it and/or  modify it
+// under the terms of the GNU Lesser General Public License as published by the
+// Free Software  Foundation; either  version 2.1 of  the License, or  (at your
+// option) any later version.
+//
+// This library is distributed in the  hope that it will be useful, but WITHOUT
+// ANY  WARRANTY;  without even  the  implied  warranty  of MERCHANTABILITY  or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+// for more details.
+//
+// You should  have received a  copy of the  GNU Lesser General  Public License
+// along  with this library.
 //
 
-// The context switch routine requires the initial the stack of a thread to
-// look like the thread has saved its context in the normal manner.
+// This context switch routine depends on the fact that the stack of a new
+// thread has been set up to look like the thread has saved its context in
+// the normal manner.
+//
+// void CtxSwitch( machine_context *from, machine_context *to );
 
-// Offsets must synchronized with the __stack_context_t in invoke.h.
+// Offsets in the context structure. This needs to be synchronized with the
+// high level code a little better.
 
 #define PTR_BYTE        4
 #define SP_OFFSET       ( 0 * PTR_BYTE )
 #define FP_OFFSET       ( 1 * PTR_BYTE )
+#define PC_OFFSET       ( 2 * PTR_BYTE )
 
-// Context switch between coroutines/tasks.
-//   void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) ;
-// Arguments "from" in register 4(%esp), "to" in register 20(%esp)
-
-        .file "CtxSwitch-i386.S"
         .text
         .align 2
-        .global __cfactx_switch
-        .type __cfactx_switch, @function
-__cfactx_switch:
+        .globl CtxSwitch
+        .type  CtxSwitch, @function
+CtxSwitch:
 
         // Copy the "from" context argument from the stack to register eax
-        // Return address is at 0(%esp), with parameters following.
+        // Return address is at 0(%esp), with parameters following
 
         movl 4(%esp),%eax
@@ -50 +63 @@
         movl %ebp,FP_OFFSET(%eax)
 
-        // Copy the "to" context argument from the stack to register eax. Having
-        // pushed 3 words (= 12 bytes) on the stack, the argument is now at
-        // 8 + 12 = 20(%esp).
+        // Copy the "to" context argument from the stack to register eax
+        // Having pushed three words (= 12 bytes) on the stack, the
+        // argument is now at 8 + 12 = 20(%esp)
 
         movl 20(%esp),%eax
@@ -70 +83 @@
 
         ret
-        .size __cfactx_switch, .-__cfactx_switch
+        .size  CtxSwitch, .-CtxSwitch
 
 // Local Variables: //