Changeset 8e000b8d in mainline

Timestamp:

2009-10-22T16:22:53Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3cc110f

Parents:

4a537dd

Message:

Rename syscall_{int,sysenter} to syscall_{slow,fast}. Syscalls that could be
potentially handled by the fast version make an indirect call using
syscall_fast_func function pointer so that libc has a chance to switch the
implementation. The default implementation is syscall_slow.

Location:

uspace/lib/libc/arch/ia32

Files:

• include/syscall.h (modified) (1 diff)
• src/syscall.S (modified) (3 diffs)

uspace/lib/libc/arch/ia32/include/syscall.h

@@ -40 +40 @@
 #include <kernel/syscall/syscall.h>
 
-#define __syscall0      __syscall_sysenter
-#define __syscall1      __syscall_sysenter
-#define __syscall2      __syscall_sysenter
-#define __syscall3      __syscall_sysenter
-#define __syscall4      __syscall_sysenter
-#define __syscall5      __syscall_int
-#define __syscall6      __syscall_int
+#define __syscall0      __syscall_fast_func
+#define __syscall1      __syscall_fast_func
+#define __syscall2      __syscall_fast_func
+#define __syscall3      __syscall_fast_func
+#define __syscall4      __syscall_fast_func
+#define __syscall5      __syscall_slow
+#define __syscall6      __syscall_slow
 
 extern sysarg_t
-__syscall_sysenter(const sysarg_t, const sysarg_t, const sysarg_t, const sysarg_t,
-     const sysarg_t, const sysarg_t, const syscall_t);
+(* __syscall_fast_func)(const sysarg_t, const sysarg_t, const sysarg_t,
+    const sysarg_t, const sysarg_t, const sysarg_t, const syscall_t);
 
 extern sysarg_t
-__syscall_int(const sysarg_t, const sysarg_t, const sysarg_t, const sysarg_t,
-     const sysarg_t, const sysarg_t, const syscall_t);
+__syscall_slow(const sysarg_t, const sysarg_t, const sysarg_t, const sysarg_t,
+    const sysarg_t, const sysarg_t, const syscall_t);
 
 #endif

uspace/lib/libc/arch/ia32/src/syscall.S

@@ -27 +27 @@
 #
 
+.data
+
+.global __syscall_fast_func
+__syscall_fast_func:
+        .long __syscall_slow
+
 .text
 
@@ -35 +41 @@
  * could benefit from this and not save unused registers on the stack.
  */
-.global __syscall_int
-__syscall_int:
+.global __syscall_slow
+__syscall_slow:
         pushl %ebx
         pushl %esi
@@ -64 +70 @@
  * segment, otherwise the SYSENTER wouldn't work in the first place).
  */
-.global __syscall_sysenter
-__syscall_sysenter:
+.global __syscall_fast
+__syscall_fast:
         pushl %ebx
         pushl %esi