original files of m241

vxworks-6.9/target/h/arch/arm/syscallArm.h

@@ -0,0 +1,95 @@
+/* syscallArm.h - ARM specific System Call Infrastructure header */
+
+/*
+ * Copyright (c) 2003, 2005, 2007 Wind River Systems, Inc.
+ *
+ * The right to copy, distribute or otherwise make use of this software
+ * may be licensed only pursuant to the terms of an applicable Wind River
+ * license agreement. 
+ */
+
+/*
+modification history
+--------------------
+01g,03dec09,cww  Moved ARM specific macros from syscallLibP.h
+01f,04may07,zl   updated portable library build configuration.
+01e,04mar05,scm  _SYSCALL_USER_SP_CHECK break signals alt stack option...
+01d,23feb05,scm  re-assign "spare" to user link reg...
+01c,19nov03,cjj  replaced pStackLimit by pStackEnd in _SYSCALL_USER_SP_CHECK
+01b,14oct03,scm  enhanced, flushed out, and debugging.
+01a,03oct03,jb   written.
+*/
+
+/*
+DESCRIPTION
+This header contains ARM specific definitions and constants used by
+the System Call Infrastructure library.
+
+*/
+
+#ifndef __INCsyscallArmh
+#define __INCsyscallArmh
+
+#ifndef _ASMLANGUAGE
+#include <taskLib.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+    /* defines */
+
+#define SYSCALL_ENTRY_FRAME_SIZE	52
+
+#define _SYSCALL_USER_SP_CHECK(sp)
+
+    /* typedefs */
+
+#ifndef _ASMLANGUAGE
+    /* 
+     * The SYSCALL_ENTRY_STATE structure defines the saved machine state
+     * when the system call trap is taken. This information is architecture
+     * specific, and is used by the system call dispatcher to restart system
+     * calls that have been interrupted by the occurance of signals.
+     * System call restart is achieved by restoring the saved state at the
+     * time of the system call trap, and re-issuing the system call.
+     * Arguments to the system call are saved on the kernel stack, and 
+     * the address of that array is passed as an argument to the dispatcher.
+     * The layout of this structure must exactly match the ordering of members
+     * of the system call entry frame in src/arch/arm/syscallALib.s.
+     */
+
+typedef struct syscall_entry_state
+    {
+    ULONG    args[8];   /* argument list (r0-r3 and sp[0]-sp[3]) */
+    ULONG    scn;	/* System Call Number (SCN) in r12 */
+    ULONG    statusReg;	/* saved Status Register (spsr) */ 
+    INSTR    *pc;	/* Trap return address (lr) */
+    ULONG    *pUStack;  /* user-mode stack pointer */
+    ULONG    usrLnk;	/* user-mode link register */
+    } SYSCALL_ENTRY_STATE;
+
+
+#define ARM_RTP_STACK_OFFSET     12  /* ARM pushes r2, SCn, and lr onto */ 
+                                     /* stack prior to signal handling */
+#define SYSCALL_USER_SP_GET(tid) (char *) \
+	(((SYSCALL_ENTRY_STATE *) ((((WIND_TCB *)(tid))->pExcStackBase) - \
+		   (sizeof(SYSCALL_ENTRY_STATE)+ARM_RTP_STACK_OFFSET)))->pUStack)
+
+#define SYSCALL_USER_PC_GET(tid) (void *) \
+	(((SYSCALL_ENTRY_STATE *) ((((WIND_TCB *)(tid))->pExcStackBase) - \
+		   (sizeof(SYSCALL_ENTRY_STATE)+ARM_RTP_STACK_OFFSET)))->pc)
+
+#define SYSCALL_USER_SCN_GET(tid) (int) \
+	(((SYSCALL_ENTRY_STATE *) ((((WIND_TCB *)(tid))->pExcStackBase) - \
+		   (sizeof(SYSCALL_ENTRY_STATE)+ARM_RTP_STACK_OFFSET)))->scn)
+
+#endif /* _ASMLANGUAGE */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCsyscallArmh */