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Add support for nested system calls

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5752 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2013-03-17 16:13:28 +00:00
parent 4ebca78ada
commit 56ce985e7f
8 changed files with 140 additions and 38 deletions
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arch/arm/include/armv6-m/irq.h
+24 -6
View File
@@ -57,8 +57,14 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* If this is a kernel build, how many nested system calls should we support? */
/* IRQ Stack Frame Format:
#ifndef CONFIG_SYS_NNEST
# define CONFIG_SYS_NNEST 2
#endif
/* IRQ Stack Frame Format ***************************************************
*
* The following additional registers are stored by the interrupt handling
* logic.
@@ -140,11 +146,22 @@
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This structure represents the return state from a system call */
#ifdef CONFIG_NUTTX_KERNEL
struct xcpt_syscall_s
{
uint32_t excreturn; /* The EXC_RETURN value */
uint32_t sysreturn; /* The return PC */
};
#endif
/* The following structure is included in the TCB and defines the complete
* state of the thread.
*/
#ifndef __ASSEMBLY__
struct xcptcontext
{
#ifndef CONFIG_DISABLE_SIGNALS
@@ -168,16 +185,17 @@ struct xcptcontext
*/
uint32_t sigreturn;
# endif
#endif
#ifdef CONFIG_NUTTX_KERNEL
/* The following holds the return address and the exc_return value needed
* to return from a system call.
/* The following array holds the return address and the exc_return value
* needed to return from each nested system call.
*/
uint32_t excreturn;
uint32_t sysreturn;
uint8_t nsyscalls;
struct xcpt_syscall_s syscall[CONFIG_SYS_NNEST];
#endif
/* Register save area */
arch/arm/include/armv7-m/irq.h
+24 -6
View File
@@ -67,8 +67,14 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* If this is a kernel build, how many nested system calls should we support? */
/* Alternate register names */
#ifndef CONFIG_SYS_NNEST
# define CONFIG_SYS_NNEST 2
#endif
/* Alternate register names *************************************************/
#define REG_A1 REG_R0
#define REG_A2 REG_R1
@@ -98,12 +104,22 @@
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This structure represents the return state from a system call */
#ifdef CONFIG_NUTTX_KERNEL
struct xcpt_syscall_s
{
uint32_t excreturn; /* The EXC_RETURN value */
uint32_t sysreturn; /* The return PC */
};
#endif
/* The following structure is included in the TCB and defines the complete
* state of the thread.
*/
#ifndef __ASSEMBLY__
struct xcptcontext
{
#ifndef CONFIG_DISABLE_SIGNALS
@@ -131,16 +147,18 @@ struct xcptcontext
*/
uint32_t sigreturn;
# endif
#endif
#ifdef CONFIG_NUTTX_KERNEL
/* The following holds the return address and the exc_return value needed
* to return from a system call.
/* The following array holds the return address and the exc_return value
* needed to return from each nested system call.
*/
uint32_t excreturn;
uint32_t sysreturn;
uint8_t nsyscalls;
struct xcpt_syscall_s syscall[CONFIG_SYS_NNEST];
#endif
/* Register save area */