diff options
Diffstat (limited to 'nuttx/include/sys/syscall.h')
| -rw-r--r-- | nuttx/include/sys/syscall.h | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/nuttx/include/sys/syscall.h b/nuttx/include/sys/syscall.h index 67471e897..c4527c9fa 100644 --- a/nuttx/include/sys/syscall.h +++ b/nuttx/include/sys/syscall.h @@ -42,15 +42,18 @@ ****************************************************************************/ #include <nuttx/config.h> +#include <stdint.h> /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ -/* Reserve the first system calls for platform-specific usage */ +/* Reserve the first system calls for platform-specific usage if so + * configured. + */ #ifndef CONFIG_CONFIG_SYS_RESERVED -# define CONFIG_SYS_RESERVED (32) +# define CONFIG_SYS_RESERVED (0) #endif /* System call numbers @@ -89,7 +92,7 @@ /* The following can be individually enabled */ -#ifdef CONFIG_SCHED_ATEXT +#ifdef CONFIG_SCHED_ATEXIT # define SYS_atexit __SYS_atexit # define __SYS_waitpaid (__SYS_atexit+1) #else @@ -302,8 +305,27 @@ * Public Type Definitions ****************************************************************************/ +/* This is the union of all possible stub function types */ + +union syscall_stubfunc_u +{ + uintptr_t (*stub0)(unsigned int nbr); + uintptr_t (*stub1)(unsigned int nbr, uintptr_t parm1); + uintptr_t (*stub2)(unsigned int nbr, uintptr_t parm1, uintptr_t parm2); + uintptr_t (*stub3)(unsigned int nbr, uintptr_t parm1, uintptr_t parm2, + uintptr_t parm3); + uintptr_t (*stub4)(unsigned int nbr, uintptr_t parm1, uintptr_t parm2, + uintptr_t parm3, uintptr_t parm4); + uintptr_t (*stub5)(unsigned int nbr, uintptr_t parm1, uintptr_t parm2, + uintptr_t parm3, uintptr_t parm4, + uintptr_t parm5); + uintptr_t (*stub6)(unsigned int nbr, uintptr_t parm1, uintptr_t parm2, + uintptr_t parm3, uintptr_t parm4, + uintptr_t parm5, uintptr_t parm6); +}; + /**************************************************************************** - * Public Functions + * Public Data ****************************************************************************/ #ifdef __cplusplus @@ -313,6 +335,18 @@ extern "C" { #define EXTERN extern #endif +/* Stub lookup tables. Each table is indexed by the system call numbers + * defined above. Given the system call number, the corresponding entry in + * these tables describes how to call the stub dispatch function. + */ + +EXTERN const union syscall_stubfunc_u *g_stublookup[SYS_nsyscalls]; +EXTERN const uint8_t g_stubnparms[SYS_nsyscalls]; + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + #undef EXTERN #ifdef __cplusplus } |