syscalls.c File Reference

Syscalls management in SPARC. More...

#include <errno.h>
#include <core/debug.h>
#include <core/syscall.h>
#include <core/partition.h>
#include <types.h>
#include <libc.h>
#include "thread.h"
#include "context_offset.h"
#include "traps.h"
#include "arch.h"

Go to the source code of this file.

Functions
void	pok_arch_sc_int (void)
void	pok_syscalls_init (void)

---

Detailed Description

Syscalls management in SPARC.

Author:

Fabien Chouteau

Definition in file syscalls.c.

---

Function Documentation

void pok_arch_sc_int

(

void

)

Syscalls handler.

Definition at line 39 of file syscalls.c.

{
  uint8_t *ctx = (uint8_t *)pok_arch_sp;
  uint32_t num = *(uint32_t *)((char *)ctx - I0_OFFSET);
  uint8_t              part_id;
  pok_syscall_info_t   syscall_info;
  pok_ret_t            syscall_ret;
  pok_syscall_args_t   syscall_args;
  pok_syscall_id_t     syscall_id;


  part_id  = pok_current_partition;

  /* prepare syscall_info */
  syscall_info.partition = part_id;
  syscall_info.base_addr = pok_partitions[part_id].base_addr;
  syscall_info.thread    = POK_SCHED_CURRENT_THREAD;

  /* prepare syscall_args */
  syscall_args.arg1 = *(uint32_t *)(ctx - I1_OFFSET);
  syscall_args.arg2 = *(uint32_t *)(ctx - I2_OFFSET);
  syscall_args.arg3 = *(uint32_t *)(ctx - I3_OFFSET);
  syscall_args.arg4 = *(uint32_t *)(ctx - I4_OFFSET);
  syscall_args.arg5 = *(uint32_t *)(ctx - I5_OFFSET);

  syscall_args.nargs = 5;

  /* prepare syscall_id */
  syscall_id = (pok_syscall_id_t) num;

  /*
   * No pointer check needed, syscall_args is allocated in kernel stack.
   */
  syscall_ret = pok_core_syscall (syscall_id, &syscall_args, &syscall_info);

  *(uint32_t *)(ctx - I0_OFFSET) = syscall_ret;
  *(uint32_t *)(ctx - PC_OFFSET) += 4; // skip "ta" instruction
  *(uint32_t *)(ctx - NPC_OFFSET) += 4;
}

void pok_syscalls_init

(

void

)

Syscalls initialization. Just register the syscall handler.

Definition at line 83 of file syscalls.c.

{
  pok_arch_event_register(SPARC_TRAP_SYSCALL_BASE + 0x2, pok_arch_sc_int);
}