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67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/*
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* l4/posix glue for execve()
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <sys/shm.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <l4lib/arch/syscalls.h>
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#include <l4lib/arch/syslib.h>
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#include <l4lib/ipcdefs.h>
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#include <l4lib/utcb.h>
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#include <fcntl.h>
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#include <l4/macros.h>
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#include INC_GLUE(memory.h)
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struct sys_execve_args {
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char *path;
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char **argv;
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char **envp;
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};
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static inline int l4_execve(const char *pathname, char *const argv[], char *const envp[])
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{
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int err = 0;
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write_mr(L4SYS_ARG0, (unsigned long)pathname);
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write_mr(L4SYS_ARG1, (unsigned long)argv);
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write_mr(L4SYS_ARG2, (unsigned long)envp);
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/* Call pager with open() request. Check ipc error. */
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if ((err = l4_sendrecv(PAGER_TID, PAGER_TID, L4_IPC_TAG_EXECVE)) < 0) {
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printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
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return err;
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}
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/* Check if syscall itself was successful */
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if ((err = l4_get_retval()) < 0) {
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printf("%s: OPEN Error: %d.\n", __FUNCTION__, err);
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return err;
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}
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return err;
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}
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int execve(const char *pathname, char *const argv[], char *const envp[])
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{
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int ret;
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ret = l4_execve(pathname, argv, envp);
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/* If error, return positive error code */
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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/* else return value */
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return ret;
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}
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