2 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
11 #include <sys/resource.h>
15 #include "user_util.h"
16 #include "kern_util.h"
18 #include "signal_user.h"
22 #include "choose-mode.h"
23 #include "uml-config.h"
25 /* Set in set_stklim, which is called from main and __wrap_malloc.
26 * __wrap_malloc only calls it if main hasn't started.
28 unsigned long stacksizelim;
33 #define PGD_BOUND (4 * 1024 * 1024)
34 #define STACKSIZE (8 * 1024 * 1024)
35 #define THREAD_NAME_LEN (256)
37 static void set_stklim(void)
41 if(getrlimit(RLIMIT_STACK, &lim) < 0){
45 if((lim.rlim_cur == RLIM_INFINITY) || (lim.rlim_cur > STACKSIZE)){
46 lim.rlim_cur = STACKSIZE;
47 if(setrlimit(RLIMIT_STACK, &lim) < 0){
52 stacksizelim = (lim.rlim_cur + PGD_BOUND - 1) & ~(PGD_BOUND - 1);
55 static __init void do_uml_initcalls(void)
59 call = &__uml_initcall_start;
60 while (call < &__uml_initcall_end){;
66 static void last_ditch_exit(int sig)
68 CHOOSE_MODE(kmalloc_ok = 0, (void) 0);
69 signal(SIGINT, SIG_DFL);
70 signal(SIGTERM, SIG_DFL);
71 signal(SIGHUP, SIG_DFL);
76 extern int uml_exitcode;
78 int main(int argc, char **argv, char **envp)
84 /* Enable all signals except SIGIO - in some environments, we can
85 * enter with some signals blocked
89 sigaddset(&mask, SIGIO);
90 if(sigprocmask(SIG_SETMASK, &mask, NULL) < 0){
91 perror("sigprocmask");
95 #ifdef UML_CONFIG_MODE_TT
96 /* Allocate memory for thread command lines */
97 if(argc < 2 || strlen(argv[1]) < THREAD_NAME_LEN - 1){
99 char padding[THREAD_NAME_LEN] = {
100 [ 0 ... THREAD_NAME_LEN - 2] = ' ', '\0'
103 new_argv = malloc((argc + 2) * sizeof(char*));
105 perror("Allocating extended argv");
109 new_argv[0] = argv[0];
110 new_argv[1] = padding;
112 for(i = 2; i <= argc; i++)
113 new_argv[i] = argv[i - 1];
114 new_argv[argc + 1] = NULL;
116 execvp(new_argv[0], new_argv);
117 perror("execing with extended args");
122 linux_prog = argv[0];
126 if((new_argv = malloc((argc + 1) * sizeof(char *))) == NULL){
127 perror("Mallocing argv");
131 if((new_argv[i] = strdup(argv[i])) == NULL){
132 perror("Mallocing an arg");
136 new_argv[argc] = NULL;
138 set_handler(SIGINT, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1);
139 set_handler(SIGTERM, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1);
140 set_handler(SIGHUP, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1);
143 ret = linux_main(argc, argv);
148 execvp(new_argv[0], new_argv);
149 perror("Failed to exec kernel");
153 return(uml_exitcode);
156 #define CAN_KMALLOC() \
157 (kmalloc_ok && CHOOSE_MODE((getpid() != tracing_pid), 1))
159 extern void *__real_malloc(int);
161 void *__wrap_malloc(int size)
164 return(um_kmalloc(size));
166 return(__real_malloc(size));
169 void *__wrap_calloc(int n, int size)
171 void *ptr = __wrap_malloc(n * size);
173 if(ptr == NULL) return(NULL);
174 memset(ptr, 0, n * size);
178 extern void __real_free(void *);
180 void __wrap_free(void *ptr)
182 if(CAN_KMALLOC()) kfree(ptr);
183 else __real_free(ptr);
187 * Overrides for Emacs so that we follow Linus's tabbing style.
188 * Emacs will notice this stuff at the end of the file and automatically
189 * adjust the settings for this buffer only. This must remain at the end
191 * ---------------------------------------------------------------------------
193 * c-file-style: "linux"