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authorManuel Novoa III <mjn3@codepoet.org>2001-02-19 00:24:52 +0000
committerManuel Novoa III <mjn3@codepoet.org>2001-02-19 00:24:52 +0000
commitdfe2d42547de8197f850f3ff0dfdc3caa4682518 (patch)
tree0b2969dbdd6c65f1fb5832e25d28bffa9570084a /libc/stdlib
parent438aac726283dfffa6a5cf84b4acf6df0250af94 (diff)
Create __uClibc_main to handle what can be done in C instead of each arch's
respective crt0.S. crt0.S should now only be responsible for setting things up to call __uClibc_main(argc, argv, envp), which will do any other necessary setup (setting global __environ, stdio init, etc), call main, and exit. This should ease both maintainance and porting.
Diffstat (limited to 'libc/stdlib')
-rw-r--r--libc/stdlib/abort.c9
-rw-r--r--libc/stdlib/atexit.c40
2 files changed, 31 insertions, 18 deletions
diff --git a/libc/stdlib/abort.c b/libc/stdlib/abort.c
index 23510e913..7b7d6bb50 100644
--- a/libc/stdlib/abort.c
+++ b/libc/stdlib/abort.c
@@ -25,8 +25,8 @@ Cambridge, MA 02139, USA. */
#include <signal.h>
#include <errno.h>
-typedef void (*vfuncp) ();
-extern vfuncp __cleanup;
+typedef void (*vfuncp) (void);
+extern vfuncp __uClibc_cleanup;
extern void _exit __P((int __status)) __attribute__ ((__noreturn__));
/* Cause an abnormal program termination with core-dump. */
@@ -38,8 +38,9 @@ void abort(void)
sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL);
}
- if (__cleanup)
- __cleanup();
+ if (__uClibc_cleanup) { /* Not already executing __uClibc_cleanup. */
+ __uClibc_cleanup();
+ }
while (1)
if (raise(SIGABRT))
diff --git a/libc/stdlib/atexit.c b/libc/stdlib/atexit.c
index c720d4e90..b18e7951d 100644
--- a/libc/stdlib/atexit.c
+++ b/libc/stdlib/atexit.c
@@ -4,45 +4,58 @@
*/
/*
- * Manuel Novoa III Dec 2000
+ * Dec 2000 Manuel Novoa III
*
- * Modifications:
* Made atexit handling conform to standards... i.e. no args.
* Removed on_exit since it did not match gnu libc definition.
* Combined atexit and __do_exit into one object file.
+ *
+ * Feb 2000 Manuel Novoa III
+ *
+ * Reworked file after addition of __uClibc_main.
+ * Changed name of __do_exit to atexit_handler.
+ * Changed name of __cleanup to __uClibc_cleanup.
+ * Moved declaration of __uClibc_cleanup to __uClibc_main
+ * where it is initialized with (possibly weak alias)
+ * __stdio_close_all.
*/
#include <stdlib.h>
#include <errno.h>
typedef void (*vfuncp) (void);
-extern vfuncp __cleanup;
+extern vfuncp __uClibc_cleanup;
#ifdef L_atexit
+extern void __stdio_close_all(void);
+
static vfuncp __atexit_table[__UCLIBC_MAX_ATEXIT];
static int __atexit_count = 0;
-static void __do_exit(void)
+static void atexit_handler(void)
{
- int count = __atexit_count - 1;
+ int count;
- __atexit_count = -1; /* ensure no more will be added */
- __cleanup = 0; /* Calling exit won't re-do this */
+ /*
+ * Guard against more functions being added and againt being reinvoked.
+ */
+ __uClibc_cleanup = 0;
/* In reverse order */
- for (; count >= 0; count--) {
+ for (count = __atexit_count ; count-- ; ) {
(*__atexit_table[count])();
}
+ __stdio_close_all();
}
int atexit(vfuncp ptr)
{
- if ((__atexit_count < 0) || (__atexit_count >= __UCLIBC_MAX_ATEXIT)) {
+ if ((__uClibc_cleanup == 0) || (__atexit_count >= __UCLIBC_MAX_ATEXIT)) {
errno = ENOMEM;
return -1;
}
if (ptr) {
- __cleanup = __do_exit;
+ __uClibc_cleanup = atexit_handler;
__atexit_table[__atexit_count++] = ptr;
}
return 0;
@@ -50,12 +63,11 @@ int atexit(vfuncp ptr)
#endif
#ifdef L_exit
-vfuncp __cleanup = 0;
-
void exit(int rv)
{
- if (__cleanup)
- __cleanup();
+ if (__uClibc_cleanup) { /* Not already executing __uClibc_cleanup. */
+ __uClibc_cleanup();
+ }
_exit(rv);
}
#endif