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syscalls update

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This commit is contained in:
Blaise Tine 2024-04-09 03:40:18 -07:00
parent dd461468d3
commit bdcf2a0af0
1 changed files with 44 additions and 2 deletions
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46
kernel/src/vx_syscalls.c
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@ -67,7 +67,7 @@ void __init_tls(void) {
#ifdef HAVE_INITFINI_ARRAY
/* These magic symbols are provided by the linker. */
// These magic symbols are provided by the linker.
extern void (*__preinit_array_start []) (void) __attribute__((weak));
extern void (*__preinit_array_end []) (void) __attribute__((weak));
extern void (*__init_array_start []) (void) __attribute__((weak));
@ -77,7 +77,7 @@ extern void (*__init_array_end []) (void) __attribute__((weak));
extern void _init (void);
#endif
/* Iterate over all the init routines. */
// Iterate over all the init routines.
void __libc_init_array (void) {
size_t count;
size_t i;
@ -119,6 +119,48 @@ void __libc_fini_array (void) {
}
#endif
#define FEXIT_COUNT 64
static struct fl {
struct fl *next;
void (*f[FEXIT_COUNT])(void *);
void *a[FEXIT_COUNT];
} fexit_builtin, *head_builtin;
static int fexit_slot;
void __funcs_on_exit() {
void (*func)(void *), *arg;
for (; head_builtin; head_builtin=head_builtin->next, fexit_slot=FEXIT_COUNT) while(fexit_slot-->0) {
func = head_builtin->f[fexit_slot];
arg = head_builtin->a[fexit_slot];
func(arg);
}
}
void __cxa_finalize(void *dso) {}
int __cxa_atexit(void (*func)(void *), void *arg, void *dso) {
// Defer initialization of head so it can be in BSS
if (!head_builtin) head_builtin = &fexit_builtin;
// fail if function list is full
if (fexit_slot == FEXIT_COUNT)
return -1;
// Append function to the list.
head_builtin->f[fexit_slot] = func;
head_builtin->a[fexit_slot] = arg;
++fexit_slot;
return 0;
}
static void call(void *p) {
((void (*)(void))(uintptr_t)p)();
}
int atexit(void (*func)(void)) {
return __cxa_atexit(call, (void *)(uintptr_t)func, 0);
}
#ifdef __cplusplus
}
#endif