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Add dev_delhandle() syscall to delete a device handle from process resources

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This commit is contained in:
Kamil Kowalczyk
2025-11-08 16:24:04 +01:00
parent 2fa77d073f
commit e0162e9e0b
6 changed files with 26 additions and 0 deletions
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18
kernel/syscall/dev.c
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@ -135,3 +135,21 @@ int32_t SYSCALL4(sys_dev_cmd, dev1, cmd1, argbuf1, len1) {
done: done:
return ret; return ret;
} }
int32_t SYSCALL1(sys_dev_delhandle, dev1) {
uint64_t *devh = (uint64_t *)dev1;
int32_t ret = E_OK;
if (devh == NULL) {
return E_NOMEMORY;
}
spinlock_acquire(&PROCS.spinlock);
Proc *proc = NULL;
LL_FINDPROP(PROCS.procs, proc, pid, _caller_pid);
spinlock_release(&PROCS.spinlock);
proc->devs[*devh] = NULL;
return ret;
}

1
kernel/syscall/dev.h
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@ -9,5 +9,6 @@ int32_t SYSCALL2(sys_dev_gethandle, dev1, devname1);
int32_t SYSCALL0(sys_dev_listsize); int32_t SYSCALL0(sys_dev_listsize);
int32_t SYSCALL2(sys_dev_stat, devstat1, idx1); int32_t SYSCALL2(sys_dev_stat, devstat1, idx1);
int32_t SYSCALL4(sys_dev_cmd, dev1, cmd1, argbuf1, len1); int32_t SYSCALL4(sys_dev_cmd, dev1, cmd1, argbuf1, len1);
int32_t SYSCALL1(sys_dev_delhandle, dev1);
#endif // SYSCALL_DEV_H_ #endif // SYSCALL_DEV_H_

1
kernel/syscall/syscall.c
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@ -64,6 +64,7 @@ SyscallFn SYSCALL_TABLE[SYSCALLS_MAX] = {
[SYS_DEV_LISTSIZE] = &sys_dev_listsize, [SYS_DEV_LISTSIZE] = &sys_dev_listsize,
[SYS_DEV_STAT] = &sys_dev_stat, [SYS_DEV_STAT] = &sys_dev_stat,
[SYS_DEV_CMD] = &sys_dev_cmd, [SYS_DEV_CMD] = &sys_dev_cmd,
[SYS_DEV_DELHANDLE] = &sys_dev_delhandle,
[SYS_TIME] = &sys_time, [SYS_TIME] = &sys_time,
}; };

1
share/sysdefs/syscall.h
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@ -37,6 +37,7 @@
#define SYS_DEV_LISTSIZE 34 #define SYS_DEV_LISTSIZE 34
#define SYS_DEV_STAT 35 #define SYS_DEV_STAT 35
#define SYS_DEV_CMD 36 #define SYS_DEV_CMD 36
#define SYS_DEV_DELHANDLE 39
#define SYS_TIME 38 #define SYS_TIME 38
#endif // SHARE_HDRS_SYSCALL_H_ #endif // SHARE_HDRS_SYSCALL_H_

4
ulib/system/system.c
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@ -151,6 +151,10 @@ int32_t dev_cmd(Dev_t *dev, uint64_t cmd, void *buf, size_t len) {
return syscall(SYS_DEV_CMD, (uint64_t)dev, (uint64_t)cmd, (uint64_t)buf, (uint64_t)len, 0, 0); return syscall(SYS_DEV_CMD, (uint64_t)dev, (uint64_t)cmd, (uint64_t)buf, (uint64_t)len, 0, 0);
} }
int32_t dev_delhandle(Dev_t *dev) {
return syscall(SYS_DEV_DELHANDLE, (uint64_t)dev, 0, 0, 0, 0, 0);
}
int32_t time(Time *time) { int32_t time(Time *time) {
return syscall(SYS_TIME, (uint64_t)time, 0, 0, 0, 0, 0); return syscall(SYS_TIME, (uint64_t)time, 0, 0, 0, 0, 0);
} }

1
ulib/system/system.h
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@ -46,6 +46,7 @@ int32_t dev_gethandle(Dev_t *dev, char *name);
int32_t dev_listsize(void); int32_t dev_listsize(void);
int32_t dev_stat(DevStat *devstatbuf, size_t idx); int32_t dev_stat(DevStat *devstatbuf, size_t idx);
int32_t dev_cmd(Dev_t *dev, uint64_t cmd, void *buf, size_t len); int32_t dev_cmd(Dev_t *dev, uint64_t cmd, void *buf, size_t len);
int32_t dev_delhandle(Dev_t *dev);
int32_t time(Time *time); int32_t time(Time *time);
#endif // ULIB_SYSTEM_SYSTEM_H_ #endif // ULIB_SYSTEM_SYSTEM_H_