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uti: syscall_backward: Use kmalloc area to pass syscall arguments

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Change-Id: I478a9b40b75f3d1d68c4446810a6236fe2f3a96c
Fujitsu: POSTK_DEBUG_ARCH_DEP_106
Refs: #1320
This commit is contained in:
Masamichi Takagi
2019-07-18 04:19:08 +00:00
parent 06af2d62c6
commit 207eba93ea
1 changed files with 14 additions and 10 deletions
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24
executer/kernel/mcctrl/syscall.c
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@ -280,15 +280,16 @@ long syscall_backward(struct mcctrl_usrdata *usrdata, int num,
struct mcctrl_per_proc_data *ppd; struct mcctrl_per_proc_data *ppd;
struct mcctrl_per_thread_data *ptd; struct mcctrl_per_thread_data *ptd;
unsigned long phys; unsigned long phys;
struct syscall_request _request[2]; struct syscall_request *request = NULL;
struct syscall_request *request;
int retry; int retry;
if (((unsigned long)_request ^ (unsigned long)(_request + 1)) & request = kmalloc(sizeof(struct syscall_request), GFP_ATOMIC);
~(PAGE_SIZE -1)) if (!request) {
request = _request + 1; printk("%s: ERROR: allocating request\n", __func__);
else syscall_ret = -ENOMEM;
request = _request; goto no_ppd;
}
request->number = num; request->number = num;
request->args[0] = arg1; request->args[0] = arg1;
request->args[1] = arg2; request->args[1] = arg2;
@ -303,8 +304,9 @@ long syscall_backward(struct mcctrl_usrdata *usrdata, int num,
if (!ppd) { if (!ppd) {
kprintf("%s: ERROR: no per-process structure for PID %d??\n", kprintf("%s: ERROR: no per-process structure for PID %d??\n",
__FUNCTION__, task_tgid_vnr(current)); __func__, task_tgid_vnr(current));
return -EINVAL; syscall_ret = -EINVAL;
goto no_ppd;
} }
ptd = mcctrl_get_per_thread_data(ppd, current); ptd = mcctrl_get_per_thread_data(ppd, current);
@ -452,11 +454,13 @@ out:
out_put_ppd: out_put_ppd:
mcctrl_put_per_thread_data(ptd); mcctrl_put_per_thread_data(ptd);
pr_ptd("put", task_pid_vnr(current), ptd); pr_ptd("put", task_pid_vnr(current), ptd);
no_ptd: no_ptd:
dprintk("%s: tid: %d, syscall: %d, syscall_ret: %lx\n", dprintk("%s: tid: %d, syscall: %d, syscall_ret: %lx\n",
__FUNCTION__, task_pid_vnr(current), num, syscall_ret); __FUNCTION__, task_pid_vnr(current), num, syscall_ret);
mcctrl_put_per_proc_data(ppd); mcctrl_put_per_proc_data(ppd);
no_ppd:
kfree(request);
return syscall_ret; return syscall_ret;
} }