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mcctrl: lookup unexported symbols at runtime

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Instead of parsing System.map, use kallsyms_lookup_name() to
get unexported symbols addresses at module loading time.

This lets mckernel work with kaslr enabled (it gets enabled by
default from el7.5 onwards)

Change-Id: Ie4349fc1145ebce44f37f1f40c16f9d75584074d
This commit is contained in:
Dominique Martinet
2018-08-03 13:12:08 +09:00
committed by Masamichi Takagi
parent 794684985f
commit e8f8660b73
10 changed files with 151 additions and 672 deletions
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18
executer/kernel/mcctrl/mcctrl.h
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@@ -400,6 +400,23 @@ int mcctrl_ikc_send_wait(ihk_os_t os, int cpu, struct ikc_scd_packet *pisp,
ihk_os_t osnum_to_os(int n);
/* look up symbols, plus arch-specific ones */
extern int (*mcctrl_sys_mount)(char *dev_name, char *dir_name, char *type,
unsigned long flags, void *data);
extern int (*mcctrl_sys_umount)(char *dir_name, int flags);
extern int (*mcctrl_sys_unshare)(unsigned long unshare_flags);
extern long (*mcctrl_sched_setaffinity)(pid_t pid,
const struct cpumask *in_mask);
extern int (*mcctrl_sched_setscheduler_nocheck)(struct task_struct *p,
int policy,
const struct sched_param *param);
extern ssize_t (*mcctrl_sys_readlink)(const char *path, char *buf,
size_t bufsiz);
extern void (*mcctrl_zap_page_range)(struct vm_area_struct *vma,
unsigned long start,
unsigned long size,
struct zap_details *details);
/* syscall.c */
void pager_add_process(void);
void pager_remove_process(struct mcctrl_per_proc_data *ppd);
@@ -504,6 +521,7 @@ struct vdso {
int reserve_user_space(struct mcctrl_usrdata *usrdata, unsigned long *startp,
unsigned long *endp);
void get_vdso_info(ihk_os_t os, long vdso_pa);
int arch_symbols_init(void);
struct get_cpu_mapping_req {
int busy; /* INOUT: */