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https://github.com/checkpoint-restore/criu.git
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6e4d05853d
When infecting victim we construct sigframe to be able to self-rectore it in case if something goes wrong. But in case is a targer been using alternative stack for signal handling it will be missed in sigframe since we don't fetch it. Thus add fetching sas on infection stage and put it into signal frame early. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
70 lines
2 KiB
C
70 lines
2 KiB
C
#ifndef __COMPEL_INFECT_PRIV_H__
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#define __COMPEL_INFECT_PRIV_H__
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#include <stdbool.h>
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#define BUILTIN_SYSCALL_SIZE 8
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struct thread_ctx {
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k_rtsigset_t sigmask;
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user_regs_struct_t regs;
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};
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/* parasite control block */
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struct parasite_ctl {
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int rpid; /* Real pid of the victim */
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void *remote_map;
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void *local_map;
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void *sigreturn_addr; /* A place for the breakpoint */
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unsigned long map_length;
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struct infect_ctx ictx;
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/* thread leader data */
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bool daemonized;
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struct thread_ctx orig;
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void *rstack; /* thread leader stack*/
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struct rt_sigframe *sigframe;
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struct rt_sigframe *rsigframe; /* address in a parasite */
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void *r_thread_stack; /* stack for non-leader threads */
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unsigned long parasite_ip; /* service routine start ip */
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unsigned int *addr_cmd; /* addr for command */
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void *addr_args; /* address for arguments */
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unsigned long args_size;
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int tsock; /* transport socket for transferring fds */
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struct parasite_blob_desc pblob;
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};
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struct parasite_thread_ctl {
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int tid;
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struct parasite_ctl *ctl;
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struct thread_ctx th;
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};
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#define MEMFD_FNAME "CRIUMFD"
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#define MEMFD_FNAME_SZ sizeof(MEMFD_FNAME)
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struct ctl_msg;
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int parasite_wait_ack(int sockfd, unsigned int cmd, struct ctl_msg *m);
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extern void parasite_setup_regs(unsigned long new_ip, void *stack, user_regs_struct_t *regs);
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extern void *remote_mmap(struct parasite_ctl *ctl,
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void *addr, size_t length, int prot,
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int flags, int fd, off_t offset);
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extern bool arch_can_dump_task(struct parasite_ctl *ctl);
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extern int get_task_regs(pid_t pid, user_regs_struct_t *regs, save_regs_t save, void *arg);
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extern int arch_fetch_sas(struct parasite_ctl *ctl, struct rt_sigframe *s);
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extern int sigreturn_prep_regs_plain(struct rt_sigframe *sigframe,
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user_regs_struct_t *regs,
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user_fpregs_struct_t *fpregs);
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extern int sigreturn_prep_fpu_frame_plain(struct rt_sigframe *sigframe,
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struct rt_sigframe *rsigframe);
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extern int compel_execute_syscall(struct parasite_ctl *ctl,
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user_regs_struct_t *regs, const char *code_syscall);
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#endif
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