[CRIU] [PATCH 12/15] parasite: refactor macros for compat/native usage
Dmitry Safonov
dsafonov at virtuozzo.com
Mon Apr 11 05:19:26 PDT 2016
In code they yet use native parasite type, but in definition
this parameter is not used (will be used at the next patch).
Signed-off-by: Dmitry Safonov <dsafonov at virtuozzo.com>
---
criu/cr-restore.c | 4 ++--
criu/include/parasite.h | 5 ++++-
criu/include/restorer.h | 3 +--
criu/parasite-syscall.c | 13 +++++++------
criu/pie/Makefile | 8 +++++++-
criu/pie/pie-relocs.h | 18 ++++++++----------
6 files changed, 29 insertions(+), 22 deletions(-)
diff --git a/criu/cr-restore.c b/criu/cr-restore.c
index 93dc5c91b197..b337cf36cce8 100644
--- a/criu/cr-restore.c
+++ b/criu/cr-restore.c
@@ -2636,7 +2636,7 @@ static int prepare_restorer_blob(void)
* in turn will lead to set-exe-file prctl to fail with EBUSY.
*/
- restorer_len = pie_size(restorer_blob);
+ restorer_len = pie_size(restorer);
restorer = mmap(NULL, restorer_len,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON, 0, 0);
@@ -2660,7 +2660,7 @@ static int remap_restorer_blob(void *addr)
return -1;
}
- ELF_RELOCS_APPLY_RESTORER(addr, addr);
+ ELF_RELOCS_APPLY(restorer, addr, addr);
return 0;
}
diff --git a/criu/include/parasite.h b/criu/include/parasite.h
index 97e334d77689..52e3c634d66b 100644
--- a/criu/include/parasite.h
+++ b/criu/include/parasite.h
@@ -269,7 +269,10 @@ struct parasite_dump_cgroup_args {
};
/* the parasite prefix is added by gen_offsets.sh */
-#define parasite_sym(pblob, name) ((void *)(pblob) + parasite_blob_offset__##name)
+#define __pblob_offset(ptype, symbol) \
+ parasite ## _blob_offset__ ## symbol
+#define parasite_sym(pblob, ptype, symbol) \
+ ((void *)(pblob) + __pblob_offset(ptype, symbol))
#endif /* !__ASSEMBLY__ */
diff --git a/criu/include/restorer.h b/criu/include/restorer.h
index d25fe8523dc3..b00c212e02fb 100644
--- a/criu/include/restorer.h
+++ b/criu/include/restorer.h
@@ -237,7 +237,6 @@ enum {
/* the restorer_blob_offset__ prefix is added by gen_offsets.sh */
#define __blob_offset(name) restorer_blob_offset__ ## name
-#define _blob_offset(name) __blob_offset(name)
-#define restorer_sym(rblob, name) (void*)(rblob + _blob_offset(name))
+#define restorer_sym(rblob, name) (void*)(rblob + __blob_offset(name))
#endif /* __CR_RESTORER_H__ */
diff --git a/criu/parasite-syscall.c b/criu/parasite-syscall.c
index 2c599950b75d..8f4c04b99553 100644
--- a/criu/parasite-syscall.c
+++ b/criu/parasite-syscall.c
@@ -1329,6 +1329,7 @@ static int parasite_start_daemon(struct parasite_ctl *ctl, struct pstree_item *i
return 0;
}
+/* FIXME: parasite native/compat */
struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
struct vm_area_list *vma_area_list)
{
@@ -1354,7 +1355,7 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
ctl->args_size = round_up(parasite_args_size, PAGE_SIZE);
parasite_args_size = PARASITE_ARG_SIZE_MIN; /* reset for next task */
- map_exchange_size = pie_size(parasite_blob) + ctl->args_size;
+ map_exchange_size = pie_size(parasite) + ctl->args_size;
map_exchange_size += RESTORE_STACK_SIGFRAME + PARASITE_STACK_SIZE;
if (item->nr_threads > 1)
map_exchange_size += PARASITE_STACK_SIZE;
@@ -1368,14 +1369,14 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
pr_info("Putting parasite blob into %p->%p\n", ctl->local_map, ctl->remote_map);
memcpy(ctl->local_map, parasite_blob, sizeof(parasite_blob));
- ELF_RELOCS_APPLY_PARASITE(ctl->local_map, ctl->remote_map);
+ ELF_RELOCS_APPLY(parasite, ctl->local_map, ctl->remote_map);
/* Setup the rest of a control block */
- ctl->parasite_ip = (unsigned long)parasite_sym(ctl->remote_map, __export_parasite_head_start);
- ctl->addr_cmd = parasite_sym(ctl->local_map, __export_parasite_cmd);
- ctl->addr_args = parasite_sym(ctl->local_map, __export_parasite_args);
+ ctl->parasite_ip = (unsigned long)parasite_sym(ctl->remote_map, native, __export_parasite_head_start);
+ ctl->addr_cmd = parasite_sym(ctl->local_map, native, __export_parasite_cmd);
+ ctl->addr_args = parasite_sym(ctl->local_map, native, __export_parasite_args);
- p = pie_size(parasite_blob) + ctl->args_size;
+ p = pie_size(parasite) + ctl->args_size;
ctl->rsigframe = ctl->remote_map + p;
ctl->sigframe = ctl->local_map + p;
diff --git a/criu/pie/Makefile b/criu/pie/Makefile
index 0bd03900424a..55a9cff7a356 100644
--- a/criu/pie/Makefile
+++ b/criu/pie/Makefile
@@ -77,7 +77,13 @@ $(obj)/%.built-in.bin.o: $(obj)/%.built-in.o $(obj)/native.lib.a $(obj)/$(PIELDS
$(obj)/%-blob.h: $(obj)/%.built-in.bin.o $(obj)/$(PIELDS) $(SRC_DIR)/compel/compel
$(call msg-gen, $@)
- $(Q) $(SRC_DIR)/compel/compel piegen -f $< -v $(call target-name,$@)_relocs -p $(call target-name,$@)_blob_offset__ -s $(call target-name,$@)_blob -u $(SRC_DIR)/compel/include/uapi -o $@ $(piegen_stdout)
+ $(Q) $(SRC_DIR)/compel/compel piegen -f $< \
+ -v $(call target-name,$@)_relocs \
+ -p $(call target-name,$@)_blob_offset__ \
+ -s $(call target-name,$@)_blob \
+ -r $(call target-name,$@)_nr_gotpcrel \
+ -u $(SRC_DIR)/compel/include/uapi \
+ -o $@ $(piegen_stdout)
else
diff --git a/criu/pie/pie-relocs.h b/criu/pie/pie-relocs.h
index bd313f8bfcba..9af029eb8bc0 100644
--- a/criu/pie/pie-relocs.h
+++ b/criu/pie/pie-relocs.h
@@ -10,19 +10,17 @@
extern __maybe_unused void elf_relocs_apply(void *mem, void *vbase, size_t size,
elf_reloc_t *elf_relocs, size_t nr_relocs);
-#define pie_size(__blob_name) (round_up(sizeof(__blob_name) + nr_gotpcrel * sizeof(long), page_size()))
-#define ELF_RELOCS_APPLY_PARASITE(__mem, __vbase) \
- elf_relocs_apply(__mem, __vbase, sizeof(parasite_blob), \
- parasite_relocs, ARRAY_SIZE(parasite_relocs))
-#define ELF_RELOCS_APPLY_RESTORER(__mem, __vbase) \
- elf_relocs_apply(__mem, __vbase, sizeof(restorer_blob), \
- restorer_relocs, ARRAY_SIZE(restorer_relocs))
+/* FIXME: native/compat pie's pie_size(), ELF_RELOCS_APPLY() */
+#define pie_size(__pie_name) (round_up(sizeof(__pie_name##_blob) + \
+ __pie_name ## _nr_gotpcrel * sizeof(long), page_size()))
+#define ELF_RELOCS_APPLY(__pie_name, __mem, __vbase) \
+ elf_relocs_apply(__mem, __vbase, sizeof(__pie_name##_blob), \
+ __pie_name##_relocs, ARRAY_SIZE(__pie_name##_relocs))
#else
-#define pie_size(__blob_name) (round_up(sizeof(__blob_name), page_size()))
-#define ELF_RELOCS_APPLY_PARASITE(__mem, __vbase)
-#define ELF_RELOCS_APPLY_RESTORER(__mem, __vbase)
+#define pie_size(__pie_name) (round_up(sizeof(__pie_name##_blob), page_size()))
+#define ELF_RELOCS_APPLY(__pie_name, __mem, __vbase)
#endif
--
2.8.0
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