mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-21 01:06:58 +00:00
9e6a062c43
This patch splits the file arch/x86/vdso.c into machine-independent and machine-dependent parts by moving the routine vdso_init() from the file vdso.c. The routine seems to be suitable for all architectures supporting the vDSO. The ARM version of the routine is moved to the source vdso-stub.c that is supposed to be the vDSO proxy stub implementation for architectures that don't provide the vDSO. The build scripts are adjusted as well to enable selection between the full-fledged and stub vDSO proxy implementations. Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com> Looks-good-to: Cyrill Gorcunov <gorcunov@openvz.org> Reviewed-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
64 lines
1 KiB
C
64 lines
1 KiB
C
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "vdso.h"
|
|
#include "log.h"
|
|
#include "util.h"
|
|
|
|
#ifdef LOG_PREFIX
|
|
# undef LOG_PREFIX
|
|
#endif
|
|
#define LOG_PREFIX "vdso: "
|
|
|
|
|
|
struct vdso_symtable vdso_sym_rt = VDSO_SYMTABLE_INIT;
|
|
u64 vdso_pfn = VDSO_BAD_PFN;
|
|
|
|
static int vdso_fill_self_symtable(struct vdso_symtable *s)
|
|
{
|
|
char buf[512];
|
|
int ret = -1;
|
|
FILE *maps;
|
|
|
|
VDSO_INIT_SYMTABLE(s);
|
|
|
|
maps = fopen("/proc/self/maps", "r");
|
|
if (!maps) {
|
|
pr_perror("Can't open self-vma");
|
|
return -1;
|
|
}
|
|
|
|
while (fgets(buf, sizeof(buf), maps)) {
|
|
unsigned long start, end;
|
|
|
|
if (strstr(buf, "[vdso]") == NULL)
|
|
continue;
|
|
|
|
ret = sscanf(buf, "%lx-%lx", &start, &end);
|
|
if (ret != 2) {
|
|
ret = -1;
|
|
pr_err("Can't find vDSO bounds\n");
|
|
break;
|
|
}
|
|
|
|
s->vma_start = start;
|
|
s->vma_end = end;
|
|
|
|
ret = vdso_fill_symtable((void *)start, end - start, s);
|
|
break;
|
|
}
|
|
|
|
fclose(maps);
|
|
return ret;
|
|
}
|
|
|
|
int vdso_init(void)
|
|
{
|
|
if (vdso_fill_self_symtable(&vdso_sym_rt))
|
|
return -1;
|
|
|
|
return vaddr_to_pfn(vdso_sym_rt.vma_start, &vdso_pfn);
|
|
}
|
|
|