diff options
Diffstat (limited to 'pkg/sentry/mm/proc_pid_maps.go')
| -rw-r--r-- | pkg/sentry/mm/proc_pid_maps.go | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/pkg/sentry/mm/proc_pid_maps.go b/pkg/sentry/mm/proc_pid_maps.go index 0bf1cdb51..247ee45ef 100644 --- a/pkg/sentry/mm/proc_pid_maps.go +++ b/pkg/sentry/mm/proc_pid_maps.go @@ -53,6 +53,22 @@ func (mm *MemoryManager) ReadSeqFileData(ctx context.Context, handle seqfile.Seq Handle: &vmaAddr, }) } + + // We always emulate vsyscall, so advertise it here. Everything about a + // vsyscall region is static, so just hard code the maps entry since we + // don't have a real vma backing it. The vsyscall region is at the end of + // the virtual address space so nothing should be mapped after it (if + // something is really mapped in the tiny ~10 MiB segment afterwards, we'll + // get the sorting on the maps file wrong at worst; but that's not possible + // on any current platform). + // + // Artifically adjust the seqfile handle so we only output vsyscall entry once. + if vsyscallEnd := usermem.Addr(0xffffffffff601000); start != vsyscallEnd { + data = append(data, seqfile.SeqData{ + Buf: []byte("ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n"), + Handle: &vsyscallEnd, + }) + } return data, 1 } |