diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2020-02-12 19:22:22 -0800 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2020-03-26 08:08:54 +0100 |
| commit | bf02adcd888f2837f6accc235a3acf69ca2e82f8 (patch) | |
| tree | fe0653450e0ff0ae4ba7929c7efefef5dd62e84b /linux-user/syscall.c | |
| parent | b26491b4d4f829fa4326d1ec2eea165a37bc6b3c (diff) | |
linux-user: Add x86_64 vsyscall page to /proc/self/maps
The page isn't (necessarily) present in the host /proc/self/maps,
and even if it might be it isn't present in page_flags, and even
if it was it might not have the same set of page permissions.
The easiest thing to do, particularly when it comes to the
"[vsyscall]" note at the end of line, is to special case it.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200213032223.14643-5-richard.henderson@linaro.org>
[lv: remove trailing space]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 35f4146662..dbdd56e420 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -7144,6 +7144,16 @@ static int open_self_maps(void *cpu_env, int fd) } } +#ifdef TARGET_VSYSCALL_PAGE + /* + * We only support execution from the vsyscall page. + * This is as if CONFIG_LEGACY_VSYSCALL_XONLY=y from v5.3. + */ + dprintf(fd, TARGET_FMT_lx "-" TARGET_FMT_lx + " --xp 00000000 00:00 0 [vsyscall]\n", + TARGET_VSYSCALL_PAGE, TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE); +#endif + free(line); fclose(fp); |