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[PULL v2 04/37] linux-user: Add x86_64 vsyscall page to /proc/self/maps
From: |
Laurent Vivier |
Subject: |
[PULL v2 04/37] linux-user: Add x86_64 vsyscall page to /proc/self/maps |
Date: |
Tue, 17 Mar 2020 16:50:43 +0100 |
From: Richard Henderson <address@hidden>
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 <address@hidden>
Message-Id: <address@hidden>
[lv: remove trailing whitespace]
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/syscall.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 8d27d1080752..5479d67a10be 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7079,6 +7079,16 @@ 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);
--
2.24.1
- [PULL v2 00/37] Linux user for 5.0 patches, Laurent Vivier, 2020/03/17
- [PULL v2 02/37] linux-user/i386: Split out gen_signal, Laurent Vivier, 2020/03/17
- [PULL v2 01/37] target/i386: Renumber EXCP_SYSCALL, Laurent Vivier, 2020/03/17
- [PULL v2 09/37] linux-user: Update TASK_UNMAPPED_BASE for aarch64, Laurent Vivier, 2020/03/17
- [PULL v2 06/37] linux-user: Add AT_EXECFN auxval, Laurent Vivier, 2020/03/17
- [PULL v2 05/37] linux-user: Flush out implementation of gettimeofday, Laurent Vivier, 2020/03/17
- [PULL v2 08/37] linux-user: fix socket() strace, Laurent Vivier, 2020/03/17
- [PULL v2 11/37] linux-user/syscall: Add support for clock_gettime64/clock_settime64, Laurent Vivier, 2020/03/17
- [PULL v2 04/37] linux-user: Add x86_64 vsyscall page to /proc/self/maps,
Laurent Vivier <=
- [PULL v2 07/37] linux-user: do prlimit selectively, Laurent Vivier, 2020/03/17
- [PULL v2 13/37] linux-user: introduce parameters to generate syscall_nr.h, Laurent Vivier, 2020/03/17
- [PULL v2 10/37] linux-user: Protect more syscalls, Laurent Vivier, 2020/03/17
- [PULL v2 16/37] linux-user, m68k: add syscall table generation support, Laurent Vivier, 2020/03/17
- [PULL v2 03/37] linux-user/i386: Emulate x86_64 vsyscalls, Laurent Vivier, 2020/03/17
- [PULL v2 12/37] linux-user/riscv: Update the syscall_nr's to the 5.5 kernel, Laurent Vivier, 2020/03/17
- [PULL v2 15/37] linux-user, hppa: add syscall table generation support, Laurent Vivier, 2020/03/17
- [PULL v2 14/37] linux-user, alpha: add syscall table generation support, Laurent Vivier, 2020/03/17
- [PULL v2 17/37] linux-user, xtensa: add syscall table generation support, Laurent Vivier, 2020/03/17