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Pull request linux-user 20220803

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Merge tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu into staging

Pull request linux-user 20220803

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# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [undefined]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [undefined]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu:
  linux-user: Use memfd for open syscall emulation
  linux-user: Do not treat madvise()'s advice as a bitmask
  linux-user/flatload.c: Fix setting of image_info::end_code

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-08-03 08:32:44 -07:00
commit 2480f3bbd0
3 changed files with 16 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
linux-user/flatload.c
View File

@ -808,7 +808,7 @@ int load_flt_binary(struct linux_binprm *bprm, struct image_info *info)
/* Stash our initial stack pointer into the mm structure */
info->start_code = libinfo[0].start_code;
info->end_code = libinfo[0].start_code = libinfo[0].text_len;
info->end_code = libinfo[0].start_code + libinfo[0].text_len;
info->start_data = libinfo[0].start_data;
info->end_data = libinfo[0].end_data;
info->start_brk = libinfo[0].start_brk;

2
linux-user/mmap.c
View File

@ -891,7 +891,7 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice)
* anonymous mappings. In this case passthrough is safe, so do it.
*/
mmap_lock();
if ((advice & MADV_DONTNEED) &&
if (advice == MADV_DONTNEED &&
can_passthrough_madv_dontneed(start, end)) {
ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED));
}

22
linux-user/syscall.c
View File

@ -8260,16 +8260,22 @@ static int do_openat(CPUArchState *cpu_env, int dirfd, const char *pathname, int
char filename[PATH_MAX];
int fd, r;
/* create temporary file to map stat to */
tmpdir = getenv("TMPDIR");
if (!tmpdir)
tmpdir = "/tmp";
snprintf(filename, sizeof(filename), "%s/qemu-open.XXXXXX", tmpdir);
fd = mkstemp(filename);
fd = memfd_create("qemu-open", 0);
if (fd < 0) {
return fd;
if (errno != ENOSYS) {
return fd;
}
/* create temporary file to map stat to */
tmpdir = getenv("TMPDIR");
if (!tmpdir)
tmpdir = "/tmp";
snprintf(filename, sizeof(filename), "%s/qemu-open.XXXXXX", tmpdir);
fd = mkstemp(filename);
if (fd < 0) {
return fd;
}
unlink(filename);
}
unlink(filename);
if ((r = fake_open->fill(cpu_env, fd))) {
int e = errno;