[Qemu-devel] [PULL] [PATCH 00/19] linux-user update

[Qemu-devel] [PULL] [PATCH 00/19] linux-user update

[riku.voipio]

From: Riku Voipio <riku.voipio@linaro.org>

The following changes since commit d34e8f6e9d3a396c3327aa9807c83f9e1f4a7bd7:

  main-loop: For tools, initialize timers as part of qemu_init_main_loop() (2012-02-01 14:45:02 -0600)

are available in the git repository at:
  git://git.linaro.org/people/rikuvoipio/qemu.git linux-user-for-upstream

Akos PASZTORY (1):
  linux-user: add SO_PEERCRED support for getsockopt

Alexander Graf (7):
  linux-user: save auxv length
  linux-user: add open() hijack infrastructure
  linux-user: fake /proc/self/maps
  linux-user: fake /proc/self/stat
  linux-user: fake /proc/self/auxv
  linux-user: fix QEMU_STRACE=1 segfault
  linux-user: fix wait* syscall status returns

Andreas Färber (5):
  linux-user: Add default-configs for mipsn32[el]
  linux-user: Add default configs for mips64[el]
  linux-user: Define TARGET_QEMU_ESIGRETURN for mipsn32
  linux-user: Define TARGET_QEMU_ESIGRETURN for mips64
  linux-user: Fix sa_flags byte swaps for mips

Peter Maydell (4):
  linux-user/strace.c: Correct errno printing for mmap etc
  linux-user: Allow NULL value pointer in setxattr and getxattr
  linux-user/syscall.c: Implement f and l versions of
    set/get/removexattr
  linux-user: Implement *listxattr syscalls

Riku Voipio (1):
  linux-user: stack_base is now mandatory on all targets

陳韋任 (1):
  linux-user/main.c: Add option to user-mode emulation so that user can
    specify log file name

 default-configs/mips64-linux-user.mak    |    1 +
 default-configs/mips64el-linux-user.mak  |    1 +
 default-configs/mipsn32-linux-user.mak   |    1 +
 default-configs/mipsn32el-linux-user.mak |    1 +
 linux-user/elfload.c                     |   15 +-
 linux-user/main.c                        |    7 +
 linux-user/mips64/syscall.h              |    3 +
 linux-user/mipsn32/syscall.h             |    3 +
 linux-user/qemu.h                        |    3 +-
 linux-user/signal.c                      |    8 +
 linux-user/strace.c                      |   19 ++-
 linux-user/syscall.c                     |  303 +++++++++++++++++++++++++++---
 linux-user/syscall_defs.h                |    6 +
 13 files changed, 332 insertions(+), 39 deletions(-)
 create mode 100644 default-configs/mips64-linux-user.mak
 create mode 100644 default-configs/mips64el-linux-user.mak
 create mode 100644 default-configs/mipsn32-linux-user.mak
 create mode 100644 default-configs/mipsn32el-linux-user.mak

-- 
1.7.5.4

[Qemu-devel] [PATCH 01/19] linux-user: stack_base is now mandatory on all targets

[riku.voipio]

From: Riku Voipio <riku.voipio@linaro.org>

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/qemu.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 55ad9d8..30e2abd 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -123,10 +123,10 @@ typedef struct TaskState {
 #endif
 #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
     /* Extra fields for semihosted binaries.  */
-    uint32_t stack_base;
     uint32_t heap_base;
     uint32_t heap_limit;
 #endif
+    uint32_t stack_base;
     int used; /* non zero if used */
     struct image_info *info;
     struct linux_binprm *bprm;
-- 
1.7.5.4

Re: [Qemu-devel] [PATCH 01/19] linux-user: stack_base is now mandatory on all targets

[Laurent Desnogues]

On Fri, Feb 3, 2012 at 3:49 PM,  <riku.voipio@linaro.org> wrote:
> From: Riku Voipio <riku.voipio@linaro.org>
>
> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
> ---
>  linux-user/qemu.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/linux-user/qemu.h b/linux-user/qemu.h
> index 55ad9d8..30e2abd 100644
> --- a/linux-user/qemu.h
> +++ b/linux-user/qemu.h
> @@ -123,10 +123,10 @@ typedef struct TaskState {
>  #endif
>  #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
>     /* Extra fields for semihosted binaries.  */
> -    uint32_t stack_base;
>     uint32_t heap_base;
>     uint32_t heap_limit;
>  #endif
> +    uint32_t stack_base;

Shouldn't this be abi_ulong instead of uint32_t?

>     int used; /* non zero if used */
>     struct image_info *info;
>     struct linux_binprm *bprm;

Laurent

Re: [Qemu-devel] [PATCH 01/19] linux-user: stack_base is now mandatory on all targets

[Laurent Desnogues]

On Wed, Feb 8, 2012 at 10:46 AM, Laurent Desnogues
<laurent.desnogues@gmail.com> wrote:
> On Fri, Feb 3, 2012 at 3:49 PM,  <riku.voipio@linaro.org> wrote:
>> From: Riku Voipio <riku.voipio@linaro.org>
>>
>> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
>> ---
>>  linux-user/qemu.h |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/linux-user/qemu.h b/linux-user/qemu.h
>> index 55ad9d8..30e2abd 100644
>> --- a/linux-user/qemu.h
>> +++ b/linux-user/qemu.h
>> @@ -123,10 +123,10 @@ typedef struct TaskState {
>>  #endif
>>  #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
>>     /* Extra fields for semihosted binaries.  */
>> -    uint32_t stack_base;
>>     uint32_t heap_base;
>>     uint32_t heap_limit;
>>  #endif
>> +    uint32_t stack_base;
>
> Shouldn't this be abi_ulong instead of uint32_t?

Ping...

Yes it's more than a year old, but if Aarch64 support with semihosting
ever comes to life :)

Laurent

>>     int used; /* non zero if used */
>>     struct image_info *info;
>>     struct linux_binprm *bprm;
>
> Laurent

Re: [Qemu-devel] [PATCH 01/19] linux-user: stack_base is now mandatory on all targets

[Riku Voipio]

>>>  #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
>>>     /* Extra fields for semihosted binaries.  */
>>> -    uint32_t stack_base;
>>>     uint32_t heap_base;
>>>     uint32_t heap_limit;
>>>  #endif
>>> +    uint32_t stack_base;

>> Shouldn't this be abi_ulong instead of uint32_t?

> Ping...

> Yes it's more than a year old, but if Aarch64 support with semihosting
> ever comes to life :)

You are right, but we need to change the other variables as well, and
the tswap32 code in semihosting code while at it? I think the change
is probable better done in the patches that actually add aarch64
semihosting support to qemu.

Riku

[Qemu-devel] [PATCH 02/19] linux-user: save auxv length

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

We create our own AUXV segment on stack and save a pointer to it.
However we don't save the length of it, so any code that wants to
do anything useful with it later on has to walk it again.

Instead, let's remember the length of our AUXV segment. This
simplifies later uses by a lot.

(edited by Riku to apply to qemu HEAD)

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
---
 linux-user/elfload.c |   15 ++++-----------
 linux-user/qemu.h    |    1 +
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 845be8b..2fd4a93 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -1245,6 +1245,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
                                    struct image_info *interp_info)
 {
     abi_ulong sp;
+    abi_ulong sp_auxv;
     int size;
     int i;
     abi_ulong u_rand_bytes;
@@ -1316,6 +1317,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
         sp -= n; put_user_ual(id, sp);          \
     } while(0)
 
+    sp_auxv = sp;
     NEW_AUX_ENT (AT_NULL, 0);
 
     /* There must be exactly DLINFO_ITEMS entries here.  */
@@ -1346,6 +1348,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
 #undef NEW_AUX_ENT
 
     info->saved_auxv = sp;
+    info->auxv_len = sp_auxv - sp;
 
     sp = loader_build_argptr(envc, argc, sp, p, 0);
     return sp;
@@ -2326,9 +2329,8 @@ static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
 {
     elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
     elf_addr_t orig_auxv = auxv;
-    abi_ulong val;
     void *ptr;
-    int i, len;
+    int len = ts->info->auxv_len;
 
     /*
      * Auxiliary vector is stored in target process stack.  It contains
@@ -2336,15 +2338,6 @@ static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
      * strictly necessary but we do it here for sake of completeness.
      */
 
-    /* find out length of the vector, AT_NULL is terminator */
-    i = len = 0;
-    do {
-        get_user_ual(val, auxv);
-        i += 2;
-        auxv += 2 * sizeof (elf_addr_t);
-    } while (val != AT_NULL);
-    len = i * sizeof (elf_addr_t);
-
     /* read in whole auxv vector and copy it to memelfnote */
     ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
     if (ptr != NULL) {
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 30e2abd..308dbc0 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -48,6 +48,7 @@ struct image_info {
         abi_ulong       code_offset;
         abi_ulong       data_offset;
         abi_ulong       saved_auxv;
+        abi_ulong       auxv_len;
         abi_ulong       arg_start;
         abi_ulong       arg_end;
 	int		personality;
-- 
1.7.5.4

[Qemu-devel] [PATCH 03/19] linux-user: add open() hijack infrastructure

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

There are a number of files in /proc that expose host information
to the guest program. This patch adds infrastructure to override
the open() syscall for guest programs to enable us to on the fly
generate guest sensible files.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   52 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 2bf9e7e..e100025 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4600,6 +4600,52 @@ int get_osversion(void)
     return osversion;
 }
 
+static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
+{
+    struct fake_open {
+        const char *filename;
+        int (*fill)(void *cpu_env, int fd);
+    };
+    const struct fake_open *fake_open;
+    static const struct fake_open fakes[] = {
+        { NULL, NULL }
+    };
+
+    for (fake_open = fakes; fake_open->filename; fake_open++) {
+        if (!strncmp(pathname, fake_open->filename,
+                     strlen(fake_open->filename))) {
+            break;
+        }
+    }
+
+    if (fake_open->filename) {
+        const char *tmpdir;
+        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);
+        if (fd < 0) {
+            return fd;
+        }
+        unlink(filename);
+
+        if ((r = fake_open->fill(cpu_env, fd))) {
+            close(fd);
+            return r;
+        }
+        lseek(fd, 0, SEEK_SET);
+
+        return fd;
+    }
+
+    return get_errno(open(path(pathname), flags, mode));
+}
+
 /* do_syscall() should always have a single exit point at the end so
    that actions, such as logging of syscall results, can be performed.
    All errnos that do_syscall() returns must be -TARGET_<errcode>. */
@@ -4685,9 +4731,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
     case TARGET_NR_open:
         if (!(p = lock_user_string(arg1)))
             goto efault;
-        ret = get_errno(open(path(p),
-                             target_to_host_bitmask(arg2, fcntl_flags_tbl),
-                             arg3));
+        ret = get_errno(do_open(cpu_env, p,
+                                target_to_host_bitmask(arg2, fcntl_flags_tbl),
+                                arg3));
         unlock_user(p, arg1, 0);
         break;
 #if defined(TARGET_NR_openat) && defined(__NR_openat)
-- 
1.7.5.4

[Qemu-devel] [PATCH 04/19] linux-user: fake /proc/self/maps

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

glibc's pthread_attr_getstack tries to find the stack range from
/proc/self/maps. Unfortunately, /proc is usually the host's /proc
which means linux-user guests see qemu's stack there.

Fake the file with a constructed maps entry that exposes the guest's
stack range.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e100025..1864d7f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4600,6 +4600,20 @@ int get_osversion(void)
     return osversion;
 }
 
+
+static int open_self_maps(void *cpu_env, int fd)
+{
+    TaskState *ts = ((CPUState *)cpu_env)->opaque;
+
+    dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0          [stack]\n",
+                (unsigned long long)ts->info->stack_limit,
+                (unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1))
+                                     & TARGET_PAGE_MASK,
+                (unsigned long long)ts->stack_base);
+
+    return 0;
+}
+
 static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
 {
     struct fake_open {
@@ -4608,6 +4622,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
     };
     const struct fake_open *fake_open;
     static const struct fake_open fakes[] = {
+        { "/proc/self/maps", open_self_maps },
         { NULL, NULL }
     };
 
-- 
1.7.5.4

[Qemu-devel] [PATCH 05/19] linux-user: fake /proc/self/stat

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

The boehm gc finds the program's stack starting pointer by
checking /proc/self/stat. Unfortunately, so far it reads
qemu's stack pointer which clearly is wrong.

So let's instead fake the file so the guest program sees the
right address.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 1864d7f..5a5fdac 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4614,6 +4614,31 @@ static int open_self_maps(void *cpu_env, int fd)
     return 0;
 }
 
+static int open_self_stat(void *cpu_env, int fd)
+{
+    TaskState *ts = ((CPUState *)cpu_env)->opaque;
+    abi_ulong start_stack = ts->info->start_stack;
+    int i;
+
+    for (i = 0; i < 44; i++) {
+      char buf[128];
+      int len;
+      uint64_t val = 0;
+
+      if (i == 27) {
+          /* stack bottom */
+          val = start_stack;
+      }
+      snprintf(buf, sizeof(buf), "%"PRId64 "%c", val, i == 43 ? '\n' : ' ');
+      len = strlen(buf);
+      if (write(fd, buf, len) != len) {
+          return -1;
+      }
+    }
+
+    return 0;
+}
+
 static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
 {
     struct fake_open {
@@ -4623,6 +4648,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
     const struct fake_open *fake_open;
     static const struct fake_open fakes[] = {
         { "/proc/self/maps", open_self_maps },
+        { "/proc/self/stat", open_self_stat },
         { NULL, NULL }
     };
 
-- 
1.7.5.4

[Qemu-devel] [PATCH 06/19] linux-user: fake /proc/self/auxv

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

Gtk tries to read /proc/self/auxv to find its auxv table instead of
taking it from its own program memory space.

However, when running with linux-user, we see the host's auxv which
clearly exposes wrong information. so let's instead expose the guest
memory backed auxv tables via /proc/self/auxv as well.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5a5fdac..c6bfcd8 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4639,6 +4639,35 @@ static int open_self_stat(void *cpu_env, int fd)
     return 0;
 }
 
+static int open_self_auxv(void *cpu_env, int fd)
+{
+    TaskState *ts = ((CPUState *)cpu_env)->opaque;
+    abi_ulong auxv = ts->info->saved_auxv;
+    abi_ulong len = ts->info->auxv_len;
+    char *ptr;
+
+    /*
+     * Auxiliary vector is stored in target process stack.
+     * read in whole auxv vector and copy it to file
+     */
+    ptr = lock_user(VERIFY_READ, auxv, len, 0);
+    if (ptr != NULL) {
+        while (len > 0) {
+            ssize_t r;
+            r = write(fd, ptr, len);
+            if (r <= 0) {
+                break;
+            }
+            len -= r;
+            ptr += r;
+        }
+        lseek(fd, 0, SEEK_SET);
+        unlock_user(ptr, auxv, len);
+    }
+
+    return 0;
+}
+
 static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
 {
     struct fake_open {
@@ -4649,6 +4678,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
     static const struct fake_open fakes[] = {
         { "/proc/self/maps", open_self_maps },
         { "/proc/self/stat", open_self_stat },
+        { "/proc/self/auxv", open_self_auxv },
         { NULL, NULL }
     };
 
-- 
1.7.5.4

[Qemu-devel] [PATCH 07/19] linux-user/main.c: Add option to user-mode emulation so that user can specify log file name

[riku.voipio]

From: 陳韋任 <chenwj@iis.sinica.edu.tw>

  QEMU linux user-mode's default log file name is "/tmp/qemu.log". In order to
change the log file name, user need to modify the source code then recompile
QEMU. This patch allow user use "-D logfile" option to specify the log file
name.

Signed-off-by: Chen Wen-Ren <chenwj@iis.sinica.edu.tw>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/main.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/linux-user/main.c b/linux-user/main.c
index 64d2208..14bf5f0 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2945,6 +2945,11 @@ static void handle_arg_log(const char *arg)
     cpu_set_log(mask);
 }
 
+static void handle_arg_log_filename(const char *arg)
+{
+    cpu_set_log_filename(arg);
+}
+
 static void handle_arg_set_env(const char *arg)
 {
     char *r, *p, *token;
@@ -3125,6 +3130,8 @@ struct qemu_argument arg_table[] = {
 #endif
     {"d",          "QEMU_LOG",         true,  handle_arg_log,
      "options",    "activate log"},
+    {"D",          "QEMU_LOG_FILENAME", true, handle_arg_log_filename,
+     "logfile",     "override default logfile location"},
     {"p",          "QEMU_PAGESIZE",    true,  handle_arg_pagesize,
      "pagesize",   "set the host page size to 'pagesize'"},
     {"singlestep", "QEMU_SINGLESTEP",  false, handle_arg_singlestep,
-- 
1.7.5.4

[Qemu-devel] [PATCH 08/19] linux-user: add SO_PEERCRED support for getsockopt

[riku.voipio]

From: Akos PASZTORY <akos.pasztory@gmail.com>

Signed-off-by: Akos PASZTORY <akos.pasztory@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c      |   34 +++++++++++++++++++++++++++++++++-
 linux-user/syscall_defs.h |    6 ++++++
 2 files changed, 39 insertions(+), 1 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index c6bfcd8..15b8b22 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1530,9 +1530,41 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
         case TARGET_SO_LINGER:
         case TARGET_SO_RCVTIMEO:
         case TARGET_SO_SNDTIMEO:
-        case TARGET_SO_PEERCRED:
         case TARGET_SO_PEERNAME:
             goto unimplemented;
+        case TARGET_SO_PEERCRED: {
+            struct ucred cr;
+            socklen_t crlen;
+            struct target_ucred *tcr;
+
+            if (get_user_u32(len, optlen)) {
+                return -TARGET_EFAULT;
+            }
+            if (len < 0) {
+                return -TARGET_EINVAL;
+            }
+
+            crlen = sizeof(cr);
+            ret = get_errno(getsockopt(sockfd, level, SO_PEERCRED,
+                                       &cr, &crlen));
+            if (ret < 0) {
+                return ret;
+            }
+            if (len > crlen) {
+                len = crlen;
+            }
+            if (!lock_user_struct(VERIFY_WRITE, tcr, optval_addr, 0)) {
+                return -TARGET_EFAULT;
+            }
+            __put_user(cr.pid, &tcr->pid);
+            __put_user(cr.uid, &tcr->uid);
+            __put_user(cr.gid, &tcr->gid);
+            unlock_user_struct(tcr, optval_addr, 1);
+            if (put_user_u32(len, optlen)) {
+                return -TARGET_EFAULT;
+            }
+            break;
+        }
         /* Options with 'int' argument.  */
         case TARGET_SO_DEBUG:
             optname = SO_DEBUG;
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 2857805..41f0ff8 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2336,3 +2336,9 @@ struct target_rlimit64 {
     uint64_t rlim_cur;
     uint64_t rlim_max;
 };
+
+struct target_ucred {
+    uint32_t pid;
+    uint32_t uid;
+    uint32_t gid;
+};
-- 
1.7.5.4

[Qemu-devel] [PATCH 09/19] linux-user: fix QEMU_STRACE=1 segfault

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

While debugging some issues with QEMU_STRACE I stumbled over segmentation
faults that were pretty reproducible. Turns out we tried to treat a
normal return value as errno, resulting in an access over array boundaries
for the resolution.

Fix this by allowing failure to resolve invalid errnos into strings.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/strace.c  |   18 ++++++++++++++----
 linux-user/syscall.c |    3 +++
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/linux-user/strace.c b/linux-user/strace.c
index 90027a1..269481e 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -284,8 +284,13 @@ print_ipc(const struct syscallname *name,
 static void
 print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
 {
-if( ret == -1 ) {
-        gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno));
+    char *errstr = NULL;
+
+    if (ret == -1) {
+        errstr = target_strerror(errno);
+    }
+    if ((ret == -1) && errstr) {
+        gemu_log(" = -1 errno=%d (%s)\n", errno, errstr);
     } else {
         gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
     }
@@ -1515,14 +1520,19 @@ void
 print_syscall_ret(int num, abi_long ret)
 {
     int i;
+    char *errstr = NULL;
 
     for(i=0;i<nsyscalls;i++)
         if( scnames[i].nr == num ) {
             if( scnames[i].result != NULL ) {
                 scnames[i].result(&scnames[i],ret);
             } else {
-                if( ret < 0 ) {
-                    gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret));
+                if (ret < 0) {
+                    errstr = target_strerror(-ret);
+                }
+                if (errstr) {
+                    gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n",
+                             -ret, errstr);
                 } else {
                     gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
                 }
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 15b8b22..29d92c4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -731,6 +731,9 @@ static inline int is_error(abi_long ret)
 
 char *target_strerror(int err)
 {
+    if ((err >= ERRNO_TABLE_SIZE) || (err < 0)) {
+        return NULL;
+    }
     return strerror(target_to_host_errno(err));
 }
 
-- 
1.7.5.4

[Qemu-devel] [PATCH 10/19] linux-user/strace.c: Correct errno printing for mmap etc

[riku.voipio]

From: Peter Maydell <peter.maydell@linaro.org>

Correct the printing of errnos for syscalls which are handled
via print_syscall_ret_addr (mmap, mmap2, brk, shmat): errnos
are returned as negative returned values at this level, not
via the host 'errno' variable.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/strace.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/linux-user/strace.c b/linux-user/strace.c
index 269481e..05a0d3e 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -1,5 +1,4 @@
 #include <stdio.h>
-#include <errno.h>
 #include <sys/ipc.h>
 #include <sys/msg.h>
 #include <sys/sem.h>
@@ -286,11 +285,11 @@ print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
 {
     char *errstr = NULL;
 
-    if (ret == -1) {
-        errstr = target_strerror(errno);
+    if (ret < 0) {
+        errstr = target_strerror(-ret);
     }
-    if ((ret == -1) && errstr) {
-        gemu_log(" = -1 errno=%d (%s)\n", errno, errstr);
+    if (errstr) {
+        gemu_log(" = -1 errno=%d (%s)\n", (int)-ret, errstr);
     } else {
         gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
     }
-- 
1.7.5.4

[Qemu-devel] [PATCH 11/19] linux-user: fix wait* syscall status returns

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

When calling wait4 or waitpid with a status pointer and WNOHANG, the
syscall can potentially not modify the status pointer input. Now if we
have guest code like:

  int status = 0;
  waitpid(pid, &status, WNOHANG);
  if (status)
     <breakage>

then we have to make sure that in case status did not change we actually
return the guest's initialized status variable instead of our own uninitialized.
We fail to do so today, as we proxy everything through an uninitialized status
variable which for me ended up always containing the last error code.

This patch fixes some test cases when building yast2-core in OBS for ARM.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 29d92c4..06b19e0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4867,7 +4867,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         {
             int status;
             ret = get_errno(waitpid(arg1, &status, arg3));
-            if (!is_error(ret) && arg2
+            if (!is_error(ret) && arg2 && ret
                 && put_user_s32(host_to_target_waitstatus(status), arg2))
                 goto efault;
         }
@@ -6423,7 +6423,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                 rusage_ptr = NULL;
             ret = get_errno(wait4(arg1, &status, arg3, rusage_ptr));
             if (!is_error(ret)) {
-                if (status_ptr) {
+                if (status_ptr && ret) {
                     status = host_to_target_waitstatus(status);
                     if (put_user_s32(status, status_ptr))
                         goto efault;
-- 
1.7.5.4

[Qemu-devel] [PATCH 12/19] linux-user: Allow NULL value pointer in setxattr and getxattr

[riku.voipio]

From: Peter Maydell <peter.maydell@linaro.org>

It's valid to pass a NULL value pointer to setxattr, so don't
fail this case EFAULT.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   24 ++++++++++++++++++------
 1 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 06b19e0..0a78a18 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7809,11 +7809,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         break;
     case TARGET_NR_setxattr:
         {
-            void *p, *n, *v;
+            void *p, *n, *v = 0;
+            if (arg3) {
+                v = lock_user(VERIFY_READ, arg3, arg4, 1);
+                if (!v) {
+                    ret = -TARGET_EFAULT;
+                    break;
+                }
+            }
             p = lock_user_string(arg1);
             n = lock_user_string(arg2);
-            v = lock_user(VERIFY_READ, arg3, arg4, 1);
-            if (p && n && v) {
+            if (p && n) {
                 ret = get_errno(setxattr(p, n, v, arg4, arg5));
             } else {
                 ret = -TARGET_EFAULT;
@@ -7825,11 +7831,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         break;
     case TARGET_NR_getxattr:
         {
-            void *p, *n, *v;
+            void *p, *n, *v = 0;
+            if (arg3) {
+                v = lock_user(VERIFY_WRITE, arg3, arg4, 0);
+                if (!v) {
+                    ret = -TARGET_EFAULT;
+                    break;
+                }
+            }
             p = lock_user_string(arg1);
             n = lock_user_string(arg2);
-            v = lock_user(VERIFY_WRITE, arg3, arg4, 0);
-            if (p && n && v) {
+            if (p && n) {
                 ret = get_errno(getxattr(p, n, v, arg4));
             } else {
                 ret = -TARGET_EFAULT;
-- 
1.7.5.4

[Qemu-devel] [PATCH 13/19] linux-user/syscall.c: Implement f and l versions of set/get/removexattr

[riku.voipio]

From: Peter Maydell <peter.maydell@linaro.org>

Implement the f and l versions (operate on fd, don't follow links)
of the setxattr, getxattr and removexattr syscalls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   79 ++++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 70 insertions(+), 9 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0a78a18..762115b 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7796,18 +7796,13 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #endif
 #ifdef CONFIG_ATTR
 #ifdef TARGET_NR_setxattr
-    case TARGET_NR_lsetxattr:
-    case TARGET_NR_fsetxattr:
-    case TARGET_NR_lgetxattr:
-    case TARGET_NR_fgetxattr:
     case TARGET_NR_listxattr:
     case TARGET_NR_llistxattr:
     case TARGET_NR_flistxattr:
-    case TARGET_NR_lremovexattr:
-    case TARGET_NR_fremovexattr:
         ret = -TARGET_EOPNOTSUPP;
         break;
     case TARGET_NR_setxattr:
+    case TARGET_NR_lsetxattr:
         {
             void *p, *n, *v = 0;
             if (arg3) {
@@ -7820,7 +7815,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             p = lock_user_string(arg1);
             n = lock_user_string(arg2);
             if (p && n) {
-                ret = get_errno(setxattr(p, n, v, arg4, arg5));
+                if (num == TARGET_NR_setxattr) {
+                    ret = get_errno(setxattr(p, n, v, arg4, arg5));
+                } else {
+                    ret = get_errno(lsetxattr(p, n, v, arg4, arg5));
+                }
             } else {
                 ret = -TARGET_EFAULT;
             }
@@ -7829,7 +7828,28 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             unlock_user(v, arg3, 0);
         }
         break;
+    case TARGET_NR_fsetxattr:
+        {
+            void *n, *v = 0;
+            if (arg3) {
+                v = lock_user(VERIFY_READ, arg3, arg4, 1);
+                if (!v) {
+                    ret = -TARGET_EFAULT;
+                    break;
+                }
+            }
+            n = lock_user_string(arg2);
+            if (n) {
+                ret = get_errno(fsetxattr(arg1, n, v, arg4, arg5));
+            } else {
+                ret = -TARGET_EFAULT;
+            }
+            unlock_user(n, arg2, 0);
+            unlock_user(v, arg3, 0);
+        }
+        break;
     case TARGET_NR_getxattr:
+    case TARGET_NR_lgetxattr:
         {
             void *p, *n, *v = 0;
             if (arg3) {
@@ -7842,7 +7862,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             p = lock_user_string(arg1);
             n = lock_user_string(arg2);
             if (p && n) {
-                ret = get_errno(getxattr(p, n, v, arg4));
+                if (num == TARGET_NR_getxattr) {
+                    ret = get_errno(getxattr(p, n, v, arg4));
+                } else {
+                    ret = get_errno(lgetxattr(p, n, v, arg4));
+                }
             } else {
                 ret = -TARGET_EFAULT;
             }
@@ -7851,13 +7875,38 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             unlock_user(v, arg3, arg4);
         }
         break;
+    case TARGET_NR_fgetxattr:
+        {
+            void *n, *v = 0;
+            if (arg3) {
+                v = lock_user(VERIFY_WRITE, arg3, arg4, 0);
+                if (!v) {
+                    ret = -TARGET_EFAULT;
+                    break;
+                }
+            }
+            n = lock_user_string(arg2);
+            if (n) {
+                ret = get_errno(fgetxattr(arg1, n, v, arg4));
+            } else {
+                ret = -TARGET_EFAULT;
+            }
+            unlock_user(n, arg2, 0);
+            unlock_user(v, arg3, arg4);
+        }
+        break;
     case TARGET_NR_removexattr:
+    case TARGET_NR_lremovexattr:
         {
             void *p, *n;
             p = lock_user_string(arg1);
             n = lock_user_string(arg2);
             if (p && n) {
-                ret = get_errno(removexattr(p, n));
+                if (num == TARGET_NR_removexattr) {
+                    ret = get_errno(removexattr(p, n));
+                } else {
+                    ret = get_errno(lremovexattr(p, n));
+                }
             } else {
                 ret = -TARGET_EFAULT;
             }
@@ -7865,6 +7914,18 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             unlock_user(n, arg2, 0);
         }
         break;
+    case TARGET_NR_fremovexattr:
+        {
+            void *n;
+            n = lock_user_string(arg2);
+            if (n) {
+                ret = get_errno(fremovexattr(arg1, n));
+            } else {
+                ret = -TARGET_EFAULT;
+            }
+            unlock_user(n, arg2, 0);
+        }
+        break;
 #endif
 #endif /* CONFIG_ATTR */
 #ifdef TARGET_NR_set_thread_area
-- 
1.7.5.4

[Qemu-devel] [PATCH 14/19] linux-user: Implement *listxattr syscalls

[riku.voipio]

From: Peter Maydell <peter.maydell@linaro.org>

Implement listxattr, flistxattr and llistxattr syscalls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |   36 +++++++++++++++++++++++++++++++++++-
 1 files changed, 35 insertions(+), 1 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 762115b..ee8899e 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7798,9 +7798,43 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #ifdef TARGET_NR_setxattr
     case TARGET_NR_listxattr:
     case TARGET_NR_llistxattr:
+    {
+        void *p, *b = 0;
+        if (arg2) {
+            b = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+            if (!b) {
+                ret = -TARGET_EFAULT;
+                break;
+            }
+        }
+        p = lock_user_string(arg1);
+        if (p) {
+            if (num == TARGET_NR_listxattr) {
+                ret = get_errno(listxattr(p, b, arg3));
+            } else {
+                ret = get_errno(llistxattr(p, b, arg3));
+            }
+        } else {
+            ret = -TARGET_EFAULT;
+        }
+        unlock_user(p, arg1, 0);
+        unlock_user(b, arg2, arg3);
+        break;
+    }
     case TARGET_NR_flistxattr:
-        ret = -TARGET_EOPNOTSUPP;
+    {
+        void *b = 0;
+        if (arg2) {
+            b = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+            if (!b) {
+                ret = -TARGET_EFAULT;
+                break;
+            }
+        }
+        ret = get_errno(flistxattr(arg1, b, arg3));
+        unlock_user(b, arg2, arg3);
         break;
+    }
     case TARGET_NR_setxattr:
     case TARGET_NR_lsetxattr:
         {
-- 
1.7.5.4

[Qemu-devel] [PATCH 15/19] linux-user: Add default-configs for mipsn32[el]

[riku.voipio]

From: Andreas Färber <afaerber@suse.de>

Prepares for mipsn32[el]-linux-user targets.

Signed-off-by: Ulricht Hecht <uli@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 default-configs/mipsn32-linux-user.mak   |    1 +
 default-configs/mipsn32el-linux-user.mak |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
 create mode 100644 default-configs/mipsn32-linux-user.mak
 create mode 100644 default-configs/mipsn32el-linux-user.mak

diff --git a/default-configs/mipsn32-linux-user.mak b/default-configs/mipsn32-linux-user.mak
new file mode 100644
index 0000000..5b97919
--- /dev/null
+++ b/default-configs/mipsn32-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for mipsn32-linux-user
diff --git a/default-configs/mipsn32el-linux-user.mak b/default-configs/mipsn32el-linux-user.mak
new file mode 100644
index 0000000..d6367ff
--- /dev/null
+++ b/default-configs/mipsn32el-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for mipsn32el-linux-user
-- 
1.7.5.4

[Qemu-devel] [PATCH 16/19] linux-user: Add default configs for mips64[el]

[riku.voipio]

From: Andreas Färber <afaerber@suse.de>

Prepares for mips64[el]-linux-user targets.

Signed-off-by: Khansa Butt <khansa@kics.edu.pk>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 default-configs/mips64-linux-user.mak   |    1 +
 default-configs/mips64el-linux-user.mak |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
 create mode 100644 default-configs/mips64-linux-user.mak
 create mode 100644 default-configs/mips64el-linux-user.mak

diff --git a/default-configs/mips64-linux-user.mak b/default-configs/mips64-linux-user.mak
new file mode 100644
index 0000000..1598bfc
--- /dev/null
+++ b/default-configs/mips64-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for mips64-linux-user
diff --git a/default-configs/mips64el-linux-user.mak b/default-configs/mips64el-linux-user.mak
new file mode 100644
index 0000000..629f084
--- /dev/null
+++ b/default-configs/mips64el-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for mips64el-linux-user
-- 
1.7.5.4

[Qemu-devel] [PATCH 17/19] linux-user: Define TARGET_QEMU_ESIGRETURN for mipsn32

[riku.voipio]

From: Andreas Färber <afaerber@suse.de>

Copied from mips/syscall.h.

Signed-off-by: Ulrich Hecht <uli@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/mipsn32/syscall.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/linux-user/mipsn32/syscall.h b/linux-user/mipsn32/syscall.h
index 4ec506c..ebe98f2 100644
--- a/linux-user/mipsn32/syscall.h
+++ b/linux-user/mipsn32/syscall.h
@@ -218,4 +218,7 @@ struct target_pt_regs {
 
 
 
+/* Nasty hack: define a fake errno value for use by sigreturn. */
+#define TARGET_QEMU_ESIGRETURN 255
+
 #define UNAME_MACHINE "mips64"
-- 
1.7.5.4

[Qemu-devel] [PATCH 18/19] linux-user: Define TARGET_QEMU_ESIGRETURN for mips64

[riku.voipio]

From: Andreas Färber <afaerber@suse.de>

Copied from mips/syscall.h.

Signed-off-by: Khansa Butt <khansa@kics.edu.pk>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/mips64/syscall.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/linux-user/mips64/syscall.h b/linux-user/mips64/syscall.h
index 668a2b9..e436ea5 100644
--- a/linux-user/mips64/syscall.h
+++ b/linux-user/mips64/syscall.h
@@ -218,4 +218,7 @@ struct target_pt_regs {
 
 
 
+/* Nasty hack: define a fake errno value for use by sigreturn. */
+#define TARGET_QEMU_ESIGRETURN 255
+
 #define UNAME_MACHINE "mips64"
-- 
1.7.5.4

[Qemu-devel] [PATCH 19/19] linux-user: Fix sa_flags byte swaps for mips

[riku.voipio]

From: Andreas Färber <afaerber@suse.de>

sa_flags is uint32_t for mips{,n32,64}, so don't use tswapal().

edited by Riku Voipio: likewise on alpha

Reported-by: Khansa Butt <khansa@kics.edu.pk>
Suggested-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Ehsan Ul Haq <ehsan.ulhaq@kics.edu.pk>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/signal.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index ded12ca..79a39dc 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -587,7 +587,11 @@ int do_sigaction(int sig, const struct target_sigaction *act,
 #endif
     if (oact) {
         oact->_sa_handler = tswapal(k->_sa_handler);
+#if defined(TARGET_MIPS) || defined (TARGET_ALPHA)
+        oact->sa_flags = bswap32(k->sa_flags);
+#else
         oact->sa_flags = tswapal(k->sa_flags);
+#endif
 #if !defined(TARGET_MIPS)
         oact->sa_restorer = tswapal(k->sa_restorer);
 #endif
@@ -596,7 +600,11 @@ int do_sigaction(int sig, const struct target_sigaction *act,
     if (act) {
         /* FIXME: This is not threadsafe.  */
         k->_sa_handler = tswapal(act->_sa_handler);
+#if defined(TARGET_MIPS) || defined (TARGET_ALPHA)
+        k->sa_flags = bswap32(act->sa_flags);
+#else
         k->sa_flags = tswapal(act->sa_flags);
+#endif
 #if !defined(TARGET_MIPS)
         k->sa_restorer = tswapal(act->sa_restorer);
 #endif
-- 
1.7.5.4

Re: [Qemu-devel] [PULL] [PATCH 00/19] linux-user update

[Blue Swirl]

Thanks, pulled.

On Fri, Feb 3, 2012 at 14:49,  <riku.voipio@linaro.org> wrote:
> From: Riku Voipio <riku.voipio@linaro.org>
>
> The following changes since commit d34e8f6e9d3a396c3327aa9807c83f9e1f4a7bd7:
>
>  main-loop: For tools, initialize timers as part of qemu_init_main_loop() (2012-02-01 14:45:02 -0600)
>
> are available in the git repository at:
>  git://git.linaro.org/people/rikuvoipio/qemu.git linux-user-for-upstream
>
> Akos PASZTORY (1):
>  linux-user: add SO_PEERCRED support for getsockopt
>
> Alexander Graf (7):
>  linux-user: save auxv length
>  linux-user: add open() hijack infrastructure
>  linux-user: fake /proc/self/maps
>  linux-user: fake /proc/self/stat
>  linux-user: fake /proc/self/auxv
>  linux-user: fix QEMU_STRACE=1 segfault
>  linux-user: fix wait* syscall status returns
>
> Andreas Färber (5):
>  linux-user: Add default-configs for mipsn32[el]
>  linux-user: Add default configs for mips64[el]
>  linux-user: Define TARGET_QEMU_ESIGRETURN for mipsn32
>  linux-user: Define TARGET_QEMU_ESIGRETURN for mips64
>  linux-user: Fix sa_flags byte swaps for mips
>
> Peter Maydell (4):
>  linux-user/strace.c: Correct errno printing for mmap etc
>  linux-user: Allow NULL value pointer in setxattr and getxattr
>  linux-user/syscall.c: Implement f and l versions of
>    set/get/removexattr
>  linux-user: Implement *listxattr syscalls
>
> Riku Voipio (1):
>  linux-user: stack_base is now mandatory on all targets
>
> 陳韋任 (1):
>  linux-user/main.c: Add option to user-mode emulation so that user can
>    specify log file name
>
>  default-configs/mips64-linux-user.mak    |    1 +
>  default-configs/mips64el-linux-user.mak  |    1 +
>  default-configs/mipsn32-linux-user.mak   |    1 +
>  default-configs/mipsn32el-linux-user.mak |    1 +
>  linux-user/elfload.c                     |   15 +-
>  linux-user/main.c                        |    7 +
>  linux-user/mips64/syscall.h              |    3 +
>  linux-user/mipsn32/syscall.h             |    3 +
>  linux-user/qemu.h                        |    3 +-
>  linux-user/signal.c                      |    8 +
>  linux-user/strace.c                      |   19 ++-
>  linux-user/syscall.c                     |  303 +++++++++++++++++++++++++++---
>  linux-user/syscall_defs.h                |    6 +
>  13 files changed, 332 insertions(+), 39 deletions(-)
>  create mode 100644 default-configs/mips64-linux-user.mak
>  create mode 100644 default-configs/mips64el-linux-user.mak
>  create mode 100644 default-configs/mipsn32-linux-user.mak
>  create mode 100644 default-configs/mipsn32el-linux-user.mak
>
> --
> 1.7.5.4
>
>

[Qemu-devel] [PATCH 00/19] Pending linux-user patches

[riku.voipio]

From: Riku Voipio <riku.voipio@linaro.org>

The collection of simpler linux-user patches submitted since release of 1.0.
To be sent as pull request later this week unless bugs found.

Patches are also available in the git repository at:
  git://git.linaro.org/people/rikuvoipio/qemu.git linux-user-for-upstream

Akos PASZTORY (1):
  linux-user: add SO_PEERCRED support for getsockopt

Alexander Graf (7):
  linux-user: save auxv length
  linux-user: add open() hijack infrastructure
  linux-user: fake /proc/self/maps
  linux-user: fake /proc/self/stat
  linux-user: fake /proc/self/auxv
  linux-user: fix QEMU_STRACE=1 segfault
  linux-user: fix wait* syscall status returns

Andreas Färber (5):
  linux-user: Add default-configs for mipsn32[el]
  linux-user: Add default configs for mips64[el]
  linux-user: Define TARGET_QEMU_ESIGRETURN for mipsn32
  linux-user: Define TARGET_QEMU_ESIGRETURN for mips64
  linux-user: Fix sa_flags byte swaps for mips

Peter Maydell (4):
  linux-user/strace.c: Correct errno printing for mmap etc
  linux-user: Allow NULL value pointer in setxattr and getxattr
  linux-user/syscall.c: Implement f and l versions of
    set/get/removexattr
  linux-user: Implement *listxattr syscalls

Riku Voipio (1):
  linux-user: stack_base is now mandatory on all targets

陳韋任 (1):
  linux-user/main.c: Add option to user-mode emulation so that user can
    specify log file name

 default-configs/mips64-linux-user.mak    |    1 +
 default-configs/mips64el-linux-user.mak  |    1 +
 default-configs/mipsn32-linux-user.mak   |    1 +
 default-configs/mipsn32el-linux-user.mak |    1 +
 linux-user/elfload.c                     |   15 +-
 linux-user/main.c                        |    7 +
 linux-user/mips64/syscall.h              |    3 +
 linux-user/mipsn32/syscall.h             |    3 +
 linux-user/qemu.h                        |    3 +-
 linux-user/signal.c                      |    8 +
 linux-user/strace.c                      |   19 ++-
 linux-user/syscall.c                     |  303 +++++++++++++++++++++++++++---
 linux-user/syscall_defs.h                |    6 +
 13 files changed, 332 insertions(+), 39 deletions(-)
 create mode 100644 default-configs/mips64-linux-user.mak
 create mode 100644 default-configs/mips64el-linux-user.mak
 create mode 100644 default-configs/mipsn32-linux-user.mak
 create mode 100644 default-configs/mipsn32el-linux-user.mak

-- 
1.7.5.4

[Qemu-devel] [PATCH 02/19] linux-user: save auxv length

[riku.voipio]

From: Alexander Graf <agraf@suse.de>

We create our own AUXV segment on stack and save a pointer to it.
However we don't save the length of it, so any code that wants to
do anything useful with it later on has to walk it again.

Instead, let's remember the length of our AUXV segment. This
simplifies later uses by a lot.

(edited by Riku to apply to qemu HEAD)

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
---
 linux-user/elfload.c |   15 ++++-----------
 linux-user/qemu.h    |    1 +
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 845be8b..2fd4a93 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -1245,6 +1245,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
                                    struct image_info *interp_info)
 {
     abi_ulong sp;
+    abi_ulong sp_auxv;
     int size;
     int i;
     abi_ulong u_rand_bytes;
@@ -1316,6 +1317,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
         sp -= n; put_user_ual(id, sp);          \
     } while(0)
 
+    sp_auxv = sp;
     NEW_AUX_ENT (AT_NULL, 0);
 
     /* There must be exactly DLINFO_ITEMS entries here.  */
@@ -1346,6 +1348,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
 #undef NEW_AUX_ENT
 
     info->saved_auxv = sp;
+    info->auxv_len = sp_auxv - sp;
 
     sp = loader_build_argptr(envc, argc, sp, p, 0);
     return sp;
@@ -2326,9 +2329,8 @@ static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
 {
     elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
     elf_addr_t orig_auxv = auxv;
-    abi_ulong val;
     void *ptr;
-    int i, len;
+    int len = ts->info->auxv_len;
 
     /*
      * Auxiliary vector is stored in target process stack.  It contains
@@ -2336,15 +2338,6 @@ static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
      * strictly necessary but we do it here for sake of completeness.
      */
 
-    /* find out length of the vector, AT_NULL is terminator */
-    i = len = 0;
-    do {
-        get_user_ual(val, auxv);
-        i += 2;
-        auxv += 2 * sizeof (elf_addr_t);
-    } while (val != AT_NULL);
-    len = i * sizeof (elf_addr_t);
-
     /* read in whole auxv vector and copy it to memelfnote */
     ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
     if (ptr != NULL) {
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 30e2abd..308dbc0 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -48,6 +48,7 @@ struct image_info {
         abi_ulong       code_offset;
         abi_ulong       data_offset;
         abi_ulong       saved_auxv;
+        abi_ulong       auxv_len;
         abi_ulong       arg_start;
         abi_ulong       arg_end;
 	int		personality;
-- 
1.7.5.4