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[v2,1/2] linux-user: add pseudo /proc/cpuinfofor sparc

Message ID 20190517133149.19593-2-laurent@vivier.eu
State New
Headers show
Series Add pseudo /proc/hardware and/proc/cpuinfo | expand

Commit Message

Laurent Vivier May 17, 2019, 1:31 p.m. UTC 
SPARC libc6 debian package wants to check the cpu level to be
installed or not:

  WARNING: This machine has a SPARC V8 or earlier class processor.
  Debian lenny and later does not support such old hardware
  any longer.

To avoid this, it only needs to know if the machine type is sun4u or sun4v,
for that it reads the information from /proc/cpuinfo.

Fixes: 9a93c152fcdb4ab2cd85094487b33578fd693915
       ("linux-user: fix UNAME_MACHINE for sparc/sparc64")
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/syscall.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

Comments

Richard Henderson May 20, 2019, 3:03 a.m. UTC | #1 
On 5/17/19 6:31 AM, Laurent Vivier wrote:
> SPARC libc6 debian package wants to check the cpu level to be
> installed or not:
> 
>   WARNING: This machine has a SPARC V8 or earlier class processor.
>   Debian lenny and later does not support such old hardware
>   any longer.
> 
> To avoid this, it only needs to know if the machine type is sun4u or sun4v,
> for that it reads the information from /proc/cpuinfo.
> 
> Fixes: 9a93c152fcdb4ab2cd85094487b33578fd693915
>        ("linux-user: fix UNAME_MACHINE for sparc/sparc64")
> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
> ---
>  linux-user/syscall.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~
diff mbox series

Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index f5ff6f5dc8a8..43b1b106765c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6786,12 +6786,15 @@  static int is_proc_myself(const char *filename, const char *entry)
     return 0;
 }
 
-#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
+#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) || \
+    defined(TARGET_SPARC)
 static int is_proc(const char *filename, const char *entry)
 {
     return strcmp(filename, entry) == 0;
 }
+#endif
 
+#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
 static int open_net_route(void *cpu_env, int fd)
 {
     FILE *fp;
@@ -6836,6 +6839,14 @@  static int open_net_route(void *cpu_env, int fd)
 }
 #endif
 
+#if defined(TARGET_SPARC)
+static int open_cpuinfo(void *cpu_env, int fd)
+{
+    dprintf(fd, "type\t\t: sun4u\n");
+    return 0;
+}
+#endif
+
 static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags, mode_t mode)
 {
     struct fake_open {
@@ -6851,6 +6862,9 @@  static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
         { "cmdline", open_self_cmdline, is_proc_myself },
 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
         { "/proc/net/route", open_net_route, is_proc },
+#endif
+#if defined(TARGET_SPARC)
+        { "/proc/cpuinfo", open_cpuinfo, is_proc },
 #endif
         { NULL, NULL, NULL }
     };