Commit fff69382 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

linux-user: add pseudo /proc/cpuinfo for sparc 



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: 9a93c152
       ("linux-user: fix UNAME_MACHINE for sparc/sparc64")
Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-Id: <20190517133149.19593-2-laurent@vivier.eu>
Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
parent a4f667b6

linux-user/syscall.c

+15 −1
Original line number Diff line number Diff line
@@ -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 }

    };