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author | Sam bobroff <sam.bobroff@au1.ibm.com> | 2015-04-10 07:16:48 +0300 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-04-11 13:49:20 +0300 |
commit | 2b03fc1db59d53da327cf21f77e189b4d0a8aced (patch) | |
tree | c53d1f039ff14efc82895544df2b107925c51f05 /tools/testing/selftests/powerpc/harness.c | |
parent | feba40362b11341bee6d8ed58d54b896abbd9f84 (diff) | |
download | linux-2b03fc1db59d53da327cf21f77e189b4d0a8aced.tar.xz |
selftests/powerpc: Move get_auxv_entry() to harness.c
Move get_auxv_entry() from pmu/lib.c up to harness.c in order to make
it available to other tests.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/testing/selftests/powerpc/harness.c')
-rw-r--r-- | tools/testing/selftests/powerpc/harness.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/harness.c b/tools/testing/selftests/powerpc/harness.c index 8ebc58a09311..f7997affd143 100644 --- a/tools/testing/selftests/powerpc/harness.c +++ b/tools/testing/selftests/powerpc/harness.c @@ -11,6 +11,10 @@ #include <sys/types.h> #include <sys/wait.h> #include <unistd.h> +#include <elf.h> +#include <fcntl.h> +#include <link.h> +#include <sys/stat.h> #include "subunit.h" #include "utils.h" @@ -112,3 +116,46 @@ int test_harness(int (test_function)(void), char *name) return rc; } + +static char auxv[4096]; + +void *get_auxv_entry(int type) +{ + ElfW(auxv_t) *p; + void *result; + ssize_t num; + int fd; + + fd = open("/proc/self/auxv", O_RDONLY); + if (fd == -1) { + perror("open"); + return NULL; + } + + result = NULL; + + num = read(fd, auxv, sizeof(auxv)); + if (num < 0) { + perror("read"); + goto out; + } + + if (num > sizeof(auxv)) { + printf("Overflowed auxv buffer\n"); + goto out; + } + + p = (ElfW(auxv_t) *)auxv; + + while (p->a_type != AT_NULL) { + if (p->a_type == type) { + result = (void *)p->a_un.a_val; + break; + } + + p++; + } +out: + close(fd); + return result; +} |