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| author | Andy Lutomirski <luto@kernel.org> | 2015-04-01 10:49:43 -0700 |
|---|---|---|
| committer | Andy Lutomirski <luto@kernel.org> | 2015-04-01 10:49:43 -0700 |
| commit | 74d4e3369594983d779fa4c53b61de5065d88a5a (patch) | |
| tree | 1b5a347020ca0ad00a09163819cf302f3acf0adc | |
| parent | 5f8fcc3d10bcecbe92eeef6f4d7ef5064fa0789b (diff) | |
| download | misc-tests-74d4e3369594983d779fa4c53b61de5065d88a5a.tar.gz | |
user_visible_state: Improve portability
| -rw-r--r-- | user_visible_state.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/user_visible_state.c b/user_visible_state.c index e33a985..704fd3d 100644 --- a/user_visible_state.c +++ b/user_visible_state.c @@ -5,11 +5,12 @@ #include <setjmp.h> #include <string.h> #include <xmmintrin.h> + +#ifdef __linux__ #include <asm/prctl.h> #include <sys/prctl.h> -#include <asm/ldt.h> - extern int arch_prctl(int, unsigned long); +#endif static void sethandler(int sig, void (*handler)(int, siginfo_t *, void *), int flags) @@ -182,13 +183,13 @@ static void show_segment(uint16_t index, int ldt) asm ("lsl %[selector], %[limit]\n\t" "jnz 1f\n\t" - "mov $1, %[has_limit]\n\t" + "movl $1, %[has_limit]\n\t" "1:" : [limit] "=r" (limit), [has_limit] "+rm" (has_limit) : [selector] "r" (selector)); asm ("larl %[selector], %[ar]\n\t" "jnz 1f\n\t" - "mov $1, %[has_ar]\n\t" + "movl $1, %[has_ar]\n\t" "1:" : [ar] "=r" (ar), [has_ar] "+rm" (has_ar) : [selector] "r" (selector)); @@ -221,8 +222,10 @@ static void show_segment(uint16_t index, int ldt) int main() { +#ifdef __linux__ // Optional: gives some visibility into how TLS works. arch_prctl(ARCH_SET_GS, 500); +#endif uint16_t gdtlimit = show_gdt_and_idt(); show_ldt(); |