diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/arch/sparc/SYS.h | 84 |
1 files changed, 38 insertions, 46 deletions
diff --git a/lib/libc/arch/sparc/SYS.h b/lib/libc/arch/sparc/SYS.h index e9214278919..c7a67cfeb5b 100644 --- a/lib/libc/arch/sparc/SYS.h +++ b/lib/libc/arch/sparc/SYS.h @@ -34,7 +34,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $OpenBSD: SYS.h,v 1.4 2000/10/04 06:12:39 d Exp $ + * $OpenBSD: SYS.h,v 1.5 2000/10/11 01:49:43 d Exp $ */ #include <machine/asm.h> @@ -42,9 +42,11 @@ #include <machine/trap.h> #ifdef __STDC__ -#define __CONCAT(x,y) x##y +#define _CAT(x,y) x##y +#define __ENTRY(p,x) ENTRY(p##x) #else -#define __CONCAT(x,y) x/**/y +#define _CAT(x,y) x/**/y +#define __ENTRY(p,x) ENTRY(p/**/x) #endif /* @@ -52,65 +54,55 @@ * change it to be position independent later, if need be. */ #ifdef PIC -#define ERROR() \ - PIC_PROLOGUE(%g1,%g2); \ - ld [%g1+cerror],%g2; \ - jmp %g2; \ - nop -#else /* !PIC */ -#define ERROR() \ - sethi %hi(cerror),%g1; \ - or %lo(cerror),%g1,%g1; \ - jmp %g1; \ - nop +#define ERROR() \ + PIC_PROLOGUE(%g1,%g2); \ + ld [%g1+cerror],%g2; jmp %g2; nop +#else +#define ERROR() \ + sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop #endif /* - * Syscall symbols are weakened for easy replacement by - * the user thread library. - */ -#define _THREAD_SYS(x) __CONCAT(_thread_sys_,x) -#define _THREAD_SYS_LABEL(x) __CONCAT(_C_LABEL(_thread_sys_),x) -#define SYSENTRY(x) \ - .weak _C_LABEL(x); \ - _C_LABEL(x) = _THREAD_SYS_LABEL(x); \ - .type _C_LABEL(x),@function; \ - _ENTRY(_THREAD_SYS_LABEL(x)) - -/* * SYSCALL is used when further action must be taken before returning. * Note that it adds a `nop' over what we could do, if we only knew what * came at label 1.... */ -#define SYSCALL(x) \ - SYSENTRY(x); \ - mov __CONCAT(SYS_,x),%g1; \ - t ST_SYSCALL; \ - bcc 1f; \ - nop; \ - ERROR(); \ - 1: +#define __SYSCALL(p,x) \ + __ENTRY(p,x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1: /* * RSYSCALL is used when the system call should just return. Here * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2 * and avoid a branch. */ -#define RSYSCALL(x) \ - SYSENTRY(x); \ - mov (__CONCAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; \ - add %o7,8,%g2; \ - t ST_SYSCALL; \ - ERROR() +#define __RSYSCALL(p,x) \ + __ENTRY(p,x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ + t ST_SYSCALL; ERROR() /* * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x. */ -#define PSEUDO(x,y) \ - SYSENTRY(x); \ - mov (__CONCAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; \ - add %o7,8,%g2; \ - t ST_SYSCALL; \ - ERROR() +#define __PSEUDO(p,x,y) \ + __ENTRY(p,x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ + t ST_SYSCALL; ERROR() +#ifdef _THREAD_SAFE +/* + * For the thread_safe versions, we prepend _thread_sys_ to the function + * name so that the 'C' wrapper can go around the real name. + */ +# define SYSCALL(x) __SYSCALL(_thread_sys_,x) +# define RSYSCALL(x) __RSYSCALL(_thread_sys_,x) +# define PSEUDO(x,y) __PSEUDO(_thread_sys_,x,y) +# define SYSENTRY(x) __ENTRY(_thread_sys_,x) +#else _THREAD_SAFE +/* + * The non-threaded library defaults to traditional syscalls where + * the function name matches the syscall name. + */ +# define SYSCALL(x) __SYSCALL(,x) +# define RSYSCALL(x) __RSYSCALL(,x) +# define PSEUDO(x,y) __PSEUDO(,x,y) +# define SYSENTRY(x) __ENTRY(,x) +#endif _THREAD_SAFE .globl cerror |