diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc/kernel/sclow.S | |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sparc/kernel/sclow.S')
| -rw-r--r-- | arch/sparc/kernel/sclow.S | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/sparc/kernel/sclow.S b/arch/sparc/kernel/sclow.S new file mode 100644 index 000000000000..3a867fc19927 --- /dev/null +++ b/arch/sparc/kernel/sclow.S @@ -0,0 +1,86 @@ +/* sclow.S: Low level special syscall handling. + * Basically these are cases where we can completely + * handle the system call without saving any state + * because we know that the process will not sleep. + * + * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <asm/ptrace.h> +#include <asm/asm_offsets.h> +#include <asm/errno.h> +#include <asm/winmacro.h> +#include <asm/thread_info.h> +#include <asm/psr.h> +#include <asm/page.h> + +#define CC_AND_RETT \ + set PSR_C, %l4; \ + andn %l0, %l4, %l4; \ + wr %l4, 0x0, %psr; \ + nop; nop; nop; \ + jmp %l2; \ + rett %l2 + 4; + +#define SC_AND_RETT \ + set PSR_C, %l4; \ + or %l0, %l4, %l4; \ + wr %l4, 0x0, %psr; \ + nop; nop; nop; \ + jmp %l2; \ + rett %l2 + 4; + +#define LABEL(func) func##_low + + .globl LABEL(sunosnop) +LABEL(sunosnop): + CC_AND_RETT + +#if (ASIZ_task_uid == 2 && ASIZ_task_euid == 2) + .globl LABEL(sunosgetuid) +LABEL(sunosgetuid): + LOAD_CURRENT(l4, l5) + ld [%l4 + TI_TASK], %l4 + lduh [%l4 + AOFF_task_uid], %i0 + lduh [%l4 + AOFF_task_euid], %i1 + CC_AND_RETT +#endif + +#if (ASIZ_task_gid == 2 && ASIZ_task_egid == 2) + .globl LABEL(sunosgetgid) +LABEL(sunosgetgid): + LOAD_CURRENT(l4, l5) + ld [%l4 + TI_TASK], %l4 + lduh [%l4 + AOFF_task_gid], %i0 + lduh [%l4 + AOFF_task_egid], %i1 + CC_AND_RETT +#endif + + .globl LABEL(sunosmctl) +LABEL(sunosmctl): + mov 0, %i0 + CC_AND_RETT + + .globl LABEL(sunosgdtsize) +LABEL(sunosgdtsize): + mov 256, %i0 + CC_AND_RETT + + .globl LABEL(getpagesize) +LABEL(getpagesize): + set PAGE_SIZE, %i0 + CC_AND_RETT + + /* XXX sys_nice() XXX */ + /* XXX sys_setpriority() XXX */ + /* XXX sys_getpriority() XXX */ + /* XXX sys_setregid() XXX */ + /* XXX sys_setgid() XXX */ + /* XXX sys_setreuid() XXX */ + /* XXX sys_setuid() XXX */ + /* XXX sys_setfsuid() XXX */ + /* XXX sys_setfsgid() XXX */ + /* XXX sys_setpgid() XXX */ + /* XXX sys_getpgid() XXX */ + /* XXX sys_setsid() XXX */ + /* XXX sys_getsid() XXX */ |