diff options
| author | Steven J. Magnani <steve@digidescorp.com> | 2010-11-10 19:27:57 +0100 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2010-11-10 19:44:36 +0100 |
| commit | 54f73a98f6b841f05484e2275c860ae61d49aae2 (patch) | |
| tree | 17478ac53eb5d0c3f770a27960c90439631a590e /libc/sysdeps/linux/microblaze/bits/syscalls.h | |
| parent | 2be86fb41e29def10eec97e5f663cc8147227358 (diff) | |
microblaze: syscall interface
Fix the microblaze syscall interface.
Recent mainline kernels no longer carry userland code to invoke syscalls
and microblaze can use the uClibc generic code.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/microblaze/bits/syscalls.h')
| -rw-r--r-- | libc/sysdeps/linux/microblaze/bits/syscalls.h | 54 |
1 files changed, 48 insertions, 6 deletions
diff --git a/libc/sysdeps/linux/microblaze/bits/syscalls.h b/libc/sysdeps/linux/microblaze/bits/syscalls.h index b21851333..f4bdc4522 100644 --- a/libc/sysdeps/linux/microblaze/bits/syscalls.h +++ b/libc/sysdeps/linux/microblaze/bits/syscalls.h @@ -4,12 +4,54 @@ # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." #endif -#include <features.h> -/* Do something very evil for now. Until we create our own syscall - * macros, short circuit bits/sysnum.h and use asm/unistd.h instead */ -#warning "fixme -- add arch specific syscall macros.h" -#include <asm/unistd.h> +#ifndef __ASSEMBLER__ -#endif /* _BITS_SYSCALLS_H */ +#include <errno.h> + +#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ + ({ \ + register int __ret __asm__("r3"); \ + register int _scno __asm__("r12") = name; \ + LOAD_ARGS_##nr (args); \ + __asm__ __volatile__("brki r14, 0x8" \ + : "=r" (__ret) \ + : "r"(_scno) ASM_ARGS_##nr \ + : __SYSCALL_CLOBBERS ); \ + __ret; \ + }) + +#define INTERNAL_SYSCALL_ERROR_P(val, err) \ + ((unsigned int)(val) >= 0xfffff001U) +#define LOAD_ARGS_0() do { } while(0) +#define ASM_ARGS_0 +#define LOAD_ARGS_1(a1) \ + register int _a1 __asm__("r5") = (int)(a1); \ + LOAD_ARGS_0() +#define ASM_ARGS_1 ASM_ARGS_0, "r"(_a1) +#define LOAD_ARGS_2(a1, a2) \ + register int _a2 __asm__("r6") = (int)(a2); \ + LOAD_ARGS_1(a1) +#define ASM_ARGS_2 ASM_ARGS_1, "r"(_a2) +#define LOAD_ARGS_3(a1, a2, a3) \ + register int _a3 __asm__("r7") = (int)(a3); \ + LOAD_ARGS_2(a1, a2) +#define ASM_ARGS_3 ASM_ARGS_2, "r"(_a3) +#define LOAD_ARGS_4(a1, a2, a3, a4) \ + register int _a4 __asm__("r8") = (int)(a4); \ + LOAD_ARGS_3(a1, a2, a3) +#define ASM_ARGS_4 ASM_ARGS_3, "r"(_a4) +#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ + register int _a5 __asm__("r9") = (int)(a5); \ + LOAD_ARGS_4(a1, a2, a3, a4) +#define ASM_ARGS_5 ASM_ARGS_4, "r"(_a5) +#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ + register int _a6 __asm__("r10") = (int)(a6); \ + LOAD_ARGS_5(a1, a2, a3, a4, a5) +#define ASM_ARGS_6 ASM_ARGS_5, "r"(_a6) + +#define __SYSCALL_CLOBBERS "r4", "r14", "cc", "memory" + +#endif /* __ASSEMBLER__ */ +#endif /* _BITS_SYSCALLS_H */ |