diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/cris/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/cris/sysdep.h | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/sysdeps/unix/sysv/linux/cris/sysdep.h b/sysdeps/unix/sysv/linux/cris/sysdep.h deleted file mode 100644 index 5013dd5d30..0000000000 --- a/sysdeps/unix/sysv/linux/cris/sysdep.h +++ /dev/null @@ -1,226 +0,0 @@ -/* Assembler macros for CRIS. - Copyright (C) 1999, 2001, 2003 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <asm/unistd.h> -#include <sysdeps/cris/sysdep.h> -#include <sys/syscall.h> -#include "config.h" - -#undef SYS_ify -#define SYS_ify(syscall_name) (__NR_##syscall_name) - - -#ifdef __ASSEMBLER__ - -/* For Linux we can use the system call table in the header file - /usr/include/asm/unistd.h - of the kernel. But these symbols do not follow the SYS_* syntax - so we have to redefine the `SYS_ify' macro here. */ -#undef SYS_ify -#define SYS_ify(syscall_name) __NR_##syscall_name - -/* ELF-like local names start with `.L'. */ -#undef L -#define L(name) .L##name - -/* Linux uses a negative return value to indicate syscall errors, - unlike most Unices, which use the condition codes' carry flag. - - Since version 2.1 the return value of a system call might be - negative even if the call succeeded. E.g., the `lseek' system call - might return a large offset. Therefore we must not anymore test - for < 0, but test for a real error by making sure the value in %eax - is a real error number. Linus said he will make sure the no syscall - returns a value in -1 .. -4095 as a valid result so we can safely - test with -4095. */ - -/* Syscall wrappers consist of - #include <sysdep.h> - PSEUDO (...) - ret - PSEUDO_END (...) - - which expand to the following. */ - -/* Linux takes system call arguments in registers: - syscall number R9 - arg 1 R10 - arg 2 R11 - arg 3 R12 - arg 4 R13 - arg 5 MOF - arg 6 SRP - - The compiler calls us by the C convention: - syscall number in the DO_CALL macro - arg 1 R10 - arg 2 R11 - arg 3 R12 - arg 4 R13 - arg 5 [SP] - arg 6 [SP + 4] - */ - -/* Note that we use "bhs", since we want to match - (unsigned) -4096 .. 0xffffffff. Using "ble" would match - -4096 .. -2**31. */ -#define PSEUDO(name, syscall_name, args) \ - ENTRY (name) @ \ - DOARGS_##args @ \ - movu.w SYS_ify (syscall_name),$r9 @ \ - break 13 @ \ - cmps.w -4096,$r10 @ \ - bhs 0f @ \ - nop @ \ - UNDOARGS_return_##args - -/* Ouch! We have to remember not to use "ret" in assembly-code. - ("Luckily", mnemonics are case-insensitive.) - Note that we assume usage is exactly: - PSEUDO (...) - ret - PSEUDO_END (...) - so we can put all payload into PSEUDO (except for error handling). */ - -#define ret - -#define PSEUDO_END(name) \ -0: @ \ - SETUP_PIC @ \ - PLTJUMP (syscall_error) @ \ - END (name) - -#define PSEUDO_NOERRNO(name, syscall_name, args) \ - ENTRY (name) @ \ - DOARGS_##args @ \ - movu.w SYS_ify (syscall_name),$r9 @ \ - break 13 @ \ - UNDOARGS_return_##args - -#define ret_NOERRNO - -#define PSEUDO_END_NOERRNO(name) \ - END (name) - -#define DOARGS_0 -#define DOARGS_1 -#define DOARGS_2 -#define DOARGS_3 -#define DOARGS_4 -#define DOARGS_5 \ - move [$sp],$mof - -/* To avoid allocating stack-space, we re-use the arg 5 (MOF) entry by - storing SRP into it. If called with too-few arguments, we will crash, - but that will happen in the general case too. */ -#define DOARGS_6 \ - DOARGS_5 @ \ - move $srp,[$sp] @ \ - move [$sp+4],$srp - -#define UNDOARGS_return_0 \ - Ret @ \ - nop - -#define UNDOARGS_return_1 UNDOARGS_return_0 -#define UNDOARGS_return_2 UNDOARGS_return_0 -#define UNDOARGS_return_3 UNDOARGS_return_0 -#define UNDOARGS_return_4 UNDOARGS_return_0 -#define UNDOARGS_return_5 UNDOARGS_return_0 - -/* We assume the following code will be "ret" and "PSEUDO_END". */ -#define UNDOARGS_return_return_6 \ - jump [$sp] - -#else /* not __ASSEMBLER__ */ - -#undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - unsigned long __sys_res; \ - register unsigned long __res asm ("r10"); \ - LOAD_ARGS_c_##nr (args) \ - register unsigned long __callno asm ("r9") \ - = SYS_ify (name); \ - asm volatile (LOAD_ARGS_asm_##nr (args) \ - "break 13" \ - : "=r" (__res) \ - : ASM_ARGS_##nr (args) \ - : ASM_CLOBBER_##nr); \ - __sys_res = __res; \ - \ - if (__sys_res >= (unsigned long) -4096) \ - { \ - __set_errno (- __sys_res); \ - __sys_res = (unsigned long) -1; \ - } \ - (long int) __sys_res; \ - }) - -#define LOAD_ARGS_c_0() -#define LOAD_ARGS_asm_0() -#define ASM_CLOBBER_0 "memory" -#define ASM_ARGS_0() "r" (__callno) - -#define LOAD_ARGS_c_1(r10) \ - LOAD_ARGS_c_0() \ - register unsigned long __r10 __asm__ ("r10") = (unsigned long) (r10); -#define LOAD_ARGS_asm_1(r10) LOAD_ARGS_asm_0 () -#define ASM_CLOBBER_1 ASM_CLOBBER_0 -#define ASM_ARGS_1(r10) ASM_ARGS_0 (), "0" (__r10) - -#define LOAD_ARGS_c_2(r10, r11) \ - LOAD_ARGS_c_1(r10) \ - register unsigned long __r11 __asm__ ("r11") = (unsigned long) (r11); -#define LOAD_ARGS_asm_2(r10, r11) LOAD_ARGS_asm_1 (r10) -#define ASM_CLOBBER_2 ASM_CLOBBER_1 -#define ASM_ARGS_2(r10, r11) ASM_ARGS_1 (r10), "r" (__r11) - -#define LOAD_ARGS_c_3(r10, r11, r12) \ - LOAD_ARGS_c_2(r10, r11) \ - register unsigned long __r12 __asm__ ("r12") = (unsigned long) (r12); -#define LOAD_ARGS_asm_3(r10, r11, r12) LOAD_ARGS_asm_2 (r10, r11) -#define ASM_CLOBBER_3 ASM_CLOBBER_2 -#define ASM_ARGS_3(r10, r11, r12) ASM_ARGS_2 (r10, r11), "r" (__r12) - -#define LOAD_ARGS_c_4(r10, r11, r12, r13) \ - LOAD_ARGS_c_3(r10, r11, r12) \ - register unsigned long __r13 __asm__ ("r13") = (unsigned long) (r13); -#define LOAD_ARGS_asm_4(r10, r11, r12, r13) LOAD_ARGS_asm_3 (r10, r11, r12) -#define ASM_CLOBBER_4 ASM_CLOBBER_3 -#define ASM_ARGS_4(r10, r11, r12, r13) ASM_ARGS_3 (r10, r11, r12), "r" (__r13) - -#define LOAD_ARGS_c_5(r10, r11, r12, r13, mof) \ - LOAD_ARGS_c_4(r10, r11, r12, r13) -#define LOAD_ARGS_asm_5(r10, r11, r12, r13, mof) \ - LOAD_ARGS_asm_4 (r10, r11, r12, r13) "move %6,$mof\n\t" -#define ASM_CLOBBER_5 ASM_CLOBBER_4 -#define ASM_ARGS_5(r10, r11, r12, r13, mof) \ - ASM_ARGS_4 (r10, r11, r12, r13), "g" (mof) - -#define LOAD_ARGS_c_6(r10, r11, r12, r13, mof, srp) \ - LOAD_ARGS_c_5(r10, r11, r12, r13, mof) -#define LOAD_ARGS_asm_6(r10, r11, r12, r13, mof, srp) \ - LOAD_ARGS_asm_5(r10, r11, r12, r13, mof) \ - "move %7,$srp\n\t" -#define ASM_CLOBBER_6 ASM_CLOBBER_5, "srp" -#define ASM_ARGS_6(r10, r11, r12, r13, mof, srp) \ - ASM_ARGS_5 (r10, r11, r12, r13, mof), "g" (srp) - -#endif /* not __ASSEMBLER__ */ |