diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/am33/sysdep.h')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/am33/sysdep.h | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/am33/sysdep.h b/ports/sysdeps/unix/sysv/linux/am33/sysdep.h deleted file mode 100644 index 63fe716594..0000000000 --- a/ports/sysdeps/unix/sysv/linux/am33/sysdep.h +++ /dev/null @@ -1,316 +0,0 @@ -/* Copyright 2001-2014 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Alexandre Oliva <aoliva@redhat.com>. - Based on ../i386/sysdep.h. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library. If not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _LINUX_AM33_SYSDEP_H -#define _LINUX_AM33_SYSDEP_H 1 - -/* There is some commonality. */ -#include "../../../am33/sysdep.h" - -/* 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 - -#ifdef __ASSEMBLER__ - -/* 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 savely - test with -4095. */ - -/* We don't want the label for the error handle to be global when we define - it here. */ -#ifdef PIC -# define SYSCALL_ERROR_LABEL 0f -#else -# define SYSCALL_ERROR_LABEL syscall_error -#endif - -#undef PSEUDO -#define PSEUDO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - cmp -126,d0; \ - bls L(pseudo_end); \ - jmp SYSCALL_ERROR_LABEL; \ - L(pseudo_end): \ - mov d0,a0; - -#undef PSEUDO_END -#define PSEUDO_END(name) \ - SYSCALL_ERROR_HANDLER \ - END (name) - -#undef PSEUDO_NOERROR -#define PSEUDO_NOERRNO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args) - -#undef PSEUDO_END_NOERRNO -#define PSEUDO_END_NOERRNO(name) \ - END (name) - -#define ret_NOERRNO ret - -/* The function has to return the error code. */ -#undef PSEUDO_ERRVAL -#define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - clr d1; \ - sub d0,d1,d0 - -#undef PSEUDO_END_ERRVAL -#define PSEUDO_END_ERRVAL(name) \ - END (name) - -#define ret_ERRVAL ret - -#ifndef PIC -#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -#else -/* Store (- d0) into errno through the GOT. */ -#ifdef _LIBC_REENTRANT -#define SYSCALL_ERROR_HANDLER \ -0:movm [d2,a2],(sp); \ - add -12,sp; \ -1:mov pc,a2; \ - add _GLOBAL_OFFSET_TABLE_-(1b-.),a2; \ - clr d2; \ - sub d0,d2; \ - call __errno_location@PLT,[],0; \ - mov d2,(a0); \ - add 12,sp; \ - movm (sp),[d2,a2]; \ - mov -1,d0; \ - mov d0,a0; \ - jmp L(pseudo_end); -/* A quick note: it is assumed that the call to `__errno_location' does - not modify the stack! */ -#else -#define SYSCALL_ERROR_HANDLER \ -0:mov pc,a0; \ - add _GLOBAL_OFFSET_TABLE_-(0b-.),a0; \ - clr d1; \ - sub d0,d1; \ - mov (errno@GOT,a0),a1; \ - mov d1,(a0); \ - mov -1,d0; \ - mov d0,a0; \ - jmp L(pseudo_end); -#endif /* _LIBC_REENTRANT */ -#endif /* PIC */ - -/* Linux takes system call arguments in registers: - - syscall number d0 call-clobbered - arg 1 a0 call-clobbered - arg 2 d1 call-clobbered - arg 3 a3 call-saved - arg 4 a2 call-saved - arg 5 d3 call-saved - arg 6 d2 call-saved - - The stack layout upon entering the function is: - - (24,sp) Arg# 6 - (20,sp) Arg# 5 - (16,sp) Arg# 4 - (12,sp) Arg# 3 - d1 Arg# 2 - d0 Arg# 1 - (sp) Return address - - (Of course a function with say 3 arguments does not have entries for - arguments 4, 5 and 6.) */ - -#undef DO_CALL -#define DO_CALL(syscall_name, args) \ - PUSHARGS_##args \ - DOARGS_##args \ - mov SYS_ify (syscall_name),d0; \ - syscall 0 \ - POPARGS_##args - -#define PUSHARGS_0 /* No arguments to push. */ -#define _DOARGS_0(N) /* No arguments to frob. */ -#define DOARGS_0 /* No arguments to frob. */ -#define POPARGS_0 /* No arguments to pop. */ - -#define PUSHARGS_1 /* No arguments to push. */ -#define _DOARGS_1(N) _DOARGS_0 (N-4) mov d0,a0; -#define DOARGS_1 _DOARGS_1 (4) -#define POPARGS_1 /* No arguments to pop. */ - -#define PUSHARGS_2 /* No arguments to push. */ -#define _DOARGS_2(N) _DOARGS_1 (N-4) /* Argument already in d1. */ -#define DOARGS_2 _DOARGS_2 (8) -#define POPARGS_2 /* No arguments to pop. */ - -#define PUSHARGS_3 movm [a3],(sp); -#define _DOARGS_3(N) _DOARGS_2 (N-4) mov (N,sp),a3; -#define DOARGS_3 _DOARGS_3 (16) -#define POPARGS_3 ; movm (sp),[a3] - -#define PUSHARGS_4 movm [a2,a3],(sp); -#define _DOARGS_4(N) _DOARGS_3 (N-4) mov (N,sp),a2; -#define DOARGS_4 _DOARGS_4 (24) -#define POPARGS_4 ; movm (sp),[a2,a3] - -#define PUSHARGS_5 movm [d3,a2,a3],(sp); -#define _DOARGS_5(N) _DOARGS_4 (N-4) mov (N,sp),d3; -#define DOARGS_5 _DOARGS_5 (32) -#define POPARGS_5 ; movm (sp),[d3,a2,a3] - -#define PUSHARGS_6 movm [d2,d3,a2,a3],(sp); -#define _DOARGS_6(N) _DOARGS_5 (N-4) mov (N,sp),d2; -#define DOARGS_6 _DOARGS_6 (40) -#define POPARGS_6 ; movm (sp),[d2,d3,a2,a3] - -#else /* !__ASSEMBLER__ */ - -/* Define a macro which expands inline into the wrapper code for a system - call. */ -#undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \ - if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (resultvar, ), 0)) \ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \ - resultvar = 0xffffffff; \ - } \ - (int) resultvar; }) - -#define INTERNAL_SYSCALL(name, err, nr, args...) \ -({ \ - register long __sc0 asm ("d0") = __NR_##name; \ - inline_syscall##nr(name, ## args); \ - __sc0; \ -}) - -#undef INTERNAL_SYSCALL_DECL -#define INTERNAL_SYSCALL_DECL(err) do { } while (0) - -#undef INTERNAL_SYSCALL_ERROR_P -#define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned int) (val) >= (unsigned long)-125) - -#undef INTERNAL_SYSCALL_ERRNO -#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -#define inline_syscall0(name,dummy...) \ -__asm__ __volatile__ ("syscall 0" \ - : "+d" (__sc0) \ - : : "memory") - -#define inline_syscall1(name,arg1) \ -register long __sc1 asm ("a0") = (long) (arg1); \ -inline_syscall0 (name); \ -__asm__ __volatile__ ("" : : "r" (__sc1)) - -#define inline_syscall2(name,arg1,arg2) \ -register long __sc2 asm ("d1") = (long) (arg2); \ -inline_syscall1 (name,(arg1)); \ -__asm__ __volatile__ ("" : : "r" (__sc2)) - -/* We can't tell whether a3 is going to be eliminated in the enclosing - function, so we have to assume it isn't. We first load the value - of any arguments into their registers, except for a3 itself, that - may be needed to load the value of the other arguments. Then, we - save a3's value in some other register, and load the argument value - into a3. We have to force both a3 and its copy to be live in - different registers at the same time, to avoid having the copy - spilled and the value reloaded into the same register, in which - case we'd be unable to get the value of a3 back, should the stack - slot reference be (offset,a3). */ -#define inline_syscall3(name,arg1,arg2,arg3) \ -long __sc3v = (long) (arg3); \ -register long __sc1 asm ("a0") = (long) (arg1); \ -register long __sc2 asm ("d1") = (long) (arg2); \ -register long __sc3 asm ("a3") = __sc3; \ -register long __sc3c; \ -__asm__ __volatile__ ("mov %1,%0" : "=&r" (__sc3c) : "r" (__sc3)); \ -__sc3 = __sc3v; \ -__asm__ __volatile__ ("" : : "r" (__sc3c), "r" (__sc3)); \ -inline_syscall0 (name); \ -__sc3 = __sc3c; \ -__asm__ __volatile__ ("" : : "r" (__sc3), "r" (__sc2), "r" (__sc1)) - -#ifdef PIC -/* Since a2 is the PIC register, it requires similar handling as a3 - when we're generating PIC, as a2's value may be needed to load - arguments whose values live in global variables. The difference is - that we don't need to require its value to be live in a register; - it may well be in a stack slot, as long as we save it before - clobbering a3 and restore it after restoring a3. */ -#define inline_syscall4(name,arg1,arg2,arg3,arg4) \ -long __sc4v = (long) (arg4); \ -long __sc3v = (long) (arg3); \ -register long __sc1 asm ("a0") = (long) (arg1); \ -register long __sc2 asm ("d1") = (long) (arg2); \ -register long __sc3 asm ("a3") = __sc3; \ -register long __sc3c; \ -register long __sc4 asm ("a2") = __sc4; \ -long __sc4c = __sc4; \ -__sc4 = __sc4v; \ -__asm__ __volatile__ ("mov %1,%0" : "=&r" (__sc3c) : "r" (__sc3)); \ -__sc3 = __sc3v; \ -__asm__ __volatile__ ("" : : "r" (__sc3c), "r" (__sc3), "r" (__sc4)); \ -inline_syscall0 (name); \ -__sc3 = __sc3c; \ -__sc4 = __sc4c; \ -__asm__ __volatile__ ("" : : "r" (__sc4), "r" (__sc3), \ - "r" (__sc2), "r" (__sc1)) -#else -#define inline_syscall4(name,arg1,arg2,arg3,arg4) \ -register long __sc4 asm ("a2") = (long) (arg4); \ -inline_syscall3 (name,(arg1),(arg2),(arg3)); \ -__asm__ __volatile__ ("" : : "r" (__sc4)) -#endif - -#define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \ -register long __sc5 asm ("d3") = (long) (arg5); \ -inline_syscall4 (name,(arg1),(arg2),(arg3),(arg4)); \ -__asm__ __volatile__ ("" : : "r" (__sc5)) - -#define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \ -register long __sc6 asm ("d2") = (long) (arg6); \ -inline_syscall5 (name,(arg1),(arg2),(arg3),(arg4),(arg5)); \ -__asm__ __volatile__ ("" : : "r" (__sc6)) - -#endif /* __ASSEMBLER__ */ - -#endif /* linux/am33/sysdep.h */ |