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60bf84cf4c
Register fp (frame pointer) is a bad choice for compilations without optimisation, because the compiler makes heavy use of this register (so the resulting code crashes). Register s0 had been used for TCG_AREG1 in earlier releases, but was no longer used and is now free for TCG_AREG0. The resulting code works for compilations without optimisation (tested with qemu mips in qemu mips on x86 host). Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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* dyngen defines for micro operation code
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__DYNGEN_EXEC_H__)
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#define __DYNGEN_EXEC_H__
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/* prevent Solaris from trying to typedef FILE in gcc's
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include/floatingpoint.h which will conflict with the
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definition down below */
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#ifdef __sun__
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#define _FILEDEFED
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#endif
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/* NOTE: standard headers should be used with special care at this
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point because host CPU registers are used as global variables. Some
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host headers do not allow that. */
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __OpenBSD__
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#include <sys/types.h>
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#endif
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/* XXX: This may be wrong for 64-bit ILP32 hosts. */
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typedef void * host_reg_t;
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#ifdef CONFIG_BSD
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typedef struct __sFILE FILE;
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#else
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typedef struct FILE FILE;
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#endif
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extern int fprintf(FILE *, const char *, ...);
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extern int fputs(const char *, FILE *);
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extern int printf(const char *, ...);
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#if defined(__i386__)
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#define AREG0 "ebp"
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#elif defined(__x86_64__)
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#define AREG0 "r14"
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#elif defined(_ARCH_PPC)
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#define AREG0 "r27"
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#elif defined(__arm__)
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#define AREG0 "r7"
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#elif defined(__hppa__)
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#define AREG0 "r17"
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#elif defined(__mips__)
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#define AREG0 "s0"
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#elif defined(__sparc__)
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#ifdef CONFIG_SOLARIS
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#define AREG0 "g2"
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#else
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#ifdef __sparc_v9__
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#define AREG0 "g5"
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#else
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#define AREG0 "g6"
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#endif
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#endif
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#elif defined(__s390__)
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#define AREG0 "r10"
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#elif defined(__alpha__)
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/* Note $15 is the frame pointer, so anything in op-i386.c that would
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require a frame pointer, like alloca, would probably loose. */
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#define AREG0 "$15"
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#elif defined(__mc68000)
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#define AREG0 "%a5"
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#elif defined(__ia64__)
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#define AREG0 "r7"
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#else
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#error unsupported CPU
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#endif
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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/* The return address may point to the start of the next instruction.
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Subtracting one gets us the call instruction itself. */
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#if defined(__s390__) && !defined(__s390x__)
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# define GETPC() ((void*)(((unsigned long)__builtin_return_address(0) & 0x7fffffffUL) - 1))
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#elif defined(__arm__)
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/* Thumb return addresses have the low bit set, so we need to subtract two.
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This is still safe in ARM mode because instructions are 4 bytes. */
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# define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 2))
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#else
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# define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 1))
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#endif
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#endif /* !defined(__DYNGEN_EXEC_H__) */
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