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S/390 fake TCG implementation

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Qemu won't let us run a KVM target without having host TCG support. Well, for
now we don't have any so let's implement a fake target that only stubs out
everything.

I tried to keep the patch as close to Uli's source as possible, so whenever
he feels like it he can easily diff his version against this one.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Alexander Graf 2009-12-05 12:44:23 +01:00 committed by Aurelien Jarno
parent 24e804ec14
commit 2827822ef1
3 changed files with 175 additions and 1 deletions
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2
dyngen-exec.h
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@ -117,7 +117,7 @@ extern int printf(const char *, ...);
/* The return address may point to the start of the next instruction.
Subtracting one gets us the call instruction itself. */
#if defined(__s390__)
#if defined(__s390__) && !defined(__s390x__)
# define GETPC() ((void*)(((unsigned long)__builtin_return_address(0) & 0x7fffffffUL) - 1))
#elif defined(__arm__)
/* Thumb return addresses have the low bit set, so we need to subtract two.

105
tcg/s390/tcg-target.c Normal file
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@ -0,0 +1,105 @@
/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2009 Ulrich Hecht <uli@suse.de>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
static const int tcg_target_reg_alloc_order[] = {
};
static const int tcg_target_call_iarg_regs[] = {
};
static const int tcg_target_call_oarg_regs[] = {
};
static void patch_reloc(uint8_t *code_ptr, int type,
tcg_target_long value, tcg_target_long addend)
{
tcg_abort();
}
static inline int tcg_target_get_call_iarg_regs_count(int flags)
{
tcg_abort();
return 0;
}
/* parse target specific constraints */
static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
{
tcg_abort();
return 0;
}
/* Test if a constant matches the constraint. */
static inline int tcg_target_const_match(tcg_target_long val,
const TCGArgConstraint *arg_ct)
{
tcg_abort();
return 0;
}
/* load a register with an immediate value */
static inline void tcg_out_movi(TCGContext *s, TCGType type,
int ret, tcg_target_long arg)
{
tcg_abort();
}
/* load data without address translation or endianness conversion */
static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_abort();
}
static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_abort();
}
static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args, const int *const_args)
{
tcg_abort();
}
void tcg_target_init(TCGContext *s)
{
/* gets called with KVM */
}
void tcg_target_qemu_prologue(TCGContext *s)
{
/* gets called with KVM */
}
static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
{
tcg_abort();
}
static inline void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
{
tcg_abort();
}

69
tcg/s390/tcg-target.h Normal file
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@ -0,0 +1,69 @@
/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2009 Ulrich Hecht <uli@suse.de>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#define TCG_TARGET_S390 1
#define TCG_TARGET_REG_BITS 64
#define TCG_TARGET_WORDS_BIGENDIAN
enum {
TCG_REG_R0 = 0,
TCG_REG_R1,
TCG_REG_R2,
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
TCG_REG_R13,
TCG_REG_R14,
TCG_REG_R15
};
#define TCG_TARGET_NB_REGS 16
/* used for function call generation */
#define TCG_REG_CALL_STACK TCG_REG_R15
#define TCG_TARGET_STACK_ALIGN 8
#define TCG_TARGET_CALL_STACK_OFFSET 0
enum {
/* Note: must be synced with dyngen-exec.h */
TCG_AREG0 = TCG_REG_R10,
TCG_AREG1 = TCG_REG_R7,
TCG_AREG2 = TCG_REG_R8,
TCG_AREG3 = TCG_REG_R9,
};
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
#if QEMU_GNUC_PREREQ(4, 1)
__builtin___clear_cache((char *) start, (char *) stop);
#else
#error not implemented
#endif
}