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Add ARC support
This adds support for the ARC architecture to libffi. DesignWare ARC is a family of processors from Synopsys, Inc. This patch has been tested on a little-endian system and passes the testsuite. Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
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/* ----------------------------------------------------------------------- | ||
arcompact.S - Copyright (c) 2013 Synposys, Inc. (www.synopsys.com) | ||
ARCompact Foreign Function Interface | ||
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 RENESAS TECHNOLOGY 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. | ||
----------------------------------------------------------------------- */ | ||
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#define LIBFFI_ASM | ||
#include <fficonfig.h> | ||
#include <ffi.h> | ||
#ifdef HAVE_MACHINE_ASM_H | ||
#include <machine/asm.h> | ||
#else | ||
#define CNAME(x) x | ||
#define ENTRY(x) .globl CNAME(x)` .type CNAME(x),%function` CNAME(x): | ||
#endif | ||
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.text | ||
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/* R0: ffi_prep_args */ | ||
/* R1: &ecif */ | ||
/* R2: cif->bytes */ | ||
/* R3: fig->flags */ | ||
/* R4: ecif.rvalue */ | ||
/* R5: fn */ | ||
ENTRY(ffi_call_ARCompact) | ||
/* Save registers. */ | ||
st.a fp, [sp, -4] /* fp + 20, fp */ | ||
push_s blink /* fp + 16, blink */ | ||
st.a r4, [sp, -4] /* fp + 12, ecif.rvalue */ | ||
push_s r3 /* fp + 8, fig->flags */ | ||
st.a r5, [sp, -4] /* fp + 4, fn */ | ||
push_s r2 /* fp + 0, cif->bytes */ | ||
mov fp, sp | ||
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/* Make room for all of the new args. */ | ||
sub sp, sp, r2 | ||
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/* Place all of the ffi_prep_args in position. */ | ||
/* ffi_prep_args(char *stack, extended_cif *ecif) */ | ||
/* R1 already set. */ | ||
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/* And call. */ | ||
jl_s.d [r0] | ||
mov_s r0, sp | ||
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ld.ab r12, [fp, 4] /* cif->bytes */ | ||
ld.ab r11, [fp, 4] /* fn */ | ||
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/* Move first 8 parameters in registers... */ | ||
ld_s r0, [sp] | ||
ld_s r1, [sp, 4] | ||
ld_s r2, [sp, 8] | ||
ld_s r3, [sp, 12] | ||
ld r4, [sp, 16] | ||
ld r5, [sp, 20] | ||
ld r6, [sp, 24] | ||
ld r7, [sp, 28] | ||
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/* ...and adjust the stack. */ | ||
min r12, r12, 32 | ||
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/* Call the function. */ | ||
jl.d [r11] | ||
add sp, sp, r12 | ||
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mov sp, fp | ||
pop_s r3 /* fig->flags, return type */ | ||
pop_s r2 /* ecif.rvalue, pointer for return value */ | ||
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/* If the return value pointer is NULL, assume no return value. */ | ||
breq.d r2, 0, epilogue | ||
pop_s blink | ||
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/* Return INT. */ | ||
brne r3, FFI_TYPE_INT, return_double | ||
b.d epilogue | ||
st_s r0, [r2] | ||
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return_double: | ||
brne r3, FFI_TYPE_DOUBLE, epilogue | ||
st_s r0, [r2] | ||
st_s r1, [r2,4] | ||
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epilogue: | ||
j_s.d [blink] | ||
ld.ab fp, [sp, 4] | ||
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ENTRY(ffi_closure_ARCompact) | ||
st.a r0, [sp, -32] | ||
st_s r1, [sp, 4] | ||
st_s r2, [sp, 8] | ||
st_s r3, [sp, 12] | ||
st r4, [sp, 16] | ||
st r5, [sp, 20] | ||
st r6, [sp, 24] | ||
st r7, [sp, 28] | ||
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/* pointer to arguments */ | ||
mov_s r2, sp | ||
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/* return value goes here */ | ||
sub sp, sp, 8 | ||
mov_s r1, sp | ||
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push_s blink | ||
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bl.d ffi_closure_inner_ARCompact | ||
mov_s r0, r8 /* codeloc, set by trampoline */ | ||
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pop_s blink | ||
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/* set return value to r1:r0 */ | ||
pop_s r0 | ||
pop_s r1 | ||
j_s.d [blink] | ||
add_s sp, sp, 32 |
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