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44abffe33a
* tccgen: re-allow long double constants for x87 cross
sizeof (long double) may be 12 or 16 depending on host platform
(i386/x86_64 on unix/windows).
Except that it's 8 if the host is on windows and not gcc
was used to compile tcc.
* win64: fix builtin_va_start after VT_REF removal
See also a8b83ce43a
* tcctest.c: remove outdated limitation for ll-bitfield test
It always worked, there is no reason why it should not work
in future.
* libtcc1.c: exclude long double conversion on ARM
* Makefile: remove CFLAGS from link recipes
* lib/Makefile: use target DEFINES as passed from main Makefile
* lib/armflush.c lib/va_list.c: factor out from libtcc1.c
* arm-gen.c: disable "depreciated" warnings for now
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* armflush.c - flush the instruction cache
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__clear_cache is used in tccrun.c, It is a built-in
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intrinsic with gcc. However tcc in order to compile
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itself needs this function */
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#ifdef __TINYC__
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/* syscall wrapper */
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unsigned syscall(unsigned syscall_nr, ...);
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/* arm-tcc supports only fake asm currently */
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__asm__(
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".global syscall\n"
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"syscall:\n"
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".int 0xe92d4080\n" // push {r7, lr}
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".int 0xe1a07000\n" // mov r7, r0
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".int 0xe1a00001\n" // mov r0, r1
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".int 0xe1a01002\n" // mov r1, r2
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".int 0xe1a02003\n" // mov r2, r3
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".int 0xef000000\n" // svc 0x00000000
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".int 0xe8bd8080\n" // pop {r7, pc}
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);
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/* from unistd.h: */
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#if defined(__thumb__) || defined(__ARM_EABI__)
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# define __NR_SYSCALL_BASE 0x0
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#else
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# define __NR_SYSCALL_BASE 0x900000
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#endif
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#define __ARM_NR_BASE (__NR_SYSCALL_BASE+0x0f0000)
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#define __ARM_NR_cacheflush (__ARM_NR_BASE+2)
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#else
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#define _GNU_SOURCE
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <stdio.h>
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#endif
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/* Flushing for tccrun */
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void __clear_cache(void *beginning, void *end)
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{
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/* __ARM_NR_cacheflush is kernel private and should not be used in user space.
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* However, there is no ARM asm parser in tcc so we use it for now */
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#if 1
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syscall(__ARM_NR_cacheflush, beginning, end, 0);
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#else
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__asm__ ("push {r7}\n\t"
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"mov r7, #0xf0002\n\t"
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"mov r2, #0\n\t"
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"swi 0\n\t"
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"pop {r7}\n\t"
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"ret");
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#endif
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}
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