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Retro68
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startup code: call FlushCache if necessary, inline a-traps

This commit is contained in:
Wolfgang Thaller 2012-04-06 01:04:43 +02:00
parent 1fef6246bf
commit 5a7c5aae74
1 changed files with 35 additions and 14 deletions
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49
libretro/start.c
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@ -3,6 +3,8 @@
#include <Processes.h>
#include <Sound.h>
#include <Memory.h>
#include <OSUtils.h>
int main(int argc, char* argv[]);
@ -29,19 +31,15 @@ struct flat_hdr {
};
typedef void (*voidFunction)(void);
//extern voidFunction __init_array_start[];
//extern voidFunction __init_array_end[];
extern void __init_section(void);
extern void __init_section_end(void);
extern void __fini_section(void);
extern void __fini_section_end(void);
void _start()
{
char *argv[2] = { "./a.out", NULL };
long virtualstart, realstart;
@ -52,8 +50,31 @@ void _start()
struct flat_hdr *header = (struct flat_hdr*) (displacement - 0x40);
Ptr bss = NewPtrClear(header->bss_end - header->data_end);
SysEnvRec env;
long bss_size;
Ptr bss;
env.processor = 0;
__asm__ __volatile__ (
"move.w #2, %%d0\n\t" // versionRequested
"lea %0, %%a0\n\t" // &env
"dc.w 0xa090\n\t" // _SysEnvirons
:
: "m"(env)
: "%a0", "%a1", "%d0", "%d1", "%d2", "memory", "cc"
);
bss_size = header->bss_end - header->data_end;
//Ptr bss = NewPtrClear(bss_size);
__asm__ __volatile__ (
"move.l %1, %%d0\n\t"
"dc.w 0xa31e\n\t" // _NewPtrClear
"move.l %%a0 , %0\n\t"
: "=g"(bss)
: "g"(bss_size)
: "%a0", "%a1", "%d0", "%d1", "%d2", "memory", "cc"
);
long n = header->reloc_count;
long *relocs = (long*)( (char*)header + header->reloc_start );
long i;
@ -74,13 +95,10 @@ void _start()
addrPtr[2] = addr >> 8;
addrPtr[3] = addr;
}
/* {
voidFunction *p;
for(p = __init_array_start; p < __init_array_end; ++p)
(**p)();
}*/
//__init_section();
if(env.processor >= env68040)
{
__asm__ __volatile__ ("dc.w 0xa0bd" : : : "%a0", "%a1", "%d0", "%d1", "%d2", "cc"); // FlushCache();
}
{
char *p = (char*)&__init_section;
char *e = (char*)&__init_section_end;
@ -92,6 +110,9 @@ void _start()
}
}
main(displacement, argv);
{
char *argv[2] = { "./a.out", NULL };
main(1, argv);
}
ExitToShell();
}