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修正非标准尺寸rom扩容的bug

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anod 2023-03-17 17:17:29 +08:00
parent 0f21bb6094
commit 77ab4b2309
1 changed files with 54 additions and 27 deletions
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81
source/arm11/cheat.c
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@ -336,44 +336,71 @@ static int cht_calc_needsize( int mode, int numirq )
static CodeLocation rom_fit_newsize( CodeLocation rom, int realend, int totalsize, u32 szrom, u32 *newsize )
{
u32 size = realend + totalsize;
if( size > SIZE_32M )
// get the biggest space that all bytes is 0
CodeLocation found=NULL, current=NULL;
int szfound=0, szcurrent=0;
int reallen = INSTR_LEN( realend );
instruction_t freeinstr = 0; // 0/0xffffffff will be free
#define START_FREE_BLOCK(n) {\
current = rom+i;\
freeinstr = n;\
}
#define END_FREE_BLOCK {\
if( szcurrent > szfound )\
{\
found = current;\
szfound = szcurrent;\
}\
current = NULL;\
szcurrent = 0;\
}
for( int i=0; i < reallen; ++i )
{
// get the biggest space that all bytes is 0
CodeLocation found=NULL, current=NULL;
int szfound=0, szcurrent=0;
int reallen = INSTR_LEN( realend );
for( int i=0; i < reallen; ++i )
if( rom[i] == 0 )
{
if( rom[i] == 0 )
if( szcurrent == 0 )
{
if( szcurrent == 0 ) current = rom+i;
szcurrent += INSTR_SIZE;
START_FREE_BLOCK(0);
}
else if( szcurrent > 0 )
else
{
if( szcurrent > szfound )
{
found = current;
szfound = szcurrent;
}
current = NULL;
szcurrent = 0;
if( freeinstr == 0 )// same block
szcurrent += INSTR_SIZE;
else END_FREE_BLOCK;
}
}
else if( rom[i] == 0xffffffff )
{
if( szcurrent == 0xffffffff )
{
START_FREE_BLOCK(0xffffffff);
}
else
{
if( freeinstr == 0xffffffff )
szcurrent += INSTR_SIZE;
else END_FREE_BLOCK;
}
}
// the zero-filled space is big enough, 3 is a guess value
if( szfound > totalsize * 3 )
{
return found + FIT_SPACE_RESERVED;
}
else return NULL;
else if( szcurrent > 0 ) END_FREE_BLOCK;
}
else if( nextPow2(size) != nextPow2(szrom) )
// the zero-filled space is big enough, 3 is a guess value
if( szfound > totalsize * 3 )
{
// 似乎没什么要动的
*newsize = size + INSTR_SIZE; // reserve a word for padding
return rom + INSTR_LEN( realend );
return found + FIT_SPACE_RESERVED;
}
// cannot find a good block
if( size > SIZE_32M ) return NULL;
// grow cart volumn
else if( szrom < size || nextPow2(size) != nextPow2(szrom) )
*newsize = size + INSTR_SIZE;
return rom + INSTR_LEN( realend );
}