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修改实现core hookpoint的bug

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anod 2023-04-03 15:56:02 +08:00
parent bc6874c278
commit 400b9d2e55
1 changed files with 8 additions and 3 deletions
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11
source/arm11/cheat.c
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@ -250,6 +250,10 @@ static int end_of_rom( CodeLocation addr, u32 size )
#define MASK_PC8( m ) (pc[8]&m) #define MASK_PC8( m ) (pc[8]&m)
#define MASK_PC9( m ) (pc[9]&m) #define MASK_PC9( m ) (pc[9]&m)
#define IRQ_HANDLER_POINTER (0x03007ffc) //see gbatek `BIOS Interrupt handling'
#define CORE_HOOKPOINT_RANGE (1<<9)
#define CORE_HOOKPOINT_NEARBY (1<<8)
static int rom_search_hookpoint( CodeLocation addr, int addrlen, CodeLocation hookpoint[MAX_HOOKPOINT] ) static int rom_search_hookpoint( CodeLocation addr, int addrlen, CodeLocation hookpoint[MAX_HOOKPOINT] )
{ {
CodeLocation mark[MAX_HOOKPOINT]; CodeLocation mark[MAX_HOOKPOINT];
@ -258,7 +262,7 @@ static int rom_search_hookpoint( CodeLocation addr, int addrlen, CodeLocation ho
for( int i=0; i < addrlen; ++i ) for( int i=0; i < addrlen; ++i )
{ {
CodeLocation pc = addr + i; CodeLocation pc = addr + i;
if( *pc == 0x03007ffc && mark_idx < MAX_HOOKPOINT ) if( *pc == IRQ_HANDLER_POINTER && mark_idx < MAX_HOOKPOINT )
mark[mark_idx++] = pc; mark[mark_idx++] = pc;
if( MASK_PC0(0XFFFF0FFF) == 0XE3A00301 && if( MASK_PC0(0XFFFF0FFF) == 0XE3A00301 &&
@ -311,18 +315,19 @@ static int rom_search_hookpoint( CodeLocation addr, int addrlen, CodeLocation ho
for( int i=0; i < hookpoint_idx; ++i ) for( int i=0; i < hookpoint_idx; ++i )
{ {
CodeLocation p = hookpoint[i]; CodeLocation p = hookpoint[i];
if( p - addr > (1<<11) ) break; if( p - addr > CORE_HOOKPOINT_RANGE ) break;
for( int j = 0; j < mark_idx; ++j ) for( int j = 0; j < mark_idx; ++j )
{ {
CodeLocation q = mark[j]; CodeLocation q = mark[j];
u32 d = p<q ? q-p : p-q; u32 d = p<q ? q-p : p-q;
if( d < (1<<10) ) if( d < CORE_HOOKPOINT_NEARBY )
{ {
core_hpt = p; core_hpt = p;
break; break;
} }
} }
if( core_hpt != NULL ) break;
} }
if( core_hpt != NULL ) if( core_hpt != NULL )
{ {