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[Loader] Modified to loader to use "long jumps" to our code.

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This commit is contained in:
Maschell 2018-04-04 14:26:43 +02:00
parent 87cf494cbf
commit 2c311aea66
2 changed files with 18 additions and 3 deletions
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19
loader/src/patcher/function_patcher.cpp
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@ -109,7 +109,7 @@ void new_PatchInvidualMethodHooks(replacement_data_plugin_t * plugin_data) {
u32 skip_instr = 1;
u32 my_instr_len = 6;
u32 instr_len = my_instr_len + skip_instr;
u32 instr_len = my_instr_len + skip_instr + 6;
u32 flush_len = 4*instr_len;
for(s32 i = 0; i < method_hooks_count; i++) {
replacement_data_function_t * function_data = &plugin_data->functions[i];
@ -194,11 +194,26 @@ void new_PatchInvidualMethodHooks(replacement_data_plugin_t * plugin_data) {
space++;
*space = 0x4E800420; // bctr
space++;
u32 repl_addr_test = (u32) space;
*space = 0x9061FFE0;
space++;
*space = 0x3C600000 | (((repl_addr) >> 16) & 0x0000FFFF); // lis r3, repl_addr@h
space++;
*space = 0x60630000 | ((repl_addr) & 0x0000ffff); // ori r3, r3, repl_addr@l
space++;
*space = 0x7C6903A6; // mtctr r3
space++;
*space = 0x8061FFE0; // lwz r3,-32(r1)
space++;
*space = 0x4E800420; // bctr
space++;
DCFlushRange((void*)(space - instr_len), flush_len);
ICInvalidateRange((unsigned char*)(space - instr_len), flush_len);
//setting jump back
u32 replace_instr = 0x48000002 | (repl_addr & 0x03fffffc);
u32 replace_instr = 0x48000002 | (repl_addr_test & 0x03fffffc);
ICInvalidateRange(&replace_instr, 4);
DCFlushRange(&replace_instr, 4);

2
loader/src/patcher/function_patcher.h
View File

@ -34,7 +34,7 @@ struct rpl_handling {
#define STATIC_FUNCTION 0
#define DYNAMIC_FUNCTION 1
#define FUNCTION_PATCHER_METHOD_STORE_SIZE 7
#define FUNCTION_PATCHER_METHOD_STORE_SIZE 13
#define MAXIMUM_PLUGIN_PATH_NAME_LENGTH 256
#define MAXIMUM_PLUGIN_NAME_LENGTH 51
#define MAXIMUM_FUNCTION_NAME_LENGTH 61