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Diffstat (limited to 'm68k_to_x86.c')
-rw-r--r--m68k_to_x86.c73
1 files changed, 58 insertions, 15 deletions
diff --git a/m68k_to_x86.c b/m68k_to_x86.c
index 4a6f7fb..e8bfa4c 100644
--- a/m68k_to_x86.c
+++ b/m68k_to_x86.c
@@ -31,8 +31,6 @@ char disasm_buf[1024];
m68k_context * sync_components(m68k_context * context, uint32_t address);
void handle_cycle_limit();
-void m68k_save_context();
-void m68k_load_context();
void m68k_modified_ret_addr();
void m68k_native_addr();
void m68k_native_addr_and_sync();
@@ -3286,7 +3284,7 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts)
}
break;
case M68K_ILLEGAL:
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
dst = mov_rr(dst, CONTEXT, RDI, SZ_Q);
dst = call(dst, (uint8_t *)print_regs_exit);
break;
@@ -3513,7 +3511,7 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts)
}
break;
case M68K_RESET:
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
dst = mov_rr(dst, CONTEXT, RDI, SZ_Q);
dst = call(dst, (uint8_t *)print_regs_exit);
break;
@@ -4136,14 +4134,14 @@ void insert_breakpoint(m68k_context * context, uint32_t address, uint8_t * bp_ha
dst = bp_stub;
//Save context and call breakpoint handler
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
dst = push_r(dst, SCRATCH1);
dst = mov_rr(dst, CONTEXT, RDI, SZ_Q);
dst = mov_rr(dst, SCRATCH1, RSI, SZ_D);
dst = call(dst, bp_handler);
dst = mov_rr(dst, RAX, CONTEXT, SZ_Q);
//Restore context
- dst = call(dst, (uint8_t *)m68k_load_context);
+ dst = call(dst, opts->load_context);
dst = pop_r(dst, SCRATCH1);
//do prologue stuff
dst = cmp_rr(dst, CYCLES, LIMIT, SZ_D);
@@ -4240,7 +4238,7 @@ uint8_t * gen_mem_fun(x86_68k_options * opts, memmap_chunk * memmap, uint32_t nu
dst = cmp_irdisp8(dst, 0, CONTEXT, offsetof(m68k_context, mem_pointers) + sizeof(void*) * memmap[chunk].ptr_index, SZ_Q);
uint8_t * not_null = dst+1;
dst = jcc(dst, CC_NZ, dst+2);
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
if (is_write) {
//SCRATCH2 is RDI, so no need to move it there
dst = mov_rr(dst, SCRATCH1, RDX, size);
@@ -4265,7 +4263,7 @@ uint8_t * gen_mem_fun(x86_68k_options * opts, memmap_chunk * memmap, uint32_t nu
dst = pop_r(dst, CONTEXT);
dst = mov_rr(dst, RAX, SCRATCH1, size);
}
- dst = jmp(dst, (uint8_t *)m68k_load_context);
+ dst = jmp(dst, opts->load_context);
*not_null = dst - (not_null + 1);
}
@@ -4335,15 +4333,15 @@ uint8_t * gen_mem_fun(x86_68k_options * opts, memmap_chunk * memmap, uint32_t nu
dst = bt_rrdisp32(dst, SCRATCH1, CONTEXT, offsetof(m68k_context, ram_code_flags), SZ_D);
uint8_t * not_code = dst+1;
dst = jcc(dst, CC_NC, dst+2);
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
dst = call(dst, (uint8_t *)m68k_handle_code_write);
dst = mov_rr(dst, RAX, CONTEXT, SZ_Q);
- dst = call(dst, (uint8_t *)m68k_load_context);
+ dst = call(dst, opts->load_context);
*not_code = dst - (not_code+1);
}
dst = retn(dst);
} else if (cfun) {
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
if (is_write) {
//SCRATCH2 is RDI, so no need to move it there
dst = mov_rr(dst, SCRATCH1, RDX, size);
@@ -4368,7 +4366,7 @@ uint8_t * gen_mem_fun(x86_68k_options * opts, memmap_chunk * memmap, uint32_t nu
dst = pop_r(dst, CONTEXT);
dst = mov_rr(dst, RAX, SCRATCH1, size);
}
- dst = jmp(dst, (uint8_t *)m68k_load_context);
+ dst = jmp(dst, opts->load_context);
} else {
//Not sure the best course of action here
if (!is_write) {
@@ -4406,6 +4404,12 @@ void init_x86_68k_opts(x86_68k_options * opts, memmap_chunk * memmap, uint32_t n
opts->aregs[1] = R14;
opts->aregs[2] = R9;
opts->aregs[7] = R15;
+
+ opts->flag_regs[0] = -1;
+ opts->flag_regs[1] = RBX;
+ opts->flag_regs[2] = RDX;
+ opts->flag_regs[3] = BH;
+ opts->flag_regs[4] = DH;
opts->native_code_map = malloc(sizeof(native_map_slot) * NATIVE_MAP_CHUNKS);
memset(opts->native_code_map, 0, sizeof(native_map_slot) * NATIVE_MAP_CHUNKS);
opts->deferred = NULL;
@@ -4415,12 +4419,51 @@ void init_x86_68k_opts(x86_68k_options * opts, memmap_chunk * memmap, uint32_t n
opts->ram_inst_sizes = malloc(sizeof(uint8_t *) * 64);
memset(opts->ram_inst_sizes, 0, sizeof(uint8_t *) * 64);
+ uint8_t * dst = opts->cur_code;
+
+ opts->save_context = dst;
+ for (int i = 0; i < 5; i++)
+ if (opts->flag_regs[i] >= 0) {
+ dst = mov_rrdisp8(dst, opts->flag_regs[i], CONTEXT, offsetof(m68k_context, flags) + i, SZ_B);
+ }
+ for (int i = 0; i < 8; i++)
+ {
+ if (opts->dregs[i] >= 0) {
+ dst = mov_rrdisp8(dst, opts->dregs[i], CONTEXT, offsetof(m68k_context, dregs) + sizeof(uint32_t) * i, SZ_D);
+ }
+ if (opts->aregs[i] >= 0) {
+ dst = mov_rrdisp8(dst, opts->aregs[i], CONTEXT, offsetof(m68k_context, aregs) + sizeof(uint32_t) * i, SZ_D);
+ }
+ }
+ dst = mov_rrdisp8(dst, CYCLES, CONTEXT, offsetof(m68k_context, current_cycle), SZ_D);
+ dst = retn(dst);
+
+ opts->load_context = dst;
+ for (int i = 0; i < 5; i++)
+ if (opts->flag_regs[i] >= 0) {
+ dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, flags) + i, opts->flag_regs[i], SZ_B);
+ }
+ for (int i = 0; i < 8; i++)
+ {
+ if (opts->dregs[i] >= 0) {
+ dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, dregs) + sizeof(uint32_t) * i, opts->dregs[i], SZ_D);
+ }
+ if (opts->aregs[i] >= 0) {
+ dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, aregs) + sizeof(uint32_t) * i, opts->aregs[i], SZ_D);
+ }
+ }
+ dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, current_cycle), CYCLES, SZ_D);
+ dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, target_cycle), LIMIT, SZ_D);
+ dst = retn(dst);
+
+ opts->cur_code = dst;
+
opts->read_16 = gen_mem_fun(opts, memmap, num_chunks, READ_16);
opts->read_8 = gen_mem_fun(opts, memmap, num_chunks, READ_8);
opts->write_16 = gen_mem_fun(opts, memmap, num_chunks, WRITE_16);
opts->write_8 = gen_mem_fun(opts, memmap, num_chunks, WRITE_8);
- uint8_t * dst = opts->cur_code;
+ dst = opts->cur_code;
opts->read_32 = dst;
dst = push_r(dst, SCRATCH1);
@@ -4463,7 +4506,7 @@ void init_x86_68k_opts(x86_68k_options * opts, memmap_chunk * memmap, uint32_t n
dst = cmp_rdisp8r(dst, CONTEXT, offsetof(m68k_context, sync_cycle), CYCLES, SZ_D);
uint8_t * skip_sync = dst+1;
dst = jcc(dst, CC_C, dst+2);
- dst = call(dst, (uint8_t *)m68k_save_context);
+ dst = call(dst, opts->save_context);
dst = mov_rr(dst, CONTEXT, RDI, SZ_Q);
dst = mov_rr(dst, SCRATCH1, RSI, SZ_D);
dst = test_ir(dst, 8, RSP, SZ_D);
@@ -4478,7 +4521,7 @@ void init_x86_68k_opts(x86_68k_options * opts, memmap_chunk * memmap, uint32_t n
dst = add_ir(dst, 8, RSP, SZ_Q);
*no_adjust = dst - (no_adjust+1);
dst = mov_rr(dst, RAX, CONTEXT, SZ_Q);
- dst = jmp(dst, (uint8_t *)m68k_load_context);
+ dst = jmp(dst, opts->load_context);
*skip_sync = dst - (skip_sync+1);
dst = retn(dst);
*do_int = dst - (do_int+1);
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-20 11:33:02 +0000