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/* |
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* thunks.cpp - Thunks to share data and code with MacOS |
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* |
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* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#include "sysdeps.h" |
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#include "thunks.h" |
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#include "emul_op.h" |
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#include "cpu_emulation.h" |
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#include "xlowmem.h" |
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|
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// Native function declarations |
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#include "main.h" |
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#include "video.h" |
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#include "name_registry.h" |
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#include "serial.h" |
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#include "ether.h" |
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#include "macos_util.h" |
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|
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// Generate PowerPC thunks for GetResource() replacements? |
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#define POWERPC_GET_RESOURCE_THUNKS 1 |
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|
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|
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/* NativeOp instruction format: |
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+------------+--------------------------+--+----------+------------+ |
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| 6 | |FN| OP | 2 | |
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+------------+--------------------------+--+----------+------------+ |
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0 5 |6 19 20 21 25 26 31 |
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*/ |
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|
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#define POWERPC_NATIVE_OP(LR, OP) \ |
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(POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2) |
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|
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/* |
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* Return the fake PowerPC opcode to handle specified native code |
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*/ |
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|
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#if EMULATED_PPC |
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uint32 NativeOpcode(int selector) |
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{ |
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uint32 opcode; |
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switch (selector) { |
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case NATIVE_DISABLE_INTERRUPT: |
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case NATIVE_ENABLE_INTERRUPT: |
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case NATIVE_CHECK_LOAD_INVOC: |
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opcode = POWERPC_NATIVE_OP(0, selector); |
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break; |
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case NATIVE_PATCH_NAME_REGISTRY: |
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case NATIVE_VIDEO_INSTALL_ACCEL: |
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case NATIVE_VIDEO_VBL: |
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case NATIVE_VIDEO_DO_DRIVER_IO: |
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case NATIVE_ETHER_IRQ: |
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case NATIVE_ETHER_INIT: |
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case NATIVE_ETHER_TERM: |
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case NATIVE_ETHER_OPEN: |
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case NATIVE_ETHER_CLOSE: |
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case NATIVE_ETHER_WPUT: |
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case NATIVE_ETHER_RSRV: |
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case NATIVE_SERIAL_NOTHING: |
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case NATIVE_SERIAL_OPEN: |
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case NATIVE_SERIAL_PRIME_IN: |
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case NATIVE_SERIAL_PRIME_OUT: |
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case NATIVE_SERIAL_CONTROL: |
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case NATIVE_SERIAL_STATUS: |
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case NATIVE_SERIAL_CLOSE: |
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case NATIVE_GET_RESOURCE: |
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case NATIVE_GET_1_RESOURCE: |
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case NATIVE_GET_IND_RESOURCE: |
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case NATIVE_GET_1_IND_RESOURCE: |
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case NATIVE_R_GET_RESOURCE: |
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case NATIVE_MAKE_EXECUTABLE: |
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opcode = POWERPC_NATIVE_OP(1, selector); |
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break; |
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default: |
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abort(); |
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} |
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return opcode; |
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} |
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#endif |
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|
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|
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/* |
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* Generate PowerPC thunks for GetResource() replacements |
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*/ |
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|
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#if EMULATED_PPC |
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static uint32 get_resource_func; |
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static uint32 get_1_resource_func; |
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static uint32 get_ind_resource_func; |
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static uint32 get_1_ind_resource_func; |
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static uint32 r_get_resource_func; |
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|
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static void generate_powerpc_thunks(void) |
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{ |
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static uint32 get_resource_template[] = { |
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PL(0x7c0802a6), // mflr r0 |
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PL(0x90010008), // stw r0,8(r1) |
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PL(0x9421ffbc), // stwu r1,-68(r1) |
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PL(0x90610038), // stw r3,56(r1) |
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PL(0x9081003c), // stw r4,60(r1) |
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PL(0x00000000), // lwz r0,XLM_GET_RESOURCE(r0) |
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PL(0x80402834), // lwz r2,XLM_RES_LIB_TOC(r0) |
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PL(0x7c0903a6), // mtctr r0 |
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PL(0x4e800421), // bctrl |
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PL(0x90610040), // stw r3,64(r1) |
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PL(0x80610038), // lwz r3,56(r1) |
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PL(0xa881003e), // lha r4,62(r1) |
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PL(0x80a10040), // lwz r5,64(r1) |
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PL(0x00000001), // <check_load_invoc> |
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PL(0x80610040), // lwz r3,64(r1) |
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PL(0x8001004c), // lwz r0,76(r1) |
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PL(0x7c0803a6), // mtlr r0 |
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PL(0x38210044), // addi r1,r1,68 |
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PL(0x4e800020) // blr |
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}; |
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const uint32 get_resource_template_size = sizeof(get_resource_template); |
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|
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int xlm_index = -1, check_load_invoc_index = -1; |
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for (int i = 0; i < get_resource_template_size/4; i++) { |
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uint32 opcode = ntohl(get_resource_template[i]); |
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switch (opcode) { |
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case 0x00000000: |
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xlm_index = i; |
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break; |
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case 0x00000001: |
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check_load_invoc_index = i; |
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break; |
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} |
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} |
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assert(xlm_index != -1 && check_load_invoc_index != -1); |
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|
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uint32 check_load_invoc_opcode = NativeOpcode(NATIVE_CHECK_LOAD_INVOC); |
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uintptr base; |
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|
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// GetResource() |
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get_resource_func = base = SheepMem::Reserve(get_resource_template_size); |
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Host2Mac_memcpy(base, get_resource_template, get_resource_template_size); |
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WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_RESOURCE); |
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WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode); |
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|
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// Get1Resource() |
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get_1_resource_func = base = SheepMem::Reserve(get_resource_template_size); |
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Host2Mac_memcpy(base, get_resource_template, get_resource_template_size); |
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WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_RESOURCE); |
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WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode); |
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|
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// GetIndResource() |
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get_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size); |
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Host2Mac_memcpy(base, get_resource_template, get_resource_template_size); |
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WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_IND_RESOURCE); |
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WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode); |
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|
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// Get1IndResource() |
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get_1_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size); |
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Host2Mac_memcpy(base, get_resource_template, get_resource_template_size); |
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WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_IND_RESOURCE); |
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WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode); |
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|
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// RGetResource() |
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r_get_resource_func = base = SheepMem::Reserve(get_resource_template_size); |
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Host2Mac_memcpy(base, get_resource_template, get_resource_template_size); |
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WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_R_GET_RESOURCE); |
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WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode); |
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} |
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#endif |
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|
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|
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/* |
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* Initialize the thunks system |
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*/ |
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|
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struct native_op_t { |
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uint32 tvect; |
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uint32 func; |
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SheepRoutineDescriptor *desc; |
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}; |
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static native_op_t native_op[NATIVE_OP_MAX]; |
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|
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bool ThunksInit(void) |
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{ |
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#if EMULATED_PPC |
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for (int i = 0; i < NATIVE_OP_MAX; i++) { |
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uintptr base = SheepMem::Reserve(12); |
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WriteMacInt32(base + 0, base + 8); |
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WriteMacInt32(base + 4, 0); // Fake TVECT |
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WriteMacInt32(base + 8, NativeOpcode(i)); |
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native_op[i].tvect = base; |
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native_op[i].func = base + 8; |
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} |
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#if POWERPC_GET_RESOURCE_THUNKS |
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generate_powerpc_thunks(); |
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native_op[NATIVE_GET_RESOURCE].func = get_resource_func; |
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native_op[NATIVE_GET_1_RESOURCE].func = get_1_resource_func; |
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native_op[NATIVE_GET_IND_RESOURCE].func = get_ind_resource_func; |
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native_op[NATIVE_GET_1_IND_RESOURCE].func = get_1_ind_resource_func; |
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native_op[NATIVE_R_GET_RESOURCE].func = r_get_resource_func; |
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#endif |
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#else |
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#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) |
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#define DEFINE_NATIVE_OP(ID, FUNC) do { \ |
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uintptr base = SheepMem::Reserve(8); \ |
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WriteMacInt32(base + 0, (uint32)FUNC); \ |
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WriteMacInt32(base + 4, 0); /*Fake TVECT*/ \ |
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native_op[ID].tvect = base; \ |
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native_op[ID].func = (uint32)FUNC; \ |
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} while (0) |
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#elif defined(__BEOS__) |
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#define DEFINE_NATIVE_OP(ID, FUNC) do { \ |
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native_op[ID].tvect = FUNC; \ |
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native_op[ID].func = ((uint32 *)FUNC)[0]; \ |
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} while (0) |
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#else |
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#error "FIXME: define NativeOp for your platform" |
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#endif |
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// FIXME: add GetResource() and friends for completeness |
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DEFINE_NATIVE_OP(NATIVE_PATCH_NAME_REGISTRY, DoPatchNameRegistry); |
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DEFINE_NATIVE_OP(NATIVE_VIDEO_INSTALL_ACCEL, VideoInstallAccel); |
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DEFINE_NATIVE_OP(NATIVE_VIDEO_VBL, VideoVBL); |
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DEFINE_NATIVE_OP(NATIVE_VIDEO_DO_DRIVER_IO, VideoDoDriverIO); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_IRQ, EtherIRQ); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_INIT, InitStreamModule); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_TERM, TerminateStreamModule); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_OPEN, ether_open); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_CLOSE, ether_close); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_WPUT, ether_wput); |
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DEFINE_NATIVE_OP(NATIVE_ETHER_RSRV, ether_rsrv); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_NOTHING, SerialNothing); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_OPEN, SerialOpen); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_IN, SerialPrimeIn); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_OUT, SerialPrimeOut); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_CONTROL, SerialControl); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus); |
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DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose); |
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DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable); |
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#undef DEFINE_NATIVE_OP |
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#endif |
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|
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// Initialize routine descriptors (if TVECT exists) |
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for (int i = 0; i < NATIVE_OP_MAX; i++) { |
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uint32 tvect = native_op[i].tvect; |
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if (tvect) |
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native_op[i].desc = new SheepRoutineDescriptor(0, tvect); |
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} |
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|
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return true; |
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} |
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|
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|
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/* |
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* Delete generated thunks |
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*/ |
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|
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void ThunksExit(void) |
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{ |
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for (int i = 0; i < NATIVE_OP_MAX; i++) { |
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SheepRoutineDescriptor *desc = native_op[i].desc; |
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if (desc) |
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delete desc; |
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} |
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} |
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|
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|
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/* |
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* Return the native function descriptor (TVECT) |
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*/ |
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|
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uint32 NativeTVECT(int selector) |
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{ |
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assert(selector < NATIVE_OP_MAX); |
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const uint32 tvect = native_op[selector].tvect; |
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assert(tvect != 0); |
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return tvect; |
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} |
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|
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|
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/* |
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* Return the native function address |
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*/ |
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|
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uint32 NativeFunction(int selector) |
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{ |
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assert(selector < NATIVE_OP_MAX); |
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const uint32 func = native_op[selector].func; |
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assert(func != 0); |
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return func; |
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} |
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|
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|
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/* |
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* Return the routine descriptor address of the native function |
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*/ |
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|
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uint32 NativeRoutineDescriptor(int selector) |
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{ |
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assert(selector < NATIVE_OP_MAX); |
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SheepRoutineDescriptor * const desc = native_op[selector].desc; |
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assert(desc != 0); |
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return desc->addr(); |
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} |
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|
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|
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/* |
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* Execute native code from EMUL_OP routine (real mode switch) |
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*/ |
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|
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void ExecuteNative(int selector) |
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{ |
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M68kRegisters r; |
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Execute68k(NativeRoutineDescriptor(selector), &r); |
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} |
