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Diffstat (limited to 'hw/xfree86/x86emu/decode.c')
-rw-r--r--hw/xfree86/x86emu/decode.c1068
1 files changed, 534 insertions, 534 deletions
diff --git a/hw/xfree86/x86emu/decode.c b/hw/xfree86/x86emu/decode.c
index 9339f4c7f..12f8fb84b 100644
--- a/hw/xfree86/x86emu/decode.c
+++ b/hw/xfree86/x86emu/decode.c
@@ -46,25 +46,27 @@
REMARKS:
Handles any pending asychronous interrupts.
****************************************************************************/
-static void x86emu_intr_handle(void)
+static void
+x86emu_intr_handle(void)
{
- u8 intno;
-
- if (M.x86.intr & INTR_SYNCH) {
- intno = M.x86.intno;
- if (_X86EMU_intrTab[intno]) {
- (*_X86EMU_intrTab[intno])(intno);
- } else {
- push_word((u16)M.x86.R_FLG);
- CLEAR_FLAG(F_IF);
- CLEAR_FLAG(F_TF);
- push_word(M.x86.R_CS);
- M.x86.R_CS = mem_access_word(intno * 4 + 2);
- push_word(M.x86.R_IP);
- M.x86.R_IP = mem_access_word(intno * 4);
- M.x86.intr = 0;
- }
- }
+ u8 intno;
+
+ if (M.x86.intr & INTR_SYNCH) {
+ intno = M.x86.intno;
+ if (_X86EMU_intrTab[intno]) {
+ (*_X86EMU_intrTab[intno]) (intno);
+ }
+ else {
+ push_word((u16) M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(intno * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(intno * 4);
+ M.x86.intr = 0;
+ }
+ }
}
/****************************************************************************
@@ -75,11 +77,11 @@ REMARKS:
Raise the specified interrupt to be handled before the execution of the
next instruction.
****************************************************************************/
-void x86emu_intr_raise(
- u8 intrnum)
+void
+x86emu_intr_raise(u8 intrnum)
{
- M.x86.intno = intrnum;
- M.x86.intr |= INTR_SYNCH;
+ M.x86.intno = intrnum;
+ M.x86.intr |= INTR_SYNCH;
}
/****************************************************************************
@@ -88,38 +90,39 @@ Main execution loop for the emulator. We return from here when the system
halts, which is normally caused by a stack fault when we return from the
original real mode call.
****************************************************************************/
-void X86EMU_exec(void)
+void
+X86EMU_exec(void)
{
- u8 op1;
-
- M.x86.intr = 0;
- DB(x86emu_end_instr();)
-
- for (;;) {
-DB( if (CHECK_IP_FETCH())
- x86emu_check_ip_access();)
- /* If debugging, save the IP and CS values. */
- SAVE_IP_CS(M.x86.R_CS, M.x86.R_IP);
- INC_DECODED_INST_LEN(1);
- if (M.x86.intr) {
- if (M.x86.intr & INTR_HALTED) {
-DB( if (M.x86.R_SP != 0) {
- printk("halted\n");
- X86EMU_trace_regs();
- }
- else {
- if (M.x86.debug)
- printk("Service completed successfully\n");
- })
- return;
+ u8 op1;
+
+ M.x86.intr = 0;
+ DB(x86emu_end_instr();
+ )
+
+ for (;;) {
+ DB(if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ /* If debugging, save the IP and CS values. */
+ SAVE_IP_CS(M.x86.R_CS, M.x86.R_IP);
+ INC_DECODED_INST_LEN(1);
+ if (M.x86.intr) {
+ if (M.x86.intr & INTR_HALTED) {
+ DB(if (M.x86.R_SP != 0) {
+ printk("halted\n"); X86EMU_trace_regs();}
+ else {
+ if (M.x86.debug)
+ printk("Service completed successfully\n");}
+ )
+ return;
}
- if (((M.x86.intr & INTR_SYNCH) && (M.x86.intno == 0 || M.x86.intno == 2)) ||
- !ACCESS_FLAG(F_IF)) {
- x86emu_intr_handle();
- }
- }
- op1 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
- (*x86emu_optab[op1])(op1);
+ if (((M.x86.intr & INTR_SYNCH) &&
+ (M.x86.intno == 0 || M.x86.intno == 2)) ||
+ !ACCESS_FLAG(F_IF)) {
+ x86emu_intr_handle();
+ }
+ }
+ op1 = (*sys_rdb) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP++));
+ (*x86emu_optab[op1]) (op1);
if (M.x86.debug & DEBUG_EXIT) {
M.x86.debug &= ~DEBUG_EXIT;
return;
@@ -131,9 +134,10 @@ DB( if (M.x86.R_SP != 0) {
REMARKS:
Halts the system by setting the halted system flag.
****************************************************************************/
-void X86EMU_halt_sys(void)
+void
+X86EMU_halt_sys(void)
{
- M.x86.intr |= INTR_HALTED;
+ M.x86.intr |= INTR_HALTED;
}
/****************************************************************************
@@ -148,19 +152,17 @@ next instruction.
NOTE: Do not inline this function, as (*sys_rdb) is already inline!
****************************************************************************/
-void fetch_decode_modrm(
- int *mod,
- int *regh,
- int *regl)
+void
+fetch_decode_modrm(int *mod, int *regh, int *regl)
{
- int fetched;
-
-DB( if (CHECK_IP_FETCH())
- x86emu_check_ip_access();)
- fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
- INC_DECODED_INST_LEN(1);
- *mod = (fetched >> 6) & 0x03;
- *regh = (fetched >> 3) & 0x07;
+ int fetched;
+
+ DB(if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdb) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ *mod = (fetched >> 6) & 0x03;
+ *regh = (fetched >> 3) & 0x07;
*regl = (fetched >> 0) & 0x07;
}
@@ -174,15 +176,16 @@ moves the instruction pointer to the next value.
NOTE: Do not inline this function, as (*sys_rdb) is already inline!
****************************************************************************/
-u8 fetch_byte_imm(void)
+u8
+fetch_byte_imm(void)
{
- u8 fetched;
+ u8 fetched;
-DB( if (CHECK_IP_FETCH())
- x86emu_check_ip_access();)
- fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
- INC_DECODED_INST_LEN(1);
- return fetched;
+ DB(if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdb) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ return fetched;
}
/****************************************************************************
@@ -195,16 +198,17 @@ moves the instruction pointer to the next value.
NOTE: Do not inline this function, as (*sys_rdw) is already inline!
****************************************************************************/
-u16 fetch_word_imm(void)
+u16
+fetch_word_imm(void)
{
- u16 fetched;
-
-DB( if (CHECK_IP_FETCH())
- x86emu_check_ip_access();)
- fetched = (*sys_rdw)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
- M.x86.R_IP += 2;
- INC_DECODED_INST_LEN(2);
- return fetched;
+ u16 fetched;
+
+ DB(if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdw) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP));
+ M.x86.R_IP += 2;
+ INC_DECODED_INST_LEN(2);
+ return fetched;
}
/****************************************************************************
@@ -217,16 +221,17 @@ moves the instruction pointer to the next value.
NOTE: Do not inline this function, as (*sys_rdw) is already inline!
****************************************************************************/
-u32 fetch_long_imm(void)
+u32
+fetch_long_imm(void)
{
- u32 fetched;
-
-DB( if (CHECK_IP_FETCH())
- x86emu_check_ip_access();)
- fetched = (*sys_rdl)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
- M.x86.R_IP += 4;
- INC_DECODED_INST_LEN(4);
- return fetched;
+ u32 fetched;
+
+ DB(if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdl) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP));
+ M.x86.R_IP += 4;
+ INC_DECODED_INST_LEN(4);
+ return fetched;
}
/****************************************************************************
@@ -258,38 +263,39 @@ cpu-state-varible M.x86.mode. There are several potential states:
Each of the above 7 items are handled with a bit in the mode field.
****************************************************************************/
-_INLINE u32 get_data_segment(void)
+_INLINE u32
+get_data_segment(void)
{
#define GET_SEGMENT(segment)
- switch (M.x86.mode & SYSMODE_SEGMASK) {
- case 0: /* default case: use ds register */
- case SYSMODE_SEGOVR_DS:
- case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS:
- return M.x86.R_DS;
- case SYSMODE_SEG_DS_SS: /* non-overridden, use ss register */
- return M.x86.R_SS;
- case SYSMODE_SEGOVR_CS:
- case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS:
- return M.x86.R_CS;
- case SYSMODE_SEGOVR_ES:
- case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS:
- return M.x86.R_ES;
- case SYSMODE_SEGOVR_FS:
- case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS:
- return M.x86.R_FS;
- case SYSMODE_SEGOVR_GS:
- case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS:
- return M.x86.R_GS;
- case SYSMODE_SEGOVR_SS:
- case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS:
- return M.x86.R_SS;
- default:
+ switch (M.x86.mode & SYSMODE_SEGMASK) {
+ case 0: /* default case: use ds register */
+ case SYSMODE_SEGOVR_DS:
+ case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_DS;
+ case SYSMODE_SEG_DS_SS: /* non-overridden, use ss register */
+ return M.x86.R_SS;
+ case SYSMODE_SEGOVR_CS:
+ case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_CS;
+ case SYSMODE_SEGOVR_ES:
+ case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS:
+ return M.x86.R_ES;
+ case SYSMODE_SEGOVR_FS:
+ case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_FS;
+ case SYSMODE_SEGOVR_GS:
+ case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_GS;
+ case SYSMODE_SEGOVR_SS:
+ case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_SS;
+ default:
#ifdef DEBUG
- printk("error: should not happen: multiple overrides.\n");
+ printk("error: should not happen: multiple overrides.\n");
#endif
- HALT_SYS();
- return 0;
- }
+ HALT_SYS();
+ return 0;
+ }
}
/****************************************************************************
@@ -301,14 +307,14 @@ Byte value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u8 fetch_data_byte(
- uint offset)
+u8
+fetch_data_byte(uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- return (*sys_rdb)((get_data_segment() << 4) + offset);
+ return (*sys_rdb) ((get_data_segment() << 4) + offset);
}
/****************************************************************************
@@ -320,14 +326,14 @@ Word value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u16 fetch_data_word(
- uint offset)
+u16
+fetch_data_word(uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- return (*sys_rdw)((get_data_segment() << 4) + offset);
+ return (*sys_rdw) ((get_data_segment() << 4) + offset);
}
/****************************************************************************
@@ -339,14 +345,14 @@ Long value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u32 fetch_data_long(
- uint offset)
+u32
+fetch_data_long(uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- return (*sys_rdl)((get_data_segment() << 4) + offset);
+ return (*sys_rdl) ((get_data_segment() << 4) + offset);
}
/****************************************************************************
@@ -359,15 +365,14 @@ Byte value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u8 fetch_data_byte_abs(
- uint segment,
- uint offset)
+u8
+fetch_data_byte_abs(uint segment, uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- return (*sys_rdb)(((u32)segment << 4) + offset);
+ return (*sys_rdb) (((u32) segment << 4) + offset);
}
/****************************************************************************
@@ -380,15 +385,14 @@ Word value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u16 fetch_data_word_abs(
- uint segment,
- uint offset)
+u16
+fetch_data_word_abs(uint segment, uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- return (*sys_rdw)(((u32)segment << 4) + offset);
+ return (*sys_rdw) (((u32) segment << 4) + offset);
}
/****************************************************************************
@@ -401,15 +405,14 @@ Long value read from the absolute memory location.
NOTE: Do not inline this function as (*sys_rdX) is already inline!
****************************************************************************/
-u32 fetch_data_long_abs(
- uint segment,
- uint offset)
+u32
+fetch_data_long_abs(uint segment, uint offset)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- return (*sys_rdl)(((u32)segment << 4) + offset);
+ return (*sys_rdl) (((u32) segment << 4) + offset);
}
/****************************************************************************
@@ -423,15 +426,14 @@ the current 'default' segment, which may have been overridden.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_byte(
- uint offset,
- u8 val)
+void
+store_data_byte(uint offset, u8 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- (*sys_wrb)((get_data_segment() << 4) + offset, val);
+ (*sys_wrb) ((get_data_segment() << 4) + offset, val);
}
/****************************************************************************
@@ -445,15 +447,14 @@ the current 'default' segment, which may have been overridden.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_word(
- uint offset,
- u16 val)
+void
+store_data_word(uint offset, u16 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- (*sys_wrw)((get_data_segment() << 4) + offset, val);
+ (*sys_wrw) ((get_data_segment() << 4) + offset, val);
}
/****************************************************************************
@@ -467,15 +468,14 @@ the current 'default' segment, which may have been overridden.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_long(
- uint offset,
- u32 val)
+void
+store_data_long(uint offset, u32 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access((u16)get_data_segment(), offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16) get_data_segment(), offset);
#endif
- (*sys_wrl)((get_data_segment() << 4) + offset, val);
+ (*sys_wrl) ((get_data_segment() << 4) + offset, val);
}
/****************************************************************************
@@ -489,16 +489,14 @@ Writes a byte value to an absolute memory location.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_byte_abs(
- uint segment,
- uint offset,
- u8 val)
+void
+store_data_byte_abs(uint segment, uint offset, u8 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- (*sys_wrb)(((u32)segment << 4) + offset, val);
+ (*sys_wrb) (((u32) segment << 4) + offset, val);
}
/****************************************************************************
@@ -512,16 +510,14 @@ Writes a word value to an absolute memory location.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_word_abs(
- uint segment,
- uint offset,
- u16 val)
+void
+store_data_word_abs(uint segment, uint offset, u16 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- (*sys_wrw)(((u32)segment << 4) + offset, val);
+ (*sys_wrw) (((u32) segment << 4) + offset, val);
}
/****************************************************************************
@@ -535,16 +531,14 @@ Writes a long value to an absolute memory location.
NOTE: Do not inline this function as (*sys_wrX) is already inline!
****************************************************************************/
-void store_data_long_abs(
- uint segment,
- uint offset,
- u32 val)
+void
+store_data_long_abs(uint segment, uint offset, u32 val)
{
#ifdef DEBUG
- if (CHECK_DATA_ACCESS())
- x86emu_check_data_access(segment, offset);
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
#endif
- (*sys_wrl)(((u32)segment << 4) + offset, val);
+ (*sys_wrl) (((u32) segment << 4) + offset, val);
}
/****************************************************************************
@@ -558,37 +552,37 @@ REMARKS:
Return a pointer to the register given by the R/RM field of the
modrm byte, for byte operands. Also enables the decoding of instructions.
****************************************************************************/
-u8* decode_rm_byte_register(
- int reg)
+u8 *
+decode_rm_byte_register(int reg)
{
- switch (reg) {
- case 0:
- DECODE_PRINTF("AL");
- return &M.x86.R_AL;
- case 1:
- DECODE_PRINTF("CL");
- return &M.x86.R_CL;
- case 2:
- DECODE_PRINTF("DL");
- return &M.x86.R_DL;
- case 3:
- DECODE_PRINTF("BL");
- return &M.x86.R_BL;
- case 4:
- DECODE_PRINTF("AH");
- return &M.x86.R_AH;
- case 5:
- DECODE_PRINTF("CH");
- return &M.x86.R_CH;
- case 6:
- DECODE_PRINTF("DH");
- return &M.x86.R_DH;
- case 7:
- DECODE_PRINTF("BH");
- return &M.x86.R_BH;
- }
- HALT_SYS();
- return NULL; /* NOT REACHED OR REACHED ON ERROR */
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("AL");
+ return &M.x86.R_AL;
+ case 1:
+ DECODE_PRINTF("CL");
+ return &M.x86.R_CL;
+ case 2:
+ DECODE_PRINTF("DL");
+ return &M.x86.R_DL;
+ case 3:
+ DECODE_PRINTF("BL");
+ return &M.x86.R_BL;
+ case 4:
+ DECODE_PRINTF("AH");
+ return &M.x86.R_AH;
+ case 5:
+ DECODE_PRINTF("CH");
+ return &M.x86.R_CH;
+ case 6:
+ DECODE_PRINTF("DH");
+ return &M.x86.R_DH;
+ case 7:
+ DECODE_PRINTF("BH");
+ return &M.x86.R_BH;
+ }
+ HALT_SYS();
+ return NULL; /* NOT REACHED OR REACHED ON ERROR */
}
/****************************************************************************
@@ -602,36 +596,36 @@ REMARKS:
Return a pointer to the register given by the R/RM field of the
modrm byte, for word operands. Also enables the decoding of instructions.
****************************************************************************/
-u16* decode_rm_word_register(
- int reg)
+u16 *
+decode_rm_word_register(int reg)
{
- switch (reg) {
- case 0:
- DECODE_PRINTF("AX");
- return &M.x86.R_AX;
- case 1:
- DECODE_PRINTF("CX");
- return &M.x86.R_CX;
- case 2:
- DECODE_PRINTF("DX");
- return &M.x86.R_DX;
- case 3:
- DECODE_PRINTF("BX");
- return &M.x86.R_BX;
- case 4:
- DECODE_PRINTF("SP");
- return &M.x86.R_SP;
- case 5:
- DECODE_PRINTF("BP");
- return &M.x86.R_BP;
- case 6:
- DECODE_PRINTF("SI");
- return &M.x86.R_SI;
- case 7:
- DECODE_PRINTF("DI");
- return &M.x86.R_DI;
- }
- HALT_SYS();
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("AX");
+ return &M.x86.R_AX;
+ case 1:
+ DECODE_PRINTF("CX");
+ return &M.x86.R_CX;
+ case 2:
+ DECODE_PRINTF("DX");
+ return &M.x86.R_DX;
+ case 3:
+ DECODE_PRINTF("BX");
+ return &M.x86.R_BX;
+ case 4:
+ DECODE_PRINTF("SP");
+ return &M.x86.R_SP;
+ case 5:
+ DECODE_PRINTF("BP");
+ return &M.x86.R_BP;
+ case 6:
+ DECODE_PRINTF("SI");
+ return &M.x86.R_SI;
+ case 7:
+ DECODE_PRINTF("DI");
+ return &M.x86.R_DI;
+ }
+ HALT_SYS();
return NULL; /* NOTREACHED OR REACHED ON ERROR */
}
@@ -646,36 +640,36 @@ REMARKS:
Return a pointer to the register given by the R/RM field of the
modrm byte, for dword operands. Also enables the decoding of instructions.
****************************************************************************/
-u32* decode_rm_long_register(
- int reg)
+u32 *
+decode_rm_long_register(int reg)
{
switch (reg) {
- case 0:
- DECODE_PRINTF("EAX");
- return &M.x86.R_EAX;
- case 1:
- DECODE_PRINTF("ECX");
- return &M.x86.R_ECX;
- case 2:
- DECODE_PRINTF("EDX");
- return &M.x86.R_EDX;
- case 3:
- DECODE_PRINTF("EBX");
- return &M.x86.R_EBX;
- case 4:
- DECODE_PRINTF("ESP");
- return &M.x86.R_ESP;
- case 5:
- DECODE_PRINTF("EBP");
- return &M.x86.R_EBP;
- case 6:
- DECODE_PRINTF("ESI");
- return &M.x86.R_ESI;
- case 7:
- DECODE_PRINTF("EDI");
- return &M.x86.R_EDI;
- }
- HALT_SYS();
+ case 0:
+ DECODE_PRINTF("EAX");
+ return &M.x86.R_EAX;
+ case 1:
+ DECODE_PRINTF("ECX");
+ return &M.x86.R_ECX;
+ case 2:
+ DECODE_PRINTF("EDX");
+ return &M.x86.R_EDX;
+ case 3:
+ DECODE_PRINTF("EBX");
+ return &M.x86.R_EBX;
+ case 4:
+ DECODE_PRINTF("ESP");
+ return &M.x86.R_ESP;
+ case 5:
+ DECODE_PRINTF("EBP");
+ return &M.x86.R_EBP;
+ case 6:
+ DECODE_PRINTF("ESI");
+ return &M.x86.R_ESI;
+ case 7:
+ DECODE_PRINTF("EDI");
+ return &M.x86.R_EDI;
+ }
+ HALT_SYS();
return NULL; /* NOTREACHED OR REACHED ON ERROR */
}
@@ -691,126 +685,129 @@ Return a pointer to the register given by the R/RM field of the
modrm byte, for word operands, modified from above for the weirdo
special case of segreg operands. Also enables the decoding of instructions.
****************************************************************************/
-u16* decode_rm_seg_register(
- int reg)
+u16 *
+decode_rm_seg_register(int reg)
{
- switch (reg) {
- case 0:
- DECODE_PRINTF("ES");
- return &M.x86.R_ES;
- case 1:
- DECODE_PRINTF("CS");
- return &M.x86.R_CS;
- case 2:
- DECODE_PRINTF("SS");
- return &M.x86.R_SS;
- case 3:
- DECODE_PRINTF("DS");
- return &M.x86.R_DS;
- case 4:
- DECODE_PRINTF("FS");
- return &M.x86.R_FS;
- case 5:
- DECODE_PRINTF("GS");
- return &M.x86.R_GS;
- case 6:
- case 7:
- DECODE_PRINTF("ILLEGAL SEGREG");
- break;
- }
- HALT_SYS();
- return NULL; /* NOT REACHED OR REACHED ON ERROR */
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("ES");
+ return &M.x86.R_ES;
+ case 1:
+ DECODE_PRINTF("CS");
+ return &M.x86.R_CS;
+ case 2:
+ DECODE_PRINTF("SS");
+ return &M.x86.R_SS;
+ case 3:
+ DECODE_PRINTF("DS");
+ return &M.x86.R_DS;
+ case 4:
+ DECODE_PRINTF("FS");
+ return &M.x86.R_FS;
+ case 5:
+ DECODE_PRINTF("GS");
+ return &M.x86.R_GS;
+ case 6:
+ case 7:
+ DECODE_PRINTF("ILLEGAL SEGREG");
+ break;
+ }
+ HALT_SYS();
+ return NULL; /* NOT REACHED OR REACHED ON ERROR */
}
/*
*
* return offset from the SIB Byte
*/
-u32 decode_sib_address(int sib, int mod)
+u32
+decode_sib_address(int sib, int mod)
{
u32 base = 0, i = 0, scale = 1;
- switch(sib & 0x07) {
+ switch (sib & 0x07) {
case 0:
- DECODE_PRINTF("[EAX]");
- base = M.x86.R_EAX;
- break;
+ DECODE_PRINTF("[EAX]");
+ base = M.x86.R_EAX;
+ break;
case 1:
- DECODE_PRINTF("[ECX]");
- base = M.x86.R_ECX;
- break;
+ DECODE_PRINTF("[ECX]");
+ base = M.x86.R_ECX;
+ break;
case 2:
- DECODE_PRINTF("[EDX]");
- base = M.x86.R_EDX;
- break;
+ DECODE_PRINTF("[EDX]");
+ base = M.x86.R_EDX;
+ break;
case 3:
- DECODE_PRINTF("[EBX]");
- base = M.x86.R_EBX;
- break;
+ DECODE_PRINTF("[EBX]");
+ base = M.x86.R_EBX;
+ break;
case 4:
- DECODE_PRINTF("[ESP]");
- base = M.x86.R_ESP;
- M.x86.mode |= SYSMODE_SEG_DS_SS;
- break;
+ DECODE_PRINTF("[ESP]");
+ base = M.x86.R_ESP;
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ break;
case 5:
- if (mod == 0) {
- base = fetch_long_imm();
- DECODE_PRINTF2("%08x", base);
- } else {
- DECODE_PRINTF("[EBP]");
- base = M.x86.R_ESP;
- M.x86.mode |= SYSMODE_SEG_DS_SS;
- }
- break;
+ if (mod == 0) {
+ base = fetch_long_imm();
+ DECODE_PRINTF2("%08x", base);
+ }
+ else {
+ DECODE_PRINTF("[EBP]");
+ base = M.x86.R_ESP;
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ }
+ break;
case 6:
- DECODE_PRINTF("[ESI]");
- base = M.x86.R_ESI;
- break;
+ DECODE_PRINTF("[ESI]");
+ base = M.x86.R_ESI;
+ break;
case 7:
- DECODE_PRINTF("[EDI]");
- base = M.x86.R_EDI;
- break;
+ DECODE_PRINTF("[EDI]");
+ base = M.x86.R_EDI;
+ break;
}
switch ((sib >> 3) & 0x07) {
case 0:
- DECODE_PRINTF("[EAX");
- i = M.x86.R_EAX;
- break;
+ DECODE_PRINTF("[EAX");
+ i = M.x86.R_EAX;
+ break;
case 1:
- DECODE_PRINTF("[ECX");
- i = M.x86.R_ECX;
- break;
+ DECODE_PRINTF("[ECX");
+ i = M.x86.R_ECX;
+ break;
case 2:
- DECODE_PRINTF("[EDX");
- i = M.x86.R_EDX;
- break;
+ DECODE_PRINTF("[EDX");
+ i = M.x86.R_EDX;
+ break;
case 3:
- DECODE_PRINTF("[EBX");
- i = M.x86.R_EBX;
- break;
+ DECODE_PRINTF("[EBX");
+ i = M.x86.R_EBX;
+ break;
case 4:
- i = 0;
- break;
+ i = 0;
+ break;
case 5:
- DECODE_PRINTF("[EBP");
- i = M.x86.R_EBP;
- break;
+ DECODE_PRINTF("[EBP");
+ i = M.x86.R_EBP;
+ break;
case 6:
- DECODE_PRINTF("[ESI");
- i = M.x86.R_ESI;
- break;
+ DECODE_PRINTF("[ESI");
+ i = M.x86.R_ESI;
+ break;
case 7:
- DECODE_PRINTF("[EDI");
- i = M.x86.R_EDI;
- break;
+ DECODE_PRINTF("[EDI");
+ i = M.x86.R_EDI;
+ break;
}
scale = 1 << ((sib >> 6) & 0x03);
if (((sib >> 3) & 0x07) != 4) {
- if (scale == 1) {
- DECODE_PRINTF("]");
- } else {
- DECODE_PRINTF2("*%d]", scale);
- }
+ if (scale == 1) {
+ DECODE_PRINTF("]");
+ }
+ else {
+ DECODE_PRINTF2("*%d]", scale);
+ }
}
return base + (i * scale);
}
@@ -835,74 +832,75 @@ NOTE: The code which specifies the corresponding segment (ds vs ss)
if a SS access is needed, set this bit. Otherwise, DS access
occurs (unless any of the segment override bits are set).
****************************************************************************/
-u32 decode_rm00_address(
- int rm)
+u32
+decode_rm00_address(int rm)
{
u32 offset;
int sib;
if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
/* 32-bit addressing */
- switch (rm) {
- case 0:
- DECODE_PRINTF("[EAX]");
- return M.x86.R_EAX;
- case 1:
- DECODE_PRINTF("[ECX]");
- return M.x86.R_ECX;
- case 2:
- DECODE_PRINTF("[EDX]");
- return M.x86.R_EDX;
- case 3:
- DECODE_PRINTF("[EBX]");
- return M.x86.R_EBX;
- case 4:
- sib = fetch_byte_imm();
- return decode_sib_address(sib, 0);
- case 5:
- offset = fetch_long_imm();
- DECODE_PRINTF2("[%08x]", offset);
- return offset;
- case 6:
- DECODE_PRINTF("[ESI]");
- return M.x86.R_ESI;
- case 7:
- DECODE_PRINTF("[EDI]");
- return M.x86.R_EDI;
- }
- HALT_SYS();
- } else {
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF("[EAX]");
+ return M.x86.R_EAX;
+ case 1:
+ DECODE_PRINTF("[ECX]");
+ return M.x86.R_ECX;
+ case 2:
+ DECODE_PRINTF("[EDX]");
+ return M.x86.R_EDX;
+ case 3:
+ DECODE_PRINTF("[EBX]");
+ return M.x86.R_EBX;
+ case 4:
+ sib = fetch_byte_imm();
+ return decode_sib_address(sib, 0);
+ case 5:
+ offset = fetch_long_imm();
+ DECODE_PRINTF2("[%08x]", offset);
+ return offset;
+ case 6:
+ DECODE_PRINTF("[ESI]");
+ return M.x86.R_ESI;
+ case 7:
+ DECODE_PRINTF("[EDI]");
+ return M.x86.R_EDI;
+ }
+ HALT_SYS();
+ }
+ else {
/* 16-bit addressing */
- switch (rm) {
- case 0:
- DECODE_PRINTF("[BX+SI]");
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF("[BX+SI]");
return (M.x86.R_BX + M.x86.R_SI) & 0xffff;
- case 1:
- DECODE_PRINTF("[BX+DI]");
+ case 1:
+ DECODE_PRINTF("[BX+DI]");
return (M.x86.R_BX + M.x86.R_DI) & 0xffff;
- case 2:
- DECODE_PRINTF("[BP+SI]");
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 2:
+ DECODE_PRINTF("[BP+SI]");
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_SI) & 0xffff;
- case 3:
- DECODE_PRINTF("[BP+DI]");
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 3:
+ DECODE_PRINTF("[BP+DI]");
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_DI) & 0xffff;
- case 4:
- DECODE_PRINTF("[SI]");
- return M.x86.R_SI;
- case 5:
- DECODE_PRINTF("[DI]");
- return M.x86.R_DI;
- case 6:
- offset = fetch_word_imm();
- DECODE_PRINTF2("[%04x]", offset);
- return offset;
- case 7:
- DECODE_PRINTF("[BX]");
- return M.x86.R_BX;
- }
- HALT_SYS();
+ case 4:
+ DECODE_PRINTF("[SI]");
+ return M.x86.R_SI;
+ case 5:
+ DECODE_PRINTF("[DI]");
+ return M.x86.R_DI;
+ case 6:
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x]", offset);
+ return offset;
+ case 7:
+ DECODE_PRINTF("[BX]");
+ return M.x86.R_BX;
+ }
+ HALT_SYS();
}
return 0;
}
@@ -918,79 +916,80 @@ REMARKS:
Return the offset given by mod=01 addressing. Also enables the
decoding of instructions.
****************************************************************************/
-u32 decode_rm01_address(
- int rm)
+u32
+decode_rm01_address(int rm)
{
int displacement = 0;
int sib;
/* Fetch disp8 if no SIB byte */
if (!((M.x86.mode & SYSMODE_PREFIX_ADDR) && (rm == 4)))
- displacement = (s8)fetch_byte_imm();
+ displacement = (s8) fetch_byte_imm();
if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
/* 32-bit addressing */
- switch (rm) {
- case 0:
- DECODE_PRINTF2("%d[EAX]", displacement);
- return M.x86.R_EAX + displacement;
- case 1:
- DECODE_PRINTF2("%d[ECX]", displacement);
- return M.x86.R_ECX + displacement;
- case 2:
- DECODE_PRINTF2("%d[EDX]", displacement);
- return M.x86.R_EDX + displacement;
- case 3:
- DECODE_PRINTF2("%d[EBX]", displacement);
- return M.x86.R_EBX + displacement;
- case 4:
- sib = fetch_byte_imm();
- displacement = (s8)fetch_byte_imm();
- DECODE_PRINTF2("%d", displacement);
- return decode_sib_address(sib, 1) + displacement;
- case 5:
- DECODE_PRINTF2("%d[EBP]", displacement);
- return M.x86.R_EBP + displacement;
- case 6:
- DECODE_PRINTF2("%d[ESI]", displacement);
- return M.x86.R_ESI + displacement;
- case 7:
- DECODE_PRINTF2("%d[EDI]", displacement);
- return M.x86.R_EDI + displacement;
- }
- HALT_SYS();
- } else {
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[EAX]", displacement);
+ return M.x86.R_EAX + displacement;
+ case 1:
+ DECODE_PRINTF2("%d[ECX]", displacement);
+ return M.x86.R_ECX + displacement;
+ case 2:
+ DECODE_PRINTF2("%d[EDX]", displacement);
+ return M.x86.R_EDX + displacement;
+ case 3:
+ DECODE_PRINTF2("%d[EBX]", displacement);
+ return M.x86.R_EBX + displacement;
+ case 4:
+ sib = fetch_byte_imm();
+ displacement = (s8) fetch_byte_imm();
+ DECODE_PRINTF2("%d", displacement);
+ return decode_sib_address(sib, 1) + displacement;
+ case 5:
+ DECODE_PRINTF2("%d[EBP]", displacement);
+ return M.x86.R_EBP + displacement;
+ case 6:
+ DECODE_PRINTF2("%d[ESI]", displacement);
+ return M.x86.R_ESI + displacement;
+ case 7:
+ DECODE_PRINTF2("%d[EDI]", displacement);
+ return M.x86.R_EDI + displacement;
+ }
+ HALT_SYS();
+ }
+ else {
/* 16-bit addressing */
- switch (rm) {
- case 0:
- DECODE_PRINTF2("%d[BX+SI]", displacement);
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[BX+SI]", displacement);
return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
- case 1:
- DECODE_PRINTF2("%d[BX+DI]", displacement);
+ case 1:
+ DECODE_PRINTF2("%d[BX+DI]", displacement);
return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
- case 2:
- DECODE_PRINTF2("%d[BP+SI]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 2:
+ DECODE_PRINTF2("%d[BP+SI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
- case 3:
- DECODE_PRINTF2("%d[BP+DI]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 3:
+ DECODE_PRINTF2("%d[BP+DI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
- case 4:
- DECODE_PRINTF2("%d[SI]", displacement);
+ case 4:
+ DECODE_PRINTF2("%d[SI]", displacement);
return (M.x86.R_SI + displacement) & 0xffff;
- case 5:
- DECODE_PRINTF2("%d[DI]", displacement);
+ case 5:
+ DECODE_PRINTF2("%d[DI]", displacement);
return (M.x86.R_DI + displacement) & 0xffff;
- case 6:
- DECODE_PRINTF2("%d[BP]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 6:
+ DECODE_PRINTF2("%d[BP]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + displacement) & 0xffff;
- case 7:
- DECODE_PRINTF2("%d[BX]", displacement);
+ case 7:
+ DECODE_PRINTF2("%d[BX]", displacement);
return (M.x86.R_BX + displacement) & 0xffff;
- }
- HALT_SYS();
+ }
+ HALT_SYS();
}
return 0; /* SHOULD NOT HAPPEN */
}
@@ -1006,86 +1005,87 @@ REMARKS:
Return the offset given by mod=10 addressing. Also enables the
decoding of instructions.
****************************************************************************/
-u32 decode_rm10_address(
- int rm)
+u32
+decode_rm10_address(int rm)
{
u32 displacement = 0;
int sib;
/* Fetch disp16 if 16-bit addr mode */
if (!(M.x86.mode & SYSMODE_PREFIX_ADDR))
- displacement = (u16)fetch_word_imm();
+ displacement = (u16) fetch_word_imm();
else {
- /* Fetch disp32 if no SIB byte */
- if (rm != 4)
- displacement = (u32)fetch_long_imm();
+ /* Fetch disp32 if no SIB byte */
+ if (rm != 4)
+ displacement = (u32) fetch_long_imm();
}
if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
/* 32-bit addressing */
- switch (rm) {
- case 0:
- DECODE_PRINTF2("%08x[EAX]", displacement);
- return M.x86.R_EAX + displacement;
- case 1:
- DECODE_PRINTF2("%08x[ECX]", displacement);
- return M.x86.R_ECX + displacement;
- case 2:
- DECODE_PRINTF2("%08x[EDX]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
- return M.x86.R_EDX + displacement;
- case 3:
- DECODE_PRINTF2("%08x[EBX]", displacement);
- return M.x86.R_EBX + displacement;
- case 4:
- sib = fetch_byte_imm();
- displacement = (u32)fetch_long_imm();
- DECODE_PRINTF2("%08x", displacement);
- return decode_sib_address(sib, 2) + displacement;
- break;
- case 5:
- DECODE_PRINTF2("%08x[EBP]", displacement);
- return M.x86.R_EBP + displacement;
- case 6:
- DECODE_PRINTF2("%08x[ESI]", displacement);
- return M.x86.R_ESI + displacement;
- case 7:
- DECODE_PRINTF2("%08x[EDI]", displacement);
- return M.x86.R_EDI + displacement;
- }
- HALT_SYS();
- } else {
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%08x[EAX]", displacement);
+ return M.x86.R_EAX + displacement;
+ case 1:
+ DECODE_PRINTF2("%08x[ECX]", displacement);
+ return M.x86.R_ECX + displacement;
+ case 2:
+ DECODE_PRINTF2("%08x[EDX]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return M.x86.R_EDX + displacement;
+ case 3:
+ DECODE_PRINTF2("%08x[EBX]", displacement);
+ return M.x86.R_EBX + displacement;
+ case 4:
+ sib = fetch_byte_imm();
+ displacement = (u32) fetch_long_imm();
+ DECODE_PRINTF2("%08x", displacement);
+ return decode_sib_address(sib, 2) + displacement;
+ break;
+ case 5:
+ DECODE_PRINTF2("%08x[EBP]", displacement);
+ return M.x86.R_EBP + displacement;
+ case 6:
+ DECODE_PRINTF2("%08x[ESI]", displacement);
+ return M.x86.R_ESI + displacement;
+ case 7:
+ DECODE_PRINTF2("%08x[EDI]", displacement);
+ return M.x86.R_EDI + displacement;
+ }
+ HALT_SYS();
+ }
+ else {
/* 16-bit addressing */
- switch (rm) {
- case 0:
+ switch (rm) {
+ case 0:
DECODE_PRINTF2("%04x[BX+SI]", displacement);
return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
- case 1:
+ case 1:
DECODE_PRINTF2("%04x[BX+DI]", displacement);
return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
- case 2:
- DECODE_PRINTF2("%04x[BP+SI]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 2:
+ DECODE_PRINTF2("%04x[BP+SI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
- case 3:
- DECODE_PRINTF2("%04x[BP+DI]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 3:
+ DECODE_PRINTF2("%04x[BP+DI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
- case 4:
+ case 4:
DECODE_PRINTF2("%04x[SI]", displacement);
return (M.x86.R_SI + displacement) & 0xffff;
- case 5:
+ case 5:
DECODE_PRINTF2("%04x[DI]", displacement);
return (M.x86.R_DI + displacement) & 0xffff;
- case 6:
- DECODE_PRINTF2("%04x[BP]", displacement);
- M.x86.mode |= SYSMODE_SEG_DS_SS;
+ case 6:
+ DECODE_PRINTF2("%04x[BP]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
return (M.x86.R_BP + displacement) & 0xffff;
- case 7:
+ case 7:
DECODE_PRINTF2("%04x[BX]", displacement);
return (M.x86.R_BX + displacement) & 0xffff;
- }
- HALT_SYS();
+ }
+ HALT_SYS();
}
return 0;
/*NOTREACHED */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 22:05:53 +0000