This is now just a front end to the general purpose disassembler
in disassem.c
This commit is contained in:
mark
parent
c54b8cd7c1
commit
4280862834
@ -1,4 +1,4 @@
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/* $NetBSD: db_disasm.c,v 1.10 1997/01/12 14:21:44 mark Exp $ */
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/* $NetBSD: db_disasm.c,v 1.11 1997/10/14 10:18:02 mark Exp $ */
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/*
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* Copyright (c) 1996 Mark Brinicombe.
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@ -55,495 +55,36 @@
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#include <ddb/db_output.h>
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#include <ddb/db_access.h>
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/*
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* General instruction format
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*
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* insn[cc][mod] [operands]
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*
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* Those fields with an uppercase format code indicate that the field follows
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* directly after the instruction before the separator i.e. they modify the instruction
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* rather than just being an operand to the instruction. The only exception is the
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* writeback flag which follows a operand.
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*
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*
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* 2 - print Operand 2 of a data processing instrcution
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* d - destination register (bits 12-15)
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* n - n register (bits 16-19)
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* s - s register (bits 8-11)
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* o - indirect register rn (bits 16-19) (used by swap)
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* m - m register (bits 0-4)
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* a - address operand of ldr/str instruction
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* l - register list for ldm/stm instruction
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* f - 1st fp operand (register) (bits 12-14)
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* g - 2nd fp operand (register) (bits 16-18)
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* h - 3rd fp operand (register/immediate) (bits 0-4)
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* b - branch address
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* X - block transfer type
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* Y - block transfer type (r13 base)
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* c - comment field bits(0-23)
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* p - saved or current status register
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* F - PSR transfer fields
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* B - byte transfer flag
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* L - co-processor transfer size
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* S - set status flag
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* T - user mode transfer
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* P - fp precision
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* Q - fp precision (for ldf/stf)
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* R - fp rounding
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* v - co-processor data transfer registers + addressing mode
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* w - writeback flag
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* x - instruction in hex
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* # - co-processor number
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* y - co-processor data processing registers
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* z - co-processor register transfer registers
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*/
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#include <arm32/arm32/disassem.h>
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struct arm32_insn {
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u_int mask;
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u_int pattern;
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char* name;
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char* format;
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};
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/* Glue code to interface db_disasm to the generic ARM disassembler */
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struct arm32_insn arm32_i[] = {
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{ 0x0fffffff, 0x0ff00000, "imb", "c" }, /* Before swi */
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{ 0x0fffffff, 0x0ff00001, "imbrange", "c" }, /* Before swi */
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{ 0x0f000000, 0x0f000000, "swi", "c" },
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{ 0x0f000000, 0x0a000000, "b", "b" },
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{ 0x0f000000, 0x0b000000, "bl", "b" },
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{ 0x0fe000f0, 0x00000090, "mul", "Snms" },
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{ 0x0fe000f0, 0x00200090, "mla", "Snmsd" },
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{ 0x0fe000f0, 0x00800090, "umull", "Sdnms" },
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{ 0x0fe000f0, 0x00c00090, "smull", "Sdnms" },
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{ 0x0fe000f0, 0x00a00090, "umlal", "Sdnms" },
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{ 0x0fe000f0, 0x00e00090, "smlal", "Sdnms" },
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{ 0x0e100000, 0x04000000, "str", "BTdaW" },
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{ 0x0e100000, 0x04100000, "ldr", "BTdaW" },
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{ 0x0c100010, 0x04000000, "str", "BTdaW" },
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{ 0x0c100010, 0x04100000, "ldr", "BTdaW" },
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{ 0x0e1f0000, 0x080d0000, "stm", "YnWl" }, /* separate out r13 base */
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{ 0x0e1f0000, 0x081d0000, "ldm", "YnWl" }, /* separate out r13 base */
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{ 0x0e100000, 0x08000000, "stm", "XnWl" },
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{ 0x0e100000, 0x08100000, "ldm", "XnWl" },
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{ 0x0e500ff0, 0x001000b0, "ldrh", "daW" },
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{ 0x0e500ff0, 0x000000b0, "strh", "daW" },
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{ 0x0e500ff0, 0x001000d0, "ldrsb", "daW" },
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{ 0x0e500ff0, 0x001000f0, "ldrsh", "daW" },
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{ 0x0f200090, 0x00200090, "undefined", "x" }, /* Before data processing */
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{ 0x0e1000d0, 0x000000d0, "undefined", "x" }, /* Before data processing */
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{ 0x0fb00ff0, 0x01000090, "swap", "Bdmo" },
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{ 0x0fbf0fff, 0x010f0000, "mrs", "dp" }, /* Before data processing */
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{ 0x0fb0fff0, 0x0120f000, "msr", "pFm" }, /* Before data processing */
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{ 0x0fb0f000, 0x0320f000, "msr", "pF2" }, /* Before data processing */
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{ 0x0de00000, 0x00000000, "and", "Sdn2" },
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{ 0x0de00000, 0x00200000, "eor", "Sdn2" },
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{ 0x0de00000, 0x00400000, "sub", "Sdn2" },
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{ 0x0de00000, 0x00600000, "rsb", "Sdn2" },
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{ 0x0de00000, 0x00800000, "add", "Sdn2" },
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{ 0x0de00000, 0x00a00000, "adc", "Sdn2" },
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{ 0x0de00000, 0x00c00000, "sbc", "Sdn2" },
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{ 0x0de00000, 0x00e00000, "rsc", "Sdn2" },
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{ 0x0df00000, 0x01100000, "tst", "Sn2" },
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{ 0x0df00000, 0x01300000, "teq", "Sn2" },
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{ 0x0de00000, 0x01400000, "cmp", "Sn2" },
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{ 0x0de00000, 0x01600000, "cmn", "Sn2" },
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{ 0x0de00000, 0x01800000, "orr", "Sdn2" },
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{ 0x0de00000, 0x01a00000, "mov", "Sd2" },
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{ 0x0de00000, 0x01c00000, "bic", "Sdn2" },
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{ 0x0de00000, 0x01e00000, "mvn", "Sd2" },
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{ 0x0ff08f10, 0x0e000100, "adf", "PRfgh" },
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{ 0x0ff08f10, 0x0e100100, "muf", "PRfgh" },
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{ 0x0ff08f10, 0x0e200100, "suf", "PRfgh" },
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{ 0x0ff08f10, 0x0e300100, "rsf", "PRfgh" },
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{ 0x0ff08f10, 0x0e400100, "dvf", "PRfgh" },
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{ 0x0ff08f10, 0x0e500100, "rdf", "PRfgh" },
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{ 0x0ff08f10, 0x0e600100, "pow", "PRfgh" },
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{ 0x0ff08f10, 0x0e700100, "rpw", "PRfgh" },
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{ 0x0ff08f10, 0x0e800100, "rmf", "PRfgh" },
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{ 0x0ff08f10, 0x0e900100, "fml", "PRfgh" },
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{ 0x0ff08f10, 0x0ea00100, "fdv", "PRfgh" },
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{ 0x0ff08f10, 0x0eb00100, "frd", "PRfgh" },
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{ 0x0ff08f10, 0x0ec00100, "pol", "PRfgh" },
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{ 0x0f008f10, 0x0e000100, "fpbop", "PRfgh" },
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{ 0x0ff08f10, 0x0e008100, "mvf", "PRfh" },
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{ 0x0ff08f10, 0x0e108100, "mnf", "PRfh" },
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{ 0x0ff08f10, 0x0e208100, "abs", "PRfh" },
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{ 0x0ff08f10, 0x0e308100, "rnd", "PRfh" },
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{ 0x0ff08f10, 0x0e408100, "sqt", "PRfh" },
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{ 0x0ff08f10, 0x0e508100, "log", "PRfh" },
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{ 0x0ff08f10, 0x0e608100, "lgn", "PRfh" },
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{ 0x0ff08f10, 0x0e708100, "exp", "PRfh" },
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{ 0x0ff08f10, 0x0e808100, "sin", "PRfh" },
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{ 0x0ff08f10, 0x0e908100, "cos", "PRfh" },
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{ 0x0ff08f10, 0x0ea08100, "tan", "PRfh" },
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{ 0x0ff08f10, 0x0eb08100, "asn", "PRfh" },
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{ 0x0ff08f10, 0x0ec08100, "acs", "PRfh" },
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{ 0x0ff08f10, 0x0ed08100, "atn", "PRfh" },
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{ 0x0f008f10, 0x0e008100, "fpuop", "PRfh" },
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{ 0x0e100f00, 0x0c000100, "stf", "QLv" },
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{ 0x0e100f00, 0x0c100100, "ldf", "QLv" },
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{ 0x0ff00f10, 0x0e000110, "flt", "PRgd" },
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{ 0x0ff00f10, 0x0e100110, "fix", "PRdh" },
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{ 0x0ff00f10, 0x0e200110, "wfs", "d" },
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{ 0x0ff00f10, 0x0e300110, "rfs", "d" },
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{ 0x0ff00f10, 0x0e400110, "wfc", "d" },
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{ 0x0ff00f10, 0x0e500110, "rfc", "d" },
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{ 0x0ff0ff10, 0x0e90f110, "cmf", "PRgh" },
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{ 0x0ff0ff10, 0x0eb0f110, "cnf", "PRgh" },
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{ 0x0ff0ff10, 0x0ed0f110, "cmfe", "PRgh" },
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{ 0x0ff0ff10, 0x0ef0f110, "cnfe", "PRgh" },
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{ 0x0f100010, 0x0e000010, "mcr", "#z" },
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{ 0x0f100010, 0x0e100010, "mrc", "#z" },
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{ 0x0f000010, 0x0e000000, "cdp", "#y" },
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{ 0x0e100090, 0x0c100000, "ldc", "L#v" },
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{ 0x0e100090, 0x0c000000, "stc", "L#v" },
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{ 0x00000000, 0x00000000, NULL, NULL }
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};
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char *arm32_insn_conditions[] = {
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"eq", "ne", "cs", "cc",
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"mi", "pl", "vs", "vc",
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"hi", "ls", "ge", "lt",
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"gt", "le", "", "nv"
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};
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char *insn_block_transfers[] = {
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"da", "ia", "db", "ib"
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};
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char *insn_stack_block_transfers[] = {
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"fa", "ea", "fd", "fa"
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};
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char *op_shifts[] = {
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"lsl", "lsr", "asr", "ror"
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};
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char *insn_fpa_rounding[] = {
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"", "p", "m", "z"
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};
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char *insn_fpa_precision[] = {
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"s", "d", "e", "p"
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};
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char *insn_fpaconstants[] = {
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"0.0", "1.0", "2.0", "3.0",
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"4.0", "5.0", "0.5", "10.0"
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};
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#define insn_condition(x) arm32_insn_conditions[(x >> 28) & 0x0f]
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#define insn_blktrans(x) insn_block_transfers[(x >> 23) & 3]
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#define insn_stkblktrans(x) insn_stack_block_transfers[(x >> 23) & 3]
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#define op2_shift(x) op_shifts[(x >> 5) & 3]
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#define insn_fparnd(x) insn_fpa_rounding[(x >> 5) & 0x03]
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#define insn_fpaprec(x) insn_fpa_precision[(((x >> 18) & 2)|(x >> 7)) & 1]
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#define insn_fpaprect(x) insn_fpa_precision[(((x >> 21) & 2)|(x >> 15)) & 1]
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#define insn_fpaimm(x) insn_fpaconstants[x & 0x07]
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void db_register_shift __P((u_int insn));
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void db_print_reglist __P((u_int insn));
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void db_insn_ldrstr __P((u_int insn, u_int loc));
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void db_insn_cdt __P((u_int insn, u_int loc));
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static u_int
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db_disasm_read_word(address)
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u_int address;
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{
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return(db_get_value(address, 4, 0));
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}
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static void
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db_disasm_printaddr(address)
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u_int address;
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{
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db_printsym((db_addr_t)address, DB_STGY_ANY);
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}
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vm_offset_t
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db_disasm(loc, altfmt)
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vm_offset_t loc;
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boolean_t altfmt;
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{
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struct arm32_insn *i_ptr = (struct arm32_insn *)&arm32_i;
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disasm_interface_t di;
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u_int insn;
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int matchp;
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int branch;
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char* f_ptr;
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int fmt;
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di.di_readword = db_disasm_read_word;
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di.di_printaddr = db_disasm_printaddr;
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di.di_printf = db_printf;
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fmt = 0;
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matchp = 0;
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insn = db_get_value(loc, 4, 0);
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/* db_printf("loc=%08x insn=%08x : ", loc, insn);*/
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while (i_ptr->name) {
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if ((insn & i_ptr->mask) == i_ptr->pattern) {
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matchp = 1;
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break;
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}
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i_ptr++;
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}
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if (!matchp) {
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db_printf("undefined [%08x]\n", insn);
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return(loc + 4);
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}
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db_printf("%s%s", i_ptr->name, insn_condition(insn));
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f_ptr = i_ptr->format;
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/* Insert tab if there are no instruction modifiers */
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if (*(f_ptr) < 'A' || *(f_ptr) > 'Z') {
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++fmt;
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db_printf("\t");
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}
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while (*f_ptr) {
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switch (*f_ptr) {
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case '2':
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if (insn & 0x02000000) {
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int shift = ((insn >> 7) & 0x1e);
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if (shift == 0)
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db_printf("#0x%08x", (insn & 0xff));
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else
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db_printf("#0x%08x", ((insn & 0xff) << (32 - shift)));
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} else {
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db_register_shift(insn);
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}
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break;
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case 'd':
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db_printf("r%d", ((insn >> 12) & 0x0f));
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break;
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case 'n':
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db_printf("r%d", ((insn >> 16) & 0x0f));
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break;
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case 's':
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db_printf("r%d", ((insn >> 8) & 0x0f));
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break;
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case 'o':
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db_printf("[r%d]", ((insn >> 16) & 0x0f));
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break;
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case 'm':
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db_printf("r%d", ((insn >> 0) & 0x0f));
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break;
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case 'a':
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db_insn_ldrstr(insn, loc);
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break;
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case 'l':
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db_print_reglist(insn);
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break;
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case 'f':
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db_printf("f%d", (insn >> 12) & 7);
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break;
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case 'g':
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db_printf("f%d", (insn >> 16) & 7);
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break;
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case 'h':
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if (insn & (1 << 3))
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db_printf("#%s", insn_fpaimm(insn));
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else
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db_printf("f%d", insn & 7);
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break;
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case 'b':
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branch = ((insn << 2) & 0x03ffffff);
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if (branch & 0x02000000)
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branch |= 0xfc000000;
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db_printsym((db_addr_t)(loc + 8 + branch),
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DB_STGY_ANY);
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break;
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case 'X':
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db_printf("%s", insn_blktrans(insn));
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break;
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case 'Y':
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db_printf("%s", insn_stkblktrans(insn));
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break;
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case 'c':
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db_printf("0x%08x", (insn & 0x00ffffff));
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break;
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case 'p':
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if (insn & 0x00400000)
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db_printf("spsr");
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else
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db_printf("cpsr");
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break;
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case 'F':
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db_printf("_");
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if (insn & (1 << 16))
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db_printf("c");
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if (insn & (1 << 17))
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db_printf("x");
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if (insn & (1 << 18))
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db_printf("s");
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if (insn & (1 << 19))
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db_printf("f");
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break;
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case 'B':
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if (insn & 0x00400000)
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db_printf("b");
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break;
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case 'L':
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if (insn & (1 << 22))
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db_printf("l");
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break;
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case 'S':
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if (insn & 0x00100000)
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db_printf("s");
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break;
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case 'T':
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if ((insn & 0x01200000) == 0x00200000)
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db_printf("t");
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break;
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case 'P':
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db_printf("%s", insn_fpaprec(insn));
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break;
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case 'R':
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db_printf("%s", insn_fparnd(insn));
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break;
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case 'W':
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if (insn & (1 << 21))
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db_printf("!");
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break;
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case '#':
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db_printf("p%d", (insn >> 8) & 0x0f);
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break;
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case 'y':
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db_printf("%d, ", (insn >> 20) & 0x0f);
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db_printf("c%d, c%d, c%d", (insn >> 12) & 0x0f, (insn >> 16) & 0x0f,
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insn & 0x0f);
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db_printf(", %d", (insn >> 5) & 0x07);
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break;
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case 'z':
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db_printf("%d, ", (insn >> 21) & 0x07);
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db_printf("r%d, c%d, c%d, %d", (insn >> 12) & 0x0f, (insn >> 16) & 0x0f,
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insn & 0x0f, (insn >> 5) & 0x07);
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|
||||
/* if (((insn >> 5) & 0x07) != 0)
|
||||
db_printf(", %d", (insn >> 5) & 0x07);*/
|
||||
break;
|
||||
default:
|
||||
db_printf("[%02x:%c](unknown)", *f_ptr, *f_ptr);
|
||||
break;
|
||||
}
|
||||
if (*(f_ptr+1) >= 'A' && *(f_ptr+1) <= 'Z')
|
||||
++f_ptr;
|
||||
else if (*(++f_ptr)) {
|
||||
++fmt;
|
||||
if (fmt == 1)
|
||||
db_printf("\t");
|
||||
else
|
||||
db_printf(", ");
|
||||
}
|
||||
};
|
||||
|
||||
db_printf("\n");
|
||||
|
||||
return(loc + 4);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
db_register_shift(insn)
|
||||
u_int insn;
|
||||
{
|
||||
db_printf("r%d", (insn & 0x0f));
|
||||
if ((insn & 0x00000ff0) == 0)
|
||||
;
|
||||
else if ((insn & 0x00000ff0) == 0x00000060)
|
||||
db_printf(", RRX");
|
||||
else {
|
||||
if (insn & 0x10)
|
||||
db_printf(", %s r%d", op2_shift(insn),
|
||||
(insn >> 8) & 0x0f);
|
||||
else
|
||||
db_printf(", %s #%d", op2_shift(insn),
|
||||
(insn >> 7) & 0x1f);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
db_print_reglist(insn)
|
||||
u_int insn;
|
||||
{
|
||||
int loop;
|
||||
int start;
|
||||
int comma;
|
||||
|
||||
db_printf("{");
|
||||
start = -1;
|
||||
comma = 0;
|
||||
|
||||
for (loop = 0; loop < 17; ++loop) {
|
||||
if (start != -1) {
|
||||
if (!(insn & (1 << loop)) || loop == 16) {
|
||||
if (comma)
|
||||
db_printf(", ");
|
||||
else
|
||||
comma = 1;
|
||||
if (start == loop - 1)
|
||||
db_printf("r%d", start);
|
||||
else
|
||||
db_printf("r%d-r%d", start, loop - 1);
|
||||
start = -1;
|
||||
}
|
||||
} else {
|
||||
if (insn & (1 << loop))
|
||||
start = loop;
|
||||
}
|
||||
}
|
||||
db_printf("}");
|
||||
|
||||
if (insn & (1 << 22))
|
||||
db_printf("^");
|
||||
}
|
||||
|
||||
void
|
||||
db_insn_ldrstr(insn, loc)
|
||||
u_int insn;
|
||||
u_int loc;
|
||||
{
|
||||
if ((((insn >> 16) & 0x0f) == 15) && ((insn & (1 << 21)) == 0)
|
||||
&& ((insn & (1 << 24)) != 0) && ((insn & (1 << 25)) == 0)) {
|
||||
if (insn & 0x00800000)
|
||||
loc += (insn & 0xffff);
|
||||
else
|
||||
loc -= (insn & 0xffff);
|
||||
db_printsym((db_addr_t)(loc - 8), DB_STGY_ANY);
|
||||
} else {
|
||||
db_printf("[r%d", (insn >> 16) & 0x0f);
|
||||
db_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
|
||||
|
||||
if (!(insn & 0x00800000))
|
||||
db_printf("-");
|
||||
if (insn & (1 << 25))
|
||||
db_register_shift(insn);
|
||||
else
|
||||
db_printf("#0x%04x", insn & 0xfff);
|
||||
if (insn & (1 << 24))
|
||||
db_printf("]");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
db_insn_ldcstc(insn, loc)
|
||||
u_int insn;
|
||||
u_int loc;
|
||||
{
|
||||
if (((insn >> 8) & 0xf) == 1)
|
||||
db_printf("f%d, ", (insn >> 12) & 0x07);
|
||||
else
|
||||
db_printf("c%d, ", (insn >> 12) & 0x0f);
|
||||
|
||||
db_printf("[r%d", (insn >> 16) & 0x0f);
|
||||
|
||||
db_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
|
||||
|
||||
if (!(insn & (1 << 23)))
|
||||
db_printf("-");
|
||||
|
||||
db_printf("#0x%03x", (insn & 0xff) << 2);
|
||||
|
||||
if (insn & (1 << 24))
|
||||
db_printf("]");
|
||||
|
||||
if (insn & (1 << 21))
|
||||
db_printf("!");
|
||||
return(disasm(&di, loc, altfmt));
|
||||
}
|
||||
|
||||
/* End of db_disasm.c */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user