271 lines
8.9 KiB
C
271 lines
8.9 KiB
C
/*
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* Debugger ARM specific functions
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*
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* Copyright 2000-2003 Marcus Meissner
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* 2004 Eric Pouech
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* 2010, 2011 André Hentschel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "debugger.h"
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#if defined(__arm__)
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static unsigned be_arm_get_addr(HANDLE hThread, const CONTEXT* ctx,
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enum be_cpu_addr bca, ADDRESS64* addr)
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{
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switch (bca)
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{
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case be_cpu_addr_pc:
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return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Pc);
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case be_cpu_addr_stack:
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return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Sp);
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case be_cpu_addr_frame:
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return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Fp);
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}
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return FALSE;
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}
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static unsigned be_arm_get_register_info(int regno, enum be_cpu_addr* kind)
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{
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switch (regno)
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{
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case CV_ARM_PC: *kind = be_cpu_addr_pc; return TRUE;
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case CV_ARM_R0 + 11: *kind = be_cpu_addr_frame; return TRUE;
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case CV_ARM_SP: *kind = be_cpu_addr_stack; return TRUE;
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}
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return FALSE;
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}
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static void be_arm_single_step(CONTEXT* ctx, unsigned enable)
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{
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dbg_printf("be_arm_single_step: not done\n");
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}
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static void be_arm_print_context(HANDLE hThread, const CONTEXT* ctx, int all_regs)
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{
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static const char condflags[] = "NZCV";
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int i;
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char buf[8];
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switch (ctx->Cpsr & 0x1F)
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{
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case 0: strcpy(buf, "User26"); break;
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case 1: strcpy(buf, "FIQ26"); break;
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case 2: strcpy(buf, "IRQ26"); break;
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case 3: strcpy(buf, "SVC26"); break;
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case 16: strcpy(buf, "User"); break;
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case 17: strcpy(buf, "FIQ"); break;
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case 18: strcpy(buf, "IRQ"); break;
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case 19: strcpy(buf, "SVC"); break;
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case 23: strcpy(buf, "ABT"); break;
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case 27: strcpy(buf, "UND"); break;
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default: strcpy(buf, "UNKNWN"); break;
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}
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dbg_printf("Register dump:\n");
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dbg_printf("%s %s Mode\n", (ctx->Cpsr & 0x20) ? "Thumb" : "ARM", buf);
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strcpy(buf, condflags);
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for (i = 0; buf[i]; i++)
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if (!((ctx->Cpsr >> 26) & (1 << (sizeof(condflags) - i))))
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buf[i] = '-';
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dbg_printf(" Pc:%04x Sp:%04x Lr:%04x Cpsr:%04x(%s)\n",
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ctx->Pc, ctx->Sp, ctx->Lr, ctx->Cpsr, buf);
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dbg_printf(" r0:%04x r1:%04x r2:%04x r3:%04x\n",
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ctx->R0, ctx->R1, ctx->R2, ctx->R3);
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dbg_printf(" r4:%04x r5:%04x r6:%04x r7:%04x r8:%04x\n",
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ctx->R4, ctx->R5, ctx->R6, ctx->R7, ctx->R8 );
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dbg_printf(" r9:%04x r10:%04x Fp:%04x Ip:%04x\n",
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ctx->R9, ctx->R10, ctx->Fp, ctx->Ip );
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if (all_regs) dbg_printf( "Floating point ARM dump not implemented\n" );
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}
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static void be_arm_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
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{
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}
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static struct dbg_internal_var be_arm_ctx[] =
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{
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{CV_ARM_R0 + 0, "r0", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R0), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 1, "r1", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R1), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 2, "r2", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R2), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 3, "r3", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R3), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 4, "r4", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R4), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 5, "r5", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R5), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 6, "r6", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R6), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 7, "r7", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R7), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 8, "r8", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R8), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 9, "r9", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R9), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 10, "r10", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R10), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 11, "r11", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Fp), dbg_itype_unsigned_int},
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{CV_ARM_R0 + 12, "r12", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Ip), dbg_itype_unsigned_int},
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{CV_ARM_SP, "sp", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Sp), dbg_itype_unsigned_int},
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{CV_ARM_LR, "lr", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Lr), dbg_itype_unsigned_int},
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{CV_ARM_PC, "pc", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Pc), dbg_itype_unsigned_int},
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{CV_ARM_CPSR, "cpsr", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Cpsr), dbg_itype_unsigned_int},
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{0, NULL, 0, dbg_itype_none}
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};
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static unsigned be_arm_is_step_over_insn(const void* insn)
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{
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dbg_printf("be_arm_is_step_over_insn: not done\n");
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return FALSE;
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}
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static unsigned be_arm_is_function_return(const void* insn)
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{
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dbg_printf("be_arm_is_function_return: not done\n");
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return FALSE;
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}
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static unsigned be_arm_is_break_insn(const void* insn)
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{
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dbg_printf("be_arm_is_break_insn: not done\n");
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return FALSE;
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}
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static unsigned be_arm_is_func_call(const void* insn, ADDRESS64* callee)
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{
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return FALSE;
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}
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static unsigned be_arm_is_jump(const void* insn, ADDRESS64* jumpee)
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{
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return FALSE;
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}
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static void be_arm_disasm_one_insn(ADDRESS64* addr, int display)
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{
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dbg_printf("Disasm NIY\n");
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}
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static unsigned be_arm_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
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CONTEXT* ctx, enum be_xpoint_type type,
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void* addr, unsigned long* val, unsigned size)
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{
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SIZE_T sz;
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switch (type)
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{
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case be_xpoint_break:
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if (!size) return 0;
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if (!pio->read(hProcess, addr, val, 4, &sz) || sz != 4) return 0;
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default:
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dbg_printf("Unknown/unsupported bp type %c\n", type);
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return 0;
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}
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return 1;
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}
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static unsigned be_arm_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
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CONTEXT* ctx, enum be_xpoint_type type,
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void* addr, unsigned long val, unsigned size)
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{
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SIZE_T sz;
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switch (type)
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{
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case be_xpoint_break:
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if (!size) return 0;
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if (!pio->write(hProcess, addr, &val, 4, &sz) || sz == 4) return 0;
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break;
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default:
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dbg_printf("Unknown/unsupported bp type %c\n", type);
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return 0;
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}
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return 1;
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}
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static unsigned be_arm_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
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{
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dbg_printf("be_arm_is_watchpoint_set: not done\n");
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return FALSE;
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}
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static void be_arm_clear_watchpoint(CONTEXT* ctx, unsigned idx)
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{
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dbg_printf("be_arm_clear_watchpoint: not done\n");
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}
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static int be_arm_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
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{
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if (way)
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{
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ctx->Pc-=4;
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return -4;
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}
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ctx->Pc+=4;
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return 4;
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}
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static int be_arm_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
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unsigned ext_sign, LONGLONG* ret)
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{
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if (size != 1 && size != 2 && size != 4 && size != 8) return FALSE;
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memset(ret, 0, sizeof(*ret)); /* clear unread bytes */
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/* FIXME: this assumes that debuggee and debugger use the same
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* integral representation
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*/
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if (!memory_read_value(lvalue, size, ret)) return FALSE;
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/* propagate sign information */
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if (ext_sign && size < 8 && (*ret >> (size * 8 - 1)) != 0)
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{
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ULONGLONG neg = -1;
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*ret |= neg << (size * 8);
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}
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return TRUE;
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}
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static int be_arm_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
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long double* ret)
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{
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dbg_printf("be_arm_fetch_float: not done\n");
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return FALSE;
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}
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struct backend_cpu be_arm =
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{
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IMAGE_FILE_MACHINE_ARM,
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4,
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be_cpu_linearize,
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be_cpu_build_addr,
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be_arm_get_addr,
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be_arm_get_register_info,
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be_arm_single_step,
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be_arm_print_context,
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be_arm_print_segment_info,
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be_arm_ctx,
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be_arm_is_step_over_insn,
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be_arm_is_function_return,
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be_arm_is_break_insn,
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be_arm_is_func_call,
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be_arm_is_jump,
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be_arm_disasm_one_insn,
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be_arm_insert_Xpoint,
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be_arm_remove_Xpoint,
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be_arm_is_watchpoint_set,
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be_arm_clear_watchpoint,
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be_arm_adjust_pc_for_break,
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be_arm_fetch_integer,
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be_arm_fetch_float,
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};
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#endif
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