af60a1ef46
2015-08-03 Sandra Loosemore <sandra@codesourcery.com> gdb/ * nios2-tdep.h: Include opcode/nios2.h here. (NIOS2_CDX_OPCODE_SIZE): New. (struct gdbarch_tdep): Add OP parameter to syscall_next_pc. * nios2-tdep.c: Don't include opcode/nios2.h here. (nios2_fetch_insn): For R2, try reading 2-byte instruction if 4-byte read fails. (nios2_match_add, nios2_match_sub): Add cases for R2 encodings. (nios2_match_addi, nios2_match_orhi): Likewise. (nios2_match_stw, nios2_match_ldw): Likewise. (nios2_match_rdctl): Likewise. (nios2_match_stwm, nios2_match_ldwm): New. (nios2_match_branch): Add cases for R2 encodings. (nios2_match_jmpi, nios2_match_calli): Likewise. (nios2_match_jmpr, nios2_match_callr): Likewise. (nios2_match_break, nios2_match_trap): Likewise. (nios2_in_epilogue_p): Add R2 support. (nios2_analyze_prologue): Update comments. Recognize R2 CDX prologues. (nios2_breakpoint_from_pc): Handle R2 instructions. (nios2_get_next_pc): Likewise. Adjust call to tdep->syscall_next_pc. * nios2-linux-tdep.c (nios2_r1_linux_rt_sigreturn_tramp_frame): Renamed from nios2_linux_rt_sigreturn_tramp_frame. Use instruction field macros instead of literal hex values. (nios2_r2_linux_rt_sigreturn_tramp_frame): New. (nios2_linux_syscall_next_pc): Adjust signature to pass OP. Use size field from OP instead of assuming all instructions are the same size. (nios2_linux_init_abi): Register appropriate unwinder for mach. gdb/gdbserver/ * linux-nios2-low.c (NIOS2_BREAKPOINT): Conditionalize for arch variant. (CDX_BREAKPOINT): Define for R2. (nios2_breakpoint_at): Check for CDX_BREAKPOINT when R2. (the_low_target): Add comments.
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/* Target-dependent header for the Nios II architecture, for GDB.
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Copyright (C) 2012-2015 Free Software Foundation, Inc.
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Contributed by Mentor Graphics, Inc.
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This file is part of GDB.
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef NIOS2_TDEP_H
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#define NIOS2_TDEP_H
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/* Nios II ISA specific encodings and macros. */
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#include "opcode/nios2.h"
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/* Registers. */
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#define NIOS2_Z_REGNUM 0 /* Zero */
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#define NIOS2_R2_REGNUM 2 /* used for return value */
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#define NIOS2_R3_REGNUM 3 /* used for return value */
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/* Used for hidden zero argument to store ptr to struct return value. */
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#define NIOS2_R4_REGNUM 4
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#define NIOS2_R7_REGNUM 7
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#define NIOS2_GP_REGNUM 26 /* Global Pointer */
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#define NIOS2_SP_REGNUM 27 /* Stack Pointer */
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#define NIOS2_FP_REGNUM 28 /* Frame Pointer */
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#define NIOS2_EA_REGNUM 29 /* Exception address */
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#define NIOS2_BA_REGNUM 30 /* Breakpoint return address */
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#define NIOS2_RA_REGNUM 31 /* Return address */
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#define NIOS2_PC_REGNUM 32
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/* Control registers. */
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#define NIOS2_STATUS_REGNUM 33
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#define NIOS2_ESTATUS_REGNUM 34
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#define NIOS2_BSTATUS_REGNUM 35
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#define NIOS2_IENABLE_REGNUM 36
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#define NIOS2_IPENDING_REGNUM 37
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#define NIOS2_CPUID_REGNUM 38
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#define NIOS2_EXCEPTION_REGNUM 40
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#define NIOS2_PTEADDR_REGNUM 41
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#define NIOS2_TLBACC_REGNUM 42
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#define NIOS2_TLBMISC_REGNUM 43
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#define NIOS2_ECCINJ_REGNUM 44
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#define NIOS2_BADADDR_REGNUM 45
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#define NIOS2_CONFIG_REGNUM 46
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#define NIOS2_MPUBASE_REGNUM 47
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#define NIOS2_MPUACC_REGNUM 48
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/* R4-R7 are used for argument passing. */
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#define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM
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#define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM
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/* Number of all registers. */
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#define NIOS2_NUM_REGS 49
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/* Size of an instruction, in bytes. */
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#define NIOS2_OPCODE_SIZE 4
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#define NIOS2_CDX_OPCODE_SIZE 2
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/* Target-dependent structure in gdbarch. */
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struct gdbarch_tdep
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{
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/* Assumes FRAME is stopped at a syscall (trap) instruction; returns
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the expected next PC. */
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CORE_ADDR (*syscall_next_pc) (struct frame_info *frame,
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const struct nios2_opcode *op);
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/* Offset to PC value in jump buffer.
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If this is negative, longjmp support will be disabled. */
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int jb_pc;
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};
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extern struct target_desc *tdesc_nios2_linux;
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extern struct target_desc *tdesc_nios2;
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#endif /* NIOS2_TDEP_H */
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