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736918239b
The basic support for LoongArch has been merged into the upstream Linux kernel since 5.19-rc1 on June 5, 2022. This commit adds orig_a0 which is added into struct user_pt_regs [1] to match the upstream kernel, and then the upstream GDB will work with the upstream kernel. Note that orig_a0 was added into struct user_pt_regs in the development cycle for merging LoongArch port into the upstream Linux kernel, so earlier kernels (notably, the product kernel with version 4.19 used in distros like UOS and Loongnix) don't have it. Inspect arch/loongarch/include/uapi/asm/ptrace.h in the kernel tree to make sure. To build upstream GDB for a kernel lacking orig_a0, it's necessary to revert this commit locally. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/loongarch/include/uapi/asm/ptrace.h#n24 Signed-off-by: Xi Ruoyao <xry111@xry111.site> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/* Target-dependent header for the LoongArch architecture, for GDB.
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Copyright (C) 2022 Free Software Foundation, 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 LOONGARCH_TDEP_H
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#define LOONGARCH_TDEP_H
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#include "gdbarch.h"
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#include "arch/loongarch.h"
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#include "regset.h"
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#include "elf/loongarch.h"
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#include "opcode/loongarch.h"
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/* Register numbers of various important registers. */
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enum
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{
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LOONGARCH_RA_REGNUM = 1, /* Return Address. */
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LOONGARCH_SP_REGNUM = 3, /* Stack Pointer. */
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LOONGARCH_A0_REGNUM = 4, /* First Argument/Return Value. */
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LOONGARCH_A7_REGNUM = 11, /* Seventh Argument/Syscall Number. */
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LOONGARCH_FP_REGNUM = 22, /* Frame Pointer. */
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LOONGARCH_ORIG_A0_REGNUM = 32, /* Syscall's original arg0. */
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LOONGARCH_PC_REGNUM = 33, /* Program Counter. */
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LOONGARCH_BADV_REGNUM = 34, /* Bad Vaddr for Addressing Exception. */
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LOONGARCH_LINUX_NUM_GREGSET = 45, /* 32 GPR, ORIG_A0, PC, BADV, RESERVED 10. */
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};
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/* Register set definitions. */
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extern const struct regset loongarch_gregset;
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/* Target-dependent structure in gdbarch. */
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struct loongarch_gdbarch_tdep : gdbarch_tdep
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{
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/* Features about the abi that impact how the gdbarch is configured. */
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struct loongarch_gdbarch_features abi_features;
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/* Return the expected next PC if FRAME is stopped at a syscall instruction. */
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CORE_ADDR (*syscall_next_pc) (struct frame_info *frame) = nullptr;
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};
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#endif /* LOONGARCH_TDEP_H */
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