Adding aarch64-linux-tdep support.
2013-02-04 Jim MacArthur <jim.macarthur@arm.com>
Marcus Shawcroft <marcus.shawcroft@arm.com>
Nigel Stephens <nigel.stephens@arm.com>
Yufeng Zhang <yufeng.zhang@arm.com>
* Makefile.in (ALL_64_TARGET_OBS): Add aarch64-linux-tdep.o.
(ALLDEPFILES): Add aarch64-linux-tdep.c.
* aarch64-linux-tdep.c: New file.
* aarch64-linux-tdep.h: New file.
* aarch64-tdep.h (gdbarch_tdep): Define gregset and fpregset.
* configure.tgt: Add aarch64-none-linux-gnu.
This commit is contained in:
Marcus Shawcroft
parent
07b287a0d1
commit
1ae3db1961
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@ -1,3 +1,15 @@
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2013-02-04 Jim MacArthur <jim.macarthur@arm.com>
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Marcus Shawcroft <marcus.shawcroft@arm.com>
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Nigel Stephens <nigel.stephens@arm.com>
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Yufeng Zhang <yufeng.zhang@arm.com>
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* Makefile.in (ALL_64_TARGET_OBS): Add aarch64-linux-tdep.o.
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(ALLDEPFILES): Add aarch64-linux-tdep.c.
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* aarch64-linux-tdep.c: New file.
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* aarch64-linux-tdep.h: New file.
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* aarch64-tdep.h (gdbarch_tdep): Define gregset and fpregset.
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* configure.tgt: Add aarch64-none-linux-gnu.
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2013-02-04 Jim MacArthur <jim.macarthur@arm.com>
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Marcus Shawcroft <marcus.shawcroft@arm.com>
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Nigel Stephens <nigel.stephens@arm.com>
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@ -521,7 +521,7 @@ TARGET_OBS = @TARGET_OBS@
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# All target-dependent objects files that require 64-bit CORE_ADDR
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# (used with --enable-targets=all --enable-64-bit-bfd).
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ALL_64_TARGET_OBS = \
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aarch64-tdep.o \
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aarch64-tdep.o aarch64-linux-tdep.o \
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alphabsd-tdep.o alphafbsd-tdep.o alpha-linux-tdep.o alpha-mdebug-tdep.o \
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alphanbsd-tdep.o alphaobsd-tdep.o alpha-osf1-tdep.o alpha-tdep.o \
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amd64fbsd-tdep.o amd64-darwin-tdep.o amd64-dicos-tdep.o \
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@ -1421,7 +1421,7 @@ force_update:
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MAKEOVERRIDES=
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ALLDEPFILES = \
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aarch64-tdep.c \
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aarch64-tdep.c aarch64-linux-tdep.c \
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aix-thread.c \
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alpha-nat.c alphabsd-nat.c alpha-linux-nat.c \
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alpha-tdep.c alpha-mdebug-tdep.c \
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@ -0,0 +1,297 @@
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/* Target-dependent code for GNU/Linux AArch64.
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Copyright (C) 2009-2013 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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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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#include "defs.h"
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#include "gdbarch.h"
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#include "glibc-tdep.h"
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#include "linux-tdep.h"
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#include "aarch64-tdep.h"
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#include "aarch64-linux-tdep.h"
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#include "osabi.h"
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#include "solib-svr4.h"
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#include "symtab.h"
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#include "tramp-frame.h"
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#include "trad-frame.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "regset.h"
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/* The general-purpose regset consists of 31 X registers, plus SP, PC,
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PSTATE and two extra pseudo 64-bit registers, as defined in the
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AArch64 port of the Linux kernel. */
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#define AARCH64_LINUX_SIZEOF_GREGSET (36 * X_REGISTER_SIZE)
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/* The fp regset consists of 32 V registers, plus FPCR and FPSR which
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are 4 bytes wide each, and the whole structure is padded to 128 bit
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alignment. */
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#define AARCH64_LINUX_SIZEOF_FPREGSET (33 * V_REGISTER_SIZE)
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/* Signal frame handling.
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+----------+ ^
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| saved lr | |
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+->| saved fp |--+
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| | |
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| | |
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| +----------+
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| | saved lr |
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+--| saved fp |
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^ | |
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| | |
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| +----------+
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^ | |
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| | signal |
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| | |
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| | saved lr |-->interrupted_function_pc
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+--| saved fp |
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| +----------+
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| | saved lr |--> default_restorer (movz x8, NR_sys_rt_sigreturn; svc 0)
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+--| saved fp |<- FP
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| |
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| |<- SP
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+----------+
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On signal delivery, the kernel will create a signal handler stack
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frame and setup the return address in LR to point at restorer stub.
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The signal stack frame is defined by:
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struct rt_sigframe
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{
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siginfo_t info;
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struct ucontext uc;
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};
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typedef struct
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{
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... 128 bytes
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} siginfo_t;
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The ucontext has the following form:
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struct ucontext
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{
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unsigned long uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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sigset_t uc_sigmask;
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struct sigcontext uc_mcontext;
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};
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typedef struct sigaltstack
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{
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void *ss_sp;
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int ss_flags;
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size_t ss_size;
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} stack_t;
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struct sigcontext
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{
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unsigned long fault_address;
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unsigned long regs[31];
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unsigned long sp; / * 31 * /
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unsigned long pc; / * 32 * /
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unsigned long pstate; / * 33 * /
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__u8 __reserved[4096]
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};
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The restorer stub will always have the form:
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d28015a8 movz x8, #0xad
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d4000001 svc #0x0
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We detect signal frames by snooping the return code for the restorer
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instruction sequence.
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The handler then needs to recover the saved register set from
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ucontext.uc_mcontext. */
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/* These magic numbers need to reflect the layout of the kernel
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defined struct rt_sigframe and ucontext. */
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#define AARCH64_SIGCONTEXT_REG_SIZE 8
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#define AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET 128
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#define AARCH64_UCONTEXT_SIGCONTEXT_OFFSET 176
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#define AARCH64_SIGCONTEXT_XO_OFFSET 8
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/* Implement the "init" method of struct tramp_frame. */
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static void
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aarch64_linux_sigframe_init (const struct tramp_frame *self,
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struct frame_info *this_frame,
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struct trad_frame_cache *this_cache,
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CORE_ADDR func)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
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CORE_ADDR fp = get_frame_register_unsigned (this_frame, AARCH64_FP_REGNUM);
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CORE_ADDR sigcontext_addr =
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sp
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+ AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
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+ AARCH64_UCONTEXT_SIGCONTEXT_OFFSET;
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int i;
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for (i = 0; i < 31; i++)
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{
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trad_frame_set_reg_addr (this_cache,
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AARCH64_X0_REGNUM + i,
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sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
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+ i * AARCH64_SIGCONTEXT_REG_SIZE);
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}
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trad_frame_set_reg_addr (this_cache, AARCH64_FP_REGNUM, fp);
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trad_frame_set_reg_addr (this_cache, AARCH64_LR_REGNUM, fp + 8);
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trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM, fp + 8);
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trad_frame_set_id (this_cache, frame_id_build (fp, func));
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}
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static const struct tramp_frame aarch64_linux_rt_sigframe =
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{
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SIGTRAMP_FRAME,
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4,
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{
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/* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
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Soo1 0010 1hhi iiii iiii iiii iiir rrrr */
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{0xd2801168, -1},
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/* svc 0x0 (o=0, l=1)
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1101 0100 oooi iiii iiii iiii iii0 00ll */
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{0xd4000001, -1},
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{TRAMP_SENTINEL_INSN, -1}
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},
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aarch64_linux_sigframe_init
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};
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/* Fill GDB's register array with the general-purpose register values
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in the buffer pointed by GREGS_BUF. */
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void
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aarch64_linux_supply_gregset (struct regcache *regcache,
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const gdb_byte *gregs_buf)
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{
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int regno;
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for (regno = AARCH64_X0_REGNUM; regno <= AARCH64_CPSR_REGNUM; regno++)
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regcache_raw_supply (regcache, regno,
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gregs_buf + X_REGISTER_SIZE
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* (regno - AARCH64_X0_REGNUM));
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}
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/* The "supply_regset" function for the general-purpose register set. */
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static void
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supply_gregset_from_core (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *regbuf, size_t len)
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{
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aarch64_linux_supply_gregset (regcache, (const gdb_byte *) regbuf);
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}
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/* Fill GDB's register array with the floating-point register values
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in the buffer pointed by FPREGS_BUF. */
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void
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aarch64_linux_supply_fpregset (struct regcache *regcache,
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const gdb_byte *fpregs_buf)
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{
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int regno;
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for (regno = AARCH64_V0_REGNUM; regno <= AARCH64_V31_REGNUM; regno++)
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regcache_raw_supply (regcache, regno,
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fpregs_buf + V_REGISTER_SIZE
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* (regno - AARCH64_V0_REGNUM));
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regcache_raw_supply (regcache, AARCH64_FPSR_REGNUM,
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fpregs_buf + V_REGISTER_SIZE * 32);
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regcache_raw_supply (regcache, AARCH64_FPCR_REGNUM,
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fpregs_buf + V_REGISTER_SIZE * 32 + 4);
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}
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/* The "supply_regset" function for the floating-point register set. */
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static void
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supply_fpregset_from_core (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *regbuf, size_t len)
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{
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aarch64_linux_supply_fpregset (regcache, (const gdb_byte *) regbuf);
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}
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/* Implement the "regset_from_core_section" gdbarch method. */
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static const struct regset *
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aarch64_linux_regset_from_core_section (struct gdbarch *gdbarch,
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const char *sect_name,
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size_t sect_size)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (strcmp (sect_name, ".reg") == 0
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&& sect_size == AARCH64_LINUX_SIZEOF_GREGSET)
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{
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if (tdep->gregset == NULL)
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tdep->gregset = regset_alloc (gdbarch, supply_gregset_from_core,
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NULL);
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return tdep->gregset;
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}
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if (strcmp (sect_name, ".reg2") == 0
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&& sect_size == AARCH64_LINUX_SIZEOF_FPREGSET)
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{
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if (tdep->fpregset == NULL)
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tdep->fpregset = regset_alloc (gdbarch, supply_fpregset_from_core,
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NULL);
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return tdep->fpregset;
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}
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return NULL;
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}
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static void
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aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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tdep->lowest_pc = 0x8000;
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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svr4_lp64_fetch_link_map_offsets);
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/* Shared library handling. */
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set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
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set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
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tramp_frame_prepend_unwinder (gdbarch, &aarch64_linux_rt_sigframe);
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/* Enable longjmp. */
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tdep->jb_pc = 11;
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set_gdbarch_regset_from_core_section (gdbarch,
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aarch64_linux_regset_from_core_section);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_aarch64_linux_tdep;
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void
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_initialize_aarch64_linux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_LINUX,
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aarch64_linux_init_abi);
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}
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@ -0,0 +1,26 @@
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/* GNU/Linux on AArch64 target support, prototypes.
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Copyright (C) 2012-2013 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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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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struct regcache;
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extern void aarch64_linux_supply_gregset (struct regcache *regcache,
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const gdb_byte *gregs_buf);
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extern void aarch64_linux_supply_fpregset (struct regcache *regcache,
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const gdb_byte *fpregs_buf);
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@ -82,6 +82,10 @@ struct gdbarch_tdep
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/* And the size of each entry in the buf. */
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size_t jb_elt_size;
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/* Cached core file helpers. */
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struct regset *gregset;
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struct regset *fpregset;
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/* Types for AdvSISD registers. */
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struct type *vnq_type;
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struct type *vnd_type;
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@ -36,6 +36,12 @@ aarch64*-*-elf)
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gdb_target_obs="aarch64-tdep.o"
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;;
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aarch64*-*-linux*)
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# Target: AArch64 linux
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gdb_target_obs="aarch64-tdep.o aarch64-linux-tdep.o \
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glibc-tdep.o linux-tdep.o solib-svr4.o \
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symfile-mem.o"
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;;
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alpha*-*-osf*)
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# Target: Little-endian Alpha running OSF/1
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Reference in New Issue