* Makefile.in (frv-linux-tdep.o): Add dependencies.
* frv-linux-tdep.c: New file. * frv-tdep.c (struct gdbarch_tdep): Add new field ``sigcontext_reg_addr''. (frv_set_sigcontext_reg_addr, frv_sigtramp,frame_cache) (frv_sigtramp_frame_this_id, frv_sigtramp_frame_prev_register) (frv_sigramp_frame_sniffer): New functions. (frv_sigtramp_frame_unwind): New static global. (frv_gdbarch_init): Hook in ABI-specific overrides. Hook up frame sniffers. * frv-tdep.h (frv_set_sigcontext_reg_addr): New function. * config/frv/frv.mt (TDEPFILES): Add frv-linux-tdep.o.
This commit is contained in:
Kevin Buettner
parent
2dc111b3c1
commit
5ecb7103b5
6 changed files with 416 additions and 2 deletions
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@ -1,3 +1,18 @@
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2004-03-15 Kevin Buettner <kevinb@redhat.com>
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* Makefile.in (frv-linux-tdep.o): Add dependencies.
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* frv-linux-tdep.c: New file.
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* frv-tdep.c (struct gdbarch_tdep): Add new field
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``sigcontext_reg_addr''.
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(frv_set_sigcontext_reg_addr, frv_sigtramp,frame_cache)
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(frv_sigtramp_frame_this_id, frv_sigtramp_frame_prev_register)
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(frv_sigramp_frame_sniffer): New functions.
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(frv_sigtramp_frame_unwind): New static global.
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(frv_gdbarch_init): Hook in ABI-specific overrides. Hook up frame
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sniffers.
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* frv-tdep.h (frv_set_sigcontext_reg_addr): New function.
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* config/frv/frv.mt (TDEPFILES): Add frv-linux-tdep.o.
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2004-03-15 Kevin Buettner <kevinb@redhat.com>
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* frv-tdep.c (frv_analyze_prologue): Terminate prologue scan,
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@ -1766,6 +1766,8 @@ frame.o: frame.c $(defs_h) $(frame_h) $(target_h) $(value_h) $(inferior_h) \
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$(command_h) $(gdbcmd_h)
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frame-unwind.o: frame-unwind.c $(defs_h) $(frame_h) $(frame_unwind_h) \
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$(gdb_assert_h) $(dummy_frame_h)
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frv-linux-tdep.o: frv-linux-tdep.c $(defs_h) $(target_h) $(osabi_h) \
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$(elf_bfd_h) $(elf_frv_h) $(frv_tdep_h)
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frv-tdep.o: frv-tdep.c $(defs_h) $(gdb_string_h) $(inferior_h) $(gdbcore_h) \
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$(arch_utils_h) $(regcache_h) $(frame_h) $(frame_unwind_h) \
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$(frame_base_h) $(trad_frame_h) $(dis_asm_h) $(gdb_assert_h) \
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@ -1,5 +1,5 @@
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# Target: Fujitsu FRV processor
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TDEPFILES= frv-tdep.o solib.o solib-frv.o
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TDEPFILES= frv-tdep.o frv-linux-tdep.o solib.o solib-frv.o
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TM_FILE= tm-frv.h
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SIM_OBS = remote-sim.o
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SIM = ../sim/frv/libsim.a
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273
gdb/frv-linux-tdep.c
Normal file
273
gdb/frv-linux-tdep.c
Normal file
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@ -0,0 +1,273 @@
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/* Target-dependent code for GNU/Linux running on the Fujitsu FR-V,
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for GDB.
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Copyright 2004 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "target.h"
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#include "frame.h"
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#include "osabi.h"
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#include "elf-bfd.h"
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#include "elf/frv.h"
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#include "frv-tdep.h"
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/* Define the size (in bytes) of an FR-V instruction. */
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static const int frv_instr_size = 4;
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enum {
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NORMAL_SIGTRAMP = 1,
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RT_SIGTRAMP = 2
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};
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static int
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frv_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
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{
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char buf[frv_instr_size];
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LONGEST instr;
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int retval = 0;
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if (target_read_memory (pc, buf, sizeof buf) != 0)
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return 0;
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instr = extract_unsigned_integer (buf, sizeof buf);
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if (instr == 0x8efc0077) /* setlos #__NR_sigreturn, gr7 */
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retval = NORMAL_SIGTRAMP;
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else if (instr -= 0x8efc00ad) /* setlos #__NR_rt_sigreturn, gr7 */
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retval = RT_SIGTRAMP;
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else
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return 0;
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if (target_read_memory (pc + frv_instr_size, buf, sizeof buf) != 0)
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return 0;
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instr = extract_unsigned_integer (buf, sizeof buf);
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if (instr != 0xc0700000) /* tira gr0, 0 */
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return 0;
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/* If we get this far, we'll return a non-zero value, either
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NORMAL_SIGTRAMP (1) or RT_SIGTRAMP (2). */
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return retval;
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}
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/* Given NEXT_FRAME, "callee" frame of the sigtramp frame that we
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wish to decode, and REGNO, one of the frv register numbers defined
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in frv-tdep.h, return the address of the saved register (corresponding
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to REGNO) in the sigtramp frame. Return -1 if the register is not
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found in the sigtramp frame. The magic numbers in the code below
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were computed by examining the following kernel structs:
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From arch/frvnommu/signal.c:
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struct sigframe
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{
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void (*pretcode)(void);
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int sig;
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struct sigcontext sc;
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unsigned long extramask[_NSIG_WORDS-1];
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uint32_t retcode[2];
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};
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struct rt_sigframe
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{
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void (*pretcode)(void);
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int sig;
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struct siginfo *pinfo;
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void *puc;
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struct siginfo info;
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struct ucontext uc;
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uint32_t retcode[2];
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};
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From include/asm-frvnommu/ucontext.h:
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struct ucontext {
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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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struct sigcontext uc_mcontext;
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sigset_t uc_sigmask;
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};
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From include/asm-frvnommu/sigcontext.h:
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struct sigcontext {
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struct user_context sc_context;
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unsigned long sc_oldmask;
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} __attribute__((aligned(8)));
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From include/asm-frvnommu/registers.h:
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struct user_int_regs
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{
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unsigned long psr;
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unsigned long isr;
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unsigned long ccr;
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unsigned long cccr;
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unsigned long lr;
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unsigned long lcr;
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unsigned long pc;
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unsigned long __status;
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unsigned long syscallno;
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unsigned long orig_gr8;
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unsigned long gner[2];
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unsigned long long iacc[1];
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union {
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unsigned long tbr;
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unsigned long gr[64];
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};
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};
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struct user_fpmedia_regs
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{
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unsigned long fr[64];
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unsigned long fner[2];
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unsigned long msr[2];
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unsigned long acc[8];
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unsigned char accg[8];
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unsigned long fsr[1];
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};
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struct user_context
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{
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struct user_int_regs i;
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struct user_fpmedia_regs f;
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void *extension;
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} __attribute__((aligned(8))); */
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static CORE_ADDR
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frv_linux_sigcontext_reg_addr (struct frame_info *next_frame, int regno,
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CORE_ADDR *sc_addr_cache_ptr)
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{
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CORE_ADDR sc_addr;
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if (sc_addr_cache_ptr && *sc_addr_cache_ptr)
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{
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sc_addr = *sc_addr_cache_ptr;
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}
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else
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{
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CORE_ADDR pc, sp;
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char buf[4];
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int tramp_type;
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pc = frame_pc_unwind (next_frame);
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tramp_type = frv_linux_pc_in_sigtramp (pc, 0);
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frame_unwind_register (next_frame, sp_regnum, buf);
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sp = extract_unsigned_integer (buf, sizeof buf);
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if (tramp_type == NORMAL_SIGTRAMP)
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{
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/* For a normal sigtramp frame, the sigcontext struct starts
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at SP + 8. */
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sc_addr = sp + 8;
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}
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else if (tramp_type == RT_SIGTRAMP)
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{
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/* For a realtime sigtramp frame, SP + 12 contains a pointer
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to the a ucontext struct. The ucontext struct contains
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a sigcontext struct starting 12 bytes in. */
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if (target_read_memory (sp + 12, buf, sizeof buf) != 0)
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{
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warning ("Can't read realtime sigtramp frame.");
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return 0;
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}
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sc_addr = extract_unsigned_integer (buf, sizeof buf);
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sc_addr += 12;
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}
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else
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internal_error (__FILE__, __LINE__, "not a signal trampoline");
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if (sc_addr_cache_ptr)
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*sc_addr_cache_ptr = sc_addr;
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}
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switch (regno)
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{
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case psr_regnum :
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return sc_addr + 0;
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/* sc_addr + 4 has "isr", the Integer Status Register. */
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case ccr_regnum :
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return sc_addr + 8;
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case cccr_regnum :
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return sc_addr + 12;
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case lr_regnum :
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return sc_addr + 16;
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case lcr_regnum :
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return sc_addr + 20;
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case pc_regnum :
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return sc_addr + 24;
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/* sc_addr + 28 is __status, the exception status.
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sc_addr + 32 is syscallno, the syscall number or -1.
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sc_addr + 36 is orig_gr8, the original syscall arg #1.
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sc_addr + 40 is gner[0].
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sc_addr + 44 is gner[1]. */
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case iacc0h_regnum :
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return sc_addr + 48;
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case iacc0l_regnum :
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return sc_addr + 52;
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default :
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if (first_gpr_regnum <= regno && regno <= last_gpr_regnum)
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return sc_addr + 56 + 4 * (regno - first_gpr_regnum);
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else if (first_fpr_regnum <= regno && regno <= last_fpr_regnum)
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return sc_addr + 312 + 4 * (regno - first_fpr_regnum);
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else
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return -1; /* not saved. */
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}
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}
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static void
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frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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/* When the FR-V Linux kernel calls a signal handler, the return
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address points to a bit of code on the stack. This function is
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used to identify this bit of code as a signal trampoline in order
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to support backtracing through calls to signal handlers. */
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set_gdbarch_pc_in_sigtramp (gdbarch, frv_linux_pc_in_sigtramp);
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frv_set_sigcontext_reg_addr (gdbarch, frv_linux_sigcontext_reg_addr);
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}
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static enum gdb_osabi
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frv_linux_elf_osabi_sniffer (bfd *abfd)
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{
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int elf_flags;
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elf_flags = elf_elfheader (abfd)->e_flags;
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/* Assume GNU/Linux if using the FDPIC ABI. If/when another OS shows
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up that uses this ABI, we'll need to start using .note sections
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or some such. */
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if (elf_flags & EF_FRV_FDPIC)
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return GDB_OSABI_LINUX;
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else
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return GDB_OSABI_UNKNOWN;
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}
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|
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_frv_linux_tdep (void);
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void
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_initialize_frv_linux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_frv, 0, GDB_OSABI_LINUX, frv_linux_init_abi);
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gdbarch_register_osabi_sniffer (bfd_arch_frv,
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bfd_target_elf_flavour,
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frv_linux_elf_osabi_sniffer);
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}
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121
gdb/frv-tdep.c
121
gdb/frv-tdep.c
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|
@ -96,6 +96,11 @@ struct gdbarch_tdep
|
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|
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/* Register names. */
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char **register_names;
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|
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/* Given NEXT_FRAME, determine the address of register REGNO saved in
|
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the calling sigtramp frame. */
|
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CORE_ADDR (*sigcontext_reg_addr) (struct frame_info *next_frame, int regno,
|
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CORE_ADDR *);
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};
|
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|
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#define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
|
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|
|
@ -107,6 +112,15 @@ frv_abi (struct gdbarch *gdbarch)
|
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return gdbarch_tdep (gdbarch)->frv_abi;
|
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}
|
||||
|
||||
/* Set sigcontext_reg_addr. */
|
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void
|
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frv_set_sigcontext_reg_addr (struct gdbarch *gdbarch,
|
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CORE_ADDR (*sigcontext_reg_addr)
|
||||
(struct frame_info *, int, CORE_ADDR *))
|
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{
|
||||
gdbarch_tdep (gdbarch)->sigcontext_reg_addr = sigcontext_reg_addr;
|
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}
|
||||
|
||||
/* Fetch the interpreter and executable loadmap addresses (for shared
|
||||
library support) for the FDPIC ABI. Return 0 if successful, -1 if
|
||||
not. (E.g, -1 will be returned if the ABI isn't the FDPIC ABI.) */
|
||||
|
|
@ -1344,6 +1358,101 @@ frv_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
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frame_pc_unwind (next_frame));
|
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}
|
||||
|
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/* Signal trampolines. */
|
||||
|
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static struct frv_unwind_cache *
|
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frv_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache)
|
||||
{
|
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struct frv_unwind_cache *cache;
|
||||
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
|
||||
CORE_ADDR addr;
|
||||
char buf[4];
|
||||
int regno;
|
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CORE_ADDR sc_addr_cache_val = 0;
|
||||
|
||||
if (*this_cache)
|
||||
return *this_cache;
|
||||
|
||||
cache = FRAME_OBSTACK_ZALLOC (struct frv_unwind_cache);
|
||||
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
|
||||
|
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frame_unwind_register (next_frame, sp_regnum, buf);
|
||||
cache->base = extract_unsigned_integer (buf, sizeof buf);
|
||||
|
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for (regno = 0; regno < frv_num_regs; regno++)
|
||||
{
|
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cache->saved_regs[regno].addr
|
||||
= tdep->sigcontext_reg_addr (next_frame, regno, &sc_addr_cache_val);
|
||||
}
|
||||
|
||||
|
||||
if (cache->saved_regs[sp_regnum].addr != -1
|
||||
&& target_read_memory (cache->saved_regs[sp_regnum].addr,
|
||||
buf, sizeof buf) == 0)
|
||||
{
|
||||
cache->prev_sp = extract_unsigned_integer (buf, sizeof buf);
|
||||
|
||||
/* Now that we've bothered to read it out of memory, save the
|
||||
prev frame's SP value in the cache. */
|
||||
trad_frame_set_value (cache->saved_regs, sp_regnum, cache->prev_sp);
|
||||
}
|
||||
else
|
||||
{
|
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warning ("Can't read SP value from sigtramp frame");
|
||||
}
|
||||
|
||||
*this_cache = cache;
|
||||
return cache;
|
||||
}
|
||||
|
||||
static void
|
||||
frv_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
|
||||
struct frame_id *this_id)
|
||||
{
|
||||
struct frv_unwind_cache *cache =
|
||||
frv_sigtramp_frame_cache (next_frame, this_cache);
|
||||
|
||||
(*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame));
|
||||
}
|
||||
|
||||
static void
|
||||
frv_sigtramp_frame_prev_register (struct frame_info *next_frame,
|
||||
void **this_cache,
|
||||
int regnum, int *optimizedp,
|
||||
enum lval_type *lvalp, CORE_ADDR *addrp,
|
||||
int *realnump, void *valuep)
|
||||
{
|
||||
/* Make sure we've initialized the cache. */
|
||||
frv_sigtramp_frame_cache (next_frame, this_cache);
|
||||
|
||||
frv_frame_prev_register (next_frame, this_cache, regnum,
|
||||
optimizedp, lvalp, addrp, realnump, valuep);
|
||||
}
|
||||
|
||||
static const struct frame_unwind frv_sigtramp_frame_unwind =
|
||||
{
|
||||
SIGTRAMP_FRAME,
|
||||
frv_sigtramp_frame_this_id,
|
||||
frv_sigtramp_frame_prev_register
|
||||
};
|
||||
|
||||
static const struct frame_unwind *
|
||||
frv_sigtramp_frame_sniffer (struct frame_info *next_frame)
|
||||
{
|
||||
CORE_ADDR pc = frame_pc_unwind (next_frame);
|
||||
char *name;
|
||||
|
||||
/* We shouldn't even bother to try if the OSABI didn't register
|
||||
a sigcontext_reg_addr handler. */
|
||||
if (!gdbarch_tdep (current_gdbarch)->sigcontext_reg_addr)
|
||||
return NULL;
|
||||
|
||||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||||
if (PC_IN_SIGTRAMP (pc, name))
|
||||
return &frv_sigtramp_frame_unwind;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct gdbarch *
|
||||
frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
||||
|
|
@ -1434,8 +1543,9 @@ frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|||
set_gdbarch_unwind_pc (gdbarch, frv_unwind_pc);
|
||||
set_gdbarch_unwind_sp (gdbarch, frv_unwind_sp);
|
||||
set_gdbarch_frame_align (gdbarch, frv_frame_align);
|
||||
frame_unwind_append_sniffer (gdbarch, frv_frame_sniffer);
|
||||
frame_base_set_default (gdbarch, &frv_frame_base);
|
||||
/* We set the sniffer lower down after the OSABI hooks have been
|
||||
established. */
|
||||
|
||||
/* Settings for calling functions in the inferior. */
|
||||
set_gdbarch_push_dummy_call (gdbarch, frv_push_dummy_call);
|
||||
|
|
@ -1480,6 +1590,15 @@ frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|||
set_gdbarch_convert_from_func_ptr_addr (gdbarch,
|
||||
frv_convert_from_func_ptr_addr);
|
||||
|
||||
/* Hook in ABI-specific overrides, if they have been registered. */
|
||||
gdbarch_init_osabi (info, gdbarch);
|
||||
|
||||
/* Set the sigtramp frame sniffer. */
|
||||
frame_unwind_append_sniffer (gdbarch, frv_sigtramp_frame_sniffer);
|
||||
|
||||
/* Set the fallback (prologue based) frame sniffer. */
|
||||
frame_unwind_append_sniffer (gdbarch, frv_frame_sniffer);
|
||||
|
||||
return gdbarch;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -84,6 +84,11 @@ enum {
|
|||
/* Return the FR-V ABI associated with GDBARCH. */
|
||||
enum frv_abi frv_abi (struct gdbarch *gdbarch);
|
||||
|
||||
/* Associate a sigcontext address fetcher with GDBARCH. */
|
||||
void frv_set_sigcontext_reg_addr (struct gdbarch *gdbarch,
|
||||
CORE_ADDR (*sigcontext_reg_addr)
|
||||
(struct frame_info *, int, CORE_ADDR *));
|
||||
|
||||
/* Fetch the interpreter and executable loadmap addresses (for shared
|
||||
library support) for the FDPIC ABI. Return 0 if successful, -1 if
|
||||
not. (E.g, -1 will be returned if the ABI isn't the FDPIC ABI.) */
|
||||
|
|
|
|||
Loading…
Reference in a new issue