2004-03-15 20:42:25 +01:00
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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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2004-05-01 16:00:57 +02:00
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#include "trad-frame.h"
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#include "frame-unwind.h"
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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/* Given NEXT_FRAME, the "callee" frame of the sigtramp frame that we
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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From arch/frv/kernel/signal.c:
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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From include/asm-frv/ucontext.h:
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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From include/asm-frv/signal.h:
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typedef struct sigaltstack {
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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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From include/asm-frv/sigcontext.h:
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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From include/asm-frv/registers.h:
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2004-03-15 20:42:25 +01:00
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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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2004-05-01 16:00:57 +02:00
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static LONGEST
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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to the a ucontext struct. The ucontext struct contains a
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sigcontext struct starting 24 bytes in. (The offset of
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uc_mcontext within struct ucontext is derived as follows:
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stack_t is a 12-byte struct and struct sigcontext is
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8-byte aligned. This gives an offset of 8 + 12 + 4 (for
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padding) = 24.) */
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2004-03-15 20:42:25 +01:00
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if (target_read_memory (sp + 12, buf, sizeof buf) != 0)
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{
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2005-02-10 Andrew Cagney <cagney@gnu.org>
Mark up all error and warning messages.
* ada-lang.c, amd64-tdep.c, arch-utils.c, breakpoint.c: Update.
* bsd-kvm.c, bsd-uthread.c, coff-solib.h, coffread.c: Update.
* core-aout.c, core-regset.c, corefile.c, corelow.c: Update.
* cp-abi.c, cp-support.c, cp-valprint.c, cris-tdep.c: Update.
* dbxread.c, demangle.c, doublest.c, dsrec.c: Update.
* dve3900-rom.c, dwarf2expr.c, dwarf2loc.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, eval.c: Update.
* event-top.c, exec.c, expprint.c, f-lang.c: Update.
* f-typeprint.c, f-valprint.c, fbsd-nat.c, findvar.c: Update.
* frame.c, frv-linux-tdep.c, gcore.c, gdbtypes.c: Update.
* gnu-nat.c, gnu-v2-abi.c, gnu-v3-abi.c, go32-nat.c: Update.
* hpacc-abi.c, hppa-hpux-nat.c, hppa-hpux-tdep.c: Update.
* hppa-linux-nat.c, hppa-linux-tdep.c, hppa-tdep.c: Update.
* hpread.c, hpux-thread.c, i386-linux-nat.c: Update.
* i386-linux-tdep.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386gnu-nat.c, i387-tdep.c, ia64-linux-nat.c: Update.
* ia64-tdep.c, inf-child.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcall.c, infcmd.c, inflow.c, infptrace.c, infrun.c: Update.
* inftarg.c, interps.c, irix5-nat.c, jv-lang.c: Update.
* kod-cisco.c, kod.c, language.c, libunwind-frame.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, m2-lang.c: Update.
* m32r-rom.c, m68hc11-tdep.c, m68k-tdep.c: Update.
* m68klinux-nat.c, macrocmd.c, macroexp.c, main.c: Update.
* maint.c, mdebugread.c, mem-break.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mipsread.c, monitor.c: Update.
* nlmread.c, nto-procfs.c, objc-lang.c, objfiles.c: Update.
* observer.c, ocd.c, p-lang.c, p-typeprint.c: Update.
* p-valprint.c, pa64solib.c, parse.c, ppc-linux-tdep.c: Update.
* ppcnbsd-tdep.c, printcmd.c, procfs.c, remote-e7000.c: Update.
* remote-fileio.c, remote-m32r-sdi.c, remote-rdi.c: Update.
* remote-rdp.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote-utils.h, remote.c: Update.
* rom68k-rom.c, rs6000-nat.c, s390-tdep.c, scm-lang.c: Update.
* ser-e7kpc.c, ser-tcp.c, ser-unix.c, sh-tdep.c: Update.
* sh3-rom.c, shnbsd-tdep.c, sol-thread.c, solib-aix5.c: Update.
* solib-frv.c, solib-irix.c, solib-osf.c, solib-pa64.c: Update.
* solib-som.c, solib-sunos.c, solib-svr4.c, solib.c: Update.
* somread.c, somsolib.c, source.c, stabsread.c: Update.
* stack.c, std-regs.c, symfile-mem.c, symfile.c: Update.
* symmisc.c, symtab.c, target.c, thread.c, top.c: Update.
* tracepoint.c, trad-frame.c, typeprint.c, utils.c: Update.
* uw-thread.c, valarith.c, valops.c, valprint.c: Update.
* value.c, varobj.c, version.in, win32-nat.c, wince.c: Update.
* xcoffread.c, xcoffsolib.c, cli/cli-cmds.c: Update.
* cli/cli-decode.c, cli/cli-dump.c, cli/cli-logging.c: Update.
* cli/cli-script.c, cli/cli-setshow.c, mi/mi-cmd-break.c: Update.
* mi/mi-cmd-disas.c, mi/mi-cmd-env.c, mi/mi-cmd-file.c: Update.
* mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-getopt.c: Update.
* mi/mi-symbol-cmds.c, tui/tui-layout.c, tui/tui-stack.c: Update.
* tui/tui-win.c: Update.
2005-02-11 05:06:14 +01:00
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warning (_("Can't read realtime sigtramp frame."));
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2004-03-15 20:42:25 +01:00
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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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2005-03-18 21:23:28 +01:00
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sc_addr += 24;
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2004-03-15 20:42:25 +01:00
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}
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else
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2005-02-11 Andrew Cagney <cagney@gnu.org>
Mark up error_no_arg, query, perror_with_name, complaint, and
internal_error.
* breakpoint.c, cp-abi.c, cp-namespace.c, cp-support.c: Update.
* cris-tdep.c, dbxread.c, dictionary.c, dsrec.c: Update.
* dummy-frame.c, dve3900-rom.c, dwarf2-frame.c, dwarf2expr.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, event-loop.c: Update.
* exceptions.c, exec.c, f-lang.c, findvar.c, fork-child.c: Update.
* frame-unwind.c, frame.c, frv-linux-tdep.c, frv-tdep.c: Update.
* gdb_assert.h, gdbarch.c, gdbtypes.c, gnu-nat.c: Update.
* go32-nat.c, hppa-tdep.c, hppabsd-nat.c, hpread.c: Update.
* i386-linux-nat.c, i386-nat.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386fbsd-nat.c, inf-ptrace.c, inf-ttrace.c, infcall.c: Update.
* infcmd.c, inflow.c, infptrace.c, infrun.c, inftarg.c: Update.
* interps.c, language.c, linespec.c, linux-nat.c: Update.
* m32r-linux-nat.c, m68k-tdep.c, m68kbsd-nat.c: Update.
* m68klinux-nat.c, m88kbsd-nat.c, macroexp.c, macroscope.c: Update.
* macrotab.c, maint.c, mdebugread.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mips64obsd-nat.c: Update.
* mipsnbsd-nat.c, mn10300-tdep.c, monitor.c, nto-procfs.c: Update.
* objc-lang.c, objfiles.c, objfiles.h, ocd.c, osabi.c: Update.
* parse.c, ppc-bdm.c, ppc-linux-nat.c, ppc-sysv-tdep.c: Update.
* ppcnbsd-nat.c, ppcobsd-nat.c, printcmd.c, procfs.c: Update.
* regcache.c, reggroups.c, remote-e7000.c, remote-mips.c: Update.
* remote-rdp.c, remote-sds.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote.c, rs6000-nat.c, rs6000-tdep.c: Update.
* s390-nat.c, s390-tdep.c, sentinel-frame.c, serial.c: Update.
* sh-tdep.c, sh3-rom.c, sh64-tdep.c, shnbsd-nat.c: Update.
* solib-aix5.c, solib-svr4.c, solib.c, source.c: Update.
* sparc-nat.c, stabsread.c, stack.c, symfile.c, symtab.c: Update.
* symtab.h, target.c, tracepoint.c, ui-file.c, ui-out.c: Update.
* utils.c, valops.c, valprint.c, vax-nat.c, vaxbsd-nat.c: Update.
* win32-nat.c, xcoffread.c, xstormy16-tdep.c: Update.
* cli/cli-cmds.c, cli/cli-logging.c, cli/cli-script.c: Update.
* cli/cli-setshow.c, mi/mi-cmd-break.c, mi/mi-cmds.c: Update.
* mi/mi-console.c, mi/mi-getopt.c, mi/mi-out.c: Update.
* tui/tui-file.c, tui/tui-interp.c: Update.
2005-02-11 19:13:55 +01:00
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internal_error (__FILE__, __LINE__, _("not a signal trampoline"));
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2004-03-15 20:42:25 +01:00
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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);
|
|
|
|
else
|
|
|
|
return -1; /* not saved. */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-05-01 16:00:57 +02:00
|
|
|
/* Signal trampolines. */
|
|
|
|
|
|
|
|
static struct trad_frame_cache *
|
|
|
|
frv_linux_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache)
|
|
|
|
{
|
|
|
|
struct trad_frame_cache *cache;
|
|
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
|
|
|
|
CORE_ADDR addr;
|
|
|
|
char buf[4];
|
|
|
|
int regnum;
|
|
|
|
CORE_ADDR sc_addr_cache_val = 0;
|
|
|
|
struct frame_id this_id;
|
|
|
|
|
|
|
|
if (*this_cache)
|
|
|
|
return *this_cache;
|
|
|
|
|
|
|
|
cache = trad_frame_cache_zalloc (next_frame);
|
|
|
|
|
|
|
|
/* FIXME: cagney/2004-05-01: This is is long standing broken code.
|
|
|
|
The frame ID's code address should be the start-address of the
|
|
|
|
signal trampoline and not the current PC within that
|
|
|
|
trampoline. */
|
|
|
|
frame_unwind_register (next_frame, sp_regnum, buf);
|
|
|
|
this_id = frame_id_build (extract_unsigned_integer (buf, sizeof buf),
|
|
|
|
frame_pc_unwind (next_frame));
|
|
|
|
trad_frame_set_id (cache, this_id);
|
|
|
|
|
|
|
|
for (regnum = 0; regnum < frv_num_regs; regnum++)
|
|
|
|
{
|
|
|
|
LONGEST reg_addr = frv_linux_sigcontext_reg_addr (next_frame, regnum,
|
|
|
|
&sc_addr_cache_val);
|
|
|
|
if (reg_addr != -1)
|
|
|
|
trad_frame_set_reg_addr (cache, regnum, reg_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
*this_cache = cache;
|
|
|
|
return cache;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
frv_linux_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
|
|
|
|
struct frame_id *this_id)
|
|
|
|
{
|
|
|
|
struct trad_frame_cache *cache =
|
|
|
|
frv_linux_sigtramp_frame_cache (next_frame, this_cache);
|
|
|
|
trad_frame_get_id (cache, this_id);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
frv_linux_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. */
|
|
|
|
struct trad_frame_cache *cache =
|
|
|
|
frv_linux_sigtramp_frame_cache (next_frame, this_cache);
|
|
|
|
trad_frame_get_register (cache, next_frame, regnum, optimizedp, lvalp,
|
|
|
|
addrp, realnump, valuep);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct frame_unwind frv_linux_sigtramp_frame_unwind =
|
|
|
|
{
|
|
|
|
SIGTRAMP_FRAME,
|
|
|
|
frv_linux_sigtramp_frame_this_id,
|
|
|
|
frv_linux_sigtramp_frame_prev_register
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct frame_unwind *
|
|
|
|
frv_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
|
|
|
|
{
|
|
|
|
CORE_ADDR pc = frame_pc_unwind (next_frame);
|
|
|
|
char *name;
|
|
|
|
|
|
|
|
find_pc_partial_function (pc, &name, NULL, NULL);
|
|
|
|
if (frv_linux_pc_in_sigtramp (pc, name))
|
|
|
|
return &frv_linux_sigtramp_frame_unwind;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2004-03-15 20:42:25 +01:00
|
|
|
static void
|
|
|
|
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
|
|
{
|
2004-05-01 16:00:57 +02:00
|
|
|
/* Set the sigtramp frame sniffer. */
|
|
|
|
frame_unwind_append_sniffer (gdbarch, frv_linux_sigtramp_frame_sniffer);
|
2004-03-15 20:42:25 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static enum gdb_osabi
|
|
|
|
frv_linux_elf_osabi_sniffer (bfd *abfd)
|
|
|
|
{
|
|
|
|
int elf_flags;
|
|
|
|
|
|
|
|
elf_flags = elf_elfheader (abfd)->e_flags;
|
|
|
|
|
|
|
|
/* Assume GNU/Linux if using the FDPIC ABI. If/when another OS shows
|
|
|
|
up that uses this ABI, we'll need to start using .note sections
|
|
|
|
or some such. */
|
|
|
|
if (elf_flags & EF_FRV_FDPIC)
|
|
|
|
return GDB_OSABI_LINUX;
|
|
|
|
else
|
|
|
|
return GDB_OSABI_UNKNOWN;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
|
|
void _initialize_frv_linux_tdep (void);
|
|
|
|
|
|
|
|
void
|
|
|
|
_initialize_frv_linux_tdep (void)
|
|
|
|
{
|
|
|
|
gdbarch_register_osabi (bfd_arch_frv, 0, GDB_OSABI_LINUX, frv_linux_init_abi);
|
|
|
|
gdbarch_register_osabi_sniffer (bfd_arch_frv,
|
|
|
|
bfd_target_elf_flavour,
|
|
|
|
frv_linux_elf_osabi_sniffer);
|
|
|
|
}
|