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darling-gdb/gdb/frv-linux-tdep.c
Eli Zaretskii 197e01b6dc * breakpoint.c: 
* arm-tdep.c:
	* ia64-tdep.c:
	* i386-tdep.c:
	* hpread.c:
	* hppa-tdep.c:
	* hppa-hpux-tdep.c:
	* gnu-nat.c:
	* gdbtypes.c:
	* gdbarch.h:
	* gdbarch.c:
	* eval.c:
	* dwarf2read.c:
	* dbxread.c:
	* copying:
	* symfile.c:
	* stabsread.c:
	* sh64-tdep.c:
	* sh-tdep.c:
	* s390-tdep.c:
	* rs6000-tdep.c:
	* remote.c:
	* remote-mips.c:
	* mips-tdep.c:
	* mdebugread.c:
	* linux-nat.c:
	* infrun.c:
	* xcoffread.c:
	* win32-nat.c:
	* valops.c:
	* utils.c:
	* tracepoint.c:
	* target.c:
	* symtab.c:
	* c-exp.y:
	* ada-valprint.c:
	* ada-typeprint.c:
	* ada-lex.l:
	* ada-lang.h:
	* ada-lang.c:
	* ada-exp.y:
	* alphafbsd-tdep.c:
	* alphabsd-tdep.h:
	* alphabsd-tdep.c:
	* alphabsd-nat.c:
	* alpha-tdep.h:
	* alpha-tdep.c:
	* alpha-osf1-tdep.c:
	* alpha-nat.c:
	* alpha-mdebug-tdep.c:
	* alpha-linux-tdep.c:
	* alpha-linux-nat.c:
	* aix-thread.c:
	* abug-rom.c:
	* arch-utils.c:
	* annotate.h:
	* annotate.c:
	* amd64obsd-tdep.c:
	* amd64obsd-nat.c:
	* amd64nbsd-tdep.c:
	* amd64nbsd-nat.c:
	* amd64fbsd-tdep.c:
	* amd64fbsd-nat.c:
	* amd64bsd-nat.c:
	* amd64-tdep.h:
	* amd64-tdep.c:
	* amd64-sol2-tdep.c:
	* amd64-nat.h:
	* amd64-nat.c:
	* amd64-linux-tdep.c:
	* amd64-linux-nat.c:
	* alphanbsd-tdep.c:
	* block.h:
	* block.c:
	* bfd-target.h:
	* bfd-target.c:
	* bcache.h:
	* bcache.c:
	* ax.h:
	* ax-general.c:
	* ax-gdb.h:
	* ax-gdb.c:
	* avr-tdep.c:
	* auxv.h:
	* auxv.c:
	* armnbsd-tdep.c:
	* armnbsd-nat.c:
	* arm-tdep.h:
	* arm-linux-nat.c:
	* arch-utils.h:
	* charset.c:
	* call-cmds.h:
	* c-valprint.c:
	* c-typeprint.c:
	* c-lang.h:
	* c-lang.c:
	* buildsym.h:
	* buildsym.c:
	* bsd-uthread.h:
	* bsd-uthread.c:
	* bsd-kvm.h:
	* bsd-kvm.c:
	* breakpoint.h:
	* core-regset.c:
	* core-aout.c:
	* completer.h:
	* completer.c:
	* complaints.h:
	* complaints.c:
	* command.h:
	* coffread.c:
	* coff-solib.h:
	* coff-solib.c:
	* coff-pe-read.h:
	* coff-pe-read.c:
	* cli-out.h:
	* cli-out.c:
	* charset.h:
	* dink32-rom.c:
	* dictionary.h:
	* dictionary.c:
	* demangle.c:
	* defs.h:
	* dcache.h:
	* dcache.c:
	* d10v-tdep.c:
	* cpu32bug-rom.c:
	* cp-valprint.c:
	* cp-support.h:
	* cp-support.c:
	* cp-namespace.c:
	* cp-abi.h:
	* cp-abi.c:
	* corelow.c:
	* corefile.c:
	* environ.c:
	* elfread.c:
	* dwarfread.c:
	* dwarf2loc.c:
	* dwarf2expr.h:
	* dwarf2expr.c:
	* dwarf2-frame.h:
	* dwarf2-frame.c:
	* dve3900-rom.c:
	* dummy-frame.h:
	* dummy-frame.c:
	* dsrec.c:
	* doublest.h:
	* doublest.c:
	* disasm.h:
	* disasm.c:
	* fork-child.c:
	* findvar.c:
	* fbsd-nat.h:
	* fbsd-nat.c:
	* f-valprint.c:
	* f-typeprint.c:
	* f-lang.h:
	* f-lang.c:
	* expression.h:
	* expprint.c:
	* exec.h:
	* exec.c:
	* exceptions.h:
	* exceptions.c:
	* event-top.h:
	* event-top.c:
	* event-loop.h:
	* event-loop.c:
	* gdb.c:
	* gdb-stabs.h:
	* gdb-events.h:
	* gdb-events.c:
	* gcore.c:
	* frv-tdep.h:
	* frv-tdep.c:
	* frv-linux-tdep.c:
	* frame.h:
	* frame.c:
	* frame-unwind.h:
	* frame-unwind.c:
	* frame-base.h:
	* frame-base.c:
	* gdb_vfork.h:
	* gdb_thread_db.h:
	* gdb_string.h:
	* gdb_stat.h:
	* gdb_regex.h:
	* gdb_ptrace.h:
	* gdb_proc_service.h:
	* gdb_obstack.h:
	* gdb_locale.h:
	* gdb_dirent.h:
	* gdb_curses.h:
	* gdb_assert.h:
	* gdbarch.sh:
	* gdb.h:
	* hpux-thread.c:
	* hppabsd-nat.c:
	* hppa-tdep.h:
	* hpacc-abi.c:
	* h8300-tdep.c:
	* gregset.h:
	* go32-nat.c:
	* gnu-v3-abi.c:
	* gnu-v2-abi.h:
	* gnu-v2-abi.c:
	* gnu-nat.h:
	* glibc-tdep.c:
	* gdbtypes.h:
	* gdbcore.h:
	* gdbcmd.h:
	* i386nbsd-tdep.c:
	* i386nbsd-nat.c:
	* i386gnu-tdep.c:
	* i386gnu-nat.c:
	* i386fbsd-tdep.c:
	* i386fbsd-nat.c:
	* i386bsd-tdep.c:
	* i386bsd-nat.h:
	* i386bsd-nat.c:
	* i386-tdep.h:
	* i386-sol2-nat.c:
	* i386-nto-tdep.c:
	* i386-nat.c:
	* i386-linux-tdep.h:
	* i386-linux-tdep.c:
	* i386-linux-nat.c:
	* i386-cygwin-tdep.c:
	* inf-ttrace.c:
	* inf-ptrace.h:
	* inf-ptrace.c:
	* inf-loop.h:
	* inf-loop.c:
	* inf-child.h:
	* inf-child.c:
	* ia64-tdep.h:
	* ia64-linux-nat.c:
	* i387-tdep.h:
	* i387-tdep.c:
	* i386v4-nat.c:
	* i386v-nat.c:
	* i386obsd-tdep.c:
	* i386obsd-nat.c:
	* kod.c:
	* jv-valprint.c:
	* jv-typeprint.c:
	* jv-lang.h:
	* jv-lang.c:
	* irix5-nat.c:
	* iq2000-tdep.c:
	* interps.h:
	* interps.c:
	* inftarg.c:
	* inflow.h:
	* inflow.c:
	* inferior.h:
	* infcmd.c:
	* infcall.h:
	* infcall.c:
	* inf-ttrace.h:
	* m32r-tdep.h:
	* m32r-tdep.c:
	* m32r-rom.c:
	* m32r-linux-tdep.c:
	* m32r-linux-nat.c:
	* m2-valprint.c:
	* m2-typeprint.c:
	* m2-lang.h:
	* m2-lang.c:
	* lynx-nat.c:
	* linux-thread-db.c:
	* linux-nat.h:
	* linespec.c:
	* libunwind-frame.h:
	* libunwind-frame.c:
	* language.h:
	* language.c:
	* macroexp.c:
	* macrocmd.c:
	* m88kbsd-nat.c:
	* m88k-tdep.h:
	* m88k-tdep.c:
	* m68klinux-tdep.c:
	* m68klinux-nat.c:
	* m68kbsd-tdep.c:
	* m68kbsd-nat.c:
	* m68k-tdep.h:
	* m68k-tdep.c:
	* mips-linux-nat.c:
	* mips-irix-tdep.c:
	* minsyms.c:
	* memattr.h:
	* memattr.c:
	* mem-break.c:
	* mdebugread.h:
	* main.h:
	* main.c:
	* macrotab.h:
	* macrotab.c:
	* macroscope.h:
	* macroscope.c:
	* macroexp.h:
	* nbsd-tdep.c:
	* mt-tdep.c:
	* monitor.h:
	* monitor.c:
	* mn10300-tdep.h:
	* mn10300-tdep.c:
	* mn10300-linux-tdep.c:
	* mipsv4-nat.c:
	* mipsread.c:
	* mipsnbsd-tdep.h:
	* mipsnbsd-tdep.c:
	* mipsnbsd-nat.c:
	* mips64obsd-tdep.c:
	* mips64obsd-nat.c:
	* mips-tdep.h:
	* mips-mdebug-tdep.c:
	* mips-linux-tdep.c:
	* osabi.h:
	* osabi.c:
	* ocd.h:
	* ocd.c:
	* observer.c:
	* objfiles.h:
	* objfiles.c:
	* objc-lang.h:
	* objc-lang.c:
	* objc-exp.y:
	* nto-tdep.h:
	* nto-tdep.c:
	* nto-procfs.c:
	* nlmread.c:
	* nbsd-tdep.h:
	* ppcobsd-tdep.c:
	* ppcobsd-nat.c:
	* ppcnbsd-tdep.h:
	* ppcnbsd-tdep.c:
	* ppcnbsd-nat.c:
	* ppcbug-rom.c:
	* ppc-tdep.h:
	* ppc-sysv-tdep.c:
	* ppc-linux-tdep.c:
	* ppc-linux-nat.c:
	* ppc-bdm.c:
	* parser-defs.h:
	* parse.c:
	* p-valprint.c:
	* p-typeprint.c:
	* p-lang.h:
	* p-lang.c:
	* remote-fileio.h:
	* remote-fileio.c:
	* remote-est.c:
	* remote-e7000.c:
	* regset.h:
	* regset.c:
	* reggroups.h:
	* reggroups.c:
	* regcache.h:
	* regcache.c:
	* proc-why.c:
	* proc-service.c:
	* proc-events.c:
	* printcmd.c:
	* ppcobsd-tdep.h:
	* sentinel-frame.h:
	* sentinel-frame.c:
	* scm-valprint.c:
	* scm-tags.h:
	* scm-lang.h:
	* scm-lang.c:
	* scm-exp.c:
	* s390-tdep.h:
	* rom68k-rom.c:
	* remote.h:
	* remote-utils.c:
	* remote-st.c:
	* remote-sim.c:
	* remote-sds.c:
	* remote-rdp.c:
	* remote-rdi.c:
	* remote-hms.c:
	* sim-regno.h:
	* shnbsd-tdep.h:
	* shnbsd-tdep.c:
	* shnbsd-nat.c:
	* sh-tdep.h:
	* serial.h:
	* serial.c:
	* ser-unix.h:
	* ser-unix.c:
	* ser-tcp.c:
	* ser-pipe.c:
	* ser-go32.c:
	* ser-e7kpc.c:
	* ser-base.h:
	* ser-base.c:
	* solib.c:
	* solib-svr4.h:
	* solib-svr4.c:
	* solib-sunos.c:
	* solib-som.h:
	* solib-som.c:
	* solib-pa64.h:
	* solib-pa64.c:
	* solib-osf.c:
	* solib-null.c:
	* solib-legacy.c:
	* solib-irix.c:
	* solib-frv.c:
	* solib-aix5.c:
	* sol-thread.c:
	* sparc64-linux-tdep.c:
	* sparc64-linux-nat.c:
	* sparc-tdep.h:
	* sparc-tdep.c:
	* sparc-sol2-tdep.c:
	* sparc-sol2-nat.c:
	* sparc-nat.h:
	* sparc-nat.c:
	* sparc-linux-tdep.c:
	* sparc-linux-nat.c:
	* source.h:
	* source.c:
	* somread.c:
	* solist.h:
	* solib.h:
	* std-regs.c:
	* stack.h:
	* stack.c:
	* stabsread.h:
	* sparcobsd-tdep.c:
	* sparcnbsd-tdep.c:
	* sparcnbsd-nat.c:
	* sparc64obsd-tdep.c:
	* sparc64nbsd-tdep.c:
	* sparc64nbsd-nat.c:
	* sparc64fbsd-tdep.c:
	* sparc64fbsd-nat.c:
	* sparc64-tdep.h:
	* sparc64-tdep.c:
	* sparc64-sol2-tdep.c:
	* sparc64-nat.c:
	* ui-file.c:
	* typeprint.h:
	* typeprint.c:
	* tramp-frame.h:
	* tramp-frame.c:
	* trad-frame.h:
	* trad-frame.c:
	* tracepoint.h:
	* top.c:
	* tobs.inc:
	* thread.c:
	* terminal.h:
	* target.h:
	* symfile.h:
	* stop-gdb.c:
	* vaxbsd-nat.c:
	* vax-tdep.h:
	* vax-tdep.c:
	* vax-nat.c:
	* varobj.h:
	* varobj.c:
	* value.h:
	* value.c:
	* valprint.h:
	* valprint.c:
	* v850-tdep.c:
	* uw-thread.c:
	* user-regs.c:
	* ui-out.h:
	* ui-out.c:
	* ui-file.h:
	* xcoffsolib.h:
	* xcoffsolib.c:
	* wrapper.c:
	* wince.c:
	* wince-stub.h:
	* wince-stub.c:
	* vaxobsd-tdep.c:
	* vaxnbsd-tdep.c:
	* gdb_gcore.sh:
	* copying.c:
	* configure.ac:
	* aclocal.m4:
	* acinclude.m4:
	* reply_mig_hack.awk:
	* observer.sh:
	* gdb_mbuild.sh:
	* arm-linux-tdep.c:
	* blockframe.c:
	* dbug-rom.c:
	* environ.h:
	* dwarf2loc.h:
	* gdb-events.sh:
	* glibc-tdep.h:
	* gdb_wait.h:
	* gdbthread.h:
	* i386-sol2-tdep.c:
	* hppabsd-tdep.c:
	* hppa-linux-nat.c:
	* hppa-hpux-nat.c:
	* ia64-linux-tdep.c:
	* infptrace.c:
	* linespec.h:
	* maint.c:
	* mips-mdebug-tdep.h:
	* remote-m32r-sdi.c:
	* s390-nat.c:
	* rs6000-nat.c:
	* remote-utils.h:
	* sh3-rom.c:
	* sh-linux-tdep.c:
	* top.h:
	* symtab.h:
	* symmisc.c:
	* symfile-mem.c:
	* srec.h:
	* user-regs.h:
	* version.h:
	* valarith.c:
	* xstormy16-tdep.c:
	* wrapper.h:
	* Makefile.in:
	* f-exp.y:
	* cris-tdep.c:
	* cp-name-parser.y:
	* procfs.c:
	* proc-utils.h:
	* proc-flags.c:
	* proc-api.c:
	* p-exp.y:
	* m68hc11-tdep.c:
	* m2-exp.y:
	* kod.h:
	* kod-cisco.c:
	* jv-exp.y:
	* hppa-linux-tdep.c: Add (c) after Copyright.  Update the FSF
	address.
2005-12-17 22:34:03 +00:00

366 lines
10 KiB
C
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/* Target-dependent code for GNU/Linux running on the Fujitsu FR-V,
for GDB.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "target.h"
#include "frame.h"
#include "osabi.h"
#include "elf-bfd.h"
#include "elf/frv.h"
#include "frv-tdep.h"
#include "trad-frame.h"
#include "frame-unwind.h"
/* Define the size (in bytes) of an FR-V instruction. */
static const int frv_instr_size = 4;
enum {
NORMAL_SIGTRAMP = 1,
RT_SIGTRAMP = 2
};
static int
frv_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
char buf[frv_instr_size];
LONGEST instr;
int retval = 0;
if (target_read_memory (pc, buf, sizeof buf) != 0)
return 0;
instr = extract_unsigned_integer (buf, sizeof buf);
if (instr == 0x8efc0077) /* setlos #__NR_sigreturn, gr7 */
retval = NORMAL_SIGTRAMP;
else if (instr -= 0x8efc00ad) /* setlos #__NR_rt_sigreturn, gr7 */
retval = RT_SIGTRAMP;
else
return 0;
if (target_read_memory (pc + frv_instr_size, buf, sizeof buf) != 0)
return 0;
instr = extract_unsigned_integer (buf, sizeof buf);
if (instr != 0xc0700000) /* tira gr0, 0 */
return 0;
/* If we get this far, we'll return a non-zero value, either
NORMAL_SIGTRAMP (1) or RT_SIGTRAMP (2). */
return retval;
}
/* Given NEXT_FRAME, the "callee" frame of the sigtramp frame that we
wish to decode, and REGNO, one of the frv register numbers defined
in frv-tdep.h, return the address of the saved register (corresponding
to REGNO) in the sigtramp frame. Return -1 if the register is not
found in the sigtramp frame. The magic numbers in the code below
were computed by examining the following kernel structs:
From arch/frv/kernel/signal.c:
struct sigframe
{
void (*pretcode)(void);
int sig;
struct sigcontext sc;
unsigned long extramask[_NSIG_WORDS-1];
uint32_t retcode[2];
};
struct rt_sigframe
{
void (*pretcode)(void);
int sig;
struct siginfo *pinfo;
void *puc;
struct siginfo info;
struct ucontext uc;
uint32_t retcode[2];
};
From include/asm-frv/ucontext.h:
struct ucontext {
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask;
};
From include/asm-frv/signal.h:
typedef struct sigaltstack {
void *ss_sp;
int ss_flags;
size_t ss_size;
} stack_t;
From include/asm-frv/sigcontext.h:
struct sigcontext {
struct user_context sc_context;
unsigned long sc_oldmask;
} __attribute__((aligned(8)));
From include/asm-frv/registers.h:
struct user_int_regs
{
unsigned long psr;
unsigned long isr;
unsigned long ccr;
unsigned long cccr;
unsigned long lr;
unsigned long lcr;
unsigned long pc;
unsigned long __status;
unsigned long syscallno;
unsigned long orig_gr8;
unsigned long gner[2];
unsigned long long iacc[1];
union {
unsigned long tbr;
unsigned long gr[64];
};
};
struct user_fpmedia_regs
{
unsigned long fr[64];
unsigned long fner[2];
unsigned long msr[2];
unsigned long acc[8];
unsigned char accg[8];
unsigned long fsr[1];
};
struct user_context
{
struct user_int_regs i;
struct user_fpmedia_regs f;
void *extension;
} __attribute__((aligned(8))); */
static LONGEST
frv_linux_sigcontext_reg_addr (struct frame_info *next_frame, int regno,
CORE_ADDR *sc_addr_cache_ptr)
{
CORE_ADDR sc_addr;
if (sc_addr_cache_ptr && *sc_addr_cache_ptr)
{
sc_addr = *sc_addr_cache_ptr;
}
else
{
CORE_ADDR pc, sp;
char buf[4];
int tramp_type;
pc = frame_pc_unwind (next_frame);
tramp_type = frv_linux_pc_in_sigtramp (pc, 0);
frame_unwind_register (next_frame, sp_regnum, buf);
sp = extract_unsigned_integer (buf, sizeof buf);
if (tramp_type == NORMAL_SIGTRAMP)
{
/* For a normal sigtramp frame, the sigcontext struct starts
at SP + 8. */
sc_addr = sp + 8;
}
else if (tramp_type == RT_SIGTRAMP)
{
/* For a realtime sigtramp frame, SP + 12 contains a pointer
to a ucontext struct. The ucontext struct contains a
sigcontext struct starting 24 bytes in. (The offset of
uc_mcontext within struct ucontext is derived as follows:
stack_t is a 12-byte struct and struct sigcontext is
8-byte aligned. This gives an offset of 8 + 12 + 4 (for
padding) = 24.) */
if (target_read_memory (sp + 12, buf, sizeof buf) != 0)
{
warning (_("Can't read realtime sigtramp frame."));
return 0;
}
sc_addr = extract_unsigned_integer (buf, sizeof buf);
sc_addr += 24;
}
else
internal_error (__FILE__, __LINE__, _("not a signal trampoline"));
if (sc_addr_cache_ptr)
*sc_addr_cache_ptr = sc_addr;
}
switch (regno)
{
case psr_regnum :
return sc_addr + 0;
/* sc_addr + 4 has "isr", the Integer Status Register. */
case ccr_regnum :
return sc_addr + 8;
case cccr_regnum :
return sc_addr + 12;
case lr_regnum :
return sc_addr + 16;
case lcr_regnum :
return sc_addr + 20;
case pc_regnum :
return sc_addr + 24;
/* sc_addr + 28 is __status, the exception status.
sc_addr + 32 is syscallno, the syscall number or -1.
sc_addr + 36 is orig_gr8, the original syscall arg #1.
sc_addr + 40 is gner[0].
sc_addr + 44 is gner[1]. */
case iacc0h_regnum :
return sc_addr + 48;
case iacc0l_regnum :
return sc_addr + 52;
default :
if (first_gpr_regnum <= regno && regno <= last_gpr_regnum)
return sc_addr + 56 + 4 * (regno - first_gpr_regnum);
else if (first_fpr_regnum <= regno && regno <= last_fpr_regnum)
return sc_addr + 312 + 4 * (regno - first_fpr_regnum);
else
return -1; /* not saved. */
}
}
/* 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, gdb_byte *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;
}
static void
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* Set the sigtramp frame sniffer. */
frame_unwind_append_sniffer (gdbarch, frv_linux_sigtramp_frame_sniffer);
}
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);
}
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