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[RFA] Handle am33 linux signal frames
- From: Kevin Buettner <kevinb at redhat dot com>
- To: Michael Snyder <msnyder at redhat dot com>
- Cc: gdb-patches at sources dot redhat dot com
- Date: Thu, 16 Feb 2006 15:44:11 -0700
- Subject: [RFA] Handle am33 linux signal frames
The patch below adds support for signal frames on am33 GNU/Linux.
Okay?
* Makefile.in (mn10300-linux-tdep.o): Update dependencies.
* mn10300-linux-tdep.c (frame.h, trad-frame.h, tramp-frame.h):
Include.
(am33_linux_sigframe_cache_init): New function.
(am33_linux_sigframe, am33_linux_rt_sigframe): New signal frame
descriptions.
(AM33_SIGCONTEXT_D0, AM33_SIGCONTEXT_D1, AM33_SIGCONTEXT_D2)
(AM33_SIGCONTEXT_D3, AM33_SIGCONTEXT_A0, AM33_SIGCONTEXT_A1)
(AM33_SIGCONTEXT_A2, AM33_SIGCONTEXT_A3, AM33_SIGCONTEXT_E0)
(AM33_SIGCONTEXT_E1, AM33_SIGCONTEXT_E2, AM33_SIGCONTEXT_E3)
(AM33_SIGCONTEXT_E4, AM33_SIGCONTEXT_E5, AM33_SIGCONTEXT_E6)
(AM33_SIGCONTEXT_E7, AM33_SIGCONTEXT_LAR, AM33_SIGCONTEXT_LIR)
(AM33_SIGCONTEXT_MDR, AM33_SIGCONTEXT_MCVF, AM33_SIGCONTEXT_MCRL)
(AM33_SIGCONTEXT_MCRH, AM33_SIGCONTEXT_MDRQ, AM33_SIGCONTEXT_SP)
(AM33_SIGCONTEXT_EPSW, AM33_SIGCONTEXT_PC, AM33_SIGCONTEXT_FPUCONTEXT):
New constants.
(am33_linux_init_osabi): Register signal frame unwinders.
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.786
diff -u -p -r1.786 Makefile.in
--- Makefile.in 10 Feb 2006 22:01:43 -0000 1.786
+++ Makefile.in 16 Feb 2006 22:33:03 -0000
@@ -2326,7 +2326,8 @@ mipsv4-nat.o: mipsv4-nat.c $(defs_h) $(i
$(regcache_h) $(gregset_h)
mn10300-linux-tdep.o: mn10300-linux-tdep.c $(defs_h) $(gdbcore_h) \
$(gdb_string_h) $(regcache_h) $(mn10300_tdep_h) $(gdb_assert_h) \
- $(bfd_h) $(elf_bfd_h) $(osabi_h) $(regset_h) $(solib_svr4_h)
+ $(bfd_h) $(elf_bfd_h) $(osabi_h) $(regset_h) $(solib_svr4_h) \
+ $(frame_h) $(trad_frame_h) $(tramp_frame_h)
mn10300-tdep.o: mn10300-tdep.c $(defs_h) $(arch_utils_h) $(dis_asm_h) \
$(gdbtypes_h) $(regcache_h) $(gdb_string_h) $(gdb_assert_h) \
$(frame_h) $(frame_unwind_h) $(frame_base_h) $(trad_frame_h) \
Index: mn10300-linux-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mn10300-linux-tdep.c,v
retrieving revision 1.4
diff -u -p -r1.4 mn10300-linux-tdep.c
--- mn10300-linux-tdep.c 17 Dec 2005 22:34:01 -0000 1.4
+++ mn10300-linux-tdep.c 16 Feb 2006 22:33:03 -0000
@@ -30,6 +30,9 @@
#include "osabi.h"
#include "regset.h"
#include "solib-svr4.h"
+#include "frame.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
#include <stdlib.h>
@@ -467,7 +470,240 @@ am33_regset_from_core_section (struct gd
am33_supply_gregset_method,
am33_collect_gregset_method);
}
+
+static void
+am33_linux_sigframe_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func);
+
+static const struct tramp_frame am33_linux_sigframe = {
+ SIGTRAMP_FRAME,
+ 1,
+ {
+ /* mov 119,d0 */
+ { 0x2c, -1 },
+ { 0x77, -1 },
+ { 0x00, -1 },
+ /* syscall 0 */
+ { 0xf0, -1 },
+ { 0xe0, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ am33_linux_sigframe_cache_init
+};
+
+static const struct tramp_frame am33_linux_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 1,
+ {
+ /* mov 173,d0 */
+ { 0x2c, -1 },
+ { 0xad, -1 },
+ { 0x00, -1 },
+ /* syscall 0 */
+ { 0xf0, -1 },
+ { 0xe0, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ am33_linux_sigframe_cache_init
+};
+
+/* Relevant struct definitions for signal handling...
+
+From arch/mn10300/kernel/sigframe.h:
+
+struct sigframe
+{
+ void (*pretcode)(void);
+ int sig;
+ struct sigcontext sc;
+ struct fpucontext fpuctx;
+ unsigned long extramask[_NSIG_WORDS-1];
+ char retcode[8];
+};
+
+struct rt_sigframe
+{
+ void (*pretcode)(void);
+ int sig;
+ struct siginfo *pinfo;
+ void *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ struct fpucontext fpuctx;
+ char retcode[8];
+};
+
+From include/asm-mn10300/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-mn10300/sigcontext.h:
+
+struct fpucontext {
+ unsigned long fs[32];
+ unsigned long fpcr;
+};
+
+struct sigcontext {
+ unsigned long d0;
+ unsigned long d1;
+ unsigned long d2;
+ unsigned long d3;
+ unsigned long a0;
+ unsigned long a1;
+ unsigned long a2;
+ unsigned long a3;
+ unsigned long e0;
+ unsigned long e1;
+ unsigned long e2;
+ unsigned long e3;
+ unsigned long e4;
+ unsigned long e5;
+ unsigned long e6;
+ unsigned long e7;
+ unsigned long lar;
+ unsigned long lir;
+ unsigned long mdr;
+ unsigned long mcvf;
+ unsigned long mcrl;
+ unsigned long mcrh;
+ unsigned long mdrq;
+ unsigned long sp;
+ unsigned long epsw;
+ unsigned long pc;
+ struct fpucontext *fpucontext;
+ unsigned long oldmask;
+}; */
+
+
+#define AM33_SIGCONTEXT_D0 0
+#define AM33_SIGCONTEXT_D1 4
+#define AM33_SIGCONTEXT_D2 8
+#define AM33_SIGCONTEXT_D3 12
+#define AM33_SIGCONTEXT_A0 16
+#define AM33_SIGCONTEXT_A1 20
+#define AM33_SIGCONTEXT_A2 24
+#define AM33_SIGCONTEXT_A3 28
+#define AM33_SIGCONTEXT_E0 32
+#define AM33_SIGCONTEXT_E1 36
+#define AM33_SIGCONTEXT_E2 40
+#define AM33_SIGCONTEXT_E3 44
+#define AM33_SIGCONTEXT_E4 48
+#define AM33_SIGCONTEXT_E5 52
+#define AM33_SIGCONTEXT_E6 56
+#define AM33_SIGCONTEXT_E7 60
+#define AM33_SIGCONTEXT_LAR 64
+#define AM33_SIGCONTEXT_LIR 68
+#define AM33_SIGCONTEXT_MDR 72
+#define AM33_SIGCONTEXT_MCVF 76
+#define AM33_SIGCONTEXT_MCRL 80
+#define AM33_SIGCONTEXT_MCRH 84
+#define AM33_SIGCONTEXT_MDRQ 88
+#define AM33_SIGCONTEXT_SP 92
+#define AM33_SIGCONTEXT_EPSW 96
+#define AM33_SIGCONTEXT_PC 100
+#define AM33_SIGCONTEXT_FPUCONTEXT 104
+
+
+static void
+am33_linux_sigframe_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR sc_base, fpubase;
+ int i;
+ sc_base = frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
+ if (self == &am33_linux_sigframe)
+ {
+ sc_base += 8;
+ }
+ else
+ {
+ sc_base += 12;
+ sc_base = get_frame_memory_unsigned (next_frame, sc_base, 4);
+ sc_base += 20;
+ }
+
+ trad_frame_set_reg_addr (this_cache, E_D0_REGNUM,
+ sc_base + AM33_SIGCONTEXT_D0);
+ trad_frame_set_reg_addr (this_cache, E_D1_REGNUM,
+ sc_base + AM33_SIGCONTEXT_D1);
+ trad_frame_set_reg_addr (this_cache, E_D2_REGNUM,
+ sc_base + AM33_SIGCONTEXT_D2);
+ trad_frame_set_reg_addr (this_cache, E_D3_REGNUM,
+ sc_base + AM33_SIGCONTEXT_D3);
+
+ trad_frame_set_reg_addr (this_cache, E_A0_REGNUM,
+ sc_base + AM33_SIGCONTEXT_A0);
+ trad_frame_set_reg_addr (this_cache, E_A1_REGNUM,
+ sc_base + AM33_SIGCONTEXT_A1);
+ trad_frame_set_reg_addr (this_cache, E_A2_REGNUM,
+ sc_base + AM33_SIGCONTEXT_A2);
+ trad_frame_set_reg_addr (this_cache, E_A3_REGNUM,
+ sc_base + AM33_SIGCONTEXT_A3);
+
+ trad_frame_set_reg_addr (this_cache, E_E0_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E0);
+ trad_frame_set_reg_addr (this_cache, E_E1_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E1);
+ trad_frame_set_reg_addr (this_cache, E_E2_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E2);
+ trad_frame_set_reg_addr (this_cache, E_E3_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E3);
+ trad_frame_set_reg_addr (this_cache, E_E4_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E4);
+ trad_frame_set_reg_addr (this_cache, E_E5_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E5);
+ trad_frame_set_reg_addr (this_cache, E_E6_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E6);
+ trad_frame_set_reg_addr (this_cache, E_E7_REGNUM,
+ sc_base + AM33_SIGCONTEXT_E7);
+
+ trad_frame_set_reg_addr (this_cache, E_LAR_REGNUM,
+ sc_base + AM33_SIGCONTEXT_LAR);
+ trad_frame_set_reg_addr (this_cache, E_LIR_REGNUM,
+ sc_base + AM33_SIGCONTEXT_LIR);
+ trad_frame_set_reg_addr (this_cache, E_MDR_REGNUM,
+ sc_base + AM33_SIGCONTEXT_MDR);
+ trad_frame_set_reg_addr (this_cache, E_MCVF_REGNUM,
+ sc_base + AM33_SIGCONTEXT_MCVF);
+ trad_frame_set_reg_addr (this_cache, E_MCRL_REGNUM,
+ sc_base + AM33_SIGCONTEXT_MCRL);
+ trad_frame_set_reg_addr (this_cache, E_MDRQ_REGNUM,
+ sc_base + AM33_SIGCONTEXT_MDRQ);
+
+ trad_frame_set_reg_addr (this_cache, E_SP_REGNUM,
+ sc_base + AM33_SIGCONTEXT_SP);
+ trad_frame_set_reg_addr (this_cache, E_PSW_REGNUM,
+ sc_base + AM33_SIGCONTEXT_EPSW);
+ trad_frame_set_reg_addr (this_cache, E_PC_REGNUM,
+ sc_base + AM33_SIGCONTEXT_PC);
+
+ fpubase = get_frame_memory_unsigned (next_frame,
+ sc_base + AM33_SIGCONTEXT_FPUCONTEXT, 4);
+ if (fpubase)
+ {
+ for (i = 0; i < 32; i++)
+ {
+ trad_frame_set_reg_addr (this_cache, E_FS0_REGNUM + i,
+ fpubase + 4 * i);
+ }
+ trad_frame_set_reg_addr (this_cache, E_FPCR_REGNUM, fpubase + 4 * 32);
+ }
+
+ trad_frame_set_id (this_cache, frame_id_build (sc_base, func));
+}
+
/* AM33 Linux osabi has been recognized.
Now's our chance to register our corefile handling. */
@@ -478,6 +714,9 @@ am33_linux_init_osabi (struct gdbarch_in
am33_regset_from_core_section);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
+ tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
}
void