Browse Source
Add m32r-linux support.
* configure.tgt: Add m32r*-*-linux*.
* Makefile.in (ALLDEPFILES): Add m32r-tdep.c, m32r-linux-nat.c
and m32r-linux-tdep.c.
(m32r-linux-nat.o, m32r-linux-tdep.o): New dependencies.
* m32r-tdep.c: Move some definitions to m32r-tdep.h.
* config/djgpp/fnchange.lst: Add m32r-linux-nat.c and
m32r-linux-tdep.c.
* m32r-tdep.h, m32r-linux-nat.c, m32r-linux-tdep.c,
config/m32r/linux.mh, config/m32r/linux.mt,
config/m32r/nm-linux.h: New files.
jimb-rda-nptl-branch
Kazuhiro Inaoka
22 years ago
11 changed files with 701 additions and 33 deletions
@ -0,0 +1,8 @@ |
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# Host: M32R based machine running GNU/Linux |
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NAT_FILE= nm-linux.h |
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NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \ |
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m32r-linux-nat.o gcore.o proc-service.o thread-db.o \ |
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linux-nat.o |
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LOADLIBES= -ldl -rdynamic |
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@ -0,0 +1,6 @@ |
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# Target: Renesas M32R running GNU/Linux |
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TDEPFILES= m32r-tdep.o m32r-linux-tdep.o remote-m32r-sdi.o glibc-tdep.o solib.o solib-svr4.o solib-legacy.o |
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DEPRECATED_TM_FILE= config/tm-linux.h |
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SIM_OBS = remote-sim.o |
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SIM = ../sim/m32r/libsim.a |
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@ -0,0 +1,29 @@ |
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/* Definitions to make GDB run on an M32R based machine under GNU/Linux.
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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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|
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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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|
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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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|
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#ifndef NM_M32R_LINUX_H |
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#define NM_M32R_LINUX_H |
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#include "config/nm-linux.h" |
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/* Override copies of {fetch,store}_inferior_registers in infptrace.c. */ |
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#define FETCH_INFERIOR_REGISTERS |
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#endif /* NM_M32R_LINUX_H */ |
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@ -0,0 +1,235 @@ |
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/* Native-dependent code for GNU/Linux m32r.
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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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|
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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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|
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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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|
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#include "defs.h" |
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#include "inferior.h" |
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#include "gdbcore.h" |
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#include "regcache.h" |
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#include "linux-nat.h" |
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#include "gdb_assert.h" |
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#include "gdb_string.h" |
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#include <sys/ptrace.h> |
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#include <sys/user.h> |
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#include <sys/procfs.h> |
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/* Prototypes for supply_gregset etc. */ |
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#include "gregset.h" |
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#include "m32r-tdep.h" |
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/* Since EVB register is not available for native debug, we reduce
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the number of registers. */ |
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#define M32R_LINUX_NUM_REGS (M32R_NUM_REGS - 1) |
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/* Mapping between the general-purpose registers in `struct user'
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format and GDB's register array layout. */ |
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static int regmap[] = { |
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4, 5, 6, 7, 0, 1, 2, 8, |
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9, 10, 11, 12, 13, 24, 25, 23, |
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19, 19, 26, 23, 22, 20, 16, 15 |
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}; |
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#define PSW_REGMAP 19 |
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#define BBPSW_REGMAP 21 |
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#define SPU_REGMAP 23 |
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#define SPI_REGMAP 26 |
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/* Doee apply to the corresponding SET requests as well. */ |
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#define GETREGS_SUPPLIES(regno) (0 <= (regno) && (regno) <= M32R_LINUX_NUM_REGS) |
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/* Transfering the general-purpose registers between GDB, inferiors
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and core files. */ |
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/* Fill GDB's register array with the general-purpose register values
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in *GREGSETP. */ |
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void |
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supply_gregset (elf_gregset_t * gregsetp) |
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{ |
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elf_greg_t *regp = (elf_greg_t *) gregsetp; |
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int i; |
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unsigned long psw, bbpsw; |
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psw = *(regp + PSW_REGMAP); |
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bbpsw = *(regp + BBPSW_REGMAP); |
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for (i = 0; i < M32R_LINUX_NUM_REGS; i++) |
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{ |
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switch (i) |
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{ |
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case PSW_REGNUM: |
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*(regp + regmap[i]) = |
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((0x00c1 & bbpsw) << 8) | ((0xc100 & psw) >> 8); |
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break; |
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case CBR_REGNUM: |
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*(regp + regmap[i]) = ((psw >> 8) & 1); |
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break; |
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} |
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if (i != M32R_SP_REGNUM) |
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regcache_raw_supply (current_regcache, i, regp + regmap[i]); |
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else if (psw & 0x8000) |
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regcache_raw_supply (current_regcache, i, regp + SPU_REGMAP); |
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else |
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regcache_raw_supply (current_regcache, i, regp + SPI_REGMAP); |
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} |
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} |
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/* Fetch all general-purpose registers from process/thread TID and
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store their values in GDB's register array. */ |
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static void |
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fetch_regs (int tid) |
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{ |
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elf_gregset_t regs; |
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if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
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perror_with_name ("Couldn't get registers"); |
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supply_gregset (®s); |
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} |
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/* Fill register REGNO (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNO is -1, |
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do this for all registers. */ |
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void |
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fill_gregset (elf_gregset_t * gregsetp, int regno) |
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{ |
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elf_greg_t *regp = (elf_greg_t *) gregsetp; |
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int i; |
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unsigned long psw, bbpsw, tmp; |
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psw = *(regp + PSW_REGMAP); |
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bbpsw = *(regp + BBPSW_REGMAP); |
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for (i = 0; i < M32R_LINUX_NUM_REGS; i++) |
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{ |
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if (regno != -1 && regno != i) |
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continue; |
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if (i == CBR_REGNUM || i == PSW_REGNUM) |
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continue; |
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if (i == SPU_REGNUM || i == SPI_REGNUM) |
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continue; |
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if (i != M32R_SP_REGNUM) |
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regcache_raw_collect (current_regcache, i, regp + regmap[i]); |
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else if (psw & 0x8000) |
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regcache_raw_collect (current_regcache, i, regp + SPU_REGMAP); |
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else |
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regcache_raw_collect (current_regcache, i, regp + SPI_REGMAP); |
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} |
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} |
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/* Store all valid general-purpose registers in GDB's register array
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into the process/thread specified by TID. */ |
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static void |
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store_regs (int tid, int regno) |
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{ |
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elf_gregset_t regs; |
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if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
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perror_with_name ("Couldn't get registers"); |
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fill_gregset (®s, regno); |
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if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) |
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perror_with_name ("Couldn't write registers"); |
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} |
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/* Transfering floating-point registers between GDB, inferiors and cores.
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Since M32R has no floating-point registers, these functions do nothing. */ |
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void |
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supply_fpregset (gdb_fpregset_t *fpregs) |
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{ |
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} |
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void |
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fill_fpregset (gdb_fpregset_t *fpregs, int regno) |
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{ |
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} |
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/* Transferring arbitrary registers between GDB and inferior. */ |
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/* Fetch register REGNO from the child process. If REGNO is -1, do
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this for all registers (including the floating point and SSE |
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registers). */ |
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void |
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fetch_inferior_registers (int regno) |
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{ |
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int tid; |
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/* GNU/Linux LWP ID's are process ID's. */ |
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tid = TIDGET (inferior_ptid); |
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if (tid == 0) |
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tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
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/* Use the PTRACE_GETREGS request whenever possible, since it
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transfers more registers in one system call, and we'll cache the |
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results. */ |
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if (regno == -1 || GETREGS_SUPPLIES (regno)) |
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{ |
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fetch_regs (tid); |
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return; |
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} |
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internal_error (__FILE__, __LINE__, |
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"Got request for bad register number %d.", regno); |
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} |
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/* Store register REGNO back into the child process. If REGNO is -1,
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do this for all registers (including the floating point and SSE |
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registers). */ |
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void |
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store_inferior_registers (int regno) |
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{ |
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int tid; |
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/* GNU/Linux LWP ID's are process ID's. */ |
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if ((tid = TIDGET (inferior_ptid)) == 0) |
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tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
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/* Use the PTRACE_SETREGS request whenever possible, since it
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transfers more registers in one system call. */ |
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if (regno == -1 || GETREGS_SUPPLIES (regno)) |
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{ |
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store_regs (tid, regno); |
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return; |
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} |
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internal_error (__FILE__, __LINE__, |
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"Got request to store bad register number %d.", regno); |
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} |
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@ -0,0 +1,336 @@ |
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/* Target-dependent code for GNU/Linux m32r.
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Copyright 2004 Free Software Foundation, Inc. |
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This file is part of GDB. |
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|
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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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|
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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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|
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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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|
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#include "defs.h" |
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#include "gdbcore.h" |
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#include "frame.h" |
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#include "value.h" |
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#include "regcache.h" |
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#include "inferior.h" |
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#include "osabi.h" |
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#include "reggroups.h" |
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#include "gdb_string.h" |
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#include "glibc-tdep.h" |
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#include "solib-svr4.h" |
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#include "trad-frame.h" |
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#include "frame-unwind.h" |
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#include "m32r-tdep.h" |
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/* Recognizing signal handler frames. */ |
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/* GNU/Linux has two flavors of signals. Normal signal handlers, and
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"realtime" (RT) signals. The RT signals can provide additional |
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information to the signal handler if the SA_SIGINFO flag is set |
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when establishing a signal handler using `sigaction'. It is not |
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unlikely that future versions of GNU/Linux will support SA_SIGINFO |
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for normal signals too. */ |
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/* When the m32r Linux kernel calls a signal handler and the
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SA_RESTORER flag isn't set, the return address points to a bit of |
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code on the stack. This function returns whether the PC appears to |
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be within this bit of code. |
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The instruction sequence for normal signals is |
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ldi r7, #__NR_sigreturn |
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trap #2 |
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or 0x67 0x77 0x10 0xf2. |
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Checking for the code sequence should be somewhat reliable, because |
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the effect is to call the system call sigreturn. This is unlikely |
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to occur anywhere other than in a signal trampoline. |
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It kind of sucks that we have to read memory from the process in |
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order to identify a signal trampoline, but there doesn't seem to be |
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any other way. Therefore we only do the memory reads if no |
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function name could be identified, which should be the case since |
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the code is on the stack. |
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Detection of signal trampolines for handlers that set the |
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SA_RESTORER flag is in general not possible. Unfortunately this is |
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what the GNU C Library has been doing for quite some time now. |
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However, as of version 2.1.2, the GNU C Library uses signal |
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trampolines (named __restore and __restore_rt) that are identical |
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to the ones used by the kernel. Therefore, these trampolines are |
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supported too. */ |
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static const unsigned char linux_sigtramp_code[] = { |
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0x67, 0x77, 0x10, 0xf2, |
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}; |
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/* If PC is in a sigtramp routine, return the address of the start of
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the routine. Otherwise, return 0. */ |
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static CORE_ADDR |
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m32r_linux_sigtramp_start (CORE_ADDR pc, struct frame_info *next_frame) |
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{ |
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unsigned char buf[4]; |
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/* We only recognize a signal trampoline if PC is at the start of
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one of the instructions. We optimize for finding the PC at the |
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start of the instruction sequence, as will be the case when the |
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trampoline is not the first frame on the stack. We assume that |
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in the case where the PC is not at the start of the instruction |
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sequence, there will be a few trailing readable bytes on the |
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stack. */ |
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if (pc % 2 != 0) |
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{ |
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if (!safe_frame_unwind_memory (next_frame, pc, buf, 2)) |
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return 0; |
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if (memcmp (buf, linux_sigtramp_code, 2) == 0) |
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pc -= 2; |
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else |
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return 0; |
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} |
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if (!safe_frame_unwind_memory (next_frame, pc, buf, 4)) |
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return 0; |
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if (memcmp (buf, linux_sigtramp_code, 4) != 0) |
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return 0; |
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return pc; |
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} |
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/* This function does the same for RT signals. Here the instruction
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sequence is |
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ldi r7, #__NR_rt_sigreturn |
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trap #2 |
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or 0x97 0xf0 0x00 0xad 0x10 0xf2 0xf0 0x00. |
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The effect is to call the system call rt_sigreturn. */ |
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static const unsigned char linux_rt_sigtramp_code[] = { |
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0x97, 0xf0, 0x00, 0xad, 0x10, 0xf2, 0xf0, 0x00, |
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}; |
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/* If PC is in a RT sigtramp routine, return the address of the start
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of the routine. Otherwise, return 0. */ |
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static CORE_ADDR |
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m32r_linux_rt_sigtramp_start (CORE_ADDR pc, struct frame_info *next_frame) |
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{ |
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unsigned char buf[4]; |
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/* We only recognize a signal trampoline if PC is at the start of
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one of the instructions. We optimize for finding the PC at the |
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start of the instruction sequence, as will be the case when the |
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trampoline is not the first frame on the stack. We assume that |
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in the case where the PC is not at the start of the instruction |
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sequence, there will be a few trailing readable bytes on the |
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stack. */ |
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if (pc % 2 != 0) |
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return 0; |
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if (!safe_frame_unwind_memory (next_frame, pc, buf, 4)) |
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return 0; |
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if (memcmp (buf, linux_rt_sigtramp_code, 4) == 0) |
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{ |
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if (!safe_frame_unwind_memory (next_frame, pc + 4, buf, 4)) |
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return 0; |
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if (memcmp (buf, linux_rt_sigtramp_code + 4, 4) == 0) |
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return pc; |
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} |
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else if (memcmp (buf, linux_rt_sigtramp_code + 4, 4) == 0) |
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{ |
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if (!safe_frame_unwind_memory (next_frame, pc - 4, buf, 4)) |
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return 0; |
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if (memcmp (buf, linux_rt_sigtramp_code, 4) == 0) |
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return pc - 4; |
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} |
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return 0; |
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} |
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static int |
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m32r_linux_pc_in_sigtramp (CORE_ADDR pc, char *name, |
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struct frame_info *next_frame) |
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{ |
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/* If we have NAME, we can optimize the search. The trampolines are
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named __restore and __restore_rt. However, they aren't dynamically |
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exported from the shared C library, so the trampoline may appear to |
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be part of the preceding function. This should always be sigaction, |
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__sigaction, or __libc_sigaction (all aliases to the same function). */ |
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if (name == NULL || strstr (name, "sigaction") != NULL) |
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return (m32r_linux_sigtramp_start (pc, next_frame) != 0 |
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|| m32r_linux_rt_sigtramp_start (pc, next_frame) != 0); |
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return (strcmp ("__restore", name) == 0 |
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|| strcmp ("__restore_rt", name) == 0); |
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} |
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/* From <asm/sigcontext.h>. */ |
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static int m32r_linux_sc_reg_offset[] = { |
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4 * 4, /* r0 */ |
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5 * 4, /* r1 */ |
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6 * 4, /* r2 */ |
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7 * 4, /* r3 */ |
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0 * 4, /* r4 */ |
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1 * 4, /* r5 */ |
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2 * 4, /* r6 */ |
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8 * 4, /* r7 */ |
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9 * 4, /* r8 */ |
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10 * 4, /* r9 */ |
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11 * 4, /* r10 */ |
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12 * 4, /* r11 */ |
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13 * 4, /* r12 */ |
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21 * 4, /* fp */ |
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22 * 4, /* lr */ |
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-1 * 4, /* sp */ |
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16 * 4, /* psw */ |
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-1 * 4, /* cbr */ |
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23 * 4, /* spi */ |
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20 * 4, /* spu */ |
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19 * 4, /* bpc */ |
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17 * 4, /* pc */ |
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15 * 4, /* accl */ |
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14 * 4 /* acch */ |
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}; |
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struct m32r_frame_cache |
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{ |
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CORE_ADDR base, pc; |
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struct trad_frame_saved_reg *saved_regs; |
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}; |
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static struct m32r_frame_cache * |
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m32r_linux_sigtramp_frame_cache (struct frame_info *next_frame, |
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void **this_cache) |
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{ |
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struct m32r_frame_cache *cache; |
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CORE_ADDR sigcontext_addr, addr; |
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int regnum; |
|||
|
|||
if ((*this_cache) != NULL) |
|||
return (*this_cache); |
|||
cache = FRAME_OBSTACK_ZALLOC (struct m32r_frame_cache); |
|||
(*this_cache) = cache; |
|||
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); |
|||
|
|||
cache->base = frame_unwind_register_unsigned (next_frame, M32R_SP_REGNUM); |
|||
sigcontext_addr = cache->base + 4; |
|||
|
|||
cache->pc = frame_pc_unwind (next_frame); |
|||
addr = m32r_linux_sigtramp_start (cache->pc, next_frame); |
|||
if (addr == 0) |
|||
{ |
|||
/* If this is a RT signal trampoline, adjust SIGCONTEXT_ADDR
|
|||
accordingly. */ |
|||
addr = m32r_linux_rt_sigtramp_start (cache->pc, next_frame); |
|||
if (addr) |
|||
sigcontext_addr += 128; |
|||
else |
|||
addr = frame_func_unwind (next_frame); |
|||
} |
|||
cache->pc = addr; |
|||
|
|||
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); |
|||
|
|||
for (regnum = 0; regnum < sizeof (m32r_linux_sc_reg_offset) / 4; regnum++) |
|||
{ |
|||
if (m32r_linux_sc_reg_offset[regnum] >= 0) |
|||
cache->saved_regs[regnum].addr = |
|||
sigcontext_addr + m32r_linux_sc_reg_offset[regnum]; |
|||
} |
|||
|
|||
return cache; |
|||
} |
|||
|
|||
static void |
|||
m32r_linux_sigtramp_frame_this_id (struct frame_info *next_frame, |
|||
void **this_cache, |
|||
struct frame_id *this_id) |
|||
{ |
|||
struct m32r_frame_cache *cache = |
|||
m32r_linux_sigtramp_frame_cache (next_frame, this_cache); |
|||
|
|||
(*this_id) = frame_id_build (cache->base, cache->pc); |
|||
} |
|||
|
|||
static void |
|||
m32r_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) |
|||
{ |
|||
struct m32r_frame_cache *cache = |
|||
m32r_linux_sigtramp_frame_cache (next_frame, this_cache); |
|||
|
|||
trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, |
|||
optimizedp, lvalp, addrp, realnump, valuep); |
|||
} |
|||
|
|||
static const struct frame_unwind m32r_linux_sigtramp_frame_unwind = { |
|||
SIGTRAMP_FRAME, |
|||
m32r_linux_sigtramp_frame_this_id, |
|||
m32r_linux_sigtramp_frame_prev_register |
|||
}; |
|||
|
|||
static const struct frame_unwind * |
|||
m32r_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 (m32r_linux_pc_in_sigtramp (pc, name, next_frame)) |
|||
return &m32r_linux_sigtramp_frame_unwind; |
|||
|
|||
return NULL; |
|||
} |
|||
|
|||
static void |
|||
m32r_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
|||
{ |
|||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
|||
|
|||
/* Since EVB register is not available for native debug, we reduce
|
|||
the number of registers. */ |
|||
set_gdbarch_num_regs (gdbarch, M32R_NUM_REGS - 1); |
|||
|
|||
frame_unwind_append_sniffer (gdbarch, m32r_linux_sigtramp_frame_sniffer); |
|||
|
|||
/* GNU/Linux uses SVR4-style shared libraries. */ |
|||
set_solib_svr4_fetch_link_map_offsets |
|||
(gdbarch, svr4_ilp32_fetch_link_map_offsets); |
|||
} |
|||
|
|||
/* Provide a prototype to silence -Wmissing-prototypes. */ |
|||
extern void _initialize_m32r_linux_tdep (void); |
|||
|
|||
void |
|||
_initialize_m32r_linux_tdep (void) |
|||
{ |
|||
gdbarch_register_osabi (bfd_arch_m32r, 0, GDB_OSABI_LINUX, |
|||
m32r_linux_init_abi); |
|||
} |
|||
@ -0,0 +1,52 @@ |
|||
/* Target-dependent code for Renesas M32R, for GDB.
|
|||
|
|||
Copyright 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., 59 Temple Place - Suite 330, |
|||
Boston, MA 02111-1307, USA. */ |
|||
|
|||
#ifndef M32R_TDEP_H |
|||
#define M32R_TDEP_H |
|||
|
|||
struct gdbarch_tdep |
|||
{ |
|||
/* gdbarch target dependent data here. Currently unused for M32R. */ |
|||
}; |
|||
|
|||
/* m32r register names. */ |
|||
|
|||
enum m32r_regnum |
|||
{ |
|||
R0_REGNUM = 0, |
|||
R3_REGNUM = 3, |
|||
M32R_FP_REGNUM = 13, |
|||
LR_REGNUM = 14, |
|||
M32R_SP_REGNUM = 15, |
|||
PSW_REGNUM = 16, |
|||
CBR_REGNUM = 17, |
|||
SPU_REGNUM = 18, |
|||
SPI_REGNUM = 19, |
|||
M32R_PC_REGNUM = 21, |
|||
/* m32r calling convention. */ |
|||
ARG1_REGNUM = R0_REGNUM, |
|||
ARGN_REGNUM = R3_REGNUM, |
|||
RET1_REGNUM = R0_REGNUM, |
|||
}; |
|||
|
|||
#define M32R_NUM_REGS 25 |
|||
|
|||
#endif /* m32r-tdep.h */ |
|||
Loading…
Reference in new issue