From 2aa830e4a6c1e6f378b87ed37a5a239325a59982 Mon Sep 17 00:00:00 2001 From: Daniel Jacobowitz Date: Tue, 10 Jul 2001 20:41:54 +0000 Subject: [PATCH] MIPS/Linux support --- gdb/ChangeLog | 13 ++ gdb/NEWS | 1 + gdb/config/mips/linux.mh | 8 + gdb/config/mips/linux.mt | 9 + gdb/config/mips/nm-linux.h | 66 +++++++ gdb/config/mips/tm-linux.h | 90 ++++++++++ gdb/config/mips/xm-linux.h | 36 ++++ gdb/configure.host | 2 + gdb/configure.tgt | 1 + gdb/mips-linux-nat.c | 58 +++++++ gdb/mips-linux-tdep.c | 344 +++++++++++++++++++++++++++++++++++++ 11 files changed, 628 insertions(+) create mode 100644 gdb/config/mips/linux.mh create mode 100644 gdb/config/mips/linux.mt create mode 100644 gdb/config/mips/nm-linux.h create mode 100644 gdb/config/mips/tm-linux.h create mode 100644 gdb/config/mips/xm-linux.h create mode 100644 gdb/mips-linux-nat.c create mode 100644 gdb/mips-linux-tdep.c diff --git a/gdb/ChangeLog b/gdb/ChangeLog index bb8f62b58e..ecfed2278c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,16 @@ +2001-07-10 Daniel Jacobowitz + + * mips-linux-tdep.c: New file. + * mips-linux-nat.c: New file. + * config/mips/linux.mh: New file. + * config/mips/linux.mt: New file. + * config/mips/xm-linux.h: New file. + * config/mips/nm-linux.h: New file. + * config/mips/tm-linux.h: New file. + * configure.host: Recognize mips*-*-linux*. + * configure.tgt: Likewise. + * NEWS: Mention mips*-*-linux* port. + 2001-07-09 Andrew Cagney * serial.h (struct serial): Rename `struct _serial_t'. diff --git a/gdb/NEWS b/gdb/NEWS index 816cf4cc35..d8af4c4c2a 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -14,6 +14,7 @@ revised and enabled. Alpha FreeBSD alpha*-*-freebsd* x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* +MIPS Linux mips*-*-linux* * New targets diff --git a/gdb/config/mips/linux.mh b/gdb/config/mips/linux.mh new file mode 100644 index 0000000000..1a4b45f5ae --- /dev/null +++ b/gdb/config/mips/linux.mh @@ -0,0 +1,8 @@ +# Host: Linux/MIPS +XDEPFILES= +XM_FILE= xm-linux.h +NAT_FILE= nm-linux.h +NATDEPFILES= infptrace.o inftarg.o fork-child.o mips-linux-nat.o \ + thread-db.o lin-lwp.o proc-service.o + +LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/mips/linux.mt b/gdb/config/mips/linux.mt new file mode 100644 index 0000000000..16f8e3283f --- /dev/null +++ b/gdb/config/mips/linux.mt @@ -0,0 +1,9 @@ +# Target: Linux/MIPS +TDEPFILES= mips-tdep.o mips-linux-tdep.o corelow.o \ + solib.o solib-svr4.o +TM_FILE= tm-linux.h + +GDBSERVER_DEPFILES= low-linux.o + +SIM_OBS = remote-sim.o +SIM = ../sim/mips/libsim.a diff --git a/gdb/config/mips/nm-linux.h b/gdb/config/mips/nm-linux.h new file mode 100644 index 0000000000..27fb1b1f7a --- /dev/null +++ b/gdb/config/mips/nm-linux.h @@ -0,0 +1,66 @@ +/* Native-dependent definitions for Linux/MIPS. + Copyright 1996, 2001 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 NM_MIPSLINUX_H +#define NM_MIPSLINUX_H + +#define MIPS_GNULINUX_TARGET + +#include "nm-linux.h" + +/* Return sizeof user struct to callers in less machine dependent + routines. Hard coded for cross-compilation friendliness. */ + +#define KERNEL_U_SIZE 504 + +/* ptrace register ``addresses'' are absolute. */ + +#define U_REGS_OFFSET 0 + +/* ptrace transfers longs, and expects addresses as longs. */ + +#define PTRACE_ARG3_TYPE long +#define PTRACE_XFER_TYPE long + +#define REGISTER_U_ADDR(addr, blockend, regno) \ + (addr) = mips_register_addr ((regno),(blockend)) + +int mips_linux_cannot_fetch_register (int regno); +int mips_linux_cannot_store_register (int regno); +#define CANNOT_FETCH_REGISTER(regno) mips_linux_cannot_fetch_register (regno) +#define CANNOT_STORE_REGISTER(regno) mips_linux_cannot_store_register (regno) + +/* FIXME: This should be moved to ../nm-linux.h once we have converted all + Linux targets to use the new threads stuff (without the #undef of + course). */ + +extern int lin_lwp_prepare_to_proceed (void); +#undef PREPARE_TO_PROCEED +#define PREPARE_TO_PROCEED(select_it) lin_lwp_prepare_to_proceed () + +extern void lin_lwp_attach_lwp (ptid_t ptid, int verbose); +#define ATTACH_LWP(ptid, verbose) lin_lwp_attach_lwp ((ptid), (verbose)) + +#include + +extern void lin_thread_get_thread_signals (sigset_t *mask); +#define GET_THREAD_SIGNALS(mask) lin_thread_get_thread_signals (mask) + +#endif /* NM_MIPSLINUX_H */ diff --git a/gdb/config/mips/tm-linux.h b/gdb/config/mips/tm-linux.h new file mode 100644 index 0000000000..54725fda32 --- /dev/null +++ b/gdb/config/mips/tm-linux.h @@ -0,0 +1,90 @@ +/* Target-dependent definitions for Linux/MIPS. + Copyright 2001 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 TM_MIPSLINUX_H +#define TM_MIPSLINUX_H + +#include "mips/tm-mips.h" + +/* We don't want to inherit tm-mips.h's shared library trampoline code. */ + +#undef IN_SOLIB_CALL_TRAMPOLINE +#undef IN_SOLIB_RETURN_TRAMPOLINE +#undef SKIP_TRAMPOLINE_CODE +#undef IGNORE_HELPER_CALL + +/* FIXME: Do not include "tm-linux.h", because we do not want the host's + . Instead, copy the non-signal bits for now. */ + +/* We need this file for the SOLIB_TRAMPOLINE stuff. */ + +#include "tm-sysv4.h" + +/* We define SVR4_SHARED_LIBS unconditionally, on the assumption that + link.h is available on all linux platforms. For I386 and SH3/4, + we hard-code the information rather than use link.h anyway (for + the benefit of cross-debugging). We may move to doing that for + other architectures as well. */ + +#define SVR4_SHARED_LIBS +#include "solib.h" /* Support for shared libraries. */ + +/* End from "tm-linux.h". */ + +/* There's an E_MIPS_ABI_O32 flag in e_flags, but we don't use it - in + fact, using it may violate the o32 ABI. */ + +#define MIPS_DEFAULT_ABI MIPS_ABI_O32 + +/* Linux/MIPS has __SIGRTMAX == 127. */ + +#define REALTIME_LO 32 +#define REALTIME_HI 128 + +/* Use target_specific function to define link map offsets. */ + +extern struct link_map_offsets *mips_linux_svr4_fetch_link_map_offsets (void); +#define SVR4_FETCH_LINK_MAP_OFFSETS() \ + mips_linux_svr4_fetch_link_map_offsets () + +/* Details about jmp_buf. */ + +#define JB_ELEMENT_SIZE 4 +#define JB_PC 0 + +/* Figure out where the longjmp will land. Slurp the arguments out of the + stack. We expect the first arg to be a pointer to the jmp_buf structure + from which we extract the pc (JB_PC) that we will land at. The pc is + copied into ADDR. This routine returns 1 on success. */ + +#define GET_LONGJMP_TARGET(ADDR) mips_linux_get_longjmp_target(ADDR) +extern int mips_linux_get_longjmp_target (CORE_ADDR *); + +/* We do single stepping in software. */ + +#define SOFTWARE_SINGLE_STEP_P() 1 +#define SOFTWARE_SINGLE_STEP(sig,bp_p) mips_software_single_step (sig, bp_p) + +/* FIXME: This still needs to be implemented. */ + +#undef IN_SIGTRAMP +#define IN_SIGTRAMP(pc, name) (0) + +#endif /* TM_MIPSLINUX_H */ diff --git a/gdb/config/mips/xm-linux.h b/gdb/config/mips/xm-linux.h new file mode 100644 index 0000000000..d28578b03c --- /dev/null +++ b/gdb/config/mips/xm-linux.h @@ -0,0 +1,36 @@ +/* Host definitions for Linux/MIPS. + Copyright 2001 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 XM_MIPSLINUX_H +#define XM_MIPSLINUX_H + +#ifndef HOST_BYTE_ORDER +#include +#if __BYTE_ORDER == __BIG_ENDIAN +#define HOST_BYTE_ORDER BIG_ENDIAN +#else +#define HOST_BYTE_ORDER LITTLE_ENDIAN +#endif +#endif + +/* Need R_OK etc, but USG isn't defined. */ +#include + +#endif /* XM_MIPSLINUX_H */ diff --git a/gdb/configure.host b/gdb/configure.host index c7268fea24..403957b708 100644 --- a/gdb/configure.host +++ b/gdb/configure.host @@ -16,6 +16,7 @@ hppa*) gdb_host_cpu=pa ;; i[3456]86*) gdb_host_cpu=i386 ;; m68*) gdb_host_cpu=m68k ;; m88*) gdb_host_cpu=m88k ;; +mips*) gdb_host_cpu=mips ;; powerpc*) gdb_host_cpu=powerpc ;; sparc64) gdb_host_cpu=sparc ;; s390*) gdb_host_cpu=s390 ;; @@ -118,6 +119,7 @@ mips-sgi-irix4*) gdb_host=irix4 ;; mips-sgi-irix5*) gdb_host=irix5 ;; mips-sgi-irix6*) gdb_host=irix6 ;; mips-sony-*) gdb_host=news-mips ;; +mips*-*-linux*) gdb_host=linux ;; mips-*-mach3*) gdb_host=mipsm3 ;; mips-*-sysv4*) gdb_host=mipsv4 ;; mips-*-sysv*) gdb_host=riscos ;; diff --git a/gdb/configure.tgt b/gdb/configure.tgt index b9f1d17067..57cc210982 100644 --- a/gdb/configure.tgt +++ b/gdb/configure.tgt @@ -211,6 +211,7 @@ mips*-sgi-irix5*) gdb_target=irix5 ;; mips*-sgi-irix6*) gdb_target=irix6 ;; mips*-sgi-*) gdb_target=irix3 ;; mips*-sony-*) gdb_target=bigmips ;; +mips*-*-linux*) gdb_target=linux ;; mips*-*-mach3*) gdb_target=mipsm3 ;; mips*-*-sysv4*) gdb_target=mipsv4 ;; mips*-*-sysv*) gdb_target=bigmips ;; diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c new file mode 100644 index 0000000000..3c2b159d78 --- /dev/null +++ b/gdb/mips-linux-nat.c @@ -0,0 +1,58 @@ +/* Native-dependent code for Linux/MIPS. + Copyright 2001 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. */ + +#include "defs.h" + +/* Pseudo registers can not be read. ptrace does not provide a way to + read (or set) PS_REGNUM, and there's no point in reading or setting + ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or FCRIR via + ptrace(). */ + +int +mips_linux_cannot_fetch_register (int regno) +{ + if (regno >= FP_REGNUM) + return 1; + else if (regno == PS_REGNUM) + return 1; + else if (regno == ZERO_REGNUM) + return 1; + else + return 0; +} + +int +mips_linux_cannot_store_register (int regno) +{ + if (regno >= FP_REGNUM) + return 1; + else if (regno == PS_REGNUM) + return 1; + else if (regno == ZERO_REGNUM) + return 1; + else if (regno == BADVADDR_REGNUM) + return 1; + else if (regno == CAUSE_REGNUM) + return 1; + else if (regno == FCRIR_REGNUM) + return 1; + else + return 0; +} diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c new file mode 100644 index 0000000000..5b583483be --- /dev/null +++ b/gdb/mips-linux-tdep.c @@ -0,0 +1,344 @@ +/* Target-dependent code for Linux/MIPS. + Copyright 2001 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. */ + +#include "defs.h" +#include "gdbcore.h" +#include "target.h" +#include "solib-svr4.h" + +/* Copied from . */ +#define ELF_NGREG 45 +#define ELF_NFPREG 33 + +typedef unsigned char elf_greg_t[4]; +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; + +typedef unsigned char elf_fpreg_t[8]; +typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; + +/* 0 - 31 are integer registers, 32 - 63 are fp registers. */ +#define FPR_BASE 32 +#define PC 64 +#define CAUSE 65 +#define BADVADDR 66 +#define MMHI 67 +#define MMLO 68 +#define FPC_CSR 69 +#define FPC_EIR 70 + +#define EF_REG0 6 +#define EF_REG31 37 +#define EF_LO 38 +#define EF_HI 39 +#define EF_CP0_EPC 40 +#define EF_CP0_BADVADDR 41 +#define EF_CP0_STATUS 42 +#define EF_CP0_CAUSE 43 + +#define EF_SIZE 180 + +/* Figure out where the longjmp will land. + We expect the first arg to be a pointer to the jmp_buf structure from + which we extract the pc (JB_PC) that we will land at. The pc is copied + into PC. This routine returns 1 on success. */ + +int +mips_linux_get_longjmp_target (CORE_ADDR *pc) +{ + CORE_ADDR jb_addr; + char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; + + jb_addr = read_register (A0_REGNUM); + + if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, + TARGET_PTR_BIT / TARGET_CHAR_BIT)) + return 0; + + *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); + + return 1; +} + +/* Unpack an elf_gregset_t into GDB's register cache. */ + +void +supply_gregset (elf_gregset_t *gregsetp) +{ + int regi; + elf_greg_t *regp = *gregsetp; + static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; + + for (regi = EF_REG0; regi <= EF_REG31; regi++) + supply_register ((regi - EF_REG0), (char *)(regp + regi)); + + supply_register (LO_REGNUM, (char *)(regp + EF_LO)); + supply_register (HI_REGNUM, (char *)(regp + EF_HI)); + + supply_register (PC_REGNUM, (char *)(regp + EF_CP0_EPC)); + supply_register (BADVADDR_REGNUM, (char *)(regp + EF_CP0_BADVADDR)); + supply_register (PS_REGNUM, (char *)(regp + EF_CP0_STATUS)); + supply_register (CAUSE_REGNUM, (char *)(regp + EF_CP0_CAUSE)); + + /* Fill inaccessible registers with zero. */ + supply_register (FP_REGNUM, zerobuf); + supply_register (UNUSED_REGNUM, zerobuf); + for (regi = FIRST_EMBED_REGNUM; regi < LAST_EMBED_REGNUM; regi++) + supply_register (regi, zerobuf); +} + +/* Pack our registers (or one register) into an elf_gregset_t. */ + +void +fill_gregset (elf_gregset_t *gregsetp, int regno) +{ + int regaddr, regi; + elf_greg_t *regp = *gregsetp; + void *src, *dst; + + if (regno == -1) + { + memset (regp, 0, sizeof (elf_gregset_t)); + for (regi = 0; regi < 32; regi++) + fill_gregset (gregsetp, regi); + fill_gregset (gregsetp, LO_REGNUM); + fill_gregset (gregsetp, HI_REGNUM); + fill_gregset (gregsetp, PC_REGNUM); + fill_gregset (gregsetp, BADVADDR_REGNUM); + fill_gregset (gregsetp, PS_REGNUM); + fill_gregset (gregsetp, CAUSE_REGNUM); + + return; + } + + if (regno < 32) + { + src = ®isters[REGISTER_BYTE (regno)]; + dst = regp + regno + EF_REG0; + memcpy (dst, src, sizeof (elf_greg_t)); + return; + } + + regaddr = -1; + switch (regno) + { + case LO_REGNUM: + regaddr = EF_LO; + break; + case HI_REGNUM: + regaddr = EF_HI; + break; + case PC_REGNUM: + regaddr = EF_CP0_EPC; + break; + case BADVADDR_REGNUM: + regaddr = EF_CP0_BADVADDR; + break; + case PS_REGNUM: + regaddr = EF_CP0_STATUS; + break; + case CAUSE_REGNUM: + regaddr = EF_CP0_CAUSE; + break; + } + + if (regaddr != -1) + { + src = ®isters[REGISTER_BYTE (regno)]; + dst = regp + regaddr; + memcpy (dst, src, sizeof (elf_greg_t)); + } +} + +/* Likewise, unpack an elf_fpregset_t. */ + +void +supply_fpregset (elf_fpregset_t *fpregsetp) +{ + register int regi; + static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; + + for (regi = 0; regi < 32; regi++) + supply_register (FP0_REGNUM + regi, + (char *)(*fpregsetp + regi)); + + supply_register (FCRCS_REGNUM, (char *)(*fpregsetp + 32)); + + /* FIXME: how can we supply FCRIR_REGNUM? The ABI doesn't tell us. */ + supply_register (FCRIR_REGNUM, zerobuf); +} + +/* Likewise, pack one or all floating point registers into an + elf_fpregset_t. */ + +void +fill_fpregset (elf_fpregset_t *fpregsetp, int regno) +{ + char *from, *to; + + if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32)) + { + from = (char *) ®isters[REGISTER_BYTE (regno)]; + to = (char *) (*fpregsetp + regno - FP0_REGNUM); + memcpy (to, from, REGISTER_RAW_SIZE (regno - FP0_REGNUM)); + } + else if (regno == FCRCS_REGNUM) + { + from = (char *) ®isters[REGISTER_BYTE (regno)]; + to = (char *) (*fpregsetp + 32); + memcpy (to, from, REGISTER_RAW_SIZE (regno)); + } + else if (regno == -1) + { + int regi; + + for (regi = 0; regi < 32; regi++) + fill_fpregset (fpregsetp, FP0_REGNUM + regi); + fill_fpregset(fpregsetp, FCRCS_REGNUM); + } +} + +/* Map gdb internal register number to ptrace ``address''. + These ``addresses'' are normally defined in . */ + +CORE_ADDR +register_addr (int regno, CORE_ADDR blockend) +{ + int regaddr; + + if (regno < 0 || regno >= NUM_REGS) + error ("Bogon register number %d.", regno); + + if (regno < 32) + regaddr = regno; + else if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32)) + regaddr = FPR_BASE + (regno - FP0_REGNUM); + else if (regno == PC_REGNUM) + regaddr = PC; + else if (regno == CAUSE_REGNUM) + regaddr = CAUSE; + else if (regno == BADVADDR_REGNUM) + regaddr = BADVADDR; + else if (regno == LO_REGNUM) + regaddr = MMLO; + else if (regno == HI_REGNUM) + regaddr = MMHI; + else if (regno == FCRCS_REGNUM) + regaddr = FPC_CSR; + else if (regno == FCRIR_REGNUM) + regaddr = FPC_EIR; + else + error ("Unknowable register number %d.", regno); + + return regaddr; +} + +/* Use a local version of this function to get the correct types for + regsets, until multi-arch core support is ready. */ + +static void +fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR reg_addr) +{ + elf_gregset_t gregset; + elf_fpregset_t fpregset; + + if (which == 0) + { + if (core_reg_size != sizeof (gregset)) + { + warning ("wrong size gregset struct in core file"); + } + else + { + memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset)); + supply_gregset (&gregset); + } + } + else if (which == 2) + { + if (core_reg_size != sizeof (fpregset)) + { + warning ("wrong size fpregset struct in core file"); + } + else + { + memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset)); + supply_fpregset (&fpregset); + } + } +} + +/* Register that we are able to handle ELF file formats using standard + procfs "regset" structures. */ + +static struct core_fns regset_core_fns = +{ + bfd_target_elf_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + +/* Fetch (and possibly build) an appropriate link_map_offsets + structure for native Linux/MIPS targets using the struct offsets + defined in link.h (but without actual reference to that file). + + This makes it possible to access Linux/MIPS shared libraries from a + GDB that was not built on an Linux/MIPS host (for cross debugging). */ + +struct link_map_offsets * +mips_linux_svr4_fetch_link_map_offsets (void) +{ + static struct link_map_offsets lmo; + static struct link_map_offsets *lmp = NULL; + + if (lmp == NULL) + { + lmp = &lmo; + + lmo.r_debug_size = 8; /* The actual size is 20 bytes, but + this is all we need. */ + lmo.r_map_offset = 4; + lmo.r_map_size = 4; + + lmo.link_map_size = 20; + + lmo.l_addr_offset = 0; + lmo.l_addr_size = 4; + + lmo.l_name_offset = 4; + lmo.l_name_size = 4; + + lmo.l_next_offset = 12; + lmo.l_next_size = 4; + + lmo.l_prev_offset = 16; + lmo.l_prev_size = 4; + } + + return lmp; +} + +void +_initialize_mips_linux_tdep () +{ + add_core_fns (®set_core_fns); +}