From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5844 invoked by alias); 14 Feb 2006 21:10:18 -0000 Received: (qmail 5836 invoked by uid 22791); 14 Feb 2006 21:10:16 -0000 X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (66.187.233.31) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 14 Feb 2006 21:10:15 +0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id k1ELAD3u010869 for ; Tue, 14 Feb 2006 16:10:13 -0500 Received: from pobox.corp.redhat.com (pobox.corp.redhat.com [172.16.52.156]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id k1ELAD126292 for ; Tue, 14 Feb 2006 16:10:13 -0500 Received: from localhost.localdomain (vpn50-139.rdu.redhat.com [172.16.50.139]) by pobox.corp.redhat.com (8.12.8/8.12.8) with ESMTP id k1ELACJA023258 for ; Tue, 14 Feb 2006 16:10:12 -0500 Received: from ironwood.lan (ironwood.lan [192.168.64.8]) by localhost.localdomain (8.12.11/8.12.10) with ESMTP id k1ELB705005374 for ; Tue, 14 Feb 2006 14:11:07 -0700 Date: Tue, 14 Feb 2006 21:10:00 -0000 From: Kevin Buettner To: gdb-patches@sources.redhat.com Subject: [RFC] Add FR-V Linux core file support Message-ID: <20060214141016.4e2e56d8@ironwood.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2006-02/txt/msg00311.txt.bz2 The patch below adds core file support for FR-V running either GNU/Linux or uClinux. The interesting part of this patch is the bit which causes the main executable to get relocated. I thought at first that I would need to add a new hook which does for core files what SOLIB_CREATE_INFERIOR_HOOK does for processes, but this turned out to not be necessary. I was able to handle the case that I care about by adding a suitable call to frv_current_sos(). I was surprised, however, that we had (apparently) never run into this problem before. Comments? * frv-linux-tdep.c (gdbcore.h, regcache.h, regset.h, gdb_string.h): Include. (FRV_ELF_NGREG, FRV_PT_PSR, FRV_PT_ISR, FRV_PT_CCR, FRV_PT_CCCR) (FRV_PT_LR, FRV_PT_LCR, FRV_PT_PC, FRV_PT_GNER0, FRV_PT_GNER1) (FRV_PT_IACC0H, FRV_PT_IACC0L, FRV_PT_GR, FRV_PT_TBR) (FRV_PT_EXEC_FDPIC_LOADMAP, FRV_PT_INTERP_FDPIC_LOADMAP): Define. (frv_elf_greg_t, frv_elf_gregset_t, frv_elf_fpreg_t) (frv_elf_fpregset_t): Define types. (frv_linux_supply_gregset, frv_linux_supply_fpregset) (frv_linux_regset_from_core_section: New functions. (frv_linux_gregset, frv_linux_fpregset): New static globals. (frv_linux_init_abi): Register the `regset_from_core_section' method. * Makefile.in (frv-linux-tdep.o): Update dependencies. * solib-frv.c (frv_current_sos): Relocate main executable after loading core file. (frv_clear_solib): Clean up space associated with `main_executable_lm_info'. * config/frv/frv.mt (TDEPFILES): Add corelow.o to this list. Index: Makefile.in =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D RCS file: /cvs/src/src/gdb/Makefile.in,v retrieving revision 1.783 diff -u -p -r1.783 Makefile.in --- Makefile.in 2 Feb 2006 02:26:48 -0000 1.783 +++ Makefile.in 14 Feb 2006 20:44:37 -0000 @@ -1958,9 +1958,10 @@ frame.o: frame.c $(defs_h) $(frame_h) $( $(command_h) $(gdbcmd_h) $(observer_h) $(objfiles_h) $(exceptions_h) frame-unwind.o: frame-unwind.c $(defs_h) $(frame_h) $(frame_unwind_h) \ $(gdb_assert_h) $(dummy_frame_h) $(gdb_obstack_h) -frv-linux-tdep.o: frv-linux-tdep.c $(defs_h) $(target_h) $(frame_h) \ - $(osabi_h) $(elf_bfd_h) $(elf_frv_h) $(frv_tdep_h) $(trad_frame_h) \ - $(frame_unwind_h) +frv-linux-tdep.o: frv-linux-tdep.c $(defs_h) $(gdbcore_h) $(target_h) \ + $(frame_h) $(osabi_h) $(regcache_h) $(elf_bfd_h) $(elf_frv_h) \ + $(frv_tdep_h) $(trad_frame_h) $(frame_unwind_h) $(regset_h) \ + $(gdb_string_h) frv-tdep.o: frv-tdep.c $(defs_h) $(gdb_string_h) $(inferior_h) $(gdbcore_h= ) \ $(arch_utils_h) $(regcache_h) $(frame_h) $(frame_unwind_h) \ $(frame_base_h) $(trad_frame_h) $(dis_asm_h) $(gdb_assert_h) \ Index: frv-linux-tdep.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D RCS file: /cvs/src/src/gdb/frv-linux-tdep.c,v retrieving revision 1.9 diff -u -p -r1.9 frv-linux-tdep.c --- frv-linux-tdep.c 17 Dec 2005 22:33:59 -0000 1.9 +++ frv-linux-tdep.c 14 Feb 2006 20:44:37 -0000 @@ -20,14 +20,18 @@ Boston, MA 02110-1301, USA. */ =20 #include "defs.h" +#include "gdbcore.h" #include "target.h" #include "frame.h" #include "osabi.h" +#include "regcache.h" #include "elf-bfd.h" #include "elf/frv.h" #include "frv-tdep.h" #include "trad-frame.h" #include "frame-unwind.h" +#include "regset.h" +#include "gdb_string.h" =20 /* Define the size (in bytes) of an FR-V instruction. */ static const int frv_instr_size =3D 4; @@ -329,11 +333,162 @@ frv_linux_sigtramp_frame_sniffer (struct return NULL; } =20 +=0C +/* The FRV kernel defines ELF_NGREG as 46. We add 2 in order to include + the loadmap addresses in the register set. (See below for more info.) = */ +#define FRV_ELF_NGREG (46 + 2) +typedef unsigned char frv_elf_greg_t[4]; +typedef struct { frv_elf_greg_t reg[FRV_ELF_NGREG]; } frv_elf_gregset_t; + +typedef unsigned char frv_elf_fpreg_t[4]; +typedef struct +{ + frv_elf_fpreg_t fr[64]; + frv_elf_fpreg_t fner[2]; + frv_elf_fpreg_t msr[2]; + frv_elf_fpreg_t acc[8]; + unsigned char accg[8]; + frv_elf_fpreg_t fsr[1]; +} frv_elf_fpregset_t; + +/* Constants for accessing elements of frv_elf_gregset_t. */ + +#define FRV_PT_PSR 0 +#define FRV_PT_ISR 1 +#define FRV_PT_CCR 2 +#define FRV_PT_CCCR 3 +#define FRV_PT_LR 4 +#define FRV_PT_LCR 5 +#define FRV_PT_PC 6 +#define FRV_PT_GNER0 10 +#define FRV_PT_GNER1 11 +#define FRV_PT_IACC0H 12 +#define FRV_PT_IACC0L 13 + +/* Note: Only 32 of the GRs will be found in the corefile. */ +#define FRV_PT_GR(j) ( 14 + (j)) /* GRj for 0<=3Dj<=3D63. */ + +#define FRV_PT_TBR FRV_PT_GR(0) /* gr0 is always 0, so TBR is stuffed + there. */ + +/* Technically, the loadmap addresses are not part of `pr_reg' as + found in the elf_prstatus struct. The fields which communicate the + loadmap address appear (by design) immediately after `pr_reg' + though, and the BFD function elf32_frv_grok_prstatus() has been + implemented to include these fields in the register section that it + extracts from the core file. So, for our purposes, they may be + viewed as registers. */ + +#define FRV_PT_EXEC_FDPIC_LOADMAP 46 +#define FRV_PT_INTERP_FDPIC_LOADMAP 47 + + +/* Unpack an frv_elf_gregset_t into GDB's register cache. */ + +static void=20 +frv_linux_supply_gregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + int regi; + char zerobuf[MAX_REGISTER_SIZE]; + const frv_elf_gregset_t *gregsetp =3D gregs; + + memset (zerobuf, 0, MAX_REGISTER_SIZE); + + /* gr0 always contains 0. Also, the kernel passes the TBR value in + this slot. */ + regcache_raw_supply (regcache, first_gpr_regnum, zerobuf); + + for (regi =3D first_gpr_regnum + 1; regi <=3D last_gpr_regnum; regi++) + { + if (regi >=3D first_gpr_regnum + 32) + regcache_raw_supply (regcache, regi, zerobuf); + else + regcache_raw_supply (regcache, regi, + gregsetp->reg[FRV_PT_GR (regi - first_gpr_regnum)]); + } + + regcache_raw_supply (regcache, pc_regnum, gregsetp->reg[FRV_PT_PC]); + regcache_raw_supply (regcache, psr_regnum, gregsetp->reg[FRV_PT_PSR]); + regcache_raw_supply (regcache, ccr_regnum, gregsetp->reg[FRV_PT_CCR]); + regcache_raw_supply (regcache, cccr_regnum, gregsetp->reg[FRV_PT_CCCR]); + regcache_raw_supply (regcache, lr_regnum, gregsetp->reg[FRV_PT_LR]); + regcache_raw_supply (regcache, lcr_regnum, gregsetp->reg[FRV_PT_LCR]); + regcache_raw_supply (regcache, gner0_regnum, gregsetp->reg[FRV_PT_GNER0]= ); + regcache_raw_supply (regcache, gner1_regnum, gregsetp->reg[FRV_PT_GNER1]= ); + regcache_raw_supply (regcache, tbr_regnum, gregsetp->reg[FRV_PT_TBR]); + regcache_raw_supply (regcache, fdpic_loadmap_exec_regnum, + gregsetp->reg[FRV_PT_EXEC_FDPIC_LOADMAP]); + regcache_raw_supply (regcache, fdpic_loadmap_interp_regnum, + gregsetp->reg[FRV_PT_INTERP_FDPIC_LOADMAP]); +} + +/* Unpack an frv_elf_fpregset_t into GDB's register cache. */ + +static void +frv_linux_supply_fpregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + int regi; + const frv_elf_fpregset_t *fpregsetp =3D gregs; + + for (regi =3D first_fpr_regnum; regi <=3D last_fpr_regnum; regi++) + regcache_raw_supply (regcache, regi, fpregsetp->fr[regi - first_fpr_re= gnum]); + + regcache_raw_supply (regcache, fner0_regnum, fpregsetp->fner[0]); + regcache_raw_supply (regcache, fner1_regnum, fpregsetp->fner[1]); + + regcache_raw_supply (regcache, msr0_regnum, fpregsetp->msr[0]); + regcache_raw_supply (regcache, msr1_regnum, fpregsetp->msr[1]); + + for (regi =3D acc0_regnum; regi <=3D acc7_regnum; regi++) + regcache_raw_supply (regcache, regi, fpregsetp->acc[regi - acc0_regnum= ]); + + regcache_raw_supply (regcache, accg0123_regnum, fpregsetp->accg); + regcache_raw_supply (regcache, accg4567_regnum, fpregsetp->accg + 4); + + regcache_raw_supply (regcache, fsr0_regnum, fpregsetp->fsr[0]); +} + +/* FRV Linux register sets. */ + +static struct regset frv_linux_gregset =3D +{ + NULL, + frv_linux_supply_gregset +}; + +static struct regset frv_linux_fpregset =3D +{ + NULL, + frv_linux_supply_fpregset +}; + +static const struct regset * +frv_linux_regset_from_core_section (struct gdbarch *gdbarch, + const char *sect_name, size_t sect_size) +{ + if (strcmp (sect_name, ".reg") =3D=3D 0=20 + && sect_size >=3D sizeof (frv_elf_gregset_t)) + return &frv_linux_gregset; + + if (strcmp (sect_name, ".reg2") =3D=3D 0=20 + && sect_size >=3D sizeof (frv_elf_fpregset_t)) + return &frv_linux_fpregset; + + return NULL; +} + +=0C 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);= =20 + set_gdbarch_regset_from_core_section (gdbarch, + frv_linux_regset_from_core_section= ); } =20 static enum gdb_osabi Index: solib-frv.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D RCS file: /cvs/src/src/gdb/solib-frv.c,v retrieving revision 1.12 diff -u -p -r1.12 solib-frv.c --- solib-frv.c 17 Dec 2005 22:34:02 -0000 1.12 +++ solib-frv.c 14 Feb 2006 20:44:37 -0000 @@ -421,6 +421,14 @@ frv_current_sos (void) struct so_list *sos_head =3D NULL; struct so_list **sos_next_ptr =3D &sos_head; =20 + /* Make sure that the main executable has been relocated. Normally + this is done by SOLIB_CREATE_INFERIOR_HOOK(), however, this hook + is not run when loading core files. Rather than create a new hook, + we'll do it here if necessary. */ + if (main_executable_lm_info =3D=3D 0 && core_bfd !=3D NULL) + frv_relocate_main_executable (); + + /* Fetch the GOT corresponding to the main executable. */ mgot =3D main_got (); =20 /* Locate the address of the first link map struct. */ @@ -960,6 +968,14 @@ frv_clear_solib (void) enable_break1_done =3D 0; enable_break2_done =3D 0; main_lm_addr =3D 0; + if (main_executable_lm_info !=3D 0) + { + xfree (main_executable_lm_info->map); + xfree (main_executable_lm_info->dyn_syms); + xfree (main_executable_lm_info->dyn_relocs); + xfree (main_executable_lm_info); + main_executable_lm_info =3D 0; + } } =20 static void Index: config/frv/frv.mt =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D RCS file: /cvs/src/src/gdb/config/frv/frv.mt,v retrieving revision 1.5 diff -u -p -r1.5 frv.mt --- config/frv/frv.mt 13 Sep 2004 20:55:39 -0000 1.5 +++ config/frv/frv.mt 14 Feb 2006 20:44:37 -0000 @@ -1,5 +1,5 @@ # Target: Fujitsu FRV processor -TDEPFILES=3D frv-tdep.o frv-linux-tdep.o solib.o solib-frv.o +TDEPFILES=3D frv-tdep.o frv-linux-tdep.o solib.o solib-frv.o corelow.o DEPRECATED_TM_FILE=3D tm-frv.h SIM_OBS =3D remote-sim.o SIM =3D ../sim/frv/libsim.a