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Diffstat (limited to 'gdb/rs6000-nat.c')
| -rw-r--r-- | gdb/rs6000-nat.c | 1224 |
1 files changed, 0 insertions, 1224 deletions
diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c deleted file mode 100644 index 65256f4..0000000 --- a/gdb/rs6000-nat.c +++ /dev/null @@ -1,1224 +0,0 @@ -/* IBM RS/6000 native-dependent code for GDB, the GNU debugger. - Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000, 2001, 2002 - 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 "inferior.h" -#include "target.h" -#include "gdbcore.h" -#include "xcoffsolib.h" -#include "symfile.h" -#include "objfiles.h" -#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ -#include "bfd.h" -#include "gdb-stabs.h" -#include "regcache.h" -#include "arch-utils.h" -#include "language.h" /* for local_hex_string(). */ -#include "ppc-tdep.h" - -#include <sys/ptrace.h> -#include <sys/reg.h> - -#include <sys/param.h> -#include <sys/dir.h> -#include <sys/user.h> -#include <signal.h> -#include <sys/ioctl.h> -#include <fcntl.h> -#include <errno.h> - -#include <a.out.h> -#include <sys/file.h> -#include "gdb_stat.h" -#include <sys/core.h> -#define __LDINFO_PTRACE32__ /* for __ld_info32 */ -#define __LDINFO_PTRACE64__ /* for __ld_info64 */ -#include <sys/ldr.h> -#include <sys/systemcfg.h> - -/* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for - debugging 32-bit and 64-bit processes. Define a typedef and macros for - accessing fields in the appropriate structures. */ - -/* In 32-bit compilation mode (which is the only mode from which ptrace() - works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ - -#ifdef __ld_info32 -# define ARCH3264 -#endif - -/* Return whether the current architecture is 64-bit. */ - -#ifndef ARCH3264 -# define ARCH64() 0 -#else -# define ARCH64() (REGISTER_RAW_SIZE (0) == 8) -#endif - -/* Union of 32-bit and 64-bit ".reg" core file sections. */ - -typedef union { -#ifdef ARCH3264 - struct __context64 r64; -#else - struct mstsave r64; -#endif - struct mstsave r32; -} CoreRegs; - -/* Union of 32-bit and 64-bit versions of ld_info. */ - -typedef union { -#ifndef ARCH3264 - struct ld_info l32; - struct ld_info l64; -#else - struct __ld_info32 l32; - struct __ld_info64 l64; -#endif -} LdInfo; - -/* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), - declare and initialize a variable named VAR suitable for use as the arch64 - parameter to the various LDI_*() macros. */ - -#ifndef ARCH3264 -# define ARCH64_DECL(var) -#else -# define ARCH64_DECL(var) int var = ARCH64 () -#endif - -/* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process - otherwise. This technique only works for FIELDs with the same data type in - 32-bit and 64-bit versions of ld_info. */ - -#ifndef ARCH3264 -# define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field -#else -# define LDI_FIELD(ldi, arch64, field) \ - (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) -#endif - -/* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit - process otherwise. */ - -#define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) -#define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) -#define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) - -extern struct vmap *map_vmap (bfd * bf, bfd * arch); - -extern struct target_ops exec_ops; - -static void vmap_exec (void); - -static void vmap_ldinfo (LdInfo *); - -static struct vmap *add_vmap (LdInfo *); - -static int objfile_symbol_add (void *); - -static void vmap_symtab (struct vmap *); - -static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); - -static void exec_one_dummy_insn (void); - -extern void -fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); - -/* Given REGNO, a gdb register number, return the corresponding - number suitable for use as a ptrace() parameter. Return -1 if - there's no suitable mapping. Also, set the int pointed to by - ISFLOAT to indicate whether REGNO is a floating point register. */ - -static int -regmap (int regno, int *isfloat) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - *isfloat = 0; - if (tdep->ppc_gp0_regnum <= regno && regno <= tdep->ppc_gplast_regnum) - return regno; - else if (FP0_REGNUM <= regno && regno <= FPLAST_REGNUM) - { - *isfloat = 1; - return regno - FP0_REGNUM + FPR0; - } - else if (regno == PC_REGNUM) - return IAR; - else if (regno == tdep->ppc_ps_regnum) - return MSR; - else if (regno == tdep->ppc_cr_regnum) - return CR; - else if (regno == tdep->ppc_lr_regnum) - return LR; - else if (regno == tdep->ppc_ctr_regnum) - return CTR; - else if (regno == tdep->ppc_xer_regnum) - return XER; - else if (regno == tdep->ppc_fpscr_regnum) - return FPSCR; - else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) - return MQ; - else - return -1; -} - -/* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ - -static int -rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) -{ - int ret = ptrace (req, id, (int *)addr, data, buf); -#if 0 - printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", - req, id, (unsigned int)addr, data, (unsigned int)buf, ret); -#endif - return ret; -} - -/* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ - -static int -rs6000_ptrace64 (int req, int id, long long addr, int data, int *buf) -{ -#ifdef ARCH3264 - int ret = ptracex (req, id, addr, data, buf); -#else - int ret = 0; -#endif -#if 0 - printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", - req, id, addr, data, (unsigned int)buf, ret); -#endif - return ret; -} - -/* Fetch register REGNO from the inferior. */ - -static void -fetch_register (int regno) -{ - int *addr = alloca (MAX_REGISTER_RAW_SIZE); - int nr, isfloat; - - /* Retrieved values may be -1, so infer errors from errno. */ - errno = 0; - - nr = regmap (regno, &isfloat); - - /* Floating-point registers. */ - if (isfloat) - rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); - - /* Bogus register number. */ - else if (nr < 0) - { - if (regno >= NUM_REGS) - fprintf_unfiltered (gdb_stderr, - "gdb error: register no %d not implemented.\n", - regno); - return; - } - - /* Fixed-point registers. */ - else - { - if (!ARCH64 ()) - *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0); - else - { - /* PT_READ_GPR requires the buffer parameter to point to long long, - even if the register is really only 32 bits. */ - long long buf; - rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); - if (REGISTER_RAW_SIZE (regno) == 8) - memcpy (addr, &buf, 8); - else - *addr = buf; - } - } - - if (!errno) - supply_register (regno, (char *) addr); - else - { -#if 0 - /* FIXME: this happens 3 times at the start of each 64-bit program. */ - perror ("ptrace read"); -#endif - errno = 0; - } -} - -/* Store register REGNO back into the inferior. */ - -static void -store_register (int regno) -{ - int *addr = alloca (MAX_REGISTER_RAW_SIZE); - int nr, isfloat; - - /* Fetch the register's value from the register cache. */ - regcache_collect (regno, addr); - - /* -1 can be a successful return value, so infer errors from errno. */ - errno = 0; - - nr = regmap (regno, &isfloat); - - /* Floating-point registers. */ - if (isfloat) - rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); - - /* Bogus register number. */ - else if (nr < 0) - { - if (regno >= NUM_REGS) - fprintf_unfiltered (gdb_stderr, - "gdb error: register no %d not implemented.\n", - regno); - } - - /* Fixed-point registers. */ - else - { - if (regno == SP_REGNUM) - /* Execute one dummy instruction (which is a breakpoint) in inferior - process to give kernel a chance to do internal housekeeping. - Otherwise the following ptrace(2) calls will mess up user stack - since kernel will get confused about the bottom of the stack - (%sp). */ - exec_one_dummy_insn (); - - /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, - the register's value is passed by value, but for 64-bit inferiors, - the address of a buffer containing the value is passed. */ - if (!ARCH64 ()) - rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0); - else - { - /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte - area, even if the register is really only 32 bits. */ - long long buf; - if (REGISTER_RAW_SIZE (regno) == 8) - memcpy (&buf, addr, 8); - else - buf = *addr; - rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); - } - } - - if (errno) - { - perror ("ptrace write"); - errno = 0; - } -} - -/* Read from the inferior all registers if REGNO == -1 and just register - REGNO otherwise. */ - -void -fetch_inferior_registers (int regno) -{ - if (regno != -1) - fetch_register (regno); - - else - { - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* Read 32 general purpose registers. */ - for (regno = tdep->ppc_gp0_regnum; - regno <= tdep->ppc_gplast_regnum; - regno++) - { - fetch_register (regno); - } - - /* Read general purpose floating point registers. */ - for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) - fetch_register (regno); - - /* Read special registers. */ - fetch_register (PC_REGNUM); - fetch_register (tdep->ppc_ps_regnum); - fetch_register (tdep->ppc_cr_regnum); - fetch_register (tdep->ppc_lr_regnum); - fetch_register (tdep->ppc_ctr_regnum); - fetch_register (tdep->ppc_xer_regnum); - fetch_register (tdep->ppc_fpscr_regnum); - if (tdep->ppc_mq_regnum >= 0) - fetch_register (tdep->ppc_mq_regnum); - } -} - -/* Store our register values back into the inferior. - If REGNO is -1, do this for all registers. - Otherwise, REGNO specifies which register (so we can save time). */ - -void -store_inferior_registers (int regno) -{ - if (regno != -1) - store_register (regno); - - else - { - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* Write general purpose registers first. */ - for (regno = tdep->ppc_gp0_regnum; - regno <= tdep->ppc_gplast_regnum; - regno++) - { - store_register (regno); - } - - /* Write floating point registers. */ - for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) - store_register (regno); - - /* Write special registers. */ - store_register (PC_REGNUM); - store_register (tdep->ppc_ps_regnum); - store_register (tdep->ppc_cr_regnum); - store_register (tdep->ppc_lr_regnum); - store_register (tdep->ppc_ctr_regnum); - store_register (tdep->ppc_xer_regnum); - store_register (tdep->ppc_fpscr_regnum); - if (tdep->ppc_mq_regnum >= 0) - store_register (tdep->ppc_mq_regnum); - } -} - -/* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child - process, which is 64-bit if ARCH64 and 32-bit otherwise. Return - success. */ - -static int -read_word (CORE_ADDR from, int *to, int arch64) -{ - /* Retrieved values may be -1, so infer errors from errno. */ - errno = 0; - - if (arch64) - *to = rs6000_ptrace64 (PT_READ_I, PIDGET (inferior_ptid), from, 0, NULL); - else - *to = rs6000_ptrace32 (PT_READ_I, PIDGET (inferior_ptid), (int *)(long) from, - 0, NULL); - - return !errno; -} - -/* Copy LEN bytes to or from inferior's memory starting at MEMADDR - to debugger memory starting at MYADDR. Copy to inferior if - WRITE is nonzero. - - Returns the length copied, which is either the LEN argument or zero. - This xfer function does not do partial moves, since child_ops - doesn't allow memory operations to cross below us in the target stack - anyway. */ - -int -child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, - int write, struct mem_attrib *attrib, - struct target_ops *target) -{ - /* Round starting address down to 32-bit word boundary. */ - int mask = sizeof (int) - 1; - CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask; - - /* Round ending address up to 32-bit word boundary. */ - int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask) - / sizeof (int); - - /* Allocate word transfer buffer. */ - /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe - because it uses alloca to allocate a buffer of arbitrary size. - For very large xfers, this could crash GDB's stack. */ - int *buf = (int *) alloca (count * sizeof (int)); - - int arch64 = ARCH64 (); - int i; - - if (!write) - { - /* Retrieve memory a word at a time. */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - if (!read_word (addr, buf + i, arch64)) - return 0; - QUIT; - } - - /* Copy memory to supplied buffer. */ - addr -= count * sizeof (int); - memcpy (myaddr, (char *)buf + (memaddr - addr), len); - } - else - { - /* Fetch leading memory needed for alignment. */ - if (addr < memaddr) - if (!read_word (addr, buf, arch64)) - return 0; - - /* Fetch trailing memory needed for alignment. */ - if (addr + count * sizeof (int) > memaddr + len) - if (!read_word (addr, buf + count - 1, arch64)) - return 0; - - /* Copy supplied data into memory buffer. */ - memcpy ((char *)buf + (memaddr - addr), myaddr, len); - - /* Store memory one word at a time. */ - for (i = 0, errno = 0; i < count; i++, addr += sizeof (int)) - { - if (arch64) - rs6000_ptrace64 (PT_WRITE_D, PIDGET (inferior_ptid), addr, buf[i], NULL); - else - rs6000_ptrace32 (PT_WRITE_D, PIDGET (inferior_ptid), (int *)(long) addr, - buf[i], NULL); - - if (errno) - return 0; - QUIT; - } - } - - return len; -} - -/* Execute one dummy breakpoint instruction. This way we give the kernel - a chance to do some housekeeping and update inferior's internal data, - including u_area. */ - -static void -exec_one_dummy_insn (void) -{ -#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 - - char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ - int ret, status, pid; - CORE_ADDR prev_pc; - - /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We - assume that this address will never be executed again by the real - code. */ - - target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); - - /* You might think this could be done with a single ptrace call, and - you'd be correct for just about every platform I've ever worked - on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- - the inferior never hits the breakpoint (it's also worth noting - powerpc-ibm-aix4.1.3 works correctly). */ - prev_pc = read_pc (); - write_pc (DUMMY_INSN_ADDR); - if (ARCH64 ()) - ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); - else - ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL); - - if (ret != 0) - perror ("pt_continue"); - - do - { - pid = wait (&status); - } - while (pid != PIDGET (inferior_ptid)); - - write_pc (prev_pc); - target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); -} - -/* Fetch registers from the register section in core bfd. */ - -static void -fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, - int which, CORE_ADDR reg_addr) -{ - CoreRegs *regs; - int regi; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - if (which != 0) - { - fprintf_unfiltered - (gdb_stderr, - "Gdb error: unknown parameter to fetch_core_registers().\n"); - return; - } - - regs = (CoreRegs *) core_reg_sect; - - /* Put the register values from the core file section in the regcache. */ - - if (ARCH64 ()) - { - for (regi = 0; regi < 32; regi++) - supply_register (regi, (char *) ®s->r64.gpr[regi]); - - for (regi = 0; regi < 32; regi++) - supply_register (FP0_REGNUM + regi, (char *) ®s->r64.fpr[regi]); - - supply_register (PC_REGNUM, (char *) ®s->r64.iar); - supply_register (tdep->ppc_ps_regnum, (char *) ®s->r64.msr); - supply_register (tdep->ppc_cr_regnum, (char *) ®s->r64.cr); - supply_register (tdep->ppc_lr_regnum, (char *) ®s->r64.lr); - supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r64.ctr); - supply_register (tdep->ppc_xer_regnum, (char *) ®s->r64.xer); - supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r64.fpscr); - } - else - { - for (regi = 0; regi < 32; regi++) - supply_register (regi, (char *) ®s->r32.gpr[regi]); - - for (regi = 0; regi < 32; regi++) - supply_register (FP0_REGNUM + regi, (char *) ®s->r32.fpr[regi]); - - supply_register (PC_REGNUM, (char *) ®s->r32.iar); - supply_register (tdep->ppc_ps_regnum, (char *) ®s->r32.msr); - supply_register (tdep->ppc_cr_regnum, (char *) ®s->r32.cr); - supply_register (tdep->ppc_lr_regnum, (char *) ®s->r32.lr); - supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r32.ctr); - supply_register (tdep->ppc_xer_regnum, (char *) ®s->r32.xer); - supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r32.fpscr); - if (tdep->ppc_mq_regnum >= 0) - supply_register (tdep->ppc_mq_regnum, (char *) ®s->r32.mq); - } -} - - -/* Copy information about text and data sections from LDI to VP for a 64-bit - process if ARCH64 and for a 32-bit process otherwise. */ - -static void -vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) -{ - if (arch64) - { - vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; - vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; - vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; - vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; - } - else - { - vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; - vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; - vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; - vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; - } - - /* The run time loader maps the file header in addition to the text - section and returns a pointer to the header in ldinfo_textorg. - Adjust the text start address to point to the real start address - of the text section. */ - vp->tstart += vp->toffs; -} - -/* handle symbol translation on vmapping */ - -static void -vmap_symtab (struct vmap *vp) -{ - register struct objfile *objfile; - struct section_offsets *new_offsets; - int i; - - objfile = vp->objfile; - if (objfile == NULL) - { - /* OK, it's not an objfile we opened ourselves. - Currently, that can only happen with the exec file, so - relocate the symbols for the symfile. */ - if (symfile_objfile == NULL) - return; - objfile = symfile_objfile; - } - else if (!vp->loaded) - /* If symbols are not yet loaded, offsets are not yet valid. */ - return; - - new_offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); - - for (i = 0; i < objfile->num_sections; ++i) - new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); - - /* The symbols in the object file are linked to the VMA of the section, - relocate them VMA relative. */ - new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; - new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; - new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; - - objfile_relocate (objfile, new_offsets); -} - -/* Add symbols for an objfile. */ - -static int -objfile_symbol_add (void *arg) -{ - struct objfile *obj = (struct objfile *) arg; - - syms_from_objfile (obj, NULL, 0, 0); - new_symfile_objfile (obj, 0, 0); - return 1; -} - -/* Add symbols for a vmap. Return zero upon error. */ - -int -vmap_add_symbols (struct vmap *vp) -{ - if (catch_errors (objfile_symbol_add, vp->objfile, - "Error while reading shared library symbols:\n", - RETURN_MASK_ALL)) - { - /* Note this is only done if symbol reading was successful. */ - vp->loaded = 1; - vmap_symtab (vp); - return 1; - } - return 0; -} - -/* Add a new vmap entry based on ldinfo() information. - - If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a - core file), the caller should set it to -1, and we will open the file. - - Return the vmap new entry. */ - -static struct vmap * -add_vmap (LdInfo *ldi) -{ - bfd *abfd, *last; - register char *mem, *objname, *filename; - struct objfile *obj; - struct vmap *vp; - int fd; - ARCH64_DECL (arch64); - - /* This ldi structure was allocated using alloca() in - xcoff_relocate_symtab(). Now we need to have persistent object - and member names, so we should save them. */ - - filename = LDI_FILENAME (ldi, arch64); - mem = filename + strlen (filename) + 1; - mem = savestring (mem, strlen (mem)); - objname = savestring (filename, strlen (filename)); - - fd = LDI_FD (ldi, arch64); - if (fd < 0) - /* Note that this opens it once for every member; a possible - enhancement would be to only open it once for every object. */ - abfd = bfd_openr (objname, gnutarget); - else - abfd = bfd_fdopenr (objname, gnutarget, fd); - if (!abfd) - { - warning ("Could not open `%s' as an executable file: %s", - objname, bfd_errmsg (bfd_get_error ())); - return NULL; - } - - /* make sure we have an object file */ - - if (bfd_check_format (abfd, bfd_object)) - vp = map_vmap (abfd, 0); - - else if (bfd_check_format (abfd, bfd_archive)) - { - last = 0; - /* FIXME??? am I tossing BFDs? bfd? */ - while ((last = bfd_openr_next_archived_file (abfd, last))) - if (STREQ (mem, last->filename)) - break; - - if (!last) - { - warning ("\"%s\": member \"%s\" missing.", objname, mem); - bfd_close (abfd); - return NULL; - } - - if (!bfd_check_format (last, bfd_object)) - { - warning ("\"%s\": member \"%s\" not in executable format: %s.", - objname, mem, bfd_errmsg (bfd_get_error ())); - bfd_close (last); - bfd_close (abfd); - return NULL; - } - - vp = map_vmap (last, abfd); - } - else - { - warning ("\"%s\": not in executable format: %s.", - objname, bfd_errmsg (bfd_get_error ())); - bfd_close (abfd); - return NULL; - } - obj = allocate_objfile (vp->bfd, 0); - vp->objfile = obj; - - /* Always add symbols for the main objfile. */ - if (vp == vmap || auto_solib_add) - vmap_add_symbols (vp); - return vp; -} - -/* update VMAP info with ldinfo() information - Input is ptr to ldinfo() results. */ - -static void -vmap_ldinfo (LdInfo *ldi) -{ - struct stat ii, vi; - register struct vmap *vp; - int got_one, retried; - int got_exec_file = 0; - uint next; - int arch64 = ARCH64 (); - - /* For each *ldi, see if we have a corresponding *vp. - If so, update the mapping, and symbol table. - If not, add an entry and symbol table. */ - - do - { - char *name = LDI_FILENAME (ldi, arch64); - char *memb = name + strlen (name) + 1; - int fd = LDI_FD (ldi, arch64); - - retried = 0; - - if (fstat (fd, &ii) < 0) - { - /* The kernel sets ld_info to -1, if the process is still using the - object, and the object is removed. Keep the symbol info for the - removed object and issue a warning. */ - warning ("%s (fd=%d) has disappeared, keeping its symbols", - name, fd); - continue; - } - retry: - for (got_one = 0, vp = vmap; vp; vp = vp->nxt) - { - struct objfile *objfile; - - /* First try to find a `vp', which is the same as in ldinfo. - If not the same, just continue and grep the next `vp'. If same, - relocate its tstart, tend, dstart, dend values. If no such `vp' - found, get out of this for loop, add this ldi entry as a new vmap - (add_vmap) and come back, find its `vp' and so on... */ - - /* The filenames are not always sufficient to match on. */ - - if ((name[0] == '/' && !STREQ (name, vp->name)) - || (memb[0] && !STREQ (memb, vp->member))) - continue; - - /* See if we are referring to the same file. - We have to check objfile->obfd, symfile.c:reread_symbols might - have updated the obfd after a change. */ - objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; - if (objfile == NULL - || objfile->obfd == NULL - || bfd_stat (objfile->obfd, &vi) < 0) - { - warning ("Unable to stat %s, keeping its symbols", name); - continue; - } - - if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) - continue; - - if (!retried) - close (fd); - - ++got_one; - - /* Found a corresponding VMAP. Remap! */ - - vmap_secs (vp, ldi, arch64); - - /* The objfile is only NULL for the exec file. */ - if (vp->objfile == NULL) - got_exec_file = 1; - - /* relocate symbol table(s). */ - vmap_symtab (vp); - - /* Announce new object files. Doing this after symbol relocation - makes aix-thread.c's job easier. */ - if (target_new_objfile_hook && vp->objfile) - target_new_objfile_hook (vp->objfile); - - /* There may be more, so we don't break out of the loop. */ - } - - /* if there was no matching *vp, we must perforce create the sucker(s) */ - if (!got_one && !retried) - { - add_vmap (ldi); - ++retried; - goto retry; - } - } - while ((next = LDI_NEXT (ldi, arch64)) - && (ldi = (void *) (next + (char *) ldi))); - - /* If we don't find the symfile_objfile anywhere in the ldinfo, it - is unlikely that the symbol file is relocated to the proper - address. And we might have attached to a process which is - running a different copy of the same executable. */ - if (symfile_objfile != NULL && !got_exec_file) - { - warning ("Symbol file %s\nis not mapped; discarding it.\n\ -If in fact that file has symbols which the mapped files listed by\n\ -\"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ -\"add-symbol-file\" commands (note that you must take care of relocating\n\ -symbols to the proper address).", - symfile_objfile->name); - free_objfile (symfile_objfile); - symfile_objfile = NULL; - } - breakpoint_re_set (); -} - -/* As well as symbol tables, exec_sections need relocation. After - the inferior process' termination, there will be a relocated symbol - table exist with no corresponding inferior process. At that time, we - need to use `exec' bfd, rather than the inferior process's memory space - to look up symbols. - - `exec_sections' need to be relocated only once, as long as the exec - file remains unchanged. - */ - -static void -vmap_exec (void) -{ - static bfd *execbfd; - int i; - - if (execbfd == exec_bfd) - return; - - execbfd = exec_bfd; - - if (!vmap || !exec_ops.to_sections) - error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); - - for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) - { - if (STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) - { - exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; - exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; - } - else if (STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) - { - exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; - exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; - } - else if (STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) - { - exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; - exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; - } - } -} - -/* Set the current architecture from the host running GDB. Called when - starting a child process. */ - -static void -set_host_arch (int pid) -{ - enum bfd_architecture arch; - unsigned long mach; - bfd abfd; - struct gdbarch_info info; - - if (__power_rs ()) - { - arch = bfd_arch_rs6000; - mach = bfd_mach_rs6k; - } - else - { - arch = bfd_arch_powerpc; - mach = bfd_mach_ppc; - } - - /* FIXME: schauer/2002-02-25: - We don't know if we are executing a 32 or 64 bit executable, - and have no way to pass the proper word size to rs6000_gdbarch_init. - So we have to avoid switching to a new architecture, if the architecture - matches already. - Blindly calling rs6000_gdbarch_init used to work in older versions of - GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to - determine the wordsize. */ - if (exec_bfd) - { - const struct bfd_arch_info *exec_bfd_arch_info; - - exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); - if (arch == exec_bfd_arch_info->arch) - return; - } - - bfd_default_set_arch_mach (&abfd, arch, mach); - - gdbarch_info_init (&info); - info.bfd_arch_info = bfd_get_arch_info (&abfd); - - if (!gdbarch_update_p (info)) - { - internal_error (__FILE__, __LINE__, - "set_host_arch: failed to select architecture"); - } -} - - -/* xcoff_relocate_symtab - hook for symbol table relocation. - also reads shared libraries.. */ - -void -xcoff_relocate_symtab (unsigned int pid) -{ - int load_segs = 64; /* number of load segments */ - int rc; - LdInfo *ldi = NULL; - int arch64 = ARCH64 (); - int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); - int size; - - do - { - size = load_segs * ldisize; - ldi = (void *) xrealloc (ldi, size); - -#if 0 - /* According to my humble theory, AIX has some timing problems and - when the user stack grows, kernel doesn't update stack info in time - and ptrace calls step on user stack. That is why we sleep here a - little, and give kernel to update its internals. */ - usleep (36000); -#endif - - if (arch64) - rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); - else - rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); - - if (rc == -1) - { - if (errno == ENOMEM) - load_segs *= 2; - else - perror_with_name ("ptrace ldinfo"); - } - else - { - vmap_ldinfo (ldi); - vmap_exec (); /* relocate the exec and core sections as well. */ - } - } while (rc == -1); - if (ldi) - xfree (ldi); -} - -/* Core file stuff. */ - -/* Relocate symtabs and read in shared library info, based on symbols - from the core file. */ - -void -xcoff_relocate_core (struct target_ops *target) -{ - sec_ptr ldinfo_sec; - int offset = 0; - LdInfo *ldi; - struct vmap *vp; - int arch64 = ARCH64 (); - - /* Size of a struct ld_info except for the variable-length filename. */ - int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); - - /* Allocated size of buffer. */ - int buffer_size = nonfilesz; - char *buffer = xmalloc (buffer_size); - struct cleanup *old = make_cleanup (free_current_contents, &buffer); - - ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); - if (ldinfo_sec == NULL) - { - bfd_err: - fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", - bfd_errmsg (bfd_get_error ())); - do_cleanups (old); - return; - } - do - { - int i; - int names_found = 0; - - /* Read in everything but the name. */ - if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, - offset, nonfilesz) == 0) - goto bfd_err; - - /* Now the name. */ - i = nonfilesz; - do - { - if (i == buffer_size) - { - buffer_size *= 2; - buffer = xrealloc (buffer, buffer_size); - } - if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], - offset + i, 1) == 0) - goto bfd_err; - if (buffer[i++] == '\0') - ++names_found; - } - while (names_found < 2); - - ldi = (LdInfo *) buffer; - - /* Can't use a file descriptor from the core file; need to open it. */ - if (arch64) - ldi->l64.ldinfo_fd = -1; - else - ldi->l32.ldinfo_fd = -1; - - /* The first ldinfo is for the exec file, allocated elsewhere. */ - if (offset == 0 && vmap != NULL) - vp = vmap; - else - vp = add_vmap (ldi); - - /* Process next shared library upon error. */ - offset += LDI_NEXT (ldi, arch64); - if (vp == NULL) - continue; - - vmap_secs (vp, ldi, arch64); - - /* Unless this is the exec file, - add our sections to the section table for the core target. */ - if (vp != vmap) - { - struct section_table *stp; - - target_resize_to_sections (target, 2); - stp = target->to_sections_end - 2; - - stp->bfd = vp->bfd; - stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); - stp->addr = vp->tstart; - stp->endaddr = vp->tend; - stp++; - - stp->bfd = vp->bfd; - stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); - stp->addr = vp->dstart; - stp->endaddr = vp->dend; - } - - vmap_symtab (vp); - - if (target_new_objfile_hook && vp != vmap && vp->objfile) - target_new_objfile_hook (vp->objfile); - } - while (LDI_NEXT (ldi, arch64) != 0); - vmap_exec (); - breakpoint_re_set (); - do_cleanups (old); -} - -int -kernel_u_size (void) -{ - return (sizeof (struct user)); -} - -/* Under AIX, we have to pass the correct TOC pointer to a function - when calling functions in the inferior. - We try to find the relative toc offset of the objfile containing PC - and add the current load address of the data segment from the vmap. */ - -static CORE_ADDR -find_toc_address (CORE_ADDR pc) -{ - struct vmap *vp; - extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ - - for (vp = vmap; vp; vp = vp->nxt) - { - if (pc >= vp->tstart && pc < vp->tend) - { - /* vp->objfile is only NULL for the exec file. */ - return vp->dstart + get_toc_offset (vp->objfile == NULL - ? symfile_objfile - : vp->objfile); - } - } - error ("Unable to find TOC entry for pc %s\n", local_hex_string (pc)); -} - -/* Register that we are able to handle rs6000 core file formats. */ - -static struct core_fns rs6000_core_fns = -{ - bfd_target_xcoff_flavour, /* core_flavour */ - default_check_format, /* check_format */ - default_core_sniffer, /* core_sniffer */ - fetch_core_registers, /* core_read_registers */ - NULL /* next */ -}; - -void -_initialize_core_rs6000 (void) -{ - /* Initialize hook in rs6000-tdep.c for determining the TOC address when - calling functions in the inferior. */ - rs6000_find_toc_address_hook = find_toc_address; - - /* Initialize hook in rs6000-tdep.c to set the current architecture when - starting a child process. */ - rs6000_set_host_arch_hook = set_host_arch; - - add_core_fns (&rs6000_core_fns); -} |