X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Frs6000-nat.c;h=ca333f216d8e8167b18e1c2462ff6c6deebb0afd;hb=3263bceb4f76b783a44aeea417a9fb69dab26ee5;hp=8c3f54606f2db5730a7865600b5479dd1ef6ce83;hpb=8ac244b433d5d36b787afd36f7144069e7d837e0;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c index 8c3f54606f..ca333f216d 100644 --- a/gdb/rs6000-nat.c +++ b/gdb/rs6000-nat.c @@ -1,7 +1,6 @@ /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. - Copyright (C) 1986-1987, 1989, 1991-2004, 2007-2012 Free Software - Foundation, Inc. + Copyright (C) 1986-2016 Free Software Foundation, Inc. This file is part of GDB. @@ -22,12 +21,10 @@ #include "inferior.h" #include "target.h" #include "gdbcore.h" -#include "xcoffsolib.h" #include "symfile.h" #include "objfiles.h" #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ #include "bfd.h" -#include "exceptions.h" #include "gdb-stabs.h" #include "regcache.h" #include "arch-utils.h" @@ -35,6 +32,7 @@ #include "inf-ptrace.h" #include "ppc-tdep.h" #include "rs6000-tdep.h" +#include "rs6000-aix-tdep.h" #include "exec.h" #include "observer.h" #include "xcoffread.h" @@ -42,17 +40,16 @@ #include #include -#include #include #include #include #include #include -#include #include #include -#include "gdb_stat.h" +#include +#include "gdb_bfd.h" #include #define __LDINFO_PTRACE32__ /* for __ld_info32 */ #define __LDINFO_PTRACE64__ /* for __ld_info64 */ @@ -66,7 +63,7 @@ /* 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 +#if defined (__ld_info32) || defined (__ld_info64) # define ARCH3264 #endif @@ -75,64 +72,10 @@ #ifndef ARCH3264 # define ARCH64() 0 #else -# define ARCH64() (register_size (target_gdbarch, 0) == 8) +# define ARCH64() (register_size (target_gdbarch (), 0) == 8) #endif -/* 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); - -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 exec_one_dummy_insn (struct regcache *); - -extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); +static target_xfer_partial_ftype rs6000_xfer_shared_libraries; /* Given REGNO, a gdb register number, return the corresponding number suitable for use as a ptrace() parameter. Return -1 if @@ -181,7 +124,11 @@ regmap (struct gdbarch *gdbarch, int regno, int *isfloat) static int rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) { +#ifdef HAVE_PTRACE64 + int ret = ptrace64 (req, id, (uintptr_t) addr, data, buf); +#else int ret = ptrace (req, id, (int *)addr, data, buf); +#endif #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); @@ -195,7 +142,11 @@ static int rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) { #ifdef ARCH3264 +# ifdef HAVE_PTRACE64 + int ret = ptrace64 (req, id, addr, data, buf); +# else int ret = ptracex (req, id, addr, data, buf); +# endif #else int ret = 0; #endif @@ -222,7 +173,7 @@ fetch_register (struct regcache *regcache, int regno) /* Floating-point registers. */ if (isfloat) - rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); + rs6000_ptrace32 (PT_READ_FPR, ptid_get_pid (inferior_ptid), addr, nr, 0); /* Bogus register number. */ else if (nr < 0) @@ -238,14 +189,15 @@ fetch_register (struct regcache *regcache, int regno) else { if (!ARCH64 ()) - *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), + *addr = rs6000_ptrace32 (PT_READ_GPR, ptid_get_pid (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, &buf); + rs6000_ptrace64 (PT_READ_GPR, ptid_get_pid (inferior_ptid), + nr, 0, &buf); if (register_size (gdbarch, regno) == 8) memcpy (addr, &buf, 8); else @@ -284,7 +236,7 @@ store_register (struct regcache *regcache, int regno) /* Floating-point registers. */ if (isfloat) - rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); + rs6000_ptrace32 (PT_WRITE_FPR, ptid_get_pid (inferior_ptid), addr, nr, 0); /* Bogus register number. */ else if (nr < 0) @@ -298,19 +250,11 @@ store_register (struct regcache *regcache, int regno) /* Fixed-point registers. */ else { - if (regno == gdbarch_sp_regnum (gdbarch)) - /* 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 (regcache); - /* 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), + rs6000_ptrace32 (PT_WRITE_GPR, ptid_get_pid (inferior_ptid), (int *) nr, *addr, 0); else { @@ -321,7 +265,8 @@ store_register (struct regcache *regcache, int regno) memcpy (&buf, addr, 8); else buf = *addr; - rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); + rs6000_ptrace64 (PT_WRITE_GPR, ptid_get_pid (inferior_ptid), + nr, 0, &buf); } } @@ -417,22 +362,23 @@ rs6000_store_inferior_registers (struct target_ops *ops, } } +/* Implement the to_xfer_partial target_ops method. */ -/* Attempt a transfer all LEN bytes starting at OFFSET between the - inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. - Return the number of bytes actually transferred. */ - -static LONGEST +static enum target_xfer_status rs6000_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, - ULONGEST offset, LONGEST len) + ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) { pid_t pid = ptid_get_pid (inferior_ptid); int arch64 = ARCH64 (); switch (object) { + case TARGET_OBJECT_LIBRARIES_AIX: + return rs6000_xfer_shared_libraries (ops, object, annex, + readbuf, writebuf, + offset, len, xfered_len); case TARGET_OBJECT_MEMORY: { union @@ -490,7 +436,7 @@ rs6000_xfer_partial (struct target_ops *ops, enum target_object object, (int *) (uintptr_t) rounded_offset, buffer.word, NULL); if (errno) - return 0; + return TARGET_XFER_EOF; } if (readbuf) @@ -504,18 +450,19 @@ rs6000_xfer_partial (struct target_ops *ops, enum target_object object, (int *)(uintptr_t)rounded_offset, 0, NULL); if (errno) - return 0; + return TARGET_XFER_EOF; /* Copy appropriate bytes out of the buffer. */ memcpy (readbuf, buffer.byte + (offset - rounded_offset), partial_len); } - return partial_len; + *xfered_len = (ULONGEST) partial_len; + return TARGET_XFER_OK; } default: - return -1; + return TARGET_XFER_E_IO; } } @@ -575,402 +522,8 @@ rs6000_wait (struct target_ops *ops, return pid_to_ptid (pid); } - -/* 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 (struct regcache *regcache) -{ -#define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 - - struct gdbarch *gdbarch = get_regcache_arch (regcache); - int ret, status, pid; - CORE_ADDR prev_pc; - void *bp; - - /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We - assume that this address will never be executed again by the real - code. */ - - bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); - - /* 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 = regcache_read_pc (regcache); - regcache_write_pc (regcache, 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 = waitpid (PIDGET (inferior_ptid), &status, 0); - } - while (pid != PIDGET (inferior_ptid)); - - regcache_write_pc (regcache, prev_pc); - deprecated_remove_raw_breakpoint (gdbarch, bp); -} -/* 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) -{ - 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_N_SECTION_OFFSETS (objfile->num_sections)); - - 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, 0); - new_symfile_objfile (obj, 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; - char *mem, *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 = xstrdup (mem); - - 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 = gdb_bfd_openr (filename, gnutarget); - else - abfd = gdb_bfd_fdopenr (filename, gnutarget, fd); - if (!abfd) - { - warning (_("Could not open `%s' as an executable file: %s"), - filename, 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 = gdb_bfd_openr_next_archived_file (abfd, last))) - { - if (strcmp (mem, last->filename) == 0) - break; - } - - if (!last) - { - warning (_("\"%s\": member \"%s\" missing."), filename, mem); - gdb_bfd_unref (abfd); - return NULL; - } - - if (!bfd_check_format (last, bfd_object)) - { - warning (_("\"%s\": member \"%s\" not in executable format: %s."), - filename, mem, bfd_errmsg (bfd_get_error ())); - gdb_bfd_unref (last); - gdb_bfd_unref (abfd); - return NULL; - } - - vp = map_vmap (last, abfd); - } - else - { - warning (_("\"%s\": not in executable format: %s."), - filename, bfd_errmsg (bfd_get_error ())); - gdb_bfd_unref (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; - 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] == '/' && strcmp (name, vp->name) != 0) - || (memb[0] && strcmp (memb, vp->member) != 0)) - 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 (vp->objfile) - observer_notify_new_objfile (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); - gdb_assert (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; - struct target_section_table *table = target_get_section_table (&exec_ops); - - if (execbfd == exec_bfd) - return; - - execbfd = exec_bfd; - - if (!vmap || !table->sections) - error (_("vmap_exec: vmap or table->sections == 0.")); - - for (i = 0; &table->sections[i] < table->sections_end; i++) - { - if (strcmp (".text", table->sections[i].the_bfd_section->name) == 0) - { - table->sections[i].addr += vmap->tstart - vmap->tvma; - table->sections[i].endaddr += vmap->tstart - vmap->tvma; - } - else if (strcmp (".data", table->sections[i].the_bfd_section->name) == 0) - { - table->sections[i].addr += vmap->dstart - vmap->dvma; - table->sections[i].endaddr += vmap->dstart - vmap->dvma; - } - else if (strcmp (".bss", table->sections[i].the_bfd_section->name) == 0) - { - table->sections[i].addr += vmap->dstart - vmap->dvma; - table->sections[i].endaddr += vmap->dstart - vmap->dvma; - } - } -} - /* Set the current architecture from the host running GDB. Called when starting a child process. */ @@ -1026,195 +579,82 @@ rs6000_create_inferior (struct target_ops * ops, char *exec_file, _("rs6000_create_inferior: failed " "to select architecture")); } - -/* xcoff_relocate_symtab - hook for symbol table relocation. - - This is only applicable to live processes, and is a no-op when - debugging a core file. */ - -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; - - /* Nothing to do if we are debugging a core file. */ - if (!target_has_execution) - return; - - 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 +/* Shared Object support. */ - 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. */ +/* Return the LdInfo data for the given process. Raises an error + if the data could not be obtained. -/* Relocate symtabs and read in shared library info, based on symbols - from the core file. */ + The returned value must be deallocated after use. */ -void -xcoff_relocate_core (struct target_ops *target) +static gdb_byte * +rs6000_ptrace_ldinfo (ptid_t ptid) { - struct bfd_section *ldinfo_sec; - int offset = 0; - LdInfo *ldi; - struct vmap *vp; - int arch64 = ARCH64 (); + const int pid = ptid_get_pid (ptid); + int ldi_size = 1024; + gdb_byte *ldi = xmalloc (ldi_size); + int rc = -1; - /* 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) + while (1) { - 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; + if (ARCH64 ()) + rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, ldi_size, + NULL); else - ldi->l32.ldinfo_fd = -1; + rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, ldi_size, NULL); - /* The first ldinfo is for the exec file, allocated elsewhere. */ - if (offset == 0 && vmap != NULL) - vp = vmap; - else - vp = add_vmap (ldi); + if (rc != -1) + break; /* Success, we got the entire ld_info data. */ - /* Process next shared library upon error. */ - offset += LDI_NEXT (ldi, arch64); - if (vp == NULL) - continue; + if (errno != ENOMEM) + perror_with_name (_("ptrace ldinfo")); - vmap_secs (vp, ldi, arch64); + /* ldi is not big enough. Double it and try again. */ + ldi_size *= 2; + ldi = xrealloc (ldi, ldi_size); + } - /* Unless this is the exec file, - add our sections to the section table for the core target. */ - if (vp != vmap) - { - struct target_section *stp; + return ldi; +} - stp = deprecated_core_resize_section_table (2); +/* Implement the to_xfer_partial target_ops method for + TARGET_OBJECT_LIBRARIES_AIX objects. */ - 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++; +static enum target_xfer_status +rs6000_xfer_shared_libraries + (struct target_ops *ops, enum target_object object, + const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, + ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) +{ + gdb_byte *ldi_buf; + ULONGEST result; + struct cleanup *cleanup; - stp->bfd = vp->bfd; - stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); - stp->addr = vp->dstart; - stp->endaddr = vp->dend; - } + /* This function assumes that it is being run with a live process. + Core files are handled via gdbarch. */ + gdb_assert (target_has_execution); - vmap_symtab (vp); + if (writebuf) + return TARGET_XFER_E_IO; - if (vp != vmap && vp->objfile) - observer_notify_new_objfile (vp->objfile); - } - while (LDI_NEXT (ldi, arch64) != 0); - vmap_exec (); - breakpoint_re_set (); - do_cleanups (old); -} - -/* 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. */ + ldi_buf = rs6000_ptrace_ldinfo (inferior_ptid); + gdb_assert (ldi_buf != NULL); + cleanup = make_cleanup (xfree, ldi_buf); + result = rs6000_aix_ld_info_to_xml (target_gdbarch (), ldi_buf, + readbuf, offset, len, 1); + xfree (ldi_buf); -static CORE_ADDR -find_toc_address (CORE_ADDR pc) -{ - struct vmap *vp; + do_cleanups (cleanup); - for (vp = vmap; vp; vp = vp->nxt) + if (result == 0) + return TARGET_XFER_EOF; + else { - if (pc >= vp->tstart && pc < vp->tend) - { - /* vp->objfile is only NULL for the exec file. */ - return vp->dstart + xcoff_get_toc_offset (vp->objfile == NULL - ? symfile_objfile - : vp->objfile); - } + *xfered_len = result; + return TARGET_XFER_OK; } - error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); } - void _initialize_rs6000_nat (void); @@ -1234,8 +674,4 @@ _initialize_rs6000_nat (void) t->to_wait = rs6000_wait; add_target (t); - - /* 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; }