/* Native support code for PPC AIX, for GDB the GNU debugger.
- Copyright (C) 2006-2012 Free Software Foundation, Inc.
+ Copyright (C) 2006-2013 Free Software Foundation, Inc.
Free Software Foundation, Inc.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
+#include <string.h>
#include "gdb_assert.h"
#include "osabi.h"
#include "regcache.h"
#include "breakpoint.h"
#include "rs6000-tdep.h"
#include "ppc-tdep.h"
+#include "rs6000-aix-tdep.h"
#include "exceptions.h"
-
-/* Hook for determining the TOC address when calling functions in the
- inferior under AIX. The initialization code in rs6000-nat.c sets
- this hook to point to find_toc_address. */
-
-CORE_ADDR (*rs6000_find_toc_address_hook) (CORE_ADDR) = NULL;
+#include "xcoffread.h"
+#include "solib.h"
+#include "solib-aix.h"
+#include "xml-utils.h"
/* If the kernel has to deliver a signal, it pushes a sigcontext
structure on the stack and then calls the signal handler, passing
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
-
/* Floating point arguments are passed in fpr's, as well as gpr's.
There are 13 fpr's reserved for passing parameters. At this point
- there is no way we would run out of them. */
+ there is no way we would run out of them.
+
+ Always store the floating point value using the register's
+ floating-point format. */
+ const int fp_regnum = tdep->ppc_fp0_regnum + 1 + f_argno;
+ gdb_byte reg_val[MAX_REGISTER_SIZE];
+ struct type *reg_type = register_type (gdbarch, fp_regnum);
gdb_assert (len <= 8);
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + 1 + f_argno,
- value_contents (arg));
+ convert_typed_floating (value_contents (arg), type,
+ reg_val, reg_type);
+ regcache_cooked_write (regcache, fp_regnum, reg_val);
++f_argno;
}
breakpoint. */
regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr);
- /* Set the TOC register, get the value from the objfile reader
- which, in turn, gets it from the VMAP table. */
- if (rs6000_find_toc_address_hook != NULL)
- {
- CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (func_addr);
- regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, tocvalue);
- }
+ /* Set the TOC register value. */
+ regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum,
+ solib_aix_get_toc_value (func_addr));
target_store_registers (regcache, -1);
return sp;
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- gdb_byte buf[8];
/* The calling convention this function implements assumes the
processor has floating-point registers. We shouldn't be using it
return 1;
}
+/* Implement the "auto_wide_charset" gdbarch method for this platform. */
+
+static const char *
+rs6000_aix_auto_wide_charset (void)
+{
+ return "UTF-16";
+}
+
+/* Implement an osabi sniffer for RS6000/AIX.
+
+ This function assumes that ABFD's flavour is XCOFF. In other words,
+ it should be registered as a sniffer for bfd_target_xcoff_flavour
+ objfiles only. A failed assertion will be raised if this condition
+ is not met. */
+
static enum gdb_osabi
rs6000_aix_osabi_sniffer (bfd *abfd)
{
-
- if (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour);
- return GDB_OSABI_AIX;
+ gdb_assert (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour);
+
+ /* The only noticeable difference between Lynx178 XCOFF files and
+ AIX XCOFF files comes from the fact that there are no shared
+ libraries on Lynx178. On AIX, we are betting that an executable
+ linked with no shared library will never exist. */
+ if (xcoff_get_n_import_files (abfd) <= 0)
+ return GDB_OSABI_UNKNOWN;
+
+ return GDB_OSABI_AIX;
+}
+
+/* A structure encoding the offset and size of a field within
+ a struct. */
+
+struct field_info
+{
+ int offset;
+ int size;
+};
- return GDB_OSABI_UNKNOWN;
+/* A structure describing the layout of all the fields of interest
+ in AIX's struct ld_info. Each field in this struct corresponds
+ to the field of the same name in struct ld_info. */
+
+struct ld_info_desc
+{
+ struct field_info ldinfo_next;
+ struct field_info ldinfo_fd;
+ struct field_info ldinfo_textorg;
+ struct field_info ldinfo_textsize;
+ struct field_info ldinfo_dataorg;
+ struct field_info ldinfo_datasize;
+ struct field_info ldinfo_filename;
+};
+
+/* The following data has been generated by compiling and running
+ the following program on AIX 5.3. */
+
+#if 0
+#include <stddef.h>
+#include <stdio.h>
+#define __LDINFO_PTRACE32__
+#define __LDINFO_PTRACE64__
+#include <sys/ldr.h>
+
+#define pinfo(type,member) \
+ { \
+ struct type ldi = {0}; \
+ \
+ printf (" {%d, %d},\t/* %s */\n", \
+ offsetof (struct type, member), \
+ sizeof (ldi.member), \
+ #member); \
+ } \
+ while (0)
+
+int
+main (void)
+{
+ printf ("static const struct ld_info_desc ld_info32_desc =\n{\n");
+ pinfo (__ld_info32, ldinfo_next);
+ pinfo (__ld_info32, ldinfo_fd);
+ pinfo (__ld_info32, ldinfo_textorg);
+ pinfo (__ld_info32, ldinfo_textsize);
+ pinfo (__ld_info32, ldinfo_dataorg);
+ pinfo (__ld_info32, ldinfo_datasize);
+ pinfo (__ld_info32, ldinfo_filename);
+ printf ("};\n");
+
+ printf ("\n");
+
+ printf ("static const struct ld_info_desc ld_info64_desc =\n{\n");
+ pinfo (__ld_info64, ldinfo_next);
+ pinfo (__ld_info64, ldinfo_fd);
+ pinfo (__ld_info64, ldinfo_textorg);
+ pinfo (__ld_info64, ldinfo_textsize);
+ pinfo (__ld_info64, ldinfo_dataorg);
+ pinfo (__ld_info64, ldinfo_datasize);
+ pinfo (__ld_info64, ldinfo_filename);
+ printf ("};\n");
+
+ return 0;
+}
+#endif /* 0 */
+
+/* Layout of the 32bit version of struct ld_info. */
+
+static const struct ld_info_desc ld_info32_desc =
+{
+ {0, 4}, /* ldinfo_next */
+ {4, 4}, /* ldinfo_fd */
+ {8, 4}, /* ldinfo_textorg */
+ {12, 4}, /* ldinfo_textsize */
+ {16, 4}, /* ldinfo_dataorg */
+ {20, 4}, /* ldinfo_datasize */
+ {24, 2}, /* ldinfo_filename */
+};
+
+/* Layout of the 64bit version of struct ld_info. */
+
+static const struct ld_info_desc ld_info64_desc =
+{
+ {0, 4}, /* ldinfo_next */
+ {8, 4}, /* ldinfo_fd */
+ {16, 8}, /* ldinfo_textorg */
+ {24, 8}, /* ldinfo_textsize */
+ {32, 8}, /* ldinfo_dataorg */
+ {40, 8}, /* ldinfo_datasize */
+ {48, 2}, /* ldinfo_filename */
+};
+
+/* A structured representation of one entry read from the ld_info
+ binary data provided by the AIX loader. */
+
+struct ld_info
+{
+ ULONGEST next;
+ int fd;
+ CORE_ADDR textorg;
+ ULONGEST textsize;
+ CORE_ADDR dataorg;
+ ULONGEST datasize;
+ char *filename;
+ char *member_name;
+};
+
+/* Return a struct ld_info object corresponding to the entry at
+ LDI_BUF.
+
+ Note that the filename and member_name strings still point
+ to the data in LDI_BUF. So LDI_BUF must not be deallocated
+ while the struct ld_info object returned is in use. */
+
+static struct ld_info
+rs6000_aix_extract_ld_info (struct gdbarch *gdbarch,
+ const gdb_byte *ldi_buf)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+ const struct ld_info_desc desc
+ = tdep->wordsize == 8 ? ld_info64_desc : ld_info32_desc;
+ struct ld_info info;
+
+ info.next = extract_unsigned_integer (ldi_buf + desc.ldinfo_next.offset,
+ desc.ldinfo_next.size,
+ byte_order);
+ info.fd = extract_signed_integer (ldi_buf + desc.ldinfo_fd.offset,
+ desc.ldinfo_fd.size,
+ byte_order);
+ info.textorg = extract_typed_address (ldi_buf + desc.ldinfo_textorg.offset,
+ ptr_type);
+ info.textsize
+ = extract_unsigned_integer (ldi_buf + desc.ldinfo_textsize.offset,
+ desc.ldinfo_textsize.size,
+ byte_order);
+ info.dataorg = extract_typed_address (ldi_buf + desc.ldinfo_dataorg.offset,
+ ptr_type);
+ info.datasize
+ = extract_unsigned_integer (ldi_buf + desc.ldinfo_datasize.offset,
+ desc.ldinfo_datasize.size,
+ byte_order);
+ info.filename = (char *) ldi_buf + desc.ldinfo_filename.offset;
+ info.member_name = info.filename + strlen (info.filename) + 1;
+
+ return info;
+}
+
+/* Append to OBJSTACK an XML string description of the shared library
+ corresponding to LDI, following the TARGET_OBJECT_LIBRARIES_AIX
+ format. */
+
+static void
+rs6000_aix_shared_library_to_xml (struct ld_info *ldi,
+ struct obstack *obstack)
+{
+ char *p;
+
+ obstack_grow_str (obstack, "<library name=\"");
+ p = xml_escape_text (ldi->filename);
+ obstack_grow_str (obstack, p);
+ xfree (p);
+ obstack_grow_str (obstack, "\"");
+
+ if (ldi->member_name[0] != '\0')
+ {
+ obstack_grow_str (obstack, " member=\"");
+ p = xml_escape_text (ldi->member_name);
+ obstack_grow_str (obstack, p);
+ xfree (p);
+ obstack_grow_str (obstack, "\"");
+ }
+
+ obstack_grow_str (obstack, " text_addr=\"");
+ obstack_grow_str (obstack, core_addr_to_string (ldi->textorg));
+ obstack_grow_str (obstack, "\"");
+
+ obstack_grow_str (obstack, " text_size=\"");
+ obstack_grow_str (obstack, pulongest (ldi->textsize));
+ obstack_grow_str (obstack, "\"");
+
+ obstack_grow_str (obstack, " data_addr=\"");
+ obstack_grow_str (obstack, core_addr_to_string (ldi->dataorg));
+ obstack_grow_str (obstack, "\"");
+
+ obstack_grow_str (obstack, " data_size=\"");
+ obstack_grow_str (obstack, pulongest (ldi->datasize));
+ obstack_grow_str (obstack, "\"");
+
+ obstack_grow_str (obstack, "></library>");
+}
+
+/* Convert the ld_info binary data provided by the AIX loader into
+ an XML representation following the TARGET_OBJECT_LIBRARIES_AIX
+ format.
+
+ LDI_BUF is a buffer containing the ld_info data.
+ READBUF, OFFSET and LEN follow the same semantics as target_ops'
+ to_xfer_partial target_ops method.
+
+ If CLOSE_LDINFO_FD is nonzero, then this routine also closes
+ the ldinfo_fd file descriptor. This is useful when the ldinfo
+ data is obtained via ptrace, as ptrace opens a file descriptor
+ for each and every entry; but we cannot use this descriptor
+ as the consumer of the XML library list might live in a different
+ process. */
+
+LONGEST
+rs6000_aix_ld_info_to_xml (struct gdbarch *gdbarch, const gdb_byte *ldi_buf,
+ gdb_byte *readbuf, ULONGEST offset, LONGEST len,
+ int close_ldinfo_fd)
+{
+ struct obstack obstack;
+ const char *buf;
+ LONGEST len_avail;
+
+ obstack_init (&obstack);
+ obstack_grow_str (&obstack, "<library-list-aix version=\"1.0\">\n");
+
+ while (1)
+ {
+ struct ld_info ldi = rs6000_aix_extract_ld_info (gdbarch, ldi_buf);
+
+ rs6000_aix_shared_library_to_xml (&ldi, &obstack);
+ if (close_ldinfo_fd)
+ close (ldi.fd);
+
+ if (!ldi.next)
+ break;
+ ldi_buf = ldi_buf + ldi.next;
+ }
+
+ obstack_grow_str0 (&obstack, "</library-list-aix>\n");
+
+ buf = obstack_finish (&obstack);
+ len_avail = strlen (buf);
+ if (offset >= len_avail)
+ len= 0;
+ else
+ {
+ if (len > len_avail - offset)
+ len = len_avail - offset;
+ memcpy (readbuf, buf + offset, len);
+ }
+
+ obstack_free (&obstack, NULL);
+ return len;
+}
+
+/* Implement the core_xfer_shared_libraries_aix gdbarch method. */
+
+static LONGEST
+rs6000_aix_core_xfer_shared_libraries_aix (struct gdbarch *gdbarch,
+ gdb_byte *readbuf,
+ ULONGEST offset,
+ LONGEST len)
+{
+ struct bfd_section *ldinfo_sec;
+ int ldinfo_size;
+ gdb_byte *ldinfo_buf;
+ struct cleanup *cleanup;
+ LONGEST result;
+
+ ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
+ if (ldinfo_sec == NULL)
+ error (_("cannot find .ldinfo section from core file: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ ldinfo_size = bfd_get_section_size (ldinfo_sec);
+
+ ldinfo_buf = xmalloc (ldinfo_size);
+ cleanup = make_cleanup (xfree, ldinfo_buf);
+
+ if (! bfd_get_section_contents (core_bfd, ldinfo_sec,
+ ldinfo_buf, 0, ldinfo_size))
+ error (_("unable to read .ldinfo section from core file: %s"),
+ bfd_errmsg (bfd_get_error ()));
+
+ result = rs6000_aix_ld_info_to_xml (gdbarch, ldinfo_buf, readbuf,
+ offset, len, 0);
+
+ do_cleanups (cleanup);
+ return result;
}
static void
/* Core file support. */
set_gdbarch_regset_from_core_section
(gdbarch, rs6000_aix_regset_from_core_section);
+ set_gdbarch_core_xfer_shared_libraries_aix
+ (gdbarch, rs6000_aix_core_xfer_shared_libraries_aix);
if (tdep->wordsize == 8)
tdep->lr_frame_offset = 16;
set_gdbarch_frame_red_zone_size (gdbarch, 224);
else
set_gdbarch_frame_red_zone_size (gdbarch, 0);
+
+ set_gdbarch_auto_wide_charset (gdbarch, rs6000_aix_auto_wide_charset);
+
+ set_solib_ops (gdbarch, &solib_aix_so_ops);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
projects / deliverable / binutils-gdb.git / blobdiff