/* Target-dependent code for GDB, the GNU debugger.
Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GDB.
#include "regset.h"
#include "solib-svr4.h"
#include "solib-spu.h"
+#include "solib.h"
+#include "solist.h"
#include "ppc-tdep.h"
#include "ppc-linux-tdep.h"
#include "trad-frame.h"
#include "observer.h"
#include "auxv.h"
#include "elf/common.h"
+#include "exceptions.h"
+#include "arch-utils.h"
+#include "spu-tdep.h"
+#include "xml-syscall.h"
+#include "linux-tdep.h"
#include "features/rs6000/powerpc-32l.c"
#include "features/rs6000/powerpc-altivec32l.c"
#include "features/rs6000/powerpc-isa205-vsx64l.c"
#include "features/rs6000/powerpc-e500l.c"
+/* The syscall's XML filename for PPC and PPC64. */
+#define XML_SYSCALL_FILENAME_PPC "syscalls/ppc-linux.xml"
+#define XML_SYSCALL_FILENAME_PPC64 "syscalls/ppc64-linux.xml"
/* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint
in much the same fashion as memory_remove_breakpoint in mem-break.c,
static struct core_regset_section ppc_linux_vsx_regset_sections[] =
{
- { ".reg", 268 },
- { ".reg2", 264 },
- { ".reg-ppc-vmx", 544 },
- { ".reg-ppc-vsx", 256 },
+ { ".reg", 48 * 4, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { ".reg-ppc-vmx", 544, "ppc Altivec" },
+ { ".reg-ppc-vsx", 256, "POWER7 VSX" },
{ NULL, 0}
};
static struct core_regset_section ppc_linux_vmx_regset_sections[] =
{
- { ".reg", 268 },
- { ".reg2", 264 },
- { ".reg-ppc-vmx", 544 },
+ { ".reg", 48 * 4, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { ".reg-ppc-vmx", 544, "ppc Altivec" },
{ NULL, 0}
};
static struct core_regset_section ppc_linux_fp_regset_sections[] =
{
- { ".reg", 268 },
- { ".reg2", 264 },
+ { ".reg", 48 * 4, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { NULL, 0}
+};
+
+static struct core_regset_section ppc64_linux_vsx_regset_sections[] =
+{
+ { ".reg", 48 * 8, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { ".reg-ppc-vmx", 544, "ppc Altivec" },
+ { ".reg-ppc-vsx", 256, "POWER7 VSX" },
+ { NULL, 0}
+};
+
+static struct core_regset_section ppc64_linux_vmx_regset_sections[] =
+{
+ { ".reg", 48 * 8, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { ".reg-ppc-vmx", 544, "ppc Altivec" },
+ { NULL, 0}
+};
+
+static struct core_regset_section ppc64_linux_fp_regset_sections[] =
+{
+ { ".reg", 48 * 8, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
{ NULL, 0}
};
&& register_size (gdbarch, PPC_TRAP_REGNUM) > 0;
}
+/* Return the current system call's number present in the
+ r0 register. When the function fails, it returns -1. */
+static LONGEST
+ppc_linux_get_syscall_number (struct gdbarch *gdbarch,
+ ptid_t ptid)
+{
+ struct regcache *regcache = get_thread_regcache (ptid);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct cleanup *cleanbuf;
+ /* The content of a register */
+ gdb_byte *buf;
+ /* The result */
+ LONGEST ret;
+
+ /* Make sure we're in a 32- or 64-bit machine */
+ gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8);
+
+ buf = (gdb_byte *) xmalloc (tdep->wordsize * sizeof (gdb_byte));
+
+ cleanbuf = make_cleanup (xfree, buf);
+
+ /* Getting the system call number from the register.
+ When dealing with PowerPC architecture, this information
+ is stored at 0th register. */
+ regcache_cooked_read (regcache, tdep->ppc_gp0_regnum, buf);
+
+ ret = extract_signed_integer (buf, tdep->wordsize, byte_order);
+ do_cleanups (cleanbuf);
+
+ return ret;
+}
+
static void
ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
}
}
+
+/* Cell/B.E. active SPE context tracking support. */
+
+static struct objfile *spe_context_objfile = NULL;
+static CORE_ADDR spe_context_lm_addr = 0;
+static CORE_ADDR spe_context_offset = 0;
+
+static ptid_t spe_context_cache_ptid;
+static CORE_ADDR spe_context_cache_address;
+
+/* Hook into inferior_created, solib_loaded, and solib_unloaded observers
+ to track whether we've loaded a version of libspe2 (as static or dynamic
+ library) that provides the __spe_current_active_context variable. */
+static void
+ppc_linux_spe_context_lookup (struct objfile *objfile)
+{
+ struct minimal_symbol *sym;
+
+ if (!objfile)
+ {
+ spe_context_objfile = NULL;
+ spe_context_lm_addr = 0;
+ spe_context_offset = 0;
+ spe_context_cache_ptid = minus_one_ptid;
+ spe_context_cache_address = 0;
+ return;
+ }
+
+ sym = lookup_minimal_symbol ("__spe_current_active_context", NULL, objfile);
+ if (sym)
+ {
+ spe_context_objfile = objfile;
+ spe_context_lm_addr = svr4_fetch_objfile_link_map (objfile);
+ spe_context_offset = SYMBOL_VALUE_ADDRESS (sym);
+ spe_context_cache_ptid = minus_one_ptid;
+ spe_context_cache_address = 0;
+ return;
+ }
+}
+
+static void
+ppc_linux_spe_context_inferior_created (struct target_ops *t, int from_tty)
+{
+ struct objfile *objfile;
+
+ ppc_linux_spe_context_lookup (NULL);
+ ALL_OBJFILES (objfile)
+ ppc_linux_spe_context_lookup (objfile);
+}
+
+static void
+ppc_linux_spe_context_solib_loaded (struct so_list *so)
+{
+ if (strstr (so->so_original_name, "/libspe") != NULL)
+ {
+ solib_read_symbols (so, 0);
+ ppc_linux_spe_context_lookup (so->objfile);
+ }
+}
+
+static void
+ppc_linux_spe_context_solib_unloaded (struct so_list *so)
+{
+ if (so->objfile == spe_context_objfile)
+ ppc_linux_spe_context_lookup (NULL);
+}
+
+/* Retrieve contents of the N'th element in the current thread's
+ linked SPE context list into ID and NPC. Return the address of
+ said context element, or 0 if not found. */
+static CORE_ADDR
+ppc_linux_spe_context (int wordsize, enum bfd_endian byte_order,
+ int n, int *id, unsigned int *npc)
+{
+ CORE_ADDR spe_context = 0;
+ gdb_byte buf[16];
+ int i;
+
+ /* Quick exit if we have not found __spe_current_active_context. */
+ if (!spe_context_objfile)
+ return 0;
+
+ /* Look up cached address of thread-local variable. */
+ if (!ptid_equal (spe_context_cache_ptid, inferior_ptid))
+ {
+ struct target_ops *target = ¤t_target;
+ volatile struct gdb_exception ex;
+
+ while (target && !target->to_get_thread_local_address)
+ target = find_target_beneath (target);
+ if (!target)
+ return 0;
+
+ TRY_CATCH (ex, RETURN_MASK_ERROR)
+ {
+ /* We do not call target_translate_tls_address here, because
+ svr4_fetch_objfile_link_map may invalidate the frame chain,
+ which must not do while inside a frame sniffer.
+
+ Instead, we have cached the lm_addr value, and use that to
+ directly call the target's to_get_thread_local_address. */
+ spe_context_cache_address
+ = target->to_get_thread_local_address (target, inferior_ptid,
+ spe_context_lm_addr,
+ spe_context_offset);
+ spe_context_cache_ptid = inferior_ptid;
+ }
+
+ if (ex.reason < 0)
+ return 0;
+ }
+
+ /* Read variable value. */
+ if (target_read_memory (spe_context_cache_address, buf, wordsize) == 0)
+ spe_context = extract_unsigned_integer (buf, wordsize, byte_order);
+
+ /* Cyle through to N'th linked list element. */
+ for (i = 0; i < n && spe_context; i++)
+ if (target_read_memory (spe_context + align_up (12, wordsize),
+ buf, wordsize) == 0)
+ spe_context = extract_unsigned_integer (buf, wordsize, byte_order);
+ else
+ spe_context = 0;
+
+ /* Read current context. */
+ if (spe_context
+ && target_read_memory (spe_context, buf, 12) != 0)
+ spe_context = 0;
+
+ /* Extract data elements. */
+ if (spe_context)
+ {
+ if (id)
+ *id = extract_signed_integer (buf, 4, byte_order);
+ if (npc)
+ *npc = extract_unsigned_integer (buf + 4, 4, byte_order);
+ }
+
+ return spe_context;
+}
+
+
+/* Cell/B.E. cross-architecture unwinder support. */
+
+struct ppu2spu_cache
+{
+ struct frame_id frame_id;
+ struct regcache *regcache;
+};
+
+static struct gdbarch *
+ppu2spu_prev_arch (struct frame_info *this_frame, void **this_cache)
+{
+ struct ppu2spu_cache *cache = *this_cache;
+ return get_regcache_arch (cache->regcache);
+}
+
+static void
+ppu2spu_this_id (struct frame_info *this_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct ppu2spu_cache *cache = *this_cache;
+ *this_id = cache->frame_id;
+}
+
+static struct value *
+ppu2spu_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct ppu2spu_cache *cache = *this_cache;
+ struct gdbarch *gdbarch = get_regcache_arch (cache->regcache);
+ gdb_byte *buf;
+
+ buf = alloca (register_size (gdbarch, regnum));
+ regcache_cooked_read (cache->regcache, regnum, buf);
+ return frame_unwind_got_bytes (this_frame, regnum, buf);
+}
+
+struct ppu2spu_data
+{
+ struct gdbarch *gdbarch;
+ int id;
+ unsigned int npc;
+ gdb_byte gprs[128*16];
+};
+
+static int
+ppu2spu_unwind_register (void *src, int regnum, gdb_byte *buf)
+{
+ struct ppu2spu_data *data = src;
+ enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
+
+ if (regnum >= 0 && regnum < SPU_NUM_GPRS)
+ memcpy (buf, data->gprs + 16*regnum, 16);
+ else if (regnum == SPU_ID_REGNUM)
+ store_unsigned_integer (buf, 4, byte_order, data->id);
+ else if (regnum == SPU_PC_REGNUM)
+ store_unsigned_integer (buf, 4, byte_order, data->npc);
+ else
+ return 0;
+
+ return 1;
+}
+
+static int
+ppu2spu_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame, void **this_prologue_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct ppu2spu_data data;
+ struct frame_info *fi;
+ CORE_ADDR base, func, backchain, spe_context;
+ gdb_byte buf[8];
+ int n = 0;
+
+ /* Count the number of SPU contexts already in the frame chain. */
+ for (fi = get_next_frame (this_frame); fi; fi = get_next_frame (fi))
+ if (get_frame_type (fi) == ARCH_FRAME
+ && gdbarch_bfd_arch_info (get_frame_arch (fi))->arch == bfd_arch_spu)
+ n++;
+
+ base = get_frame_sp (this_frame);
+ func = get_frame_pc (this_frame);
+ if (target_read_memory (base, buf, tdep->wordsize))
+ return 0;
+ backchain = extract_unsigned_integer (buf, tdep->wordsize, byte_order);
+
+ spe_context = ppc_linux_spe_context (tdep->wordsize, byte_order,
+ n, &data.id, &data.npc);
+ if (spe_context && base <= spe_context && spe_context < backchain)
+ {
+ char annex[32];
+
+ /* Find gdbarch for SPU. */
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ info.bfd_arch_info = bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu);
+ info.byte_order = BFD_ENDIAN_BIG;
+ info.osabi = GDB_OSABI_LINUX;
+ info.tdep_info = (void *) &data.id;
+ data.gdbarch = gdbarch_find_by_info (info);
+ if (!data.gdbarch)
+ return 0;
+
+ xsnprintf (annex, sizeof annex, "%d/regs", data.id);
+ if (target_read (¤t_target, TARGET_OBJECT_SPU, annex,
+ data.gprs, 0, sizeof data.gprs)
+ == sizeof data.gprs)
+ {
+ struct ppu2spu_cache *cache
+ = FRAME_OBSTACK_CALLOC (1, struct ppu2spu_cache);
+
+ struct address_space *aspace = get_frame_address_space (this_frame);
+ struct regcache *regcache = regcache_xmalloc (data.gdbarch, aspace);
+ struct cleanup *cleanups = make_cleanup_regcache_xfree (regcache);
+ regcache_save (regcache, ppu2spu_unwind_register, &data);
+ discard_cleanups (cleanups);
+
+ cache->frame_id = frame_id_build (base, func);
+ cache->regcache = regcache;
+ *this_prologue_cache = cache;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void
+ppu2spu_dealloc_cache (struct frame_info *self, void *this_cache)
+{
+ struct ppu2spu_cache *cache = this_cache;
+ regcache_xfree (cache->regcache);
+}
+
+static const struct frame_unwind ppu2spu_unwind = {
+ ARCH_FRAME,
+ ppu2spu_this_id,
+ ppu2spu_prev_register,
+ NULL,
+ ppu2spu_sniffer,
+ ppu2spu_dealloc_cache,
+ ppu2spu_prev_arch,
+};
+
+
static void
ppc_linux_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
+ linux_init_abi (info, gdbarch);
+
/* PPC GNU/Linux uses either 64-bit or 128-bit long doubles; where
128-bit, they are IBM long double, not IEEE quad long double as
in the System V ABI PowerPC Processor Supplement. We can safely
/* Handle inferior calls during interrupted system calls. */
set_gdbarch_write_pc (gdbarch, ppc_linux_write_pc);
+ /* Get the syscall number from the arch's register. */
+ set_gdbarch_get_syscall_number (gdbarch, ppc_linux_get_syscall_number);
+
if (tdep->wordsize == 4)
{
/* Until November 2001, gcc did not comply with the 32 bit SysV
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ /* Setting the correct XML syscall filename. */
+ set_xml_syscall_file_name (XML_SYSCALL_FILENAME_PPC);
+
/* Trampolines. */
tramp_frame_prepend_unwinder (gdbarch, &ppc32_linux_sigaction_tramp_frame);
tramp_frame_prepend_unwinder (gdbarch, &ppc32_linux_sighandler_tramp_frame);
set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpcle");
else
set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc");
+
+ /* Supported register sections. */
+ if (tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.power.vsx"))
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc_linux_vsx_regset_sections);
+ else if (tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.power.altivec"))
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc_linux_vmx_regset_sections);
+ else
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc_linux_fp_regset_sections);
}
if (tdep->wordsize == 8)
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
+ /* Setting the correct XML syscall filename. */
+ set_xml_syscall_file_name (XML_SYSCALL_FILENAME_PPC64);
+
/* Trampolines. */
tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sigaction_tramp_frame);
tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sighandler_tramp_frame);
set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpcle");
else
set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc");
+
+ /* Supported register sections. */
+ if (tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.power.vsx"))
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc64_linux_vsx_regset_sections);
+ else if (tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.power.altivec"))
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc64_linux_vmx_regset_sections);
+ else
+ set_gdbarch_core_regset_sections (gdbarch,
+ ppc64_linux_fp_regset_sections);
}
set_gdbarch_regset_from_core_section (gdbarch, ppc_linux_regset_from_core_section);
set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description);
- /* Supported register sections. */
- if (tdesc_find_feature (info.target_desc,
- "org.gnu.gdb.power.vsx"))
- set_gdbarch_core_regset_sections (gdbarch, ppc_linux_vsx_regset_sections);
- else if (tdesc_find_feature (info.target_desc,
- "org.gnu.gdb.power.altivec"))
- set_gdbarch_core_regset_sections (gdbarch, ppc_linux_vmx_regset_sections);
- else
- set_gdbarch_core_regset_sections (gdbarch, ppc_linux_fp_regset_sections);
-
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
/* Cell/B.E. multi-architecture support. */
set_spu_solib_ops (gdbarch);
+ /* Cell/B.E. cross-architecture unwinder support. */
+ frame_unwind_prepend_unwinder (gdbarch, &ppu2spu_unwind);
+
/* The default displaced_step_at_entry_point doesn't work for
SPU stand-alone executables. */
set_gdbarch_displaced_step_location (gdbarch,
/* Attach to inferior_created observer. */
observer_attach_inferior_created (ppc_linux_inferior_created);
+ /* Attach to observers to track __spe_current_active_context. */
+ observer_attach_inferior_created (ppc_linux_spe_context_inferior_created);
+ observer_attach_solib_loaded (ppc_linux_spe_context_solib_loaded);
+ observer_attach_solib_unloaded (ppc_linux_spe_context_solib_unloaded);
+
/* Initialize the Linux target descriptions. */
initialize_tdesc_powerpc_32l ();
initialize_tdesc_powerpc_altivec32l ();
projects / deliverable / binutils-gdb.git / blobdiff