/* Target-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
- Free Software Foundation, Inc.
+
+ Copyright (C) 1986-2014 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "gdbcmd.h"
#include "symfile.h"
#include "objfiles.h"
+#include "regcache.h"
+#include "value.h"
+#include "osabi.h"
+#include "regset.h"
+#include "solib-svr4.h"
+#include "solib-spu.h"
+#include "solib.h"
+#include "solist.h"
+#include "ppc-tdep.h"
+#include "ppc64-tdep.h"
+#include "ppc-linux-tdep.h"
+#include "glibc-tdep.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
+#include "tramp-frame.h"
+#include "observer.h"
+#include "auxv.h"
+#include "elf/common.h"
+#include "elf/ppc64.h"
+#include "exceptions.h"
+#include "arch-utils.h"
+#include "spu-tdep.h"
+#include "xml-syscall.h"
+#include "linux-tdep.h"
+
+#include "stap-probe.h"
+#include "ax.h"
+#include "ax-gdb.h"
+#include "cli/cli-utils.h"
+#include "parser-defs.h"
+#include "user-regs.h"
+#include <ctype.h>
+#include "elf-bfd.h" /* for elfcore_write_* */
+
+#include "features/rs6000/powerpc-32l.c"
+#include "features/rs6000/powerpc-altivec32l.c"
+#include "features/rs6000/powerpc-cell32l.c"
+#include "features/rs6000/powerpc-vsx32l.c"
+#include "features/rs6000/powerpc-isa205-32l.c"
+#include "features/rs6000/powerpc-isa205-altivec32l.c"
+#include "features/rs6000/powerpc-isa205-vsx32l.c"
+#include "features/rs6000/powerpc-64l.c"
+#include "features/rs6000/powerpc-altivec64l.c"
+#include "features/rs6000/powerpc-cell64l.c"
+#include "features/rs6000/powerpc-vsx64l.c"
+#include "features/rs6000/powerpc-isa205-64l.c"
+#include "features/rs6000/powerpc-isa205-altivec64l.c"
+#include "features/rs6000/powerpc-isa205-vsx64l.c"
+#include "features/rs6000/powerpc-e500l.c"
+
+/* Shared library operations for PowerPC-Linux. */
+static struct target_so_ops powerpc_so_ops;
+
+/* 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,
+ but is careful not to write back the previous contents if the code
+ in question has changed in between inserting the breakpoint and
+ removing it.
+
+ Here is the problem that we're trying to solve...
+
+ Once upon a time, before introducing this function to remove
+ breakpoints from the inferior, setting a breakpoint on a shared
+ library function prior to running the program would not work
+ properly. In order to understand the problem, it is first
+ necessary to understand a little bit about dynamic linking on
+ this platform.
+
+ A call to a shared library function is accomplished via a bl
+ (branch-and-link) instruction whose branch target is an entry
+ in the procedure linkage table (PLT). The PLT in the object
+ file is uninitialized. To gdb, prior to running the program, the
+ entries in the PLT are all zeros.
+
+ Once the program starts running, the shared libraries are loaded
+ and the procedure linkage table is initialized, but the entries in
+ the table are not (necessarily) resolved. Once a function is
+ actually called, the code in the PLT is hit and the function is
+ resolved. In order to better illustrate this, an example is in
+ order; the following example is from the gdb testsuite.
+
+ We start the program shmain.
+
+ [kev@arroyo testsuite]$ ../gdb gdb.base/shmain
+ [...]
+
+ We place two breakpoints, one on shr1 and the other on main.
+
+ (gdb) b shr1
+ Breakpoint 1 at 0x100409d4
+ (gdb) b main
+ Breakpoint 2 at 0x100006a0: file gdb.base/shmain.c, line 44.
+
+ Examine the instruction (and the immediatly following instruction)
+ upon which the breakpoint was placed. Note that the PLT entry
+ for shr1 contains zeros.
+
+ (gdb) x/2i 0x100409d4
+ 0x100409d4 <shr1>: .long 0x0
+ 0x100409d8 <shr1+4>: .long 0x0
+
+ Now run 'til main.
+
+ (gdb) r
+ Starting program: gdb.base/shmain
+ Breakpoint 1 at 0xffaf790: file gdb.base/shr1.c, line 19.
+
+ Breakpoint 2, main ()
+ at gdb.base/shmain.c:44
+ 44 g = 1;
+
+ Examine the PLT again. Note that the loading of the shared
+ library has initialized the PLT to code which loads a constant
+ (which I think is an index into the GOT) into r11 and then
+ branchs a short distance to the code which actually does the
+ resolving.
+
+ (gdb) x/2i 0x100409d4
+ 0x100409d4 <shr1>: li r11,4
+ 0x100409d8 <shr1+4>: b 0x10040984 <sg+4>
+ (gdb) c
+ Continuing.
+
+ Breakpoint 1, shr1 (x=1)
+ at gdb.base/shr1.c:19
+ 19 l = 1;
+
+ Now we've hit the breakpoint at shr1. (The breakpoint was
+ reset from the PLT entry to the actual shr1 function after the
+ shared library was loaded.) Note that the PLT entry has been
+ resolved to contain a branch that takes us directly to shr1.
+ (The real one, not the PLT entry.)
+
+ (gdb) x/2i 0x100409d4
+ 0x100409d4 <shr1>: b 0xffaf76c <shr1>
+ 0x100409d8 <shr1+4>: b 0x10040984 <sg+4>
+
+ The thing to note here is that the PLT entry for shr1 has been
+ changed twice.
+
+ Now the problem should be obvious. GDB places a breakpoint (a
+ trap instruction) on the zero value of the PLT entry for shr1.
+ Later on, after the shared library had been loaded and the PLT
+ initialized, GDB gets a signal indicating this fact and attempts
+ (as it always does when it stops) to remove all the breakpoints.
+
+ The breakpoint removal was causing the former contents (a zero
+ word) to be written back to the now initialized PLT entry thus
+ destroying a portion of the initialization that had occurred only a
+ short time ago. When execution continued, the zero word would be
+ executed as an instruction an illegal instruction trap was
+ generated instead. (0 is not a legal instruction.)
+
+ The fix for this problem was fairly straightforward. The function
+ memory_remove_breakpoint from mem-break.c was copied to this file,
+ modified slightly, and renamed to ppc_linux_memory_remove_breakpoint.
+ In tm-linux.h, MEMORY_REMOVE_BREAKPOINT is defined to call this new
+ function.
+
+ The differences between ppc_linux_memory_remove_breakpoint () and
+ memory_remove_breakpoint () are minor. All that the former does
+ that the latter does not is check to make sure that the breakpoint
+ location actually contains a breakpoint (trap instruction) prior
+ to attempting to write back the old contents. If it does contain
+ a trap instruction, we allow the old contents to be written back.
+ Otherwise, we silently do nothing.
+
+ The big question is whether memory_remove_breakpoint () should be
+ changed to have the same functionality. The downside is that more
+ traffic is generated for remote targets since we'll have an extra
+ fetch of a memory word each time a breakpoint is removed.
+
+ For the time being, we'll leave this self-modifying-code-friendly
+ version in ppc-linux-tdep.c, but it ought to be migrated somewhere
+ else in the event that some other platform has similar needs with
+ regard to removing breakpoints in some potentially self modifying
+ code. */
+static int
+ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
+{
+ CORE_ADDR addr = bp_tgt->placed_address;
+ const unsigned char *bp;
+ int val;
+ int bplen;
+ gdb_byte old_contents[BREAKPOINT_MAX];
+ struct cleanup *cleanup;
+
+ /* Determine appropriate breakpoint contents and size for this address. */
+ bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
+ if (bp == NULL)
+ error (_("Software breakpoints not implemented for this target."));
+
+ /* Make sure we see the memory breakpoints. */
+ cleanup = make_show_memory_breakpoints_cleanup (1);
+ val = target_read_memory (addr, old_contents, bplen);
+
+ /* If our breakpoint is no longer at the address, this means that the
+ program modified the code on us, so it is wrong to put back the
+ old value. */
+ if (val == 0 && memcmp (bp, old_contents, bplen) == 0)
+ val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen);
+
+ do_cleanups (cleanup);
+ return val;
+}
-/* The following two instructions are used in the signal trampoline
- code on linux/ppc */
-#define INSTR_LI_R0_0x7777 0x38007777
-#define INSTR_SC 0x44000002
-
-/* Since the *-tdep.c files are platform independent (i.e, they may be
- used to build cross platform debuggers), we can't include system
- headers. Therefore, details concerning the sigcontext structure
- must be painstakingly rerecorded. What's worse, if these details
- ever change in the header files, they'll have to be changed here
- as well. */
-
-/* __SIGNAL_FRAMESIZE from <asm/ptrace.h> */
-#define PPC_LINUX_SIGNAL_FRAMESIZE 64
-
-/* From <asm/sigcontext.h>, offsetof(struct sigcontext_struct, regs) == 0x1c */
-#define PPC_LINUX_REGS_PTR_OFFSET (PPC_LINUX_SIGNAL_FRAMESIZE + 0x1c)
-
-/* From <asm/sigcontext.h>,
- offsetof(struct sigcontext_struct, handler) == 0x14 */
-#define PPC_LINUX_HANDLER_PTR_OFFSET (PPC_LINUX_SIGNAL_FRAMESIZE + 0x14)
-
-/* From <asm/ptrace.h>, values for PT_NIP, PT_R1, and PT_LNK */
-#define PPC_LINUX_PT_R0 0
-#define PPC_LINUX_PT_R1 1
-#define PPC_LINUX_PT_R2 2
-#define PPC_LINUX_PT_R3 3
-#define PPC_LINUX_PT_R4 4
-#define PPC_LINUX_PT_R5 5
-#define PPC_LINUX_PT_R6 6
-#define PPC_LINUX_PT_R7 7
-#define PPC_LINUX_PT_R8 8
-#define PPC_LINUX_PT_R9 9
-#define PPC_LINUX_PT_R10 10
-#define PPC_LINUX_PT_R11 11
-#define PPC_LINUX_PT_R12 12
-#define PPC_LINUX_PT_R13 13
-#define PPC_LINUX_PT_R14 14
-#define PPC_LINUX_PT_R15 15
-#define PPC_LINUX_PT_R16 16
-#define PPC_LINUX_PT_R17 17
-#define PPC_LINUX_PT_R18 18
-#define PPC_LINUX_PT_R19 19
-#define PPC_LINUX_PT_R20 20
-#define PPC_LINUX_PT_R21 21
-#define PPC_LINUX_PT_R22 22
-#define PPC_LINUX_PT_R23 23
-#define PPC_LINUX_PT_R24 24
-#define PPC_LINUX_PT_R25 25
-#define PPC_LINUX_PT_R26 26
-#define PPC_LINUX_PT_R27 27
-#define PPC_LINUX_PT_R28 28
-#define PPC_LINUX_PT_R29 29
-#define PPC_LINUX_PT_R30 30
-#define PPC_LINUX_PT_R31 31
-#define PPC_LINUX_PT_NIP 32
-#define PPC_LINUX_PT_MSR 33
-#define PPC_LINUX_PT_CTR 35
-#define PPC_LINUX_PT_LNK 36
-#define PPC_LINUX_PT_XER 37
-#define PPC_LINUX_PT_CCR 38
-#define PPC_LINUX_PT_MQ 39
-#define PPC_LINUX_PT_FPR0 48 /* each FP reg occupies 2 slots in this space */
-#define PPC_LINUX_PT_FPR31 (PPC_LINUX_PT_FPR0 + 2*31)
-#define PPC_LINUX_PT_FPSCR (PPC_LINUX_PT_FPR0 + 2*32 + 1)
-
-/* Determine if pc is in a signal trampoline...
-
- Ha! That's not what this does at all. wait_for_inferior in infrun.c
- calls IN_SIGTRAMP in order to detect entry into a signal trampoline
- just after delivery of a signal. But on linux, signal trampolines
- are used for the return path only. The kernel sets things up so that
- the signal handler is called directly.
-
- If we use in_sigtramp2() in place of in_sigtramp() (see below)
- we'll (often) end up with stop_pc in the trampoline and prev_pc in
- the (now exited) handler. The code there will cause a temporary
- breakpoint to be set on prev_pc which is not very likely to get hit
- again.
-
- If this is confusing, think of it this way... the code in
- wait_for_inferior() needs to be able to detect entry into a signal
- trampoline just after a signal is delivered, not after the handler
- has been run.
-
- So, we define in_sigtramp() below to return 1 if the following is
- true:
-
- 1) The previous frame is a real signal trampoline.
-
- - and -
-
- 2) pc is at the first or second instruction of the corresponding
- handler.
-
- Why the second instruction? It seems that wait_for_inferior()
- never sees the first instruction when single stepping. When a
- signal is delivered while stepping, the next instruction that
- would've been stepped over isn't, instead a signal is delivered and
- the first instruction of the handler is stepped over instead. That
- puts us on the second instruction. (I added the test for the
- first instruction long after the fact, just in case the observed
- behavior is ever fixed.)
-
- IN_SIGTRAMP is called from blockframe.c as well in order to set
- the signal_handler_caller flag. Because of our strange definition
- of in_sigtramp below, we can't rely on signal_handler_caller getting
- set correctly from within blockframe.c. This is why we take pains
- to set it in init_extra_frame_info(). */
+/* For historic reasons, PPC 32 GNU/Linux follows PowerOpen rather
+ than the 32 bit SYSV R4 ABI structure return convention - all
+ structures, no matter their size, are put in memory. Vectors,
+ which were added later, do get returned in a register though. */
+
+static enum return_value_convention
+ppc_linux_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *valtype, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
+{
+ if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
+ || TYPE_CODE (valtype) == TYPE_CODE_UNION)
+ && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8)
+ && TYPE_VECTOR (valtype)))
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ else
+ return ppc_sysv_abi_return_value (gdbarch, function, valtype, regcache,
+ readbuf, writebuf);
+}
-int
-ppc_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
+static struct core_regset_section ppc_linux_vsx_regset_sections[] =
{
- CORE_ADDR lr;
- CORE_ADDR sp;
- CORE_ADDR tramp_sp;
- char buf[4];
- CORE_ADDR handler;
+ { ".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", 48 * 4, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { ".reg-ppc-vmx", 544, "ppc Altivec" },
+ { NULL, 0}
+};
- lr = read_register (LR_REGNUM);
- if (!ppc_linux_at_sigtramp_return_path (lr))
- return 0;
+static struct core_regset_section ppc_linux_fp_regset_sections[] =
+{
+ { ".reg", 48 * 4, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { NULL, 0}
+};
- sp = read_register (SP_REGNUM);
+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}
+};
- if (target_read_memory (sp, buf, sizeof (buf)) != 0)
- return 0;
+static struct core_regset_section ppc64_linux_fp_regset_sections[] =
+{
+ { ".reg", 48 * 8, "general-purpose" },
+ { ".reg2", 264, "floating-point" },
+ { NULL, 0}
+};
+
+/* PLT stub in executable. */
+static struct ppc_insn_pattern powerpc32_plt_stub[] =
+ {
+ { 0xffff0000, 0x3d600000, 0 }, /* lis r11, xxxx */
+ { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0, 0, 0 }
+ };
+
+/* PLT stub in shared library. */
+static struct ppc_insn_pattern powerpc32_plt_stub_so[] =
+ {
+ { 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0xffffffff, 0x60000000, 0 }, /* nop */
+ { 0, 0, 0 }
+ };
+#define POWERPC32_PLT_STUB_LEN ARRAY_SIZE (powerpc32_plt_stub)
+
+/* Check if PC is in PLT stub. For non-secure PLT, stub is in .plt
+ section. For secure PLT, stub is in .text and we need to check
+ instruction patterns. */
+
+static int
+powerpc_linux_in_dynsym_resolve_code (CORE_ADDR pc)
+{
+ struct bound_minimal_symbol sym;
+
+ /* Check whether PC is in the dynamic linker. This also checks
+ whether it is in the .plt section, used by non-PIC executables. */
+ if (svr4_in_dynsym_resolve_code (pc))
+ return 1;
+
+ /* Check if we are in the resolver. */
+ sym = lookup_minimal_symbol_by_pc (pc);
+ if (sym.minsym != NULL
+ && (strcmp (SYMBOL_LINKAGE_NAME (sym.minsym), "__glink") == 0
+ || strcmp (SYMBOL_LINKAGE_NAME (sym.minsym),
+ "__glink_PLTresolve") == 0))
+ return 1;
+
+ return 0;
+}
- tramp_sp = extract_unsigned_integer (buf, 4);
+/* Follow PLT stub to actual routine. */
- if (target_read_memory (tramp_sp + PPC_LINUX_HANDLER_PTR_OFFSET, buf,
- sizeof (buf)) != 0)
- return 0;
+static CORE_ADDR
+ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ unsigned int insnbuf[POWERPC32_PLT_STUB_LEN];
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR target = 0;
+
+ if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf))
+ {
+ /* Insn pattern is
+ lis r11, xxxx
+ lwz r11, xxxx(r11)
+ Branch target is in r11. */
+
+ target = (ppc_insn_d_field (insnbuf[0]) << 16)
+ | ppc_insn_d_field (insnbuf[1]);
+ target = read_memory_unsigned_integer (target, 4, byte_order);
+ }
+
+ if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so, insnbuf))
+ {
+ /* Insn pattern is
+ lwz r11, xxxx(r30)
+ Branch target is in r11. */
+
+ target = get_frame_register_unsigned (frame, tdep->ppc_gp0_regnum + 30)
+ + ppc_insn_d_field (insnbuf[0]);
+ target = read_memory_unsigned_integer (target, 4, byte_order);
+ }
+
+ return target;
+}
+
+/* Wrappers to handle Linux-only registers. */
+
+static void
+ppc_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const struct ppc_reg_offsets *offsets = regset->descr;
- handler = extract_unsigned_integer (buf, 4);
+ ppc_supply_gregset (regset, regcache, regnum, gregs, len);
- return (pc == handler || pc == handler + 4);
+ if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
+ {
+ /* "orig_r3" is stored 2 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
+ ppc_supply_reg (regcache, PPC_ORIG_R3_REGNUM, gregs,
+ offsets->pc_offset + 2 * offsets->gpr_size,
+ offsets->gpr_size);
+
+ /* "trap" is stored 8 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_TRAP_REGNUM)
+ ppc_supply_reg (regcache, PPC_TRAP_REGNUM, gregs,
+ offsets->pc_offset + 8 * offsets->gpr_size,
+ offsets->gpr_size);
+ }
}
-/*
- * The signal handler trampoline is on the stack and consists of exactly
- * two instructions. The easiest and most accurate way of determining
- * whether the pc is in one of these trampolines is by inspecting the
- * instructions. It'd be faster though if we could find a way to do this
- * via some simple address comparisons.
- */
+static void
+ppc_linux_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ const struct ppc_reg_offsets *offsets = regset->descr;
+
+ /* Clear areas in the linux gregset not written elsewhere. */
+ if (regnum == -1)
+ memset (gregs, 0, len);
+
+ ppc_collect_gregset (regset, regcache, regnum, gregs, len);
+
+ if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
+ {
+ /* "orig_r3" is stored 2 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
+ ppc_collect_reg (regcache, PPC_ORIG_R3_REGNUM, gregs,
+ offsets->pc_offset + 2 * offsets->gpr_size,
+ offsets->gpr_size);
+
+ /* "trap" is stored 8 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_TRAP_REGNUM)
+ ppc_collect_reg (regcache, PPC_TRAP_REGNUM, gregs,
+ offsets->pc_offset + 8 * offsets->gpr_size,
+ offsets->gpr_size);
+ }
+}
+
+/* Regset descriptions. */
+static const struct ppc_reg_offsets ppc32_linux_reg_offsets =
+ {
+ /* General-purpose registers. */
+ /* .r0_offset = */ 0,
+ /* .gpr_size = */ 4,
+ /* .xr_size = */ 4,
+ /* .pc_offset = */ 128,
+ /* .ps_offset = */ 132,
+ /* .cr_offset = */ 152,
+ /* .lr_offset = */ 144,
+ /* .ctr_offset = */ 140,
+ /* .xer_offset = */ 148,
+ /* .mq_offset = */ 156,
+
+ /* Floating-point registers. */
+ /* .f0_offset = */ 0,
+ /* .fpscr_offset = */ 256,
+ /* .fpscr_size = */ 8,
+
+ /* AltiVec registers. */
+ /* .vr0_offset = */ 0,
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 528
+ };
+
+static const struct ppc_reg_offsets ppc64_linux_reg_offsets =
+ {
+ /* General-purpose registers. */
+ /* .r0_offset = */ 0,
+ /* .gpr_size = */ 8,
+ /* .xr_size = */ 8,
+ /* .pc_offset = */ 256,
+ /* .ps_offset = */ 264,
+ /* .cr_offset = */ 304,
+ /* .lr_offset = */ 288,
+ /* .ctr_offset = */ 280,
+ /* .xer_offset = */ 296,
+ /* .mq_offset = */ 312,
+
+ /* Floating-point registers. */
+ /* .f0_offset = */ 0,
+ /* .fpscr_offset = */ 256,
+ /* .fpscr_size = */ 8,
+
+ /* AltiVec registers. */
+ /* .vr0_offset = */ 0,
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 528
+ };
+
+static const struct regset ppc32_linux_gregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_linux_supply_gregset,
+ ppc_linux_collect_gregset,
+ NULL
+};
+
+static const struct regset ppc64_linux_gregset = {
+ &ppc64_linux_reg_offsets,
+ ppc_linux_supply_gregset,
+ ppc_linux_collect_gregset,
+ NULL
+};
+
+static const struct regset ppc32_linux_fpregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_fpregset,
+ ppc_collect_fpregset,
+ NULL
+};
+
+static const struct regset ppc32_linux_vrregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_vrregset,
+ ppc_collect_vrregset,
+ NULL
+};
+
+static const struct regset ppc32_linux_vsxregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_vsxregset,
+ ppc_collect_vsxregset,
+ NULL
+};
+
+const struct regset *
+ppc_linux_gregset (int wordsize)
+{
+ return wordsize == 8 ? &ppc64_linux_gregset : &ppc32_linux_gregset;
+}
+
+const struct regset *
+ppc_linux_fpregset (void)
+{
+ return &ppc32_linux_fpregset;
+}
+
+static const struct regset *
+ppc_linux_regset_from_core_section (struct gdbarch *core_arch,
+ const char *sect_name, size_t sect_size)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
+ if (strcmp (sect_name, ".reg") == 0)
+ {
+ if (tdep->wordsize == 4)
+ return &ppc32_linux_gregset;
+ else
+ return &ppc64_linux_gregset;
+ }
+ if (strcmp (sect_name, ".reg2") == 0)
+ return &ppc32_linux_fpregset;
+ if (strcmp (sect_name, ".reg-ppc-vmx") == 0)
+ return &ppc32_linux_vrregset;
+ if (strcmp (sect_name, ".reg-ppc-vsx") == 0)
+ return &ppc32_linux_vsxregset;
+ return NULL;
+}
+
+static void
+ppc_linux_sigtramp_cache (struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func, LONGEST offset,
+ int bias)
+{
+ CORE_ADDR base;
+ CORE_ADDR regs;
+ CORE_ADDR gpregs;
+ CORE_ADDR fpregs;
+ int i;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ base = get_frame_register_unsigned (this_frame,
+ gdbarch_sp_regnum (gdbarch));
+ if (bias > 0 && get_frame_pc (this_frame) != func)
+ /* See below, some signal trampolines increment the stack as their
+ first instruction, need to compensate for that. */
+ base -= bias;
+
+ /* Find the address of the register buffer pointer. */
+ regs = base + offset;
+ /* Use that to find the address of the corresponding register
+ buffers. */
+ gpregs = read_memory_unsigned_integer (regs, tdep->wordsize, byte_order);
+ fpregs = gpregs + 48 * tdep->wordsize;
+
+ /* General purpose. */
+ for (i = 0; i < 32; i++)
+ {
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (this_cache,
+ regnum, gpregs + i * tdep->wordsize);
+ }
+ trad_frame_set_reg_addr (this_cache,
+ gdbarch_pc_regnum (gdbarch),
+ gpregs + 32 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum,
+ gpregs + 35 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum,
+ gpregs + 36 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum,
+ gpregs + 37 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum,
+ gpregs + 38 * tdep->wordsize);
+
+ if (ppc_linux_trap_reg_p (gdbarch))
+ {
+ trad_frame_set_reg_addr (this_cache, PPC_ORIG_R3_REGNUM,
+ gpregs + 34 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, PPC_TRAP_REGNUM,
+ gpregs + 40 * tdep->wordsize);
+ }
+
+ if (ppc_floating_point_unit_p (gdbarch))
+ {
+ /* Floating point registers. */
+ for (i = 0; i < 32; i++)
+ {
+ int regnum = i + gdbarch_fp0_regnum (gdbarch);
+ trad_frame_set_reg_addr (this_cache, regnum,
+ fpregs + i * tdep->wordsize);
+ }
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_fpscr_regnum,
+ fpregs + 32 * tdep->wordsize);
+ }
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static void
+ppc32_linux_sigaction_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0xd0 /* Offset to ucontext_t. */
+ + 0x30 /* Offset to .reg. */,
+ 0);
+}
+
+static void
+ppc64_linux_sigaction_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0x80 /* Offset to ucontext_t. */
+ + 0xe0 /* Offset to .reg. */,
+ 128);
+}
+
+static void
+ppc32_linux_sighandler_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0x40 /* Offset to ucontext_t. */
+ + 0x1c /* Offset to .reg. */,
+ 0);
+}
+
+static void
+ppc64_linux_sighandler_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0x80 /* Offset to struct sigcontext. */
+ + 0x38 /* Offset to .reg. */,
+ 128);
+}
+
+static struct tramp_frame ppc32_linux_sigaction_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x380000ac, -1 }, /* li r0, 172 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sigaction_cache_init
+};
+static struct tramp_frame ppc64_linux_sigaction_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, -1 }, /* addi r1,r1,128 */
+ { 0x380000ac, -1 }, /* li r0, 172 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sigaction_cache_init
+};
+static struct tramp_frame ppc32_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38000077, -1 }, /* li r0,119 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sighandler_cache_init
+};
+static struct tramp_frame ppc64_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, -1 }, /* addi r1,r1,128 */
+ { 0x38000077, -1 }, /* li r0,119 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sighandler_cache_init
+};
+
+
+/* Address to use for displaced stepping. When debugging a stand-alone
+ SPU executable, entry_point_address () will point to an SPU local-store
+ address and is thus not usable as displaced stepping location. We use
+ the auxiliary vector to determine the PowerPC-side entry point address
+ instead. */
+
+static CORE_ADDR ppc_linux_entry_point_addr = 0;
+
+static void
+ppc_linux_inferior_created (struct target_ops *target, int from_tty)
+{
+ ppc_linux_entry_point_addr = 0;
+}
+
+static CORE_ADDR
+ppc_linux_displaced_step_location (struct gdbarch *gdbarch)
+{
+ if (ppc_linux_entry_point_addr == 0)
+ {
+ CORE_ADDR addr;
+
+ /* Determine entry point from target auxiliary vector. */
+ if (target_auxv_search (¤t_target, AT_ENTRY, &addr) <= 0)
+ error (_("Cannot find AT_ENTRY auxiliary vector entry."));
+
+ /* Make certain that the address points at real code, and not a
+ function descriptor. */
+ addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr,
+ ¤t_target);
+
+ /* Inferior calls also use the entry point as a breakpoint location.
+ We don't want displaced stepping to interfere with those
+ breakpoints, so leave space. */
+ ppc_linux_entry_point_addr = addr + 2 * PPC_INSN_SIZE;
+ }
+
+ return ppc_linux_entry_point_addr;
+}
+
+
+/* Return 1 if PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM are usable. */
int
-ppc_linux_at_sigtramp_return_path (CORE_ADDR pc)
+ppc_linux_trap_reg_p (struct gdbarch *gdbarch)
{
- char buf[12];
- unsigned long pcinsn;
- if (target_read_memory (pc - 4, buf, sizeof (buf)) != 0)
+ /* If we do not have a target description with registers, then
+ the special registers will not be included in the register set. */
+ if (!tdesc_has_registers (gdbarch_target_desc (gdbarch)))
return 0;
- /* extract the instruction at the pc */
- pcinsn = extract_unsigned_integer (buf + 4, 4);
+ /* If we do, then it is safe to check the size. */
+ return register_size (gdbarch, PPC_ORIG_R3_REGNUM) > 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));
- return (
- (pcinsn == INSTR_LI_R0_0x7777
- && extract_unsigned_integer (buf + 8, 4) == INSTR_SC)
- ||
- (pcinsn == INSTR_SC
- && extract_unsigned_integer (buf, 4) == INSTR_LI_R0_0x7777));
+ 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;
}
-CORE_ADDR
-ppc_linux_skip_trampoline_code (CORE_ADDR pc)
+static void
+ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- char buf[4];
- struct obj_section *sect;
- struct objfile *objfile;
- unsigned long insn;
- CORE_ADDR plt_start = 0;
- CORE_ADDR symtab = 0;
- CORE_ADDR strtab = 0;
- int num_slots = -1;
- int reloc_index = -1;
- CORE_ADDR plt_table;
- CORE_ADDR reloc;
- CORE_ADDR sym;
- long symidx;
- char symname[1024];
- struct minimal_symbol *msymbol;
-
- /* Find the section pc is in; return if not in .plt */
- sect = find_pc_section (pc);
- if (!sect || strcmp (sect->the_bfd_section->name, ".plt") != 0)
- return 0;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- objfile = sect->objfile;
+ regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), pc);
- /* Pick up the instruction at pc. It had better be of the
- form
- li r11, IDX
+ /* Set special TRAP register to -1 to prevent the kernel from
+ messing with the PC we just installed, if we happen to be
+ within an interrupted system call that the kernel wants to
+ restart.
- where IDX is an index into the plt_table. */
+ Note that after we return from the dummy call, the TRAP and
+ ORIG_R3 registers will be automatically restored, and the
+ kernel continues to restart the system call at this point. */
+ if (ppc_linux_trap_reg_p (gdbarch))
+ regcache_cooked_write_unsigned (regcache, PPC_TRAP_REGNUM, -1);
+}
- if (target_read_memory (pc, buf, 4) != 0)
- return 0;
- insn = extract_unsigned_integer (buf, 4);
+static int
+ppc_linux_spu_section (bfd *abfd, asection *asect, void *user_data)
+{
+ return strncmp (bfd_section_name (abfd, asect), "SPU/", 4) == 0;
+}
- if ((insn & 0xffff0000) != 0x39600000 /* li r11, VAL */ )
- return 0;
+static const struct target_desc *
+ppc_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
+{
+ asection *cell = bfd_sections_find_if (abfd, ppc_linux_spu_section, NULL);
+ asection *altivec = bfd_get_section_by_name (abfd, ".reg-ppc-vmx");
+ asection *vsx = bfd_get_section_by_name (abfd, ".reg-ppc-vsx");
+ asection *section = bfd_get_section_by_name (abfd, ".reg");
+ if (! section)
+ return NULL;
+
+ switch (bfd_section_size (abfd, section))
+ {
+ case 48 * 4:
+ if (cell)
+ return tdesc_powerpc_cell32l;
+ else if (vsx)
+ return tdesc_powerpc_vsx32l;
+ else if (altivec)
+ return tdesc_powerpc_altivec32l;
+ else
+ return tdesc_powerpc_32l;
+
+ case 48 * 8:
+ if (cell)
+ return tdesc_powerpc_cell64l;
+ else if (vsx)
+ return tdesc_powerpc_vsx64l;
+ else if (altivec)
+ return tdesc_powerpc_altivec64l;
+ else
+ return tdesc_powerpc_64l;
- reloc_index = (insn << 16) >> 16;
+ default:
+ return NULL;
+ }
+}
+
+
+/* Implementation of `gdbarch_elf_make_msymbol_special', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
- /* Find the objfile that pc is in and obtain the information
- necessary for finding the symbol name. */
- for (sect = objfile->sections; sect < objfile->sections_end; ++sect)
+static void
+ppc_elfv2_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
+{
+ elf_symbol_type *elf_sym = (elf_symbol_type *)sym;
+
+ /* If the symbol is marked as having a local entry point, set a target
+ flag in the msymbol. We currently only support local entry point
+ offsets of 8 bytes, which is the only entry point offset ever used
+ by current compilers. If/when other offsets are ever used, we will
+ have to use additional target flag bits to store them. */
+ switch (PPC64_LOCAL_ENTRY_OFFSET (elf_sym->internal_elf_sym.st_other))
{
- const char *secname = sect->the_bfd_section->name;
- if (strcmp (secname, ".plt") == 0)
- plt_start = sect->addr;
- else if (strcmp (secname, ".rela.plt") == 0)
- num_slots = ((int) sect->endaddr - (int) sect->addr) / 12;
- else if (strcmp (secname, ".dynsym") == 0)
- symtab = sect->addr;
- else if (strcmp (secname, ".dynstr") == 0)
- strtab = sect->addr;
+ default:
+ break;
+ case 8:
+ MSYMBOL_TARGET_FLAG_1 (msym) = 1;
+ break;
}
+}
- /* Make sure we have all the information we need. */
- if (plt_start == 0 || num_slots == -1 || symtab == 0 || strtab == 0)
- return 0;
+/* Implementation of `gdbarch_skip_entrypoint', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
- /* Compute the value of the plt table */
- plt_table = plt_start + 72 + 8 * num_slots;
+static CORE_ADDR
+ppc_elfv2_skip_entrypoint (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ struct bound_minimal_symbol fun;
+ int local_entry_offset = 0;
- /* Get address of the relocation entry (Elf32_Rela) */
- if (target_read_memory (plt_table + reloc_index, buf, 4) != 0)
- return 0;
- reloc = extract_address (buf, 4);
+ fun = lookup_minimal_symbol_by_pc (pc);
+ if (fun.minsym == NULL)
+ return pc;
- sect = find_pc_section (reloc);
- if (!sect)
- return 0;
+ /* See ppc_elfv2_elf_make_msymbol_special for how local entry point
+ offset values are encoded. */
+ if (MSYMBOL_TARGET_FLAG_1 (fun.minsym))
+ local_entry_offset = 8;
- if (strcmp (sect->the_bfd_section->name, ".text") == 0)
- return reloc;
+ if (SYMBOL_VALUE_ADDRESS (fun.minsym) <= pc
+ && pc < SYMBOL_VALUE_ADDRESS (fun.minsym) + local_entry_offset)
+ return SYMBOL_VALUE_ADDRESS (fun.minsym) + local_entry_offset;
- /* Now get the r_info field which is the relocation type and symbol
- index. */
- if (target_read_memory (reloc + 4, buf, 4) != 0)
- return 0;
- symidx = extract_unsigned_integer (buf, 4);
+ return pc;
+}
- /* Shift out the relocation type leaving just the symbol index */
- /* symidx = ELF32_R_SYM(symidx); */
- symidx = symidx >> 8;
+/* Implementation of `gdbarch_stap_is_single_operand', as defined in
+ gdbarch.h. */
- /* compute the address of the symbol */
- sym = symtab + symidx * 4;
+static int
+ppc_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
+{
+ return (*s == 'i' /* Literal number. */
+ || (isdigit (*s) && s[1] == '('
+ && isdigit (s[2])) /* Displacement. */
+ || (*s == '(' && isdigit (s[1])) /* Register indirection. */
+ || isdigit (*s)); /* Register value. */
+}
- /* Fetch the string table index */
- if (target_read_memory (sym, buf, 4) != 0)
- return 0;
- symidx = extract_unsigned_integer (buf, 4);
+/* Implementation of `gdbarch_stap_parse_special_token', as defined in
+ gdbarch.h. */
- /* Fetch the string; we don't know how long it is. Is it possible
- that the following will fail because we're trying to fetch too
- much? */
- if (target_read_memory (strtab + symidx, symname, sizeof (symname)) != 0)
- return 0;
+static int
+ppc_stap_parse_special_token (struct gdbarch *gdbarch,
+ struct stap_parse_info *p)
+{
+ if (isdigit (*p->arg))
+ {
+ /* This temporary pointer is needed because we have to do a lookahead.
+ We could be dealing with a register displacement, and in such case
+ we would not need to do anything. */
+ const char *s = p->arg;
+ char *regname;
+ int len;
+ struct stoken str;
+
+ while (isdigit (*s))
+ ++s;
+
+ if (*s == '(')
+ {
+ /* It is a register displacement indeed. Returning 0 means we are
+ deferring the treatment of this case to the generic parser. */
+ return 0;
+ }
- /* This might not work right if we have multiple symbols with the
- same name; the only way to really get it right is to perform
- the same sort of lookup as the dynamic linker. */
- msymbol = lookup_minimal_symbol_text (symname, NULL, NULL);
- if (!msymbol)
- return 0;
+ len = s - p->arg;
+ regname = alloca (len + 2);
+ regname[0] = 'r';
+
+ strncpy (regname + 1, p->arg, len);
+ ++len;
+ regname[len] = '\0';
- return SYMBOL_VALUE_ADDRESS (msymbol);
+ if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1)
+ error (_("Invalid register name `%s' on expression `%s'."),
+ regname, p->saved_arg);
+
+ write_exp_elt_opcode (OP_REGISTER);
+ str.ptr = regname;
+ str.length = len;
+ write_exp_string (str);
+ write_exp_elt_opcode (OP_REGISTER);
+
+ p->arg = s;
+ }
+ else
+ {
+ /* All the other tokens should be handled correctly by the generic
+ parser. */
+ return 0;
+ }
+
+ return 1;
}
-/* The rs6000 version of FRAME_SAVED_PC will almost work for us. The
- signal handler details are different, so we'll handle those here
- and call the rs6000 version to do the rest. */
-unsigned long
-ppc_linux_frame_saved_pc (struct frame_info *fi)
+/* 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)
{
- if (fi->signal_handler_caller)
+ struct minimal_symbol *sym;
+
+ if (!objfile)
{
- CORE_ADDR regs_addr =
- read_memory_integer (fi->frame + PPC_LINUX_REGS_PTR_OFFSET, 4);
- /* return the NIP in the regs array */
- return read_memory_integer (regs_addr + 4 * PPC_LINUX_PT_NIP, 4);
+ 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;
}
- return rs6000_frame_saved_pc (fi);
+ 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;
+ }
}
-void
-ppc_linux_init_extra_frame_info (int fromleaf, struct frame_info *fi)
+static void
+ppc_linux_spe_context_inferior_created (struct target_ops *t, int from_tty)
{
- rs6000_init_extra_frame_info (fromleaf, fi);
+ struct objfile *objfile;
+
+ ppc_linux_spe_context_lookup (NULL);
+ ALL_OBJFILES (objfile)
+ ppc_linux_spe_context_lookup (objfile);
+}
- if (fi->next != 0)
+static void
+ppc_linux_spe_context_solib_loaded (struct so_list *so)
+{
+ if (strstr (so->so_original_name, "/libspe") != NULL)
{
- /* We're called from get_prev_frame_info; check to see if
- this is a signal frame by looking to see if the pc points
- at trampoline code */
- if (ppc_linux_at_sigtramp_return_path (fi->pc))
- fi->signal_handler_caller = 1;
- else
- fi->signal_handler_caller = 0;
+ solib_read_symbols (so, 0);
+ ppc_linux_spe_context_lookup (so->objfile);
}
}
-int
-ppc_linux_frameless_function_invocation (struct frame_info *fi)
+static void
+ppc_linux_spe_context_solib_unloaded (struct so_list *so)
{
- /* We'll find the wrong thing if we let
- rs6000_frameless_function_invocation () search for a signal trampoline */
- if (ppc_linux_at_sigtramp_return_path (fi->pc))
- return 0;
- else
- return rs6000_frameless_function_invocation (fi);
+ if (so->objfile == spe_context_objfile)
+ ppc_linux_spe_context_lookup (NULL);
}
-void
-ppc_linux_frame_init_saved_regs (struct frame_info *fi)
+/* 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)
{
- if (fi->signal_handler_caller)
+ 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))
{
- CORE_ADDR regs_addr;
- int i;
- if (fi->saved_regs)
- return;
-
- frame_saved_regs_zalloc (fi);
-
- regs_addr =
- read_memory_integer (fi->frame + PPC_LINUX_REGS_PTR_OFFSET, 4);
- fi->saved_regs[PC_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_NIP;
- fi->saved_regs[PS_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_MSR;
- fi->saved_regs[CR_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_CCR;
- fi->saved_regs[LR_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_LNK;
- fi->saved_regs[CTR_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_CTR;
- fi->saved_regs[XER_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_XER;
- fi->saved_regs[MQ_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_MQ;
- for (i = 0; i < 32; i++)
- fi->saved_regs[GP0_REGNUM + i] = regs_addr + 4 * PPC_LINUX_PT_R0 + 4 * i;
- for (i = 0; i < 32; i++)
- fi->saved_regs[FP0_REGNUM + i] = regs_addr + 4 * PPC_LINUX_PT_FPR0 + 8 * i;
+ 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));
+
+ if (regnum < gdbarch_num_regs (gdbarch))
+ regcache_raw_read (cache->regcache, regnum, buf);
else
- rs6000_frame_init_saved_regs (fi);
+ gdbarch_pseudo_register_read (gdbarch, cache->regcache, regnum, buf);
+
+ return frame_unwind_got_bytes (this_frame, regnum, buf);
}
-CORE_ADDR
-ppc_linux_frame_chain (struct frame_info *thisframe)
+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)
{
- /* Kernel properly constructs the frame chain for the handler */
- if (thisframe->signal_handler_caller)
- return read_memory_integer ((thisframe)->frame, 4);
+ 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 rs6000_frame_chain (thisframe);
-}
-
-/* FIXME: Move the following to rs6000-tdep.c (or some other file where
- it may be used generically by ports which use either the SysV ABI or
- the EABI */
-
-/* round2 rounds x up to the nearest multiple of s assuming that s is a
- power of 2 */
-
-#undef round2
-#define round2(x,s) ((((long) (x) - 1) & ~(long)((s)-1)) + (s))
-
-/* Pass the arguments in either registers, or in the stack. Using the
- ppc sysv ABI, the first eight words of the argument list (that might
- be less than eight parameters if some parameters occupy more than one
- word) are passed in r3..r10 registers. float and double parameters are
- passed in fpr's, in addition to that. Rest of the parameters if any
- are passed in user stack.
-
- If the function is returning a structure, then the return address is passed
- in r3, then the first 7 words of the parametes can be passed in registers,
- starting from r4. */
-
-CORE_ADDR
-ppc_sysv_abi_push_arguments (nargs, args, sp, struct_return, struct_addr)
- int nargs;
- value_ptr *args;
- CORE_ADDR sp;
- int struct_return;
- CORE_ADDR struct_addr;
-{
- int argno;
- int greg, freg;
- int argstkspace;
- int structstkspace;
- int argoffset;
- int structoffset;
- value_ptr arg;
- struct type *type;
- int len;
- char old_sp_buf[4];
- CORE_ADDR saved_sp;
-
- greg = struct_return ? 4 : 3;
- freg = 1;
- argstkspace = 0;
- structstkspace = 0;
-
- /* Figure out how much new stack space is required for arguments
- which don't fit in registers. Unlike the PowerOpen ABI, the
- SysV ABI doesn't reserve any extra space for parameters which
- are put in registers. */
- for (argno = 0; argno < nargs; argno++)
+ return REG_UNAVAILABLE;
+
+ return REG_VALID;
+}
+
+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)
{
- arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
- len = TYPE_LENGTH (type);
+ 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);
+}
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
+static const struct frame_unwind ppu2spu_unwind = {
+ ARCH_FRAME,
+ default_frame_unwind_stop_reason,
+ 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;
+ static const char *const stap_integer_prefixes[] = { "i", NULL };
+ static const char *const stap_register_indirection_prefixes[] = { "(",
+ NULL };
+ static const char *const stap_register_indirection_suffixes[] = { ")",
+ NULL };
+
+ 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
+ let them default to 128-bit, since the debug info will give the
+ size of type actually used in each case. */
+ set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double);
+
+ /* 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);
+
+ /* SystemTap functions. */
+ set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
+ set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+ stap_register_indirection_prefixes);
+ set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+ stap_register_indirection_suffixes);
+ set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
+ set_gdbarch_stap_is_single_operand (gdbarch, ppc_stap_is_single_operand);
+ set_gdbarch_stap_parse_special_token (gdbarch,
+ ppc_stap_parse_special_token);
+
+ if (tdep->wordsize == 4)
+ {
+ /* Until November 2001, gcc did not comply with the 32 bit SysV
+ R4 ABI requirement that structures less than or equal to 8
+ bytes should be returned in registers. Instead GCC was using
+ the AIX/PowerOpen ABI - everything returned in memory
+ (well ignoring vectors that is). When this was corrected, it
+ wasn't fixed for GNU/Linux native platform. Use the
+ PowerOpen struct convention. */
+ set_gdbarch_return_value (gdbarch, ppc_linux_return_value);
+
+ set_gdbarch_memory_remove_breakpoint (gdbarch,
+ ppc_linux_memory_remove_breakpoint);
+
+ /* Shared library handling. */
+ set_gdbarch_skip_trampoline_code (gdbarch, ppc_skip_trampoline_code);
+ 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);
+
+ /* BFD target for core files. */
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE)
+ 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 (powerpc_so_ops.in_dynsym_resolve_code == NULL)
{
- if (freg <= 8)
- freg++;
- else
- {
- /* SysV ABI converts floats to doubles when placed in
- memory and requires 8 byte alignment */
- if (argstkspace & 0x4)
- argstkspace += 4;
- argstkspace += 8;
- }
+ powerpc_so_ops = svr4_so_ops;
+ /* Override dynamic resolve function. */
+ powerpc_so_ops.in_dynsym_resolve_code =
+ powerpc_linux_in_dynsym_resolve_code;
}
- else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */
+ set_solib_ops (gdbarch, &powerpc_so_ops);
+
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+ }
+
+ if (tdep->wordsize == 8)
+ {
+ if (tdep->elf_abi == POWERPC_ELF_V1)
{
- if (greg > 9)
- {
- greg = 11;
- if (argstkspace & 0x4)
- argstkspace += 4;
- argstkspace += 8;
- }
- else
- {
- if ((greg & 1) == 0)
- greg++;
- greg += 2;
- }
+ /* Handle PPC GNU/Linux 64-bit function pointers (which are really
+ function descriptors). */
+ set_gdbarch_convert_from_func_ptr_addr
+ (gdbarch, ppc64_convert_from_func_ptr_addr);
+
+ set_gdbarch_elf_make_msymbol_special
+ (gdbarch, ppc64_elf_make_msymbol_special);
}
else
{
- if (len > 4
- || TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
- {
- /* Rounding to the nearest multiple of 8 may not be necessary,
- but it is safe. Particularly since we don't know the
- field types of the structure */
- structstkspace += round2 (len, 8);
- }
- if (greg <= 10)
- greg++;
- else
- argstkspace += 4;
+ set_gdbarch_elf_make_msymbol_special
+ (gdbarch, ppc_elfv2_elf_make_msymbol_special);
+
+ set_gdbarch_skip_entrypoint (gdbarch, ppc_elfv2_skip_entrypoint);
}
- }
- /* Get current SP location */
- saved_sp = read_sp ();
+ /* Shared library handling. */
+ set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
- sp -= argstkspace + structstkspace;
+ /* Setting the correct XML syscall filename. */
+ set_xml_syscall_file_name (XML_SYSCALL_FILENAME_PPC64);
- /* Allocate space for backchain and callee's saved lr */
- sp -= 8;
+ /* Trampolines. */
+ tramp_frame_prepend_unwinder (gdbarch,
+ &ppc64_linux_sigaction_tramp_frame);
+ tramp_frame_prepend_unwinder (gdbarch,
+ &ppc64_linux_sighandler_tramp_frame);
- /* Make sure that we maintain 16 byte alignment */
- sp &= ~0x0f;
+ /* BFD target for core files. */
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE)
+ 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);
+ }
- /* Update %sp before proceeding any further */
- write_register (SP_REGNUM, sp);
+ /* PPC32 uses a different prpsinfo32 compared to most other Linux
+ archs. */
+ if (tdep->wordsize == 4)
+ set_gdbarch_elfcore_write_linux_prpsinfo (gdbarch,
+ elfcore_write_ppc_linux_prpsinfo32);
- /* write the backchain */
- store_address (old_sp_buf, 4, saved_sp);
- write_memory (sp, old_sp_buf, 4);
+ set_gdbarch_regset_from_core_section (gdbarch,
+ ppc_linux_regset_from_core_section);
+ set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description);
- argoffset = 8;
- structoffset = argoffset + argstkspace;
- freg = 1;
- greg = 3;
- /* Now fill in the registers and stack... */
- for (argno = 0; argno < nargs; argno++)
- {
- arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
- len = TYPE_LENGTH (type);
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- {
- if (freg <= 8)
- {
- if (len > 8)
- printf_unfiltered (
- "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
- memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + freg)],
- VALUE_CONTENTS (arg), len);
- freg++;
- }
- else
- {
- /* SysV ABI converts floats to doubles when placed in
- memory and requires 8 byte alignment */
- /* FIXME: Convert floats to doubles */
- if (argoffset & 0x4)
- argoffset += 4;
- write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len);
- argoffset += 8;
- }
- }
- else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */
- {
- if (greg > 9)
- {
- greg = 11;
- if (argoffset & 0x4)
- argoffset += 4;
- write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len);
- argoffset += 8;
- }
- else
- {
- if ((greg & 1) == 0)
- greg++;
-
- memcpy (®isters[REGISTER_BYTE (greg)],
- VALUE_CONTENTS (arg), 4);
- memcpy (®isters[REGISTER_BYTE (greg + 1)],
- VALUE_CONTENTS (arg) + 4, 4);
- greg += 2;
- }
- }
- else
+ if (tdesc_data)
+ {
+ const struct tdesc_feature *feature;
+
+ /* If we have target-described registers, then we can safely
+ reserve a number for PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM
+ (whether they are described or not). */
+ gdb_assert (gdbarch_num_regs (gdbarch) <= PPC_ORIG_R3_REGNUM);
+ set_gdbarch_num_regs (gdbarch, PPC_TRAP_REGNUM + 1);
+
+ /* If they are present, then assign them to the reserved number. */
+ feature = tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.power.linux");
+ if (feature != NULL)
{
- char val_buf[4];
- if (len > 4
- || TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
- {
- write_memory (sp + structoffset, VALUE_CONTENTS (arg), len);
- store_address (val_buf, 4, sp + structoffset);
- structoffset += round2 (len, 8);
- }
- else
- {
- memset (val_buf, 0, 4);
- memcpy (val_buf, VALUE_CONTENTS (arg), len);
- }
- if (greg <= 10)
- {
- *(int *) ®isters[REGISTER_BYTE (greg)] = 0;
- memcpy (®isters[REGISTER_BYTE (greg)], val_buf, 4);
- greg++;
- }
- else
- {
- write_memory (sp + argoffset, val_buf, 4);
- argoffset += 4;
- }
+ tdesc_numbered_register (feature, tdesc_data,
+ PPC_ORIG_R3_REGNUM, "orig_r3");
+ tdesc_numbered_register (feature, tdesc_data,
+ PPC_TRAP_REGNUM, "trap");
}
}
- target_store_registers (-1);
- return sp;
+ /* Enable Cell/B.E. if supported by the target. */
+ if (tdesc_compatible_p (info.target_desc,
+ bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu)))
+ {
+ /* 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,
+ ppc_linux_displaced_step_location);
+ }
+
+ set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_ppc_linux_tdep;
+
+void
+_initialize_ppc_linux_tdep (void)
+{
+ /* Register for all sub-familes of the POWER/PowerPC: 32-bit and
+ 64-bit PowerPC, and the older rs6k. */
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
+
+ /* 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 ();
+ initialize_tdesc_powerpc_cell32l ();
+ initialize_tdesc_powerpc_vsx32l ();
+ initialize_tdesc_powerpc_isa205_32l ();
+ initialize_tdesc_powerpc_isa205_altivec32l ();
+ initialize_tdesc_powerpc_isa205_vsx32l ();
+ initialize_tdesc_powerpc_64l ();
+ initialize_tdesc_powerpc_altivec64l ();
+ initialize_tdesc_powerpc_cell64l ();
+ initialize_tdesc_powerpc_vsx64l ();
+ initialize_tdesc_powerpc_isa205_64l ();
+ initialize_tdesc_powerpc_isa205_altivec64l ();
+ initialize_tdesc_powerpc_isa205_vsx64l ();
+ initialize_tdesc_powerpc_e500l ();
}
projects / deliverable / binutils-gdb.git / blobdiff