/* Target-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 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 "osabi.h"
#include "regset.h"
#include "solib-svr4.h"
+#include "solib.h"
+#include "solist.h"
#include "ppc-tdep.h"
+#include "ppc64-tdep.h"
+#include "ppc-linux-tdep.h"
+#include "arch/ppc-linux-common.h"
+#include "arch/ppc-linux-tdesc.h"
+#include "glibc-tdep.h"
#include "trad-frame.h"
#include "frame-unwind.h"
-
-/* The following instructions are used in the signal trampoline code
- on GNU/Linux PPC. The kernel used to use magic syscalls 0x6666 and
- 0x7777 but now uses the sigreturn syscalls. We check for both. */
-#define INSTR_LI_R0_0x6666 0x38006666
-#define INSTR_LI_R0_0x7777 0x38007777
-#define INSTR_LI_R0_NR_sigreturn 0x38000077
-#define INSTR_LI_R0_NR_rt_sigreturn 0x380000AC
-
-#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)
-
-static int ppc_linux_at_sigtramp_return_path (CORE_ADDR pc);
-
-/* Determine if pc is in a signal trampoline...
-
- Ha! That's not what this does at all. wait_for_inferior in
- infrun.c calls get_frame_type() in order to detect entry into a
- signal trampoline just after delivery of a signal. But on
- GNU/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.) */
-
-int
-ppc_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
-{
- CORE_ADDR lr;
- CORE_ADDR sp;
- CORE_ADDR tramp_sp;
- char buf[4];
- CORE_ADDR handler;
-
- lr = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
- if (!ppc_linux_at_sigtramp_return_path (lr))
- return 0;
-
- sp = read_register (SP_REGNUM);
-
- if (target_read_memory (sp, buf, sizeof (buf)) != 0)
- return 0;
-
- tramp_sp = extract_unsigned_integer (buf, 4);
-
- if (target_read_memory (tramp_sp + PPC_LINUX_HANDLER_PTR_OFFSET, buf,
- sizeof (buf)) != 0)
- return 0;
-
- handler = extract_unsigned_integer (buf, 4);
-
- return (pc == handler || pc == handler + 4);
-}
-
-static int
-insn_is_sigreturn (unsigned long pcinsn)
-{
- switch(pcinsn)
- {
- case INSTR_LI_R0_0x6666:
- case INSTR_LI_R0_0x7777:
- case INSTR_LI_R0_NR_sigreturn:
- case INSTR_LI_R0_NR_rt_sigreturn:
- return 1;
- default:
- return 0;
- }
-}
-
-/*
- * 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 int
-ppc_linux_at_sigtramp_return_path (CORE_ADDR pc)
-{
- char buf[12];
- unsigned long pcinsn;
- if (target_read_memory (pc - 4, buf, sizeof (buf)) != 0)
- return 0;
-
- /* extract the instruction at the pc */
- pcinsn = extract_unsigned_integer (buf + 4, 4);
-
- return (
- (insn_is_sigreturn (pcinsn)
- && extract_unsigned_integer (buf + 8, 4) == INSTR_SC)
- ||
- (pcinsn == INSTR_SC
- && insn_is_sigreturn (extract_unsigned_integer (buf, 4))));
-}
-
-static CORE_ADDR
-ppc_linux_skip_trampoline_code (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;
-
- objfile = sect->objfile;
-
- /* Pick up the instruction at pc. It had better be of the
- form
- li r11, IDX
-
- where IDX is an index into the plt_table. */
-
- if (target_read_memory (pc, buf, 4) != 0)
- return 0;
- insn = extract_unsigned_integer (buf, 4);
-
- if ((insn & 0xffff0000) != 0x39600000 /* li r11, VAL */ )
- return 0;
-
- reloc_index = (insn << 16) >> 16;
-
- /* 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)
- {
- 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;
- }
-
- /* Make sure we have all the information we need. */
- if (plt_start == 0 || num_slots == -1 || symtab == 0 || strtab == 0)
- return 0;
-
- /* Compute the value of the plt table */
- plt_table = plt_start + 72 + 8 * num_slots;
-
- /* Get address of the relocation entry (Elf32_Rela) */
- if (target_read_memory (plt_table + reloc_index, buf, 4) != 0)
- return 0;
- reloc = extract_unsigned_integer (buf, 4);
-
- sect = find_pc_section (reloc);
- if (!sect)
- return 0;
-
- if (strcmp (sect->the_bfd_section->name, ".text") == 0)
- return reloc;
-
- /* 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);
-
- /* Shift out the relocation type leaving just the symbol index */
- /* symidx = ELF32_R_SYM(symidx); */
- symidx = symidx >> 8;
-
- /* compute the address of the symbol */
- sym = symtab + symidx * 4;
-
- /* Fetch the string table index */
- if (target_read_memory (sym, buf, 4) != 0)
- return 0;
- symidx = extract_unsigned_integer (buf, 4);
-
- /* 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;
-
- /* 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);
- if (!msymbol)
- return 0;
-
- return SYMBOL_VALUE_ADDRESS (msymbol);
-}
+#include "tramp-frame.h"
+#include "observable.h"
+#include "auxv.h"
+#include "elf/common.h"
+#include "elf/ppc64.h"
+#include "arch-utils.h"
+#include "xml-syscall.h"
+#include "linux-tdep.h"
+#include "linux-record.h"
+#include "record-full.h"
+#include "infrun.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"
+
+#include "features/rs6000/powerpc-32l.c"
+#include "features/rs6000/powerpc-altivec32l.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-isa205-ppr-dscr-vsx32l.c"
+#include "features/rs6000/powerpc-isa207-vsx32l.c"
+#include "features/rs6000/powerpc-isa207-htm-vsx32l.c"
+#include "features/rs6000/powerpc-64l.c"
+#include "features/rs6000/powerpc-altivec64l.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-isa205-ppr-dscr-vsx64l.c"
+#include "features/rs6000/powerpc-isa207-vsx64l.c"
+#include "features/rs6000/powerpc-isa207-htm-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,
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
+ branches a short distance to the code which actually does the
resolving.
(gdb) x/2i 0x100409d4
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.
+ resolved to contain a branch that takes us directly to shr1.
(The real one, not the PLT entry.)
(gdb) x/2i 0x100409d4
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.
+ 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.
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 an illegal instruction trap was
+ 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
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.
+ 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
else in the event that some other platform has similar needs with
regard to removing breakpoints in some potentially self modifying
code. */
-int
-ppc_linux_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
+static int
+ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
+ CORE_ADDR addr = bp_tgt->reqstd_address;
const unsigned char *bp;
int val;
int bplen;
- char old_contents[BREAKPOINT_MAX];
+ gdb_byte old_contents[BREAKPOINT_MAX];
/* Determine appropriate breakpoint contents and size for this address. */
- bp = BREAKPOINT_FROM_PC (&addr, &bplen);
- if (bp == NULL)
- error ("Software breakpoints not implemented for this target.");
+ bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
+ /* Make sure we see the memory breakpoints. */
+ scoped_restore restore_memory
+ = make_scoped_restore_show_memory_breakpoints (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 */
+ old value. */
if (val == 0 && memcmp (bp, old_contents, bplen) == 0)
- val = target_write_memory (addr, contents_cache, bplen);
+ val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen);
return val;
}
which were added later, do get returned in a register though. */
static enum return_value_convention
-ppc_linux_return_value (struct gdbarch *gdbarch, struct type *valtype,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+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_VECTOR (valtype)))
return RETURN_VALUE_STRUCT_CONVENTION;
else
- return ppc_sysv_abi_return_value (gdbarch, valtype, regcache, readbuf,
- writebuf);
+ return ppc_sysv_abi_return_value (gdbarch, function, valtype, regcache,
+ readbuf, writebuf);
}
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for GNU/Linux PPC targets using the struct offsets
- defined in link.h (but without actual reference to that file).
+/* PLT stub in an executable. */
+static const 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 }
+ };
- This makes it possible to access GNU/Linux PPC shared libraries
- from a GDB that was not built on an GNU/Linux PPC host (for cross
- debugging). */
+/* PLT stubs in a shared library or PIE.
+ The first variant is used when the PLT entry is within +/-32k of
+ the GOT pointer (r30). */
+static const struct ppc_insn_pattern powerpc32_plt_stub_so_1[] =
+ {
+ { 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0, 0, 0 }
+ };
+
+/* The second variant is used when the PLT entry is more than +/-32k
+ from the GOT pointer (r30). */
+static const struct ppc_insn_pattern powerpc32_plt_stub_so_2[] =
+ {
+ { 0xffff0000, 0x3d7e0000, 0 }, /* addis r11, r30, xxxx */
+ { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0, 0, 0 }
+ };
+
+/* The max number of insns we check using ppc_insns_match_pattern. */
+#define POWERPC32_PLT_CHECK_LEN (ARRAY_SIZE (powerpc32_plt_stub) - 1)
+
+/* 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. */
-struct link_map_offsets *
-ppc_linux_svr4_fetch_link_map_offsets (void)
+static int
+powerpc_linux_in_dynsym_resolve_code (CORE_ADDR pc)
{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
+ struct bound_minimal_symbol sym;
- if (lmp == NULL)
- {
- lmp = &lmo;
+ /* 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 (sym.minsym->linkage_name (), "__glink") == 0
+ || strcmp (sym.minsym->linkage_name (), "__glink_PLTresolve") == 0))
+ return 1;
- lmo.r_debug_size = 8; /* The actual size is 20 bytes, but
- this is all we need. */
- lmo.r_map_offset = 4;
- lmo.r_map_size = 4;
+ return 0;
+}
+
+/* Follow PLT stub to actual routine.
- lmo.link_map_size = 20; /* The actual size is 560 bytes, but
- this is all we need. */
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
+ When the execution direction is EXEC_REVERSE, scan backward to
+ check whether we are in the middle of a PLT stub. Currently,
+ we only look-behind at most 4 instructions (the max length of a PLT
+ stub sequence. */
- lmo.l_name_offset = 4;
- lmo.l_name_size = 4;
+static CORE_ADDR
+ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ unsigned int insnbuf[POWERPC32_PLT_CHECK_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;
+ int scan_limit, i;
- lmo.l_next_offset = 12;
- lmo.l_next_size = 4;
+ scan_limit = 1;
+ /* When reverse-debugging, scan backward to check whether we are
+ in the middle of trampoline code. */
+ if (execution_direction == EXEC_REVERSE)
+ scan_limit = 4; /* At most 4 instructions. */
- lmo.l_prev_offset = 16;
- lmo.l_prev_size = 4;
+ for (i = 0; i < scan_limit; i++)
+ {
+ if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf))
+ {
+ /* Calculate PLT entry address from
+ lis r11, xxxx
+ lwz r11, xxxx(r11). */
+ target = ((ppc_insn_d_field (insnbuf[0]) << 16)
+ + ppc_insn_d_field (insnbuf[1]));
+ }
+ else if (i < ARRAY_SIZE (powerpc32_plt_stub_so_1) - 1
+ && ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_1,
+ insnbuf))
+ {
+ /* Calculate PLT entry address from
+ lwz r11, xxxx(r30). */
+ target = (ppc_insn_d_field (insnbuf[0])
+ + get_frame_register_unsigned (frame,
+ tdep->ppc_gp0_regnum + 30));
+ }
+ else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_2,
+ insnbuf))
+ {
+ /* Calculate PLT entry address from
+ addis r11, r30, xxxx
+ lwz r11, xxxx(r11). */
+ target = ((ppc_insn_d_field (insnbuf[0]) << 16)
+ + ppc_insn_d_field (insnbuf[1])
+ + get_frame_register_unsigned (frame,
+ tdep->ppc_gp0_regnum + 30));
+ }
+ else
+ {
+ /* Scan backward one more instruction if it doesn't match. */
+ pc -= 4;
+ continue;
+ }
+
+ target = read_memory_unsigned_integer (target, 4, byte_order);
+ return target;
}
- return lmp;
+ return 0;
}
+/* Wrappers to handle Linux-only registers. */
-/* Macros for matching instructions. Note that, since all the
- operands are masked off before they're or-ed into the instruction,
- you can use -1 to make masks. */
-
-#define insn_d(opcd, rts, ra, d) \
- ((((opcd) & 0x3f) << 26) \
- | (((rts) & 0x1f) << 21) \
- | (((ra) & 0x1f) << 16) \
- | ((d) & 0xffff))
-
-#define insn_ds(opcd, rts, ra, d, xo) \
- ((((opcd) & 0x3f) << 26) \
- | (((rts) & 0x1f) << 21) \
- | (((ra) & 0x1f) << 16) \
- | ((d) & 0xfffc) \
- | ((xo) & 0x3))
-
-#define insn_xfx(opcd, rts, spr, xo) \
- ((((opcd) & 0x3f) << 26) \
- | (((rts) & 0x1f) << 21) \
- | (((spr) & 0x1f) << 16) \
- | (((spr) & 0x3e0) << 6) \
- | (((xo) & 0x3ff) << 1))
-
-/* Read a PPC instruction from memory. PPC instructions are always
- big-endian, no matter what endianness the program is running in, so
- we can't use read_memory_integer or one of its friends here. */
-static unsigned int
-read_insn (CORE_ADDR pc)
+static void
+ppc_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
- unsigned char buf[4];
+ const struct ppc_reg_offsets *offsets
+ = (const struct ppc_reg_offsets *) regset->regmap;
- read_memory (pc, buf, 4);
- return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-}
+ ppc_supply_gregset (regset, regcache, regnum, gregs, len);
+ if (ppc_linux_trap_reg_p (regcache->arch ()))
+ {
+ /* "orig_r3" is stored 2 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
+ ppc_supply_reg (regcache, PPC_ORIG_R3_REGNUM, (const gdb_byte *) 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, (const gdb_byte *) gregs,
+ offsets->pc_offset + 8 * offsets->gpr_size,
+ offsets->gpr_size);
+ }
+}
-/* An instruction to match. */
-struct insn_pattern
+static void
+ppc_linux_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
{
- unsigned int mask; /* mask the insn with this... */
- unsigned int data; /* ...and see if it matches this. */
- int optional; /* If non-zero, this insn may be absent. */
-};
+ const struct ppc_reg_offsets *offsets
+ = (const struct ppc_reg_offsets *) regset->regmap;
-/* Return non-zero if the instructions at PC match the series
- described in PATTERN, or zero otherwise. PATTERN is an array of
- 'struct insn_pattern' objects, terminated by an entry whose mask is
- zero.
-
- When the match is successful, fill INSN[i] with what PATTERN[i]
- matched. If PATTERN[i] is optional, and the instruction wasn't
- present, set INSN[i] to 0 (which is not a valid PPC instruction).
- INSN should have as many elements as PATTERN. Note that, if
- PATTERN contains optional instructions which aren't present in
- memory, then INSN will have holes, so INSN[i] isn't necessarily the
- i'th instruction in memory. */
-static int
-insns_match_pattern (CORE_ADDR pc,
- struct insn_pattern *pattern,
- unsigned int *insn)
-{
- int i;
+ /* Clear areas in the linux gregset not written elsewhere. */
+ if (regnum == -1)
+ memset (gregs, 0, len);
- for (i = 0; pattern[i].mask; i++)
+ ppc_collect_gregset (regset, regcache, regnum, gregs, len);
+
+ if (ppc_linux_trap_reg_p (regcache->arch ()))
{
- insn[i] = read_insn (pc);
- if ((insn[i] & pattern[i].mask) == pattern[i].data)
- pc += 4;
- else if (pattern[i].optional)
- insn[i] = 0;
- else
- return 0;
+ /* "orig_r3" is stored 2 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
+ ppc_collect_reg (regcache, PPC_ORIG_R3_REGNUM, (gdb_byte *) 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, (gdb_byte *) gregs,
+ offsets->pc_offset + 8 * offsets->gpr_size,
+ offsets->gpr_size);
}
-
- return 1;
}
+/* 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
+ };
-/* Return the 'd' field of the d-form instruction INSN, properly
- sign-extended. */
-static CORE_ADDR
-insn_d_field (unsigned int insn)
-{
- return ((((CORE_ADDR) insn & 0xffff) ^ 0x8000) - 0x8000);
-}
+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
+ };
+static const struct regset ppc32_linux_gregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_linux_supply_gregset,
+ ppc_linux_collect_gregset
+};
-/* Return the 'ds' field of the ds-form instruction INSN, with the two
- zero bits concatenated at the right, and properly
- sign-extended. */
-static CORE_ADDR
-insn_ds_field (unsigned int insn)
-{
- return ((((CORE_ADDR) insn & 0xfffc) ^ 0x8000) - 0x8000);
-}
+static const struct regset ppc64_linux_gregset = {
+ &ppc64_linux_reg_offsets,
+ ppc_linux_supply_gregset,
+ ppc_linux_collect_gregset
+};
+static const struct regset ppc32_linux_fpregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_fpregset,
+ ppc_collect_fpregset
+};
-/* If DESC is the address of a 64-bit PowerPC GNU/Linux function
- descriptor, return the descriptor's entry point. */
-static CORE_ADDR
-ppc64_desc_entry_point (CORE_ADDR desc)
-{
- /* The first word of the descriptor is the entry point. */
- return (CORE_ADDR) read_memory_unsigned_integer (desc, 8);
-}
+static const struct regcache_map_entry ppc32_le_linux_vrregmap[] =
+ {
+ { 32, PPC_VR0_REGNUM, 16 },
+ { 1, PPC_VSCR_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 1, PPC_VRSAVE_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 0 }
+ };
+static const struct regcache_map_entry ppc32_be_linux_vrregmap[] =
+ {
+ { 32, PPC_VR0_REGNUM, 16 },
+ { 1, REGCACHE_MAP_SKIP, 12},
+ { 1, PPC_VSCR_REGNUM, 4 },
+ { 1, PPC_VRSAVE_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 0 }
+ };
-/* Pattern for the standard linkage function. These are built by
- build_plt_stub in elf64-ppc.c, whose GLINK argument is always
- zero. */
-static struct insn_pattern ppc64_standard_linkage[] =
+static const struct regset ppc32_le_linux_vrregset = {
+ ppc32_le_linux_vrregmap,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+static const struct regset ppc32_be_linux_vrregset = {
+ ppc32_be_linux_vrregmap,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+static const struct regcache_map_entry ppc32_linux_vsxregmap[] =
{
- /* addis r12, r2, <any> */
- { insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
+ { 32, PPC_VSR0_UPPER_REGNUM, 8 },
+ { 0 }
+ };
- /* std r2, 40(r1) */
- { -1, insn_ds (62, 2, 1, 40, 0), 0 },
+static const struct regset ppc32_linux_vsxregset = {
+ ppc32_linux_vsxregmap,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- /* ld r11, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
+/* Program Priorty Register regmap. */
- /* addis r12, r12, 1 <optional> */
- { insn_d (-1, -1, -1, -1), insn_d (15, 12, 2, 1), 1 },
+static const struct regcache_map_entry ppc32_regmap_ppr[] =
+ {
+ { 1, PPC_PPR_REGNUM, 8 },
+ { 0 }
+ };
- /* ld r2, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 12, 0, 0), 0 },
+/* Program Priorty Register regset. */
- /* addis r12, r12, 1 <optional> */
- { insn_d (-1, -1, -1, -1), insn_d (15, 12, 2, 1), 1 },
+const struct regset ppc32_linux_pprregset = {
+ ppc32_regmap_ppr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- /* mtctr r11 */
- { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 11, 9, 467),
- 0 },
+/* Data Stream Control Register regmap. */
- /* ld r11, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
-
- /* bctr */
- { -1, 0x4e800420, 0 },
+static const struct regcache_map_entry ppc32_regmap_dscr[] =
+ {
+ { 1, PPC_DSCR_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Data Stream Control Register regset. */
+
+const struct regset ppc32_linux_dscrregset = {
+ ppc32_regmap_dscr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Target Address Register regmap. */
- { 0, 0, 0 }
+static const struct regcache_map_entry ppc32_regmap_tar[] =
+ {
+ { 1, PPC_TAR_REGNUM, 8 },
+ { 0 }
};
-#define PPC64_STANDARD_LINKAGE_LEN \
- (sizeof (ppc64_standard_linkage) / sizeof (ppc64_standard_linkage[0]))
+/* Target Address Register regset. */
-/* Recognize a 64-bit PowerPC GNU/Linux linkage function --- what GDB
- calls a "solib trampoline". */
-static int
-ppc64_in_solib_call_trampoline (CORE_ADDR pc, char *name)
-{
- /* Detecting solib call trampolines on PPC64 GNU/Linux is a pain.
-
- It's not specifically solib call trampolines that are the issue.
- Any call from one function to another function that uses a
- different TOC requires a trampoline, to save the caller's TOC
- pointer and then load the callee's TOC. An executable or shared
- library may have more than one TOC, so even intra-object calls
- may require a trampoline. Since executable and shared libraries
- will all have their own distinct TOCs, every inter-object call is
- also an inter-TOC call, and requires a trampoline --- so "solib
- call trampolines" are just a special case.
-
- The 64-bit PowerPC GNU/Linux ABI calls these call trampolines
- "linkage functions". Since they need to be near the functions
- that call them, they all appear in .text, not in any special
- section. The .plt section just contains an array of function
- descriptors, from which the linkage functions load the callee's
- entry point, TOC value, and environment pointer. So
- in_plt_section is useless. The linkage functions don't have any
- special linker symbols to name them, either.
-
- The only way I can see to recognize them is to actually look at
- their code. They're generated by ppc_build_one_stub and some
- other functions in bfd/elf64-ppc.c, so that should show us all
- the instruction sequences we need to recognize. */
- unsigned int insn[PPC64_STANDARD_LINKAGE_LEN];
-
- return insns_match_pattern (pc, ppc64_standard_linkage, insn);
-}
+const struct regset ppc32_linux_tarregset = {
+ ppc32_regmap_tar,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+/* Event-Based Branching regmap. */
-/* When the dynamic linker is doing lazy symbol resolution, the first
- call to a function in another object will go like this:
+static const struct regcache_map_entry ppc32_regmap_ebb[] =
+ {
+ { 1, PPC_EBBRR_REGNUM, 8 },
+ { 1, PPC_EBBHR_REGNUM, 8 },
+ { 1, PPC_BESCR_REGNUM, 8 },
+ { 0 }
+ };
- - The user's function calls the linkage function:
+/* Event-Based Branching regset. */
- 100007c4: 4b ff fc d5 bl 10000498
- 100007c8: e8 41 00 28 ld r2,40(r1)
+const struct regset ppc32_linux_ebbregset = {
+ ppc32_regmap_ebb,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- - The linkage function loads the entry point (and other stuff) from
- the function descriptor in the PLT, and jumps to it:
+/* Performance Monitoring Unit regmap. */
- 10000498: 3d 82 00 00 addis r12,r2,0
- 1000049c: f8 41 00 28 std r2,40(r1)
- 100004a0: e9 6c 80 98 ld r11,-32616(r12)
- 100004a4: e8 4c 80 a0 ld r2,-32608(r12)
- 100004a8: 7d 69 03 a6 mtctr r11
- 100004ac: e9 6c 80 a8 ld r11,-32600(r12)
- 100004b0: 4e 80 04 20 bctr
+static const struct regcache_map_entry ppc32_regmap_pmu[] =
+ {
+ { 1, PPC_SIAR_REGNUM, 8 },
+ { 1, PPC_SDAR_REGNUM, 8 },
+ { 1, PPC_SIER_REGNUM, 8 },
+ { 1, PPC_MMCR2_REGNUM, 8 },
+ { 1, PPC_MMCR0_REGNUM, 8 },
+ { 0 }
+ };
- - But since this is the first time that PLT entry has been used, it
- sends control to its glink entry. That loads the number of the
- PLT entry and jumps to the common glink0 code:
+/* Performance Monitoring Unit regset. */
- 10000c98: 38 00 00 00 li r0,0
- 10000c9c: 4b ff ff dc b 10000c78
+const struct regset ppc32_linux_pmuregset = {
+ ppc32_regmap_pmu,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- - The common glink0 code then transfers control to the dynamic
- linker's fixup code:
+/* Hardware Transactional Memory special-purpose register regmap. */
- 10000c78: e8 41 00 28 ld r2,40(r1)
- 10000c7c: 3d 82 00 00 addis r12,r2,0
- 10000c80: e9 6c 80 80 ld r11,-32640(r12)
- 10000c84: e8 4c 80 88 ld r2,-32632(r12)
- 10000c88: 7d 69 03 a6 mtctr r11
- 10000c8c: e9 6c 80 90 ld r11,-32624(r12)
- 10000c90: 4e 80 04 20 bctr
+static const struct regcache_map_entry ppc32_regmap_tm_spr[] =
+ {
+ { 1, PPC_TFHAR_REGNUM, 8 },
+ { 1, PPC_TEXASR_REGNUM, 8 },
+ { 1, PPC_TFIAR_REGNUM, 8 },
+ { 0 }
+ };
- Eventually, this code will figure out how to skip all of this,
- including the dynamic linker. At the moment, we just get through
- the linkage function. */
+/* Hardware Transactional Memory special-purpose register regset. */
-/* If the current thread is about to execute a series of instructions
- at PC matching the ppc64_standard_linkage pattern, and INSN is the result
- from that pattern match, return the code address to which the
- standard linkage function will send them. (This doesn't deal with
- dynamic linker lazy symbol resolution stubs.) */
-static CORE_ADDR
-ppc64_standard_linkage_target (CORE_ADDR pc, unsigned int *insn)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+const struct regset ppc32_linux_tm_sprregset = {
+ ppc32_regmap_tm_spr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- /* The address of the function descriptor this linkage function
- references. */
- CORE_ADDR desc
- = ((CORE_ADDR) read_register (tdep->ppc_gp0_regnum + 2)
- + (insn_d_field (insn[0]) << 16)
- + insn_ds_field (insn[2]));
+/* Regmaps for the Hardware Transactional Memory checkpointed
+ general-purpose regsets for 32-bit, 64-bit big-endian, and 64-bit
+ little endian targets. The ptrace and core file buffers for 64-bit
+ targets use 8-byte fields for the 4-byte registers, and the
+ position of the register in the fields depends on the endianness.
+ The 32-bit regmap is the same for both endian types because the
+ fields are all 4-byte long.
+
+ The layout of checkpointed GPR regset is the same as a regular
+ struct pt_regs, but we skip all registers that are not actually
+ checkpointed by the processor (e.g. msr, nip), except when
+ generating a core file. The 64-bit regset is 48 * 8 bytes long.
+ In some 64-bit kernels, the regset for a 32-bit inferior has the
+ same length, but all the registers are squeezed in the first half
+ (48 * 4 bytes). The pt_regs struct calls the regular cr ccr, but
+ we use ccr for "checkpointed condition register". Note that CR
+ (condition register) field 0 is not checkpointed, but the kernel
+ returns all 4 bytes. The skipped registers should not be touched
+ when writing the regset to the inferior (with
+ PTRACE_SETREGSET). */
+
+static const struct regcache_map_entry ppc32_regmap_cgpr[] =
+ {
+ { 32, PPC_CR0_REGNUM, 4 },
+ { 3, REGCACHE_MAP_SKIP, 4 }, /* nip, msr, orig_gpr3. */
+ { 1, PPC_CCTR_REGNUM, 4 },
+ { 1, PPC_CLR_REGNUM, 4 },
+ { 1, PPC_CXER_REGNUM, 4 },
+ { 1, PPC_CCR_REGNUM, 4 },
+ { 9, REGCACHE_MAP_SKIP, 4 }, /* All the rest. */
+ { 0 }
+ };
- /* The first word of the descriptor is the entry point. Return that. */
- return ppc64_desc_entry_point (desc);
-}
+static const struct regcache_map_entry ppc64_le_regmap_cgpr[] =
+ {
+ { 32, PPC_CR0_REGNUM, 8 },
+ { 3, REGCACHE_MAP_SKIP, 8 },
+ { 1, PPC_CCTR_REGNUM, 8 },
+ { 1, PPC_CLR_REGNUM, 8 },
+ { 1, PPC_CXER_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* CXER padding. */
+ { 1, PPC_CCR_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4}, /* CCR padding. */
+ { 9, REGCACHE_MAP_SKIP, 8},
+ { 0 }
+ };
+static const struct regcache_map_entry ppc64_be_regmap_cgpr[] =
+ {
+ { 32, PPC_CR0_REGNUM, 8 },
+ { 3, REGCACHE_MAP_SKIP, 8 },
+ { 1, PPC_CCTR_REGNUM, 8 },
+ { 1, PPC_CLR_REGNUM, 8 },
+ { 1, REGCACHE_MAP_SKIP, 4}, /* CXER padding. */
+ { 1, PPC_CXER_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4}, /* CCR padding. */
+ { 1, PPC_CCR_REGNUM, 4 },
+ { 9, REGCACHE_MAP_SKIP, 8},
+ { 0 }
+ };
-/* Given that we've begun executing a call trampoline at PC, return
- the entry point of the function the trampoline will go to. */
-static CORE_ADDR
-ppc64_skip_trampoline_code (CORE_ADDR pc)
-{
- unsigned int ppc64_standard_linkage_insn[PPC64_STANDARD_LINKAGE_LEN];
+/* Regsets for the Hardware Transactional Memory checkpointed
+ general-purpose registers for 32-bit, 64-bit big-endian, and 64-bit
+ little endian targets.
- if (insns_match_pattern (pc, ppc64_standard_linkage,
- ppc64_standard_linkage_insn))
- return ppc64_standard_linkage_target (pc, ppc64_standard_linkage_insn);
- else
- return 0;
-}
+ Some 64-bit kernels generate a checkpointed gpr note section with
+ 48*8 bytes for a 32-bit thread, of which only 48*4 are actually
+ used, so we set the variable size flag in the corresponding regset
+ to accept this case. */
+static const struct regset ppc32_linux_cgprregset = {
+ ppc32_regmap_cgpr,
+ regcache_supply_regset,
+ regcache_collect_regset,
+ REGSET_VARIABLE_SIZE
+};
-/* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG) on PPC64
- GNU/Linux.
-
- Usually a function pointer's representation is simply the address
- of the function. On GNU/Linux on the 64-bit PowerPC however, a
- function pointer is represented by a pointer to a TOC entry. This
- TOC entry contains three words, the first word is the address of
- the function, the second word is the TOC pointer (r2), and the
- third word is the static chain value. Throughout GDB it is
- currently assumed that a function pointer contains the address of
- the function, which is not easy to fix. In addition, the
- conversion of a function address to a function pointer would
- require allocation of a TOC entry in the inferior's memory space,
- with all its drawbacks. To be able to call C++ virtual methods in
- the inferior (which are called via function pointers),
- find_function_addr uses this function to get the function address
- from a function pointer. */
-
-/* If ADDR points at what is clearly a function descriptor, transform
- it into the address of the corresponding function. Be
- conservative, otherwize GDB will do the transformation on any
- random addresses such as occures when there is no symbol table. */
+static const struct regset ppc64_be_linux_cgprregset = {
+ ppc64_be_regmap_cgpr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
-static CORE_ADDR
-ppc64_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
- CORE_ADDR addr,
- struct target_ops *targ)
+static const struct regset ppc64_le_linux_cgprregset = {
+ ppc64_le_regmap_cgpr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Hardware Transactional Memory checkpointed floating-point regmap. */
+
+static const struct regcache_map_entry ppc32_regmap_cfpr[] =
+ {
+ { 32, PPC_CF0_REGNUM, 8 },
+ { 1, PPC_CFPSCR_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed floating-point regset. */
+
+const struct regset ppc32_linux_cfprregset = {
+ ppc32_regmap_cfpr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Regmaps for the Hardware Transactional Memory checkpointed vector
+ regsets, for big and little endian targets. The position of the
+ 4-byte VSCR in its 16-byte field depends on the endianness. */
+
+static const struct regcache_map_entry ppc32_le_regmap_cvmx[] =
+ {
+ { 32, PPC_CVR0_REGNUM, 16 },
+ { 1, PPC_CVSCR_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 1, PPC_CVRSAVE_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 0 }
+ };
+
+static const struct regcache_map_entry ppc32_be_regmap_cvmx[] =
+ {
+ { 32, PPC_CVR0_REGNUM, 16 },
+ { 1, REGCACHE_MAP_SKIP, 12 },
+ { 1, PPC_CVSCR_REGNUM, 4 },
+ { 1, PPC_CVRSAVE_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 12},
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed vector regsets, for little
+ and big endian targets. */
+
+static const struct regset ppc32_le_linux_cvmxregset = {
+ ppc32_le_regmap_cvmx,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+static const struct regset ppc32_be_linux_cvmxregset = {
+ ppc32_be_regmap_cvmx,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Hardware Transactional Memory checkpointed vector-scalar regmap. */
+
+static const struct regcache_map_entry ppc32_regmap_cvsx[] =
+ {
+ { 32, PPC_CVSR0_UPPER_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed vector-scalar regset. */
+
+const struct regset ppc32_linux_cvsxregset = {
+ ppc32_regmap_cvsx,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Hardware Transactional Memory checkpointed Program Priority Register
+ regmap. */
+
+static const struct regcache_map_entry ppc32_regmap_cppr[] =
+ {
+ { 1, PPC_CPPR_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed Program Priority Register
+ regset. */
+
+const struct regset ppc32_linux_cpprregset = {
+ ppc32_regmap_cppr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Hardware Transactional Memory checkpointed Data Stream Control
+ Register regmap. */
+
+static const struct regcache_map_entry ppc32_regmap_cdscr[] =
+ {
+ { 1, PPC_CDSCR_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed Data Stream Control
+ Register regset. */
+
+const struct regset ppc32_linux_cdscrregset = {
+ ppc32_regmap_cdscr,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+/* Hardware Transactional Memory checkpointed Target Address Register
+ regmap. */
+
+static const struct regcache_map_entry ppc32_regmap_ctar[] =
+ {
+ { 1, PPC_CTAR_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Hardware Transactional Memory checkpointed Target Address Register
+ regset. */
+
+const struct regset ppc32_linux_ctarregset = {
+ ppc32_regmap_ctar,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
+
+const struct regset *
+ppc_linux_gregset (int wordsize)
{
- struct section_table *s = target_section_by_addr (targ, addr);
+ return wordsize == 8 ? &ppc64_linux_gregset : &ppc32_linux_gregset;
+}
- /* Check if ADDR points to a function descriptor. */
- if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
- return get_target_memory_unsigned (targ, addr, 8);
+const struct regset *
+ppc_linux_fpregset (void)
+{
+ return &ppc32_linux_fpregset;
+}
- return addr;
+const struct regset *
+ppc_linux_vrregset (struct gdbarch *gdbarch)
+{
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ return &ppc32_be_linux_vrregset;
+ else
+ return &ppc32_le_linux_vrregset;
}
-static void
-right_supply_register (struct regcache *regcache, int wordsize, int regnum,
- const bfd_byte *buf)
+const struct regset *
+ppc_linux_vsxregset (void)
{
- regcache_raw_supply (regcache, regnum,
- (buf + wordsize - register_size (current_gdbarch, regnum)));
+ return &ppc32_linux_vsxregset;
}
-/* Extract the register values found in the WORDSIZED ABI GREGSET,
- storing their values in REGCACHE. Note that some are left-aligned,
- while others are right aligned. */
+const struct regset *
+ppc_linux_cgprregset (struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-void
-ppc_linux_supply_gregset (struct regcache *regcache,
- int regnum, const void *gregs, size_t size,
- int wordsize)
+ if (tdep->wordsize == 4)
+ {
+ return &ppc32_linux_cgprregset;
+ }
+ else
+ {
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ return &ppc64_be_linux_cgprregset;
+ else
+ return &ppc64_le_linux_cgprregset;
+ }
+}
+
+const struct regset *
+ppc_linux_cvmxregset (struct gdbarch *gdbarch)
{
- int regi;
- struct gdbarch *regcache_arch = get_regcache_arch (regcache);
- struct gdbarch_tdep *regcache_tdep = gdbarch_tdep (regcache_arch);
- const bfd_byte *buf = gregs;
-
- for (regi = 0; regi < ppc_num_gprs; regi++)
- right_supply_register (regcache, wordsize,
- regcache_tdep->ppc_gp0_regnum + regi,
- buf + wordsize * regi);
-
- right_supply_register (regcache, wordsize, gdbarch_pc_regnum (regcache_arch),
- buf + wordsize * PPC_LINUX_PT_NIP);
- right_supply_register (regcache, wordsize, regcache_tdep->ppc_lr_regnum,
- buf + wordsize * PPC_LINUX_PT_LNK);
- regcache_raw_supply (regcache, regcache_tdep->ppc_cr_regnum,
- buf + wordsize * PPC_LINUX_PT_CCR);
- regcache_raw_supply (regcache, regcache_tdep->ppc_xer_regnum,
- buf + wordsize * PPC_LINUX_PT_XER);
- regcache_raw_supply (regcache, regcache_tdep->ppc_ctr_regnum,
- buf + wordsize * PPC_LINUX_PT_CTR);
- if (regcache_tdep->ppc_mq_regnum != -1)
- right_supply_register (regcache, wordsize, regcache_tdep->ppc_mq_regnum,
- buf + wordsize * PPC_LINUX_PT_MQ);
- right_supply_register (regcache, wordsize, regcache_tdep->ppc_ps_regnum,
- buf + wordsize * PPC_LINUX_PT_MSR);
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ return &ppc32_be_linux_cvmxregset;
+ else
+ return &ppc32_le_linux_cvmxregset;
}
+/* Collect function used to generate the core note for the
+ checkpointed GPR regset. Here, we don't want to skip the
+ "checkpointed" NIP and MSR, so that the note section we generate is
+ similar to the one generated by the kernel. To avoid having to
+ define additional registers in GDB which are not actually
+ checkpointed in the architecture, we copy TFHAR to the checkpointed
+ NIP slot, which is what the kernel does, and copy the regular MSR
+ to the checkpointed MSR slot, which will have a similar value in
+ most cases. */
+
static void
-ppc32_linux_supply_gregset (const struct regset *regset,
- struct regcache *regcache,
- int regnum, const void *gregs, size_t size)
+ppc_linux_collect_core_cpgrregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *buf, size_t len)
{
- ppc_linux_supply_gregset (regcache, regnum, gregs, size, 4);
+ struct gdbarch *gdbarch = regcache->arch ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ const struct regset *cgprregset = ppc_linux_cgprregset (gdbarch);
+
+ /* We collect the checkpointed GPRs already defined in the regular
+ regmap, then overlay TFHAR/MSR on the checkpointed NIP/MSR
+ slots. */
+ cgprregset->collect_regset (cgprregset, regcache, regnum, buf, len);
+
+ /* Check that we are collecting all the registers, which should be
+ the case when generating a core file. */
+ if (regnum != -1)
+ return;
+
+ /* PT_NIP and PT_MSR are 32 and 33 for powerpc. Don't redefine
+ these symbols since this file can run on clients in other
+ architectures where they can already be defined to other
+ values. */
+ int pt_offset = 32;
+
+ /* Check that our buffer is long enough to hold two slots at
+ pt_offset * wordsize, one for NIP and one for MSR. */
+ gdb_assert ((pt_offset + 2) * tdep->wordsize <= len);
+
+ /* TFHAR is 8 bytes wide, but the NIP slot for a 32-bit thread is
+ 4-bytes long. We use raw_collect_integer which handles
+ differences in the sizes for the source and destination buffers
+ for both endian modes. */
+ (regcache->raw_collect_integer
+ (PPC_TFHAR_REGNUM, ((gdb_byte *) buf) + pt_offset * tdep->wordsize,
+ tdep->wordsize, false));
+
+ pt_offset = 33;
+
+ (regcache->raw_collect_integer
+ (PPC_MSR_REGNUM, ((gdb_byte *) buf) + pt_offset * tdep->wordsize,
+ tdep->wordsize, false));
}
-static struct regset ppc32_linux_gregset = {
- NULL, ppc32_linux_supply_gregset
-};
+/* Iterate over supported core file register note sections. */
-struct ppc_linux_sigtramp_cache
+static void
+ppc_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
{
- CORE_ADDR base;
- struct trad_frame_saved_reg *saved_regs;
-};
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int have_altivec = tdep->ppc_vr0_regnum != -1;
+ int have_vsx = tdep->ppc_vsr0_upper_regnum != -1;
+ int have_ppr = tdep->ppc_ppr_regnum != -1;
+ int have_dscr = tdep->ppc_dscr_regnum != -1;
+ int have_tar = tdep->ppc_tar_regnum != -1;
+
+ if (tdep->wordsize == 4)
+ cb (".reg", 48 * 4, 48 * 4, &ppc32_linux_gregset, NULL, cb_data);
+ else
+ cb (".reg", 48 * 8, 48 * 8, &ppc64_linux_gregset, NULL, cb_data);
+
+ cb (".reg2", 264, 264, &ppc32_linux_fpregset, NULL, cb_data);
+
+ if (have_altivec)
+ {
+ const struct regset *vrregset = ppc_linux_vrregset (gdbarch);
+ cb (".reg-ppc-vmx", PPC_LINUX_SIZEOF_VRREGSET, PPC_LINUX_SIZEOF_VRREGSET,
+ vrregset, "ppc Altivec", cb_data);
+ }
+
+ if (have_vsx)
+ cb (".reg-ppc-vsx", PPC_LINUX_SIZEOF_VSXREGSET, PPC_LINUX_SIZEOF_VSXREGSET,
+ &ppc32_linux_vsxregset, "POWER7 VSX", cb_data);
+
+ if (have_ppr)
+ cb (".reg-ppc-ppr", PPC_LINUX_SIZEOF_PPRREGSET,
+ PPC_LINUX_SIZEOF_PPRREGSET,
+ &ppc32_linux_pprregset, "Priority Program Register", cb_data);
+
+ if (have_dscr)
+ cb (".reg-ppc-dscr", PPC_LINUX_SIZEOF_DSCRREGSET,
+ PPC_LINUX_SIZEOF_DSCRREGSET,
+ &ppc32_linux_dscrregset, "Data Stream Control Register",
+ cb_data);
+
+ if (have_tar)
+ cb (".reg-ppc-tar", PPC_LINUX_SIZEOF_TARREGSET,
+ PPC_LINUX_SIZEOF_TARREGSET,
+ &ppc32_linux_tarregset, "Target Address Register", cb_data);
+
+ /* EBB registers are unavailable when ptrace returns ENODATA. Check
+ availability when generating a core file (regcache != NULL). */
+ if (tdep->have_ebb)
+ if (regcache == NULL
+ || REG_VALID == regcache->get_register_status (PPC_BESCR_REGNUM))
+ cb (".reg-ppc-ebb", PPC_LINUX_SIZEOF_EBBREGSET,
+ PPC_LINUX_SIZEOF_EBBREGSET,
+ &ppc32_linux_ebbregset, "Event-based Branching Registers",
+ cb_data);
+
+ if (tdep->ppc_mmcr0_regnum != -1)
+ cb (".reg-ppc-pmu", PPC_LINUX_SIZEOF_PMUREGSET,
+ PPC_LINUX_SIZEOF_PMUREGSET,
+ &ppc32_linux_pmuregset, "Performance Monitor Registers",
+ cb_data);
+
+ if (tdep->have_htm_spr)
+ cb (".reg-ppc-tm-spr", PPC_LINUX_SIZEOF_TM_SPRREGSET,
+ PPC_LINUX_SIZEOF_TM_SPRREGSET,
+ &ppc32_linux_tm_sprregset,
+ "Hardware Transactional Memory Special Purpose Registers",
+ cb_data);
+
+ /* Checkpointed registers can be unavailable, don't call back if
+ we are generating a core file. */
+
+ if (tdep->have_htm_core)
+ {
+ /* Only generate the checkpointed GPR core note if we also have
+ access to the HTM SPRs, because we need TFHAR to fill the
+ "checkpointed" NIP slot. We can read a core file without it
+ since GDB is not aware of this NIP as a visible register. */
+ if (regcache == NULL ||
+ (REG_VALID == regcache->get_register_status (PPC_CR0_REGNUM)
+ && tdep->have_htm_spr))
+ {
+ int cgpr_size = (tdep->wordsize == 4?
+ PPC32_LINUX_SIZEOF_CGPRREGSET
+ : PPC64_LINUX_SIZEOF_CGPRREGSET);
+
+ const struct regset *cgprregset =
+ ppc_linux_cgprregset (gdbarch);
+
+ if (regcache != NULL)
+ {
+ struct regset core_cgprregset = *cgprregset;
+
+ core_cgprregset.collect_regset
+ = ppc_linux_collect_core_cpgrregset;
+
+ cb (".reg-ppc-tm-cgpr",
+ cgpr_size, cgpr_size,
+ &core_cgprregset,
+ "Checkpointed General Purpose Registers", cb_data);
+ }
+ else
+ {
+ cb (".reg-ppc-tm-cgpr",
+ cgpr_size, cgpr_size,
+ cgprregset,
+ "Checkpointed General Purpose Registers", cb_data);
+ }
+ }
+ }
+
+ if (tdep->have_htm_fpu)
+ {
+ if (regcache == NULL ||
+ REG_VALID == regcache->get_register_status (PPC_CF0_REGNUM))
+ cb (".reg-ppc-tm-cfpr", PPC_LINUX_SIZEOF_CFPRREGSET,
+ PPC_LINUX_SIZEOF_CFPRREGSET,
+ &ppc32_linux_cfprregset,
+ "Checkpointed Floating Point Registers", cb_data);
+ }
+
+ if (tdep->have_htm_altivec)
+ {
+ if (regcache == NULL ||
+ REG_VALID == regcache->get_register_status (PPC_CVR0_REGNUM))
+ {
+ const struct regset *cvmxregset =
+ ppc_linux_cvmxregset (gdbarch);
+
+ cb (".reg-ppc-tm-cvmx", PPC_LINUX_SIZEOF_CVMXREGSET,
+ PPC_LINUX_SIZEOF_CVMXREGSET,
+ cvmxregset,
+ "Checkpointed Altivec (VMX) Registers", cb_data);
+ }
+ }
+
+ if (tdep->have_htm_vsx)
+ {
+ if (regcache == NULL ||
+ (REG_VALID
+ == regcache->get_register_status (PPC_CVSR0_UPPER_REGNUM)))
+ cb (".reg-ppc-tm-cvsx", PPC_LINUX_SIZEOF_CVSXREGSET,
+ PPC_LINUX_SIZEOF_CVSXREGSET,
+ &ppc32_linux_cvsxregset,
+ "Checkpointed VSX Registers", cb_data);
+ }
+
+ if (tdep->ppc_cppr_regnum != -1)
+ {
+ if (regcache == NULL ||
+ REG_VALID == regcache->get_register_status (PPC_CPPR_REGNUM))
+ cb (".reg-ppc-tm-cppr", PPC_LINUX_SIZEOF_CPPRREGSET,
+ PPC_LINUX_SIZEOF_CPPRREGSET,
+ &ppc32_linux_cpprregset,
+ "Checkpointed Priority Program Register", cb_data);
+ }
+
+ if (tdep->ppc_cdscr_regnum != -1)
+ {
+ if (regcache == NULL ||
+ REG_VALID == regcache->get_register_status (PPC_CDSCR_REGNUM))
+ cb (".reg-ppc-tm-cdscr", PPC_LINUX_SIZEOF_CDSCRREGSET,
+ PPC_LINUX_SIZEOF_CDSCRREGSET,
+ &ppc32_linux_cdscrregset,
+ "Checkpointed Data Stream Control Register", cb_data);
+ }
-static struct ppc_linux_sigtramp_cache *
-ppc_linux_sigtramp_cache (struct frame_info *next_frame, void **this_cache)
+ if (tdep->ppc_ctar_regnum)
+ {
+ if ( regcache == NULL ||
+ REG_VALID == regcache->get_register_status (PPC_CTAR_REGNUM))
+ cb (".reg-ppc-tm-ctar", PPC_LINUX_SIZEOF_CTARREGSET,
+ PPC_LINUX_SIZEOF_CTARREGSET,
+ &ppc32_linux_ctarregset,
+ "Checkpointed Target Address Register", cb_data);
+ }
+}
+
+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 ppc_linux_sigtramp_cache *cache;
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- if ((*this_cache) != NULL)
- return (*this_cache);
- cache = FRAME_OBSTACK_ZALLOC (struct ppc_linux_sigtramp_cache);
- (*this_cache) = cache;
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
-
- cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
-
- /* Find the register pointer, which gives the address of the
- register buffers. */
- if (tdep->wordsize == 4)
- regs = (cache->base
- + 0xd0 /* Offset to ucontext_t. */
- + 0x30 /* Offset to .reg. */);
- else
- regs = (cache->base
- + 0x80 /* Offset to ucontext_t. */
- + 0xe0 /* Offset to .reg. */);
- /* And the corresponding register buffers. */
- gpregs = read_memory_unsigned_integer (regs, tdep->wordsize);
+ 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 < ppc_num_gprs; i++)
+ for (i = 0; i < 32; i++)
{
int regnum = i + tdep->ppc_gp0_regnum;
- cache->saved_regs[regnum].addr = gpregs + i * tdep->wordsize;
+ 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);
}
- cache->saved_regs[PC_REGNUM].addr = gpregs + 32 * tdep->wordsize;
- cache->saved_regs[tdep->ppc_ctr_regnum].addr = gpregs + 35 * tdep->wordsize;
- cache->saved_regs[tdep->ppc_lr_regnum].addr = gpregs + 36 * tdep->wordsize;
- cache->saved_regs[tdep->ppc_xer_regnum].addr = gpregs + 37 * tdep->wordsize;
- cache->saved_regs[tdep->ppc_cr_regnum].addr = gpregs + 38 * tdep->wordsize;
- /* Floating point registers. */
if (ppc_floating_point_unit_p (gdbarch))
{
- for (i = 0; i < ppc_num_fprs; i++)
- {
- int regnum = i + tdep->ppc_fp0_regnum;
- cache->saved_regs[regnum].addr = fpregs + i * tdep->wordsize;
- }
- cache->saved_regs[tdep->ppc_fpscr_regnum].addr
- = fpregs + 32 * tdep->wordsize;
+ /* 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));
+}
- return cache;
+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
-ppc_linux_sigtramp_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
+ppc64_linux_sigaction_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
{
- struct ppc_linux_sigtramp_cache *info
- = ppc_linux_sigtramp_cache (next_frame, this_cache);
- (*this_id) = frame_id_build (info->base, frame_pc_unwind (next_frame));
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0x80 /* Offset to ucontext_t. */
+ + 0xe0 /* Offset to .reg. */,
+ 128);
}
static void
-ppc_linux_sigtramp_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ppc32_linux_sighandler_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
{
- struct ppc_linux_sigtramp_cache *info
- = ppc_linux_sigtramp_cache (next_frame, this_cache);
- trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
+ 0x40 /* Offset to ucontext_t. */
+ + 0x1c /* Offset to .reg. */,
+ 0);
}
-static const struct frame_unwind ppc_linux_sigtramp_unwind =
+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,
- ppc_linux_sigtramp_this_id,
- ppc_linux_sigtramp_prev_register
+ 4,
+ {
+ { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */
+ { 0x44000002, ULONGEST_MAX }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sigaction_cache_init
};
+static struct tramp_frame ppc64_linux_sigaction_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */
+ { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */
+ { 0x44000002, ULONGEST_MAX }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sigaction_cache_init
+};
+static struct tramp_frame ppc32_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38000077, ULONGEST_MAX }, /* li r0,119 */
+ { 0x44000002, ULONGEST_MAX }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sighandler_cache_init
+};
+static struct tramp_frame ppc64_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */
+ { 0x38000077, ULONGEST_MAX }, /* li r0,119 */
+ { 0x44000002, ULONGEST_MAX }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sighandler_cache_init
+};
+
+/* Return 1 if PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM are usable. */
+int
+ppc_linux_trap_reg_p (struct gdbarch *gdbarch)
+{
+ /* 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;
-static const struct frame_unwind *
-ppc_linux_sigtramp_sniffer (struct frame_info *next_frame)
+ /* 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,
+ thread_info *thread)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (next_frame));
- if (frame_pc_unwind (next_frame)
- > frame_unwind_register_unsigned (next_frame, SP_REGNUM))
- /* Assume anything that is vaguely on the stack is a signal
- trampoline. */
- return &ppc_linux_sigtramp_unwind;
+ struct regcache *regcache = get_thread_regcache (thread);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ /* Make sure we're in a 32- or 64-bit machine */
+ gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8);
+
+ /* The content of a register */
+ gdb::byte_vector buf (tdep->wordsize);
+
+ /* Getting the system call number from the register.
+ When dealing with PowerPC architecture, this information
+ is stored at 0th register. */
+ regcache->cooked_read (tdep->ppc_gp0_regnum, buf.data ());
+
+ return extract_signed_integer (buf.data (), tdep->wordsize, byte_order);
+}
+
+/* PPC process record-replay */
+
+static struct linux_record_tdep ppc_linux_record_tdep;
+static struct linux_record_tdep ppc64_linux_record_tdep;
+
+/* ppc_canonicalize_syscall maps from the native PowerPC Linux set of
+ syscall ids into a canonical set of syscall ids used by process
+ record. (See arch/powerpc/include/uapi/asm/unistd.h in kernel tree.)
+ Return -1 if this system call is not supported by process record.
+ Otherwise, return the syscall number for process record of given
+ SYSCALL. */
+
+static enum gdb_syscall
+ppc_canonicalize_syscall (int syscall)
+{
+ int result = -1;
+
+ if (syscall <= 165)
+ result = syscall;
+ else if (syscall >= 167 && syscall <= 190) /* Skip query_module 166 */
+ result = syscall + 1;
+ else if (syscall >= 192 && syscall <= 197) /* mmap2 */
+ result = syscall;
+ else if (syscall == 208) /* tkill */
+ result = gdb_sys_tkill;
+ else if (syscall >= 207 && syscall <= 220) /* gettid */
+ result = syscall + 224 - 207;
+ else if (syscall >= 234 && syscall <= 239) /* exit_group */
+ result = syscall + 252 - 234;
+ else if (syscall >= 240 && syscall <= 248) /* timer_create */
+ result = syscall += 259 - 240;
+ else if (syscall >= 250 && syscall <= 251) /* tgkill */
+ result = syscall + 270 - 250;
+ else if (syscall == 336)
+ result = gdb_sys_recv;
+ else if (syscall == 337)
+ result = gdb_sys_recvfrom;
+ else if (syscall == 342)
+ result = gdb_sys_recvmsg;
+
+ return (enum gdb_syscall) result;
+}
+
+/* Record registers which might be clobbered during system call.
+ Return 0 if successful. */
+
+static int
+ppc_linux_syscall_record (struct regcache *regcache)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ ULONGEST scnum;
+ enum gdb_syscall syscall_gdb;
+ int ret;
+
+ regcache_raw_read_unsigned (regcache, tdep->ppc_gp0_regnum, &scnum);
+ syscall_gdb = ppc_canonicalize_syscall (scnum);
+
+ if (syscall_gdb < 0)
+ {
+ printf_unfiltered (_("Process record and replay target doesn't "
+ "support syscall number %d\n"), (int) scnum);
+ return 0;
+ }
+
+ if (syscall_gdb == gdb_sys_sigreturn
+ || syscall_gdb == gdb_sys_rt_sigreturn)
+ {
+ int i, j;
+ int regsets[] = { tdep->ppc_gp0_regnum,
+ tdep->ppc_fp0_regnum,
+ tdep->ppc_vr0_regnum,
+ tdep->ppc_vsr0_upper_regnum };
+
+ for (j = 0; j < 4; j++)
+ {
+ if (regsets[j] == -1)
+ continue;
+ for (i = 0; i < 32; i++)
+ {
+ if (record_full_arch_list_add_reg (regcache, regsets[j] + i))
+ return -1;
+ }
+ }
+
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_xer_regnum))
+ return -1;
+
+ return 0;
+ }
+
+ if (tdep->wordsize == 8)
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &ppc64_linux_record_tdep);
else
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &ppc_linux_record_tdep);
+
+ if (ret != 0)
+ return ret;
+
+ /* Record registers clobbered during syscall. */
+ for (int i = 3; i <= 12; i++)
+ {
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i))
+ return -1;
+ }
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + 0))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum))
+ return -1;
+
+ return 0;
+}
+
+/* Record registers which might be clobbered during signal handling.
+ Return 0 if successful. */
+
+static int
+ppc_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache,
+ enum gdb_signal signal)
+{
+ /* See handle_rt_signal64 in arch/powerpc/kernel/signal_64.c
+ handle_rt_signal32 in arch/powerpc/kernel/signal_32.c
+ arch/powerpc/include/asm/ptrace.h
+ for details. */
+ const int SIGNAL_FRAMESIZE = 128;
+ const int sizeof_rt_sigframe = 1440 * 2 + 8 * 2 + 4 * 6 + 8 + 8 + 128 + 512;
+ ULONGEST sp;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i;
+
+ for (i = 3; i <= 12; i++)
+ {
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i))
+ return -1;
+ }
+
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, gdbarch_pc_regnum (gdbarch)))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, gdbarch_sp_regnum (gdbarch)))
+ return -1;
+
+ /* Record the change in the stack.
+ frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */
+ regcache_raw_read_unsigned (regcache, gdbarch_sp_regnum (gdbarch), &sp);
+ sp -= SIGNAL_FRAMESIZE;
+ sp -= sizeof_rt_sigframe;
+
+ if (record_full_arch_list_add_mem (sp, SIGNAL_FRAMESIZE + sizeof_rt_sigframe))
+ return -1;
+
+ if (record_full_arch_list_add_end ())
+ return -1;
+
+ return 0;
+}
+
+static void
+ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+
+ regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), pc);
+
+ /* 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.
+
+ 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);
+}
+
+static const struct target_desc *
+ppc_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
+{
+ struct ppc_linux_features features = ppc_linux_no_features;
+ 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");
+ asection *ppr = bfd_get_section_by_name (abfd, ".reg-ppc-ppr");
+ asection *dscr = bfd_get_section_by_name (abfd, ".reg-ppc-dscr");
+ asection *tar = bfd_get_section_by_name (abfd, ".reg-ppc-tar");
+ asection *pmu = bfd_get_section_by_name (abfd, ".reg-ppc-pmu");
+ asection *htmspr = bfd_get_section_by_name (abfd, ".reg-ppc-tm-spr");
+
+ if (! section)
return NULL;
+
+ switch (bfd_section_size (section))
+ {
+ case 48 * 4:
+ features.wordsize = 4;
+ break;
+ case 48 * 8:
+ features.wordsize = 8;
+ break;
+ default:
+ return NULL;
+ }
+
+ if (altivec)
+ features.altivec = true;
+
+ if (vsx)
+ features.vsx = true;
+
+ CORE_ADDR hwcap = linux_get_hwcap (target);
+
+ features.isa205 = ppc_linux_has_isa205 (hwcap);
+
+ if (ppr && dscr)
+ {
+ features.ppr_dscr = true;
+
+ /* We don't require the EBB note section to be present in the
+ core file to select isa207 because these registers could have
+ been unavailable when the core file was created. They will
+ be in the tdep but will show as unavailable. */
+ if (tar && pmu)
+ {
+ features.isa207 = true;
+ if (htmspr)
+ features.htm = true;
+ }
+ }
+
+ return ppc_linux_match_description (features);
}
+
+/* Implementation of `gdbarch_elf_make_msymbol_special', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
+
static void
-ppc64_linux_supply_gregset (const struct regset *regset,
- struct regcache * regcache,
- int regnum, const void *gregs, size_t size)
+ppc_elfv2_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
- ppc_linux_supply_gregset (regcache, regnum, gregs, size, 8);
+ 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))
+ {
+ default:
+ break;
+ case 8:
+ MSYMBOL_TARGET_FLAG_1 (msym) = 1;
+ break;
+ }
}
-static struct regset ppc64_linux_gregset = {
- NULL, ppc64_linux_supply_gregset
-};
+/* Implementation of `gdbarch_skip_entrypoint', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
-void
-ppc_linux_supply_fpregset (const struct regset *regset,
- struct regcache * regcache,
- int regnum, const void *fpset, size_t size)
+static CORE_ADDR
+ppc_elfv2_skip_entrypoint (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- int regi;
- struct gdbarch *regcache_arch = get_regcache_arch (regcache);
- struct gdbarch_tdep *regcache_tdep = gdbarch_tdep (regcache_arch);
- const bfd_byte *buf = fpset;
+ struct bound_minimal_symbol fun;
+ int local_entry_offset = 0;
+
+ fun = lookup_minimal_symbol_by_pc (pc);
+ if (fun.minsym == NULL)
+ return pc;
+
+ /* 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 (BMSYMBOL_VALUE_ADDRESS (fun) <= pc
+ && pc < BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset)
+ return BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset;
+
+ return pc;
+}
+
+/* Implementation of `gdbarch_stap_is_single_operand', as defined in
+ gdbarch.h. */
- if (! ppc_floating_point_unit_p (regcache_arch))
+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. */
+}
+
+/* Implementation of `gdbarch_stap_parse_special_token', as defined in
+ gdbarch.h. */
+
+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;
+ }
+
+ len = s - p->arg;
+ regname = (char *) alloca (len + 2);
+ regname[0] = 'r';
+
+ strncpy (regname + 1, p->arg, len);
+ ++len;
+ regname[len] = '\0';
+
+ 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 (&p->pstate, OP_REGISTER);
+ str.ptr = regname;
+ str.length = len;
+ write_exp_string (&p->pstate, str);
+ write_exp_elt_opcode (&p->pstate, OP_REGISTER);
+
+ p->arg = s;
+ }
+ else
+ {
+ /* All the other tokens should be handled correctly by the generic
+ parser. */
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Initialize linux_record_tdep if not initialized yet.
+ WORDSIZE is 4 or 8 for 32- or 64-bit PowerPC Linux respectively.
+ Sizes of data structures are initialized accordingly. */
+
+static void
+ppc_init_linux_record_tdep (struct linux_record_tdep *record_tdep,
+ int wordsize)
+{
+ /* Simply return if it had been initialized. */
+ if (record_tdep->size_pointer != 0)
return;
- for (regi = 0; regi < ppc_num_fprs; regi++)
- regcache_raw_supply (regcache,
- regcache_tdep->ppc_fp0_regnum + regi,
- buf + 8 * regi);
+ /* These values are the size of the type that will be used in a system
+ call. They are obtained from Linux Kernel source. */
- /* The FPSCR is stored in the low order word of the last
- doubleword in the fpregset. */
- regcache_raw_supply (regcache, regcache_tdep->ppc_fpscr_regnum,
- buf + 8 * 32 + 4);
+ if (wordsize == 8)
+ {
+ record_tdep->size_pointer = 8;
+ record_tdep->size__old_kernel_stat = 32;
+ record_tdep->size_tms = 32;
+ record_tdep->size_loff_t = 8;
+ record_tdep->size_flock = 32;
+ record_tdep->size_oldold_utsname = 45;
+ record_tdep->size_ustat = 32;
+ record_tdep->size_old_sigaction = 32;
+ record_tdep->size_old_sigset_t = 8;
+ record_tdep->size_rlimit = 16;
+ record_tdep->size_rusage = 144;
+ record_tdep->size_timeval = 16;
+ record_tdep->size_timezone = 8;
+ record_tdep->size_old_gid_t = 4;
+ record_tdep->size_old_uid_t = 4;
+ record_tdep->size_fd_set = 128;
+ record_tdep->size_old_dirent = 280;
+ record_tdep->size_statfs = 120;
+ record_tdep->size_statfs64 = 120;
+ record_tdep->size_sockaddr = 16;
+ record_tdep->size_int = 4;
+ record_tdep->size_long = 8;
+ record_tdep->size_ulong = 8;
+ record_tdep->size_msghdr = 56;
+ record_tdep->size_itimerval = 32;
+ record_tdep->size_stat = 144;
+ record_tdep->size_old_utsname = 325;
+ record_tdep->size_sysinfo = 112;
+ record_tdep->size_msqid_ds = 120;
+ record_tdep->size_shmid_ds = 112;
+ record_tdep->size_new_utsname = 390;
+ record_tdep->size_timex = 208;
+ record_tdep->size_mem_dqinfo = 24;
+ record_tdep->size_if_dqblk = 72;
+ record_tdep->size_fs_quota_stat = 80;
+ record_tdep->size_timespec = 16;
+ record_tdep->size_pollfd = 8;
+ record_tdep->size_NFS_FHSIZE = 32;
+ record_tdep->size_knfsd_fh = 132;
+ record_tdep->size_TASK_COMM_LEN = 16;
+ record_tdep->size_sigaction = 32;
+ record_tdep->size_sigset_t = 8;
+ record_tdep->size_siginfo_t = 128;
+ record_tdep->size_cap_user_data_t = 8;
+ record_tdep->size_stack_t = 24;
+ record_tdep->size_off_t = 8;
+ record_tdep->size_stat64 = 104;
+ record_tdep->size_gid_t = 4;
+ record_tdep->size_uid_t = 4;
+ record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */
+ record_tdep->size_flock64 = 32;
+ record_tdep->size_io_event = 32;
+ record_tdep->size_iocb = 64;
+ record_tdep->size_epoll_event = 16;
+ record_tdep->size_itimerspec = 32;
+ record_tdep->size_mq_attr = 64;
+ record_tdep->size_termios = 44;
+ record_tdep->size_pid_t = 4;
+ record_tdep->size_winsize = 8;
+ record_tdep->size_serial_struct = 72;
+ record_tdep->size_serial_icounter_struct = 80;
+ record_tdep->size_size_t = 8;
+ record_tdep->size_iovec = 16;
+ record_tdep->size_time_t = 8;
+ }
+ else if (wordsize == 4)
+ {
+ record_tdep->size_pointer = 4;
+ record_tdep->size__old_kernel_stat = 32;
+ record_tdep->size_tms = 16;
+ record_tdep->size_loff_t = 8;
+ record_tdep->size_flock = 16;
+ record_tdep->size_oldold_utsname = 45;
+ record_tdep->size_ustat = 20;
+ record_tdep->size_old_sigaction = 16;
+ record_tdep->size_old_sigset_t = 4;
+ record_tdep->size_rlimit = 8;
+ record_tdep->size_rusage = 72;
+ record_tdep->size_timeval = 8;
+ record_tdep->size_timezone = 8;
+ record_tdep->size_old_gid_t = 4;
+ record_tdep->size_old_uid_t = 4;
+ record_tdep->size_fd_set = 128;
+ record_tdep->size_old_dirent = 268;
+ record_tdep->size_statfs = 64;
+ record_tdep->size_statfs64 = 88;
+ record_tdep->size_sockaddr = 16;
+ record_tdep->size_int = 4;
+ record_tdep->size_long = 4;
+ record_tdep->size_ulong = 4;
+ record_tdep->size_msghdr = 28;
+ record_tdep->size_itimerval = 16;
+ record_tdep->size_stat = 88;
+ record_tdep->size_old_utsname = 325;
+ record_tdep->size_sysinfo = 64;
+ record_tdep->size_msqid_ds = 68;
+ record_tdep->size_shmid_ds = 60;
+ record_tdep->size_new_utsname = 390;
+ record_tdep->size_timex = 128;
+ record_tdep->size_mem_dqinfo = 24;
+ record_tdep->size_if_dqblk = 72;
+ record_tdep->size_fs_quota_stat = 80;
+ record_tdep->size_timespec = 8;
+ record_tdep->size_pollfd = 8;
+ record_tdep->size_NFS_FHSIZE = 32;
+ record_tdep->size_knfsd_fh = 132;
+ record_tdep->size_TASK_COMM_LEN = 16;
+ record_tdep->size_sigaction = 20;
+ record_tdep->size_sigset_t = 8;
+ record_tdep->size_siginfo_t = 128;
+ record_tdep->size_cap_user_data_t = 4;
+ record_tdep->size_stack_t = 12;
+ record_tdep->size_off_t = 4;
+ record_tdep->size_stat64 = 104;
+ record_tdep->size_gid_t = 4;
+ record_tdep->size_uid_t = 4;
+ record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */
+ record_tdep->size_flock64 = 32;
+ record_tdep->size_io_event = 32;
+ record_tdep->size_iocb = 64;
+ record_tdep->size_epoll_event = 16;
+ record_tdep->size_itimerspec = 16;
+ record_tdep->size_mq_attr = 32;
+ record_tdep->size_termios = 44;
+ record_tdep->size_pid_t = 4;
+ record_tdep->size_winsize = 8;
+ record_tdep->size_serial_struct = 60;
+ record_tdep->size_serial_icounter_struct = 80;
+ record_tdep->size_size_t = 4;
+ record_tdep->size_iovec = 8;
+ record_tdep->size_time_t = 4;
+ }
+ else
+ internal_error (__FILE__, __LINE__, _("unexpected wordsize"));
+
+ /* These values are the second argument of system call "sys_fcntl"
+ and "sys_fcntl64". They are obtained from Linux Kernel source. */
+ record_tdep->fcntl_F_GETLK = 5;
+ record_tdep->fcntl_F_GETLK64 = 12;
+ record_tdep->fcntl_F_SETLK64 = 13;
+ record_tdep->fcntl_F_SETLKW64 = 14;
+
+ record_tdep->arg1 = PPC_R0_REGNUM + 3;
+ record_tdep->arg2 = PPC_R0_REGNUM + 4;
+ record_tdep->arg3 = PPC_R0_REGNUM + 5;
+ record_tdep->arg4 = PPC_R0_REGNUM + 6;
+ record_tdep->arg5 = PPC_R0_REGNUM + 7;
+ record_tdep->arg6 = PPC_R0_REGNUM + 8;
+
+ /* These values are the second argument of system call "sys_ioctl".
+ They are obtained from Linux Kernel source.
+ See arch/powerpc/include/uapi/asm/ioctls.h. */
+ record_tdep->ioctl_TCGETS = 0x403c7413;
+ record_tdep->ioctl_TCSETS = 0x803c7414;
+ record_tdep->ioctl_TCSETSW = 0x803c7415;
+ record_tdep->ioctl_TCSETSF = 0x803c7416;
+ record_tdep->ioctl_TCGETA = 0x40147417;
+ record_tdep->ioctl_TCSETA = 0x80147418;
+ record_tdep->ioctl_TCSETAW = 0x80147419;
+ record_tdep->ioctl_TCSETAF = 0x8014741c;
+ record_tdep->ioctl_TCSBRK = 0x2000741d;
+ record_tdep->ioctl_TCXONC = 0x2000741e;
+ record_tdep->ioctl_TCFLSH = 0x2000741f;
+ record_tdep->ioctl_TIOCEXCL = 0x540c;
+ record_tdep->ioctl_TIOCNXCL = 0x540d;
+ record_tdep->ioctl_TIOCSCTTY = 0x540e;
+ record_tdep->ioctl_TIOCGPGRP = 0x40047477;
+ record_tdep->ioctl_TIOCSPGRP = 0x80047476;
+ record_tdep->ioctl_TIOCOUTQ = 0x40047473;
+ record_tdep->ioctl_TIOCSTI = 0x5412;
+ record_tdep->ioctl_TIOCGWINSZ = 0x40087468;
+ record_tdep->ioctl_TIOCSWINSZ = 0x80087467;
+ record_tdep->ioctl_TIOCMGET = 0x5415;
+ record_tdep->ioctl_TIOCMBIS = 0x5416;
+ record_tdep->ioctl_TIOCMBIC = 0x5417;
+ record_tdep->ioctl_TIOCMSET = 0x5418;
+ record_tdep->ioctl_TIOCGSOFTCAR = 0x5419;
+ record_tdep->ioctl_TIOCSSOFTCAR = 0x541a;
+ record_tdep->ioctl_FIONREAD = 0x4004667f;
+ record_tdep->ioctl_TIOCINQ = 0x4004667f;
+ record_tdep->ioctl_TIOCLINUX = 0x541c;
+ record_tdep->ioctl_TIOCCONS = 0x541d;
+ record_tdep->ioctl_TIOCGSERIAL = 0x541e;
+ record_tdep->ioctl_TIOCSSERIAL = 0x541f;
+ record_tdep->ioctl_TIOCPKT = 0x5420;
+ record_tdep->ioctl_FIONBIO = 0x8004667e;
+ record_tdep->ioctl_TIOCNOTTY = 0x5422;
+ record_tdep->ioctl_TIOCSETD = 0x5423;
+ record_tdep->ioctl_TIOCGETD = 0x5424;
+ record_tdep->ioctl_TCSBRKP = 0x5425;
+ record_tdep->ioctl_TIOCSBRK = 0x5427;
+ record_tdep->ioctl_TIOCCBRK = 0x5428;
+ record_tdep->ioctl_TIOCGSID = 0x5429;
+ record_tdep->ioctl_TIOCGPTN = 0x40045430;
+ record_tdep->ioctl_TIOCSPTLCK = 0x80045431;
+ record_tdep->ioctl_FIONCLEX = 0x20006602;
+ record_tdep->ioctl_FIOCLEX = 0x20006601;
+ record_tdep->ioctl_FIOASYNC = 0x8004667d;
+ record_tdep->ioctl_TIOCSERCONFIG = 0x5453;
+ record_tdep->ioctl_TIOCSERGWILD = 0x5454;
+ record_tdep->ioctl_TIOCSERSWILD = 0x5455;
+ record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456;
+ record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457;
+ record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458;
+ record_tdep->ioctl_TIOCSERGETLSR = 0x5459;
+ record_tdep->ioctl_TIOCSERGETMULTI = 0x545a;
+ record_tdep->ioctl_TIOCSERSETMULTI = 0x545b;
+ record_tdep->ioctl_TIOCMIWAIT = 0x545c;
+ record_tdep->ioctl_TIOCGICOUNT = 0x545d;
+ record_tdep->ioctl_FIOQSIZE = 0x40086680;
}
-static struct regset ppc_linux_fpregset = { NULL, ppc_linux_supply_fpregset };
+/* Return a floating-point format for a floating-point variable of
+ length LEN in bits. If non-NULL, NAME is the name of its type.
+ If no suitable type is found, return NULL. */
-static const struct regset *
-ppc_linux_regset_from_core_section (struct gdbarch *core_arch,
- const char *sect_name, size_t sect_size)
+static const struct floatformat **
+ppc_floatformat_for_type (struct gdbarch *gdbarch,
+ const char *name, int len)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
- if (strcmp (sect_name, ".reg") == 0)
+ if (len == 128 && name)
{
- if (tdep->wordsize == 4)
- return &ppc32_linux_gregset;
- else
- return &ppc64_linux_gregset;
+ if (strcmp (name, "__float128") == 0
+ || strcmp (name, "_Float128") == 0
+ || strcmp (name, "_Float64x") == 0
+ || strcmp (name, "complex _Float128") == 0
+ || strcmp (name, "complex _Float64x") == 0)
+ return floatformats_ia64_quad;
+
+ if (strcmp (name, "__ibm128") == 0)
+ return floatformats_ibm_long_double;
}
- if (strcmp (sect_name, ".reg2") == 0)
- return &ppc_linux_fpregset;
- return NULL;
+
+ return default_floatformat_for_type (gdbarch, name, len);
}
static void
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ struct tdesc_arch_data *tdesc_data = info.tdesc_data;
+ 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 can be either IBM long double or IEEE quad long double.
+ The 64-bit long double case will be detected automatically using
+ the size specified in debug info. We use a .gnu.attribute flag
+ to distinguish between the IBM long double and IEEE quad cases. */
+ set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
+ if (tdep->long_double_abi == POWERPC_LONG_DOUBLE_IEEE128)
+ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+ else
+ set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double);
+
+ /* Support for floating-point data type variants. */
+ set_gdbarch_floatformat_for_type (gdbarch, ppc_floatformat_for_type);
+
+ /* 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)
{
- /* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
- Supplement says that long doubles are sixteen bytes long.
- However, as one of the known warts of its ABI, PPC GNU/Linux
- uses eight-byte long doubles. GCC only recently got 128-bit
- long double support on PPC, so it may be changing soon. The
- Linux[sic] Standards Base says that programs that use 'long
- double' on PPC GNU/Linux are non-conformant. */
- set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
-
/* 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 the AIX/PowerOpen ABI - everything returned in memory
+ 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. */
ppc_linux_memory_remove_breakpoint);
/* Shared library handling. */
- set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
- set_gdbarch_skip_trampoline_code (gdbarch,
- ppc_linux_skip_trampoline_code);
+ set_gdbarch_skip_trampoline_code (gdbarch, ppc_skip_trampoline_code);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, ppc_linux_svr4_fetch_link_map_offsets);
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ /* Setting the correct XML syscall filename. */
+ set_xml_syscall_file_name (gdbarch, 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");
+
+ if (powerpc_so_ops.in_dynsym_resolve_code == NULL)
+ {
+ powerpc_so_ops = svr4_so_ops;
+ /* Override dynamic resolve function. */
+ powerpc_so_ops.in_dynsym_resolve_code =
+ powerpc_linux_in_dynsym_resolve_code;
+ }
+ set_solib_ops (gdbarch, &powerpc_so_ops);
+
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
}
if (tdep->wordsize == 8)
{
- /* Handle PPC64 GNU/Linux function pointers (which are really
- function descriptors). */
- set_gdbarch_convert_from_func_ptr_addr
- (gdbarch, ppc64_linux_convert_from_func_ptr_addr);
+ if (tdep->elf_abi == POWERPC_ELF_V1)
+ {
+ /* 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
+ {
+ set_gdbarch_elf_make_msymbol_special
+ (gdbarch, ppc_elfv2_elf_make_msymbol_special);
+
+ set_gdbarch_skip_entrypoint (gdbarch, ppc_elfv2_skip_entrypoint);
+ }
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, ppc64_in_solib_call_trampoline);
+ /* 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);
+
+ /* Setting the correct XML syscall filename. */
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC64);
- /* PPC64 malloc's entry-point is called ".malloc". */
- set_gdbarch_name_of_malloc (gdbarch, ".malloc");
+ /* Trampolines. */
+ tramp_frame_prepend_unwinder (gdbarch,
+ &ppc64_linux_sigaction_tramp_frame);
+ tramp_frame_prepend_unwinder (gdbarch,
+ &ppc64_linux_sighandler_tramp_frame);
+
+ /* 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");
}
- set_gdbarch_regset_from_core_section (gdbarch, ppc_linux_regset_from_core_section);
- frame_unwind_append_sniffer (gdbarch, ppc_linux_sigtramp_sniffer);
+
+ set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description);
+ set_gdbarch_iterate_over_regset_sections (gdbarch,
+ ppc_linux_iterate_over_regset_sections);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ 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)
+ {
+ tdesc_numbered_register (feature, tdesc_data,
+ PPC_ORIG_R3_REGNUM, "orig_r3");
+ tdesc_numbered_register (feature, tdesc_data,
+ PPC_TRAP_REGNUM, "trap");
+ }
+ }
+
+ set_gdbarch_displaced_step_location (gdbarch,
+ linux_displaced_step_location);
+
+ /* Support reverse debugging. */
+ set_gdbarch_process_record (gdbarch, ppc_process_record);
+ set_gdbarch_process_record_signal (gdbarch, ppc_linux_record_signal);
+ tdep->ppc_syscall_record = ppc_linux_syscall_record;
+
+ ppc_init_linux_record_tdep (&ppc_linux_record_tdep, 4);
+ ppc_init_linux_record_tdep (&ppc64_linux_record_tdep, 8);
}
void
_initialize_ppc_linux_tdep (void)
{
- /* Register for all sub-familes of the POWER/PowerPC: 32-bit and
+ /* Register for all sub-families 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);
ppc_linux_init_abi);
gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
ppc_linux_init_abi);
+
+ /* Initialize the Linux target descriptions. */
+ initialize_tdesc_powerpc_32l ();
+ initialize_tdesc_powerpc_altivec32l ();
+ initialize_tdesc_powerpc_vsx32l ();
+ initialize_tdesc_powerpc_isa205_32l ();
+ initialize_tdesc_powerpc_isa205_altivec32l ();
+ initialize_tdesc_powerpc_isa205_vsx32l ();
+ initialize_tdesc_powerpc_isa205_ppr_dscr_vsx32l ();
+ initialize_tdesc_powerpc_isa207_vsx32l ();
+ initialize_tdesc_powerpc_isa207_htm_vsx32l ();
+ initialize_tdesc_powerpc_64l ();
+ initialize_tdesc_powerpc_altivec64l ();
+ initialize_tdesc_powerpc_vsx64l ();
+ initialize_tdesc_powerpc_isa205_64l ();
+ initialize_tdesc_powerpc_isa205_altivec64l ();
+ initialize_tdesc_powerpc_isa205_vsx64l ();
+ initialize_tdesc_powerpc_isa205_ppr_dscr_vsx64l ();
+ initialize_tdesc_powerpc_isa207_vsx64l ();
+ initialize_tdesc_powerpc_isa207_htm_vsx64l ();
+ initialize_tdesc_powerpc_e500l ();
}
projects / deliverable / binutils-gdb.git / blobdiff