/* Target-dependent code for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "regset.h"
#include "solib-svr4.h"
+#include "solib-spu.h"
+#include "solib.h"
+#include "solist.h"
#include "ppc-tdep.h"
+#include "ppc64-tdep.h"
+#include "ppc-linux-tdep.h"
+#include "glibc-tdep.h"
#include "trad-frame.h"
#include "frame-unwind.h"
#include "tramp-frame.h"
-
-static CORE_ADDR
-ppc_linux_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
-{
- gdb_byte 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, (gdb_byte *) 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 "observer.h"
+#include "auxv.h"
+#include "elf/common.h"
+#include "elf/ppc64.h"
+#include "arch-utils.h"
+#include "spu-tdep.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" /* for elfcore_write_* */
+
+#include "features/rs6000/powerpc-32l.c"
+#include "features/rs6000/powerpc-altivec32l.c"
+#include "features/rs6000/powerpc-cell32l.c"
+#include "features/rs6000/powerpc-vsx32l.c"
+#include "features/rs6000/powerpc-isa205-32l.c"
+#include "features/rs6000/powerpc-isa205-altivec32l.c"
+#include "features/rs6000/powerpc-isa205-vsx32l.c"
+#include "features/rs6000/powerpc-64l.c"
+#include "features/rs6000/powerpc-altivec64l.c"
+#include "features/rs6000/powerpc-cell64l.c"
+#include "features/rs6000/powerpc-vsx64l.c"
+#include "features/rs6000/powerpc-isa205-64l.c"
+#include "features/rs6000/powerpc-isa205-altivec64l.c"
+#include "features/rs6000/powerpc-isa205-vsx64l.c"
+#include "features/rs6000/powerpc-e500l.c"
+
+/* Shared library operations for PowerPC-Linux. */
+static struct target_so_ops powerpc_so_ops;
+
+/* The syscall's XML filename for PPC and PPC64. */
+#define XML_SYSCALL_FILENAME_PPC "syscalls/ppc-linux.xml"
+#define XML_SYSCALL_FILENAME_PPC64 "syscalls/ppc64-linux.xml"
/* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint
in much the same fashion as memory_remove_breakpoint in mem-break.c,
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 (struct bp_target_info *bp_tgt)
+static int
+ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
- CORE_ADDR addr = bp_tgt->placed_address;
+ CORE_ADDR addr = bp_tgt->reqstd_address;
const unsigned char *bp;
int val;
int bplen;
gdb_byte old_contents[BREAKPOINT_MAX];
+ struct cleanup *cleanup;
/* Determine appropriate breakpoint contents and size for this address. */
- bp = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &bplen);
+ bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
if (bp == NULL)
error (_("Software breakpoints not implemented for this target."));
+ /* Make sure we see the memory breakpoints. */
+ cleanup = make_show_memory_breakpoints_cleanup (1);
val = target_read_memory (addr, old_contents, bplen);
/* If our breakpoint is no longer at the address, this means that the
program modified the code on us, so it is wrong to put back the
- old value */
+ old value. */
if (val == 0 && memcmp (bp, old_contents, bplen) == 0)
- val = target_write_memory (addr, bp_tgt->shadow_contents, bplen);
+ val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen);
+ do_cleanups (cleanup);
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, gdb_byte *readbuf,
- const gdb_byte *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);
}
-/* 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)
-{
- unsigned char buf[4];
-
- read_memory (pc, buf, 4);
- return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-}
+/* PLT stub in executable. */
+static struct ppc_insn_pattern powerpc32_plt_stub[] =
+ {
+ { 0xffff0000, 0x3d600000, 0 }, /* lis r11, xxxx */
+ { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0, 0, 0 }
+ };
+/* PLT stub in shared library. */
+static struct ppc_insn_pattern powerpc32_plt_stub_so[] =
+ {
+ { 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0xffffffff, 0x60000000, 0 }, /* nop */
+ { 0, 0, 0 }
+ };
+#define POWERPC32_PLT_STUB_LEN ARRAY_SIZE (powerpc32_plt_stub)
-/* An instruction to match. */
-struct insn_pattern
-{
- 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. */
-};
+/* 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. */
-/* 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)
+powerpc_linux_in_dynsym_resolve_code (CORE_ADDR pc)
{
- int i;
-
- for (i = 0; pattern[i].mask; i++)
- {
- 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;
- }
-
- return 1;
+ struct bound_minimal_symbol sym;
+
+ /* Check whether PC is in the dynamic linker. This also checks
+ whether it is in the .plt section, used by non-PIC executables. */
+ if (svr4_in_dynsym_resolve_code (pc))
+ return 1;
+
+ /* Check if we are in the resolver. */
+ sym = lookup_minimal_symbol_by_pc (pc);
+ if (sym.minsym != NULL
+ && (strcmp (MSYMBOL_LINKAGE_NAME (sym.minsym), "__glink") == 0
+ || strcmp (MSYMBOL_LINKAGE_NAME (sym.minsym),
+ "__glink_PLTresolve") == 0))
+ return 1;
+
+ return 0;
}
+/* Follow PLT stub to actual routine.
-/* 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);
-}
-
+ 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 PLT
+ stub sequence. */
-/* 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)
+ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
- return ((((CORE_ADDR) insn & 0xfffc) ^ 0x8000) - 0x8000);
-}
-
-
-/* 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);
-}
-
-
-/* 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[] =
- {
- /* addis r12, r2, <any> */
- { insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
-
- /* std r2, 40(r1) */
- { -1, insn_ds (62, 2, 1, 40, 0), 0 },
-
- /* ld r11, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
-
- /* addis r12, r12, 1 <optional> */
- { insn_d (-1, -1, -1, -1), insn_d (15, 12, 2, 1), 1 },
-
- /* ld r2, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 12, 0, 0), 0 },
-
- /* addis r12, r12, 1 <optional> */
- { insn_d (-1, -1, -1, -1), insn_d (15, 12, 2, 1), 1 },
-
- /* mtctr r11 */
- { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 11, 9, 467),
- 0 },
-
- /* ld r11, <any>(r12) */
- { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
-
- /* bctr */
- { -1, 0x4e800420, 0 },
-
- { 0, 0, 0 }
- };
-#define PPC64_STANDARD_LINKAGE_LEN \
- (sizeof (ppc64_standard_linkage) / sizeof (ppc64_standard_linkage[0]))
-
-/* When the dynamic linker is doing lazy symbol resolution, the first
- call to a function in another object will go like this:
-
- - The user's function calls the linkage function:
-
- 100007c4: 4b ff fc d5 bl 10000498
- 100007c8: e8 41 00 28 ld r2,40(r1)
-
- - The linkage function loads the entry point (and other stuff) from
- the function descriptor in the PLT, and jumps to it:
-
- 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
-
- - 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:
-
- 10000c98: 38 00 00 00 li r0,0
- 10000c9c: 4b ff ff dc b 10000c78
-
- - The common glink0 code then transfers control to the dynamic
- linker's fixup code:
-
- 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
-
- 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. */
-
-/* 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 (struct frame_info *frame,
- CORE_ADDR pc, unsigned int *insn)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame));
-
- /* The address of the function descriptor this linkage function
- references. */
- CORE_ADDR desc
- = ((CORE_ADDR) get_frame_register_unsigned (frame,
- tdep->ppc_gp0_regnum + 2)
- + (insn_d_field (insn[0]) << 16)
- + insn_ds_field (insn[2]));
+ unsigned int insnbuf[POWERPC32_PLT_STUB_LEN];
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR target = 0;
+ int scan_limit, i;
- /* The first word of the descriptor is the entry point. Return that. */
- return ppc64_desc_entry_point (desc);
-}
+ 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 more 4 instructions. */
+ for (i = 0; i < scan_limit; i++)
+ {
+ if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf))
+ {
+ /* Insn pattern is
+ lis r11, xxxx
+ lwz r11, xxxx(r11)
+ Branch target is in r11. */
+
+ target = (ppc_insn_d_field (insnbuf[0]) << 16)
+ | ppc_insn_d_field (insnbuf[1]);
+ target = read_memory_unsigned_integer (target, 4, byte_order);
+ }
+ else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so,
+ insnbuf))
+ {
+ /* Insn pattern is
+ lwz r11, xxxx(r30)
+ Branch target is in r11. */
+
+ target = get_frame_register_unsigned (frame,
+ tdep->ppc_gp0_regnum + 30)
+ + ppc_insn_d_field (insnbuf[0]);
+ target = read_memory_unsigned_integer (target, 4, byte_order);
+ }
+ else
+ {
+ /* Scan backward one more instructions if doesn't match. */
+ pc -= 4;
+ continue;
+ }
-/* 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 (struct frame_info *frame, CORE_ADDR pc)
-{
- unsigned int ppc64_standard_linkage_insn[PPC64_STANDARD_LINKAGE_LEN];
+ return target;
+ }
- if (insns_match_pattern (pc, ppc64_standard_linkage,
- ppc64_standard_linkage_insn))
- return ppc64_standard_linkage_target (frame, pc,
- ppc64_standard_linkage_insn);
- else
- return 0;
+ return 0;
}
+/* Wrappers to handle Linux-only registers. */
-/* Support for convert_from_func_ptr_addr (ARCH, ADDR, TARG) on PPC
- GNU/Linux.
-
- Usually a function pointer's representation is simply the address
- of the function. On GNU/Linux on the PowerPC however, a function
- pointer may be a pointer to a function descriptor.
-
- For PPC64, a function descriptor is a TOC entry, in a data section,
- which 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.
-
- For PPC32, there are two kinds of function pointers: non-secure and
- secure. Non-secure function pointers point directly to the
- function in a code section and thus need no translation. Secure
- ones (from GCC's -msecure-plt option) are in a data section and
- contain one word: the address of the function.
-
- 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, if needed. Be
- conservative, otherwise GDB will do the transformation on any
- random addresses such as occur when there is no symbol table. */
-
-static CORE_ADDR
-ppc_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
- CORE_ADDR addr,
- struct target_ops *targ)
+static void
+ppc_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
- struct gdbarch_tdep *tdep;
- struct section_table *s = target_section_by_addr (targ, addr);
- char *sect_name = NULL;
-
- if (!s)
- return addr;
+ const struct ppc_reg_offsets *offsets
+ = (const struct ppc_reg_offsets *) regset->regmap;
- tdep = gdbarch_tdep (gdbarch);
+ ppc_supply_gregset (regset, regcache, regnum, gregs, len);
- switch (tdep->wordsize)
+ if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
{
- case 4:
- sect_name = ".plt";
- break;
- case 8:
- sect_name = ".opd";
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("failed internal consistency check"));
+ /* "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);
}
-
- /* Check if ADDR points to a function descriptor. */
-
- /* NOTE: this depends on the coincidence that the address of a functions
- entry point is contained in the first word of its function descriptor
- for both PPC-64 and for PPC-32 with secure PLTs. */
- if ((strcmp (s->the_bfd_section->name, sect_name) == 0)
- && s->the_bfd_section->flags & SEC_DATA)
- return get_target_memory_unsigned (targ, addr, tdep->wordsize);
-
- return addr;
}
-/* This wrapper clears areas in the linux gregset not written by
- ppc_collect_gregset. */
-
static void
ppc_linux_collect_gregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *gregs, size_t len)
{
+ const struct ppc_reg_offsets *offsets
+ = (const struct ppc_reg_offsets *) regset->regmap;
+
+ /* Clear areas in the linux gregset not written elsewhere. */
if (regnum == -1)
memset (gregs, 0, len);
+
ppc_collect_gregset (regset, regcache, regnum, gregs, len);
+
+ if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
+ {
+ /* "orig_r3" is stored 2 slots after "pc". */
+ if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
+ ppc_collect_reg (regcache, PPC_ORIG_R3_REGNUM, (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);
+ }
}
/* Regset descriptions. */
/* AltiVec registers. */
/* .vr0_offset = */ 0,
- /* .vrsave_offset = */ 512,
- /* .vscr_offset = */ 512 + 12
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 528
};
static const struct ppc_reg_offsets ppc64_linux_reg_offsets =
/* AltiVec registers. */
/* .vr0_offset = */ 0,
- /* .vrsave_offset = */ 528,
- /* .vscr_offset = */ 512 + 12
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 528
};
static const struct regset ppc32_linux_gregset = {
&ppc32_linux_reg_offsets,
- ppc_supply_gregset,
- ppc_linux_collect_gregset,
- NULL
+ ppc_linux_supply_gregset,
+ ppc_linux_collect_gregset
};
static const struct regset ppc64_linux_gregset = {
&ppc64_linux_reg_offsets,
- ppc_supply_gregset,
- ppc_linux_collect_gregset,
- NULL
+ 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,
- NULL
+ ppc_collect_fpregset
+};
+
+static const struct regset ppc32_linux_vrregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_vrregset,
+ ppc_collect_vrregset
+};
+
+static const struct regset ppc32_linux_vsxregset = {
+ &ppc32_linux_reg_offsets,
+ ppc_supply_vsxregset,
+ ppc_collect_vsxregset
};
const struct regset *
return &ppc32_linux_fpregset;
}
-static const struct regset *
-ppc_linux_regset_from_core_section (struct gdbarch *core_arch,
- const char *sect_name, size_t sect_size)
+/* Iterate over supported core file register note sections. */
+
+static void
+ppc_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
- if (strcmp (sect_name, ".reg") == 0)
- {
- if (tdep->wordsize == 4)
- return &ppc32_linux_gregset;
- else
- return &ppc64_linux_gregset;
- }
- if (strcmp (sect_name, ".reg2") == 0)
- return &ppc32_linux_fpregset;
- return NULL;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int have_altivec = tdep->ppc_vr0_regnum != -1;
+ int have_vsx = tdep->ppc_vsr0_upper_regnum != -1;
+
+ if (tdep->wordsize == 4)
+ cb (".reg", 48 * 4, &ppc32_linux_gregset, NULL, cb_data);
+ else
+ cb (".reg", 48 * 8, &ppc64_linux_gregset, NULL, cb_data);
+
+ cb (".reg2", 264, &ppc32_linux_fpregset, NULL, cb_data);
+
+ if (have_altivec)
+ cb (".reg-ppc-vmx", 544, &ppc32_linux_vrregset, "ppc Altivec", cb_data);
+
+ if (have_vsx)
+ cb (".reg-ppc-vsx", 256, &ppc32_linux_vsxregset, "POWER7 VSX", cb_data);
}
static void
-ppc_linux_sigtramp_cache (struct frame_info *next_frame,
+ppc_linux_sigtramp_cache (struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func, LONGEST offset,
int bias)
CORE_ADDR gpregs;
CORE_ADDR fpregs;
int i;
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- base = frame_unwind_register_unsigned (next_frame,
- gdbarch_sp_regnum (current_gdbarch));
- if (bias > 0 && frame_pc_unwind (next_frame) != func)
+ 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;
regs = base + offset;
/* Use that to find the address of the corresponding register
buffers. */
- gpregs = read_memory_unsigned_integer (regs, tdep->wordsize);
+ gpregs = read_memory_unsigned_integer (regs, tdep->wordsize, byte_order);
fpregs = gpregs + 48 * tdep->wordsize;
/* General purpose. */
for (i = 0; i < 32; i++)
{
int regnum = i + tdep->ppc_gp0_regnum;
- trad_frame_set_reg_addr (this_cache, regnum, gpregs + i * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache,
+ regnum, gpregs + i * tdep->wordsize);
}
trad_frame_set_reg_addr (this_cache,
- gdbarch_pc_regnum (current_gdbarch),
+ 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_cr_regnum,
gpregs + 38 * tdep->wordsize);
+ if (ppc_linux_trap_reg_p (gdbarch))
+ {
+ trad_frame_set_reg_addr (this_cache, PPC_ORIG_R3_REGNUM,
+ gpregs + 34 * tdep->wordsize);
+ trad_frame_set_reg_addr (this_cache, PPC_TRAP_REGNUM,
+ gpregs + 40 * tdep->wordsize);
+ }
+
if (ppc_floating_point_unit_p (gdbarch))
{
/* Floating point registers. */
for (i = 0; i < 32; i++)
{
- int regnum = i + gdbarch_fp0_regnum (current_gdbarch);
+ int regnum = i + gdbarch_fp0_regnum (gdbarch);
trad_frame_set_reg_addr (this_cache, regnum,
fpregs + i * tdep->wordsize);
}
static void
ppc32_linux_sigaction_cache_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
0xd0 /* Offset to ucontext_t. */
+ 0x30 /* Offset to .reg. */,
0);
static void
ppc64_linux_sigaction_cache_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
0x80 /* Offset to ucontext_t. */
+ 0xe0 /* Offset to .reg. */,
128);
static void
ppc32_linux_sighandler_cache_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
0x40 /* Offset to ucontext_t. */
+ 0x1c /* Offset to .reg. */,
0);
static void
ppc64_linux_sighandler_cache_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ ppc_linux_sigtramp_cache (this_frame, this_cache, func,
0x80 /* Offset to struct sigcontext. */
+ 0x38 /* Offset to .reg. */,
128);
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;
+
+ /* If we do, then it is safe to check the size. */
+ return register_size (gdbarch, PPC_ORIG_R3_REGNUM) > 0
+ && register_size (gdbarch, PPC_TRAP_REGNUM) > 0;
+}
+
+/* Return the current system call's number present in the
+ r0 register. When the function fails, it returns -1. */
+static LONGEST
+ppc_linux_get_syscall_number (struct gdbarch *gdbarch,
+ ptid_t ptid)
+{
+ struct regcache *regcache = get_thread_regcache (ptid);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct cleanup *cleanbuf;
+ /* The content of a register */
+ gdb_byte *buf;
+ /* The result */
+ LONGEST ret;
+
+ /* Make sure we're in a 32- or 64-bit machine */
+ gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8);
+
+ buf = (gdb_byte *) xmalloc (tdep->wordsize * sizeof (gdb_byte));
+
+ cleanbuf = make_cleanup (xfree, buf);
+
+ /* Getting the system call number from the register.
+ When dealing with PowerPC architecture, this information
+ is stored at 0th register. */
+ regcache_cooked_read (regcache, tdep->ppc_gp0_regnum, buf);
+
+ ret = extract_signed_integer (buf, tdep->wordsize, byte_order);
+ do_cleanups (cleanbuf);
+
+ return ret;
+}
+
+/* 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 preocess reocrd 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 = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ ULONGEST scnum;
+ enum gdb_syscall syscall_gdb;
+ int ret;
+ int i;
+
+ 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 (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 = get_regcache_arch (regcache);
+
+ 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 int
+ppc_linux_spu_section (bfd *abfd, asection *asect, void *user_data)
+{
+ return startswith (bfd_section_name (abfd, asect), "SPU/");
+}
+
+static const struct target_desc *
+ppc_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
+{
+ asection *cell = bfd_sections_find_if (abfd, ppc_linux_spu_section, NULL);
+ asection *altivec = bfd_get_section_by_name (abfd, ".reg-ppc-vmx");
+ asection *vsx = bfd_get_section_by_name (abfd, ".reg-ppc-vsx");
+ asection *section = bfd_get_section_by_name (abfd, ".reg");
+ if (! section)
+ return NULL;
+
+ switch (bfd_section_size (abfd, section))
+ {
+ case 48 * 4:
+ if (cell)
+ return tdesc_powerpc_cell32l;
+ else if (vsx)
+ return tdesc_powerpc_vsx32l;
+ else if (altivec)
+ return tdesc_powerpc_altivec32l;
+ else
+ return tdesc_powerpc_32l;
+
+ case 48 * 8:
+ if (cell)
+ return tdesc_powerpc_cell64l;
+ else if (vsx)
+ return tdesc_powerpc_vsx64l;
+ else if (altivec)
+ return tdesc_powerpc_altivec64l;
+ else
+ return tdesc_powerpc_64l;
+
+ default:
+ return NULL;
+ }
+}
+
+
+/* Implementation of `gdbarch_elf_make_msymbol_special', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
+
+static void
+ppc_elfv2_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
+{
+ elf_symbol_type *elf_sym = (elf_symbol_type *)sym;
+
+ /* If the symbol is marked as having a local entry point, set a target
+ flag in the msymbol. We currently only support local entry point
+ offsets of 8 bytes, which is the only entry point offset ever used
+ by current compilers. If/when other offsets are ever used, we will
+ have to use additional target flag bits to store them. */
+ switch (PPC64_LOCAL_ENTRY_OFFSET (elf_sym->internal_elf_sym.st_other))
+ {
+ default:
+ break;
+ case 8:
+ MSYMBOL_TARGET_FLAG_1 (msym) = 1;
+ break;
+ }
+}
+
+/* Implementation of `gdbarch_skip_entrypoint', as defined in
+ gdbarch.h. This implementation is used for the ELFv2 ABI only. */
+
+static CORE_ADDR
+ppc_elfv2_skip_entrypoint (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ 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. */
+
+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;
+}
+
+/* Cell/B.E. active SPE context tracking support. */
+
+static struct objfile *spe_context_objfile = NULL;
+static CORE_ADDR spe_context_lm_addr = 0;
+static CORE_ADDR spe_context_offset = 0;
+
+static ptid_t spe_context_cache_ptid;
+static CORE_ADDR spe_context_cache_address;
+
+/* Hook into inferior_created, solib_loaded, and solib_unloaded observers
+ to track whether we've loaded a version of libspe2 (as static or dynamic
+ library) that provides the __spe_current_active_context variable. */
+static void
+ppc_linux_spe_context_lookup (struct objfile *objfile)
+{
+ struct bound_minimal_symbol sym;
+
+ if (!objfile)
+ {
+ spe_context_objfile = NULL;
+ spe_context_lm_addr = 0;
+ spe_context_offset = 0;
+ spe_context_cache_ptid = minus_one_ptid;
+ spe_context_cache_address = 0;
+ return;
+ }
+
+ sym = lookup_minimal_symbol ("__spe_current_active_context", NULL, objfile);
+ if (sym.minsym)
+ {
+ spe_context_objfile = objfile;
+ spe_context_lm_addr = svr4_fetch_objfile_link_map (objfile);
+ spe_context_offset = MSYMBOL_VALUE_RAW_ADDRESS (sym.minsym);
+ spe_context_cache_ptid = minus_one_ptid;
+ spe_context_cache_address = 0;
+ return;
+ }
+}
+
+static void
+ppc_linux_spe_context_inferior_created (struct target_ops *t, int from_tty)
+{
+ struct objfile *objfile;
+
+ ppc_linux_spe_context_lookup (NULL);
+ ALL_OBJFILES (objfile)
+ ppc_linux_spe_context_lookup (objfile);
+}
+
+static void
+ppc_linux_spe_context_solib_loaded (struct so_list *so)
+{
+ if (strstr (so->so_original_name, "/libspe") != NULL)
+ {
+ solib_read_symbols (so, 0);
+ ppc_linux_spe_context_lookup (so->objfile);
+ }
+}
+
+static void
+ppc_linux_spe_context_solib_unloaded (struct so_list *so)
+{
+ if (so->objfile == spe_context_objfile)
+ ppc_linux_spe_context_lookup (NULL);
+}
+
+/* Retrieve contents of the N'th element in the current thread's
+ linked SPE context list into ID and NPC. Return the address of
+ said context element, or 0 if not found. */
+static CORE_ADDR
+ppc_linux_spe_context (int wordsize, enum bfd_endian byte_order,
+ int n, int *id, unsigned int *npc)
+{
+ CORE_ADDR spe_context = 0;
+ gdb_byte buf[16];
+ int i;
+
+ /* Quick exit if we have not found __spe_current_active_context. */
+ if (!spe_context_objfile)
+ return 0;
+
+ /* Look up cached address of thread-local variable. */
+ if (!ptid_equal (spe_context_cache_ptid, inferior_ptid))
+ {
+ struct target_ops *target = ¤t_target;
+
+ TRY
+ {
+ /* We do not call target_translate_tls_address here, because
+ svr4_fetch_objfile_link_map may invalidate the frame chain,
+ which must not do while inside a frame sniffer.
+
+ Instead, we have cached the lm_addr value, and use that to
+ directly call the target's to_get_thread_local_address. */
+ spe_context_cache_address
+ = target->to_get_thread_local_address (target, inferior_ptid,
+ spe_context_lm_addr,
+ spe_context_offset);
+ spe_context_cache_ptid = inferior_ptid;
+ }
+
+ CATCH (ex, RETURN_MASK_ERROR)
+ {
+ return 0;
+ }
+ END_CATCH
+ }
+
+ /* Read variable value. */
+ if (target_read_memory (spe_context_cache_address, buf, wordsize) == 0)
+ spe_context = extract_unsigned_integer (buf, wordsize, byte_order);
+
+ /* Cyle through to N'th linked list element. */
+ for (i = 0; i < n && spe_context; i++)
+ if (target_read_memory (spe_context + align_up (12, wordsize),
+ buf, wordsize) == 0)
+ spe_context = extract_unsigned_integer (buf, wordsize, byte_order);
+ else
+ spe_context = 0;
+
+ /* Read current context. */
+ if (spe_context
+ && target_read_memory (spe_context, buf, 12) != 0)
+ spe_context = 0;
+
+ /* Extract data elements. */
+ if (spe_context)
+ {
+ if (id)
+ *id = extract_signed_integer (buf, 4, byte_order);
+ if (npc)
+ *npc = extract_unsigned_integer (buf + 4, 4, byte_order);
+ }
+
+ return spe_context;
+}
+
+
+/* Cell/B.E. cross-architecture unwinder support. */
+
+struct ppu2spu_cache
+{
+ struct frame_id frame_id;
+ struct regcache *regcache;
+};
+
+static struct gdbarch *
+ppu2spu_prev_arch (struct frame_info *this_frame, void **this_cache)
+{
+ struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache;
+ return get_regcache_arch (cache->regcache);
+}
+
+static void
+ppu2spu_this_id (struct frame_info *this_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache;
+ *this_id = cache->frame_id;
+}
+
+static struct value *
+ppu2spu_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache;
+ struct gdbarch *gdbarch = get_regcache_arch (cache->regcache);
+ gdb_byte *buf;
+
+ buf = (gdb_byte *) alloca (register_size (gdbarch, regnum));
+
+ if (regnum < gdbarch_num_regs (gdbarch))
+ regcache_raw_read (cache->regcache, regnum, buf);
+ else
+ gdbarch_pseudo_register_read (gdbarch, cache->regcache, regnum, buf);
+
+ return frame_unwind_got_bytes (this_frame, regnum, buf);
+}
+
+struct ppu2spu_data
+{
+ struct gdbarch *gdbarch;
+ int id;
+ unsigned int npc;
+ gdb_byte gprs[128*16];
+};
+
+static enum register_status
+ppu2spu_unwind_register (void *src, int regnum, gdb_byte *buf)
+{
+ struct ppu2spu_data *data = (struct ppu2spu_data *) src;
+ enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
+
+ if (regnum >= 0 && regnum < SPU_NUM_GPRS)
+ memcpy (buf, data->gprs + 16*regnum, 16);
+ else if (regnum == SPU_ID_REGNUM)
+ store_unsigned_integer (buf, 4, byte_order, data->id);
+ else if (regnum == SPU_PC_REGNUM)
+ store_unsigned_integer (buf, 4, byte_order, data->npc);
+ else
+ return REG_UNAVAILABLE;
+
+ return REG_VALID;
+}
+
+static int
+ppu2spu_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame, void **this_prologue_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct ppu2spu_data data;
+ struct frame_info *fi;
+ CORE_ADDR base, func, backchain, spe_context;
+ gdb_byte buf[8];
+ int n = 0;
+
+ /* Count the number of SPU contexts already in the frame chain. */
+ for (fi = get_next_frame (this_frame); fi; fi = get_next_frame (fi))
+ if (get_frame_type (fi) == ARCH_FRAME
+ && gdbarch_bfd_arch_info (get_frame_arch (fi))->arch == bfd_arch_spu)
+ n++;
+
+ base = get_frame_sp (this_frame);
+ func = get_frame_pc (this_frame);
+ if (target_read_memory (base, buf, tdep->wordsize))
+ return 0;
+ backchain = extract_unsigned_integer (buf, tdep->wordsize, byte_order);
+
+ spe_context = ppc_linux_spe_context (tdep->wordsize, byte_order,
+ n, &data.id, &data.npc);
+ if (spe_context && base <= spe_context && spe_context < backchain)
+ {
+ char annex[32];
+
+ /* Find gdbarch for SPU. */
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ info.bfd_arch_info = bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu);
+ info.byte_order = BFD_ENDIAN_BIG;
+ info.osabi = GDB_OSABI_LINUX;
+ info.tdep_info = (struct gdbarch_tdep_info *) &data.id;
+ data.gdbarch = gdbarch_find_by_info (info);
+ if (!data.gdbarch)
+ return 0;
+
+ xsnprintf (annex, sizeof annex, "%d/regs", data.id);
+ if (target_read (¤t_target, TARGET_OBJECT_SPU, annex,
+ data.gprs, 0, sizeof data.gprs)
+ == sizeof data.gprs)
+ {
+ struct ppu2spu_cache *cache
+ = FRAME_OBSTACK_CALLOC (1, struct ppu2spu_cache);
+
+ struct address_space *aspace = get_frame_address_space (this_frame);
+ struct regcache *regcache = regcache_xmalloc (data.gdbarch, aspace);
+ struct cleanup *cleanups = make_cleanup_regcache_xfree (regcache);
+ regcache_save (regcache, ppu2spu_unwind_register, &data);
+ discard_cleanups (cleanups);
+
+ cache->frame_id = frame_id_build (base, func);
+ cache->regcache = regcache;
+ *this_prologue_cache = cache;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void
+ppu2spu_dealloc_cache (struct frame_info *self, void *this_cache)
+{
+ struct ppu2spu_cache *cache = (struct ppu2spu_cache *) this_cache;
+ regcache_xfree (cache->regcache);
+}
+
+static const struct frame_unwind ppu2spu_unwind = {
+ ARCH_FRAME,
+ default_frame_unwind_stop_reason,
+ ppu2spu_this_id,
+ ppu2spu_prev_register,
+ NULL,
+ ppu2spu_sniffer,
+ ppu2spu_dealloc_cache,
+ ppu2spu_prev_arch,
+};
+
+/* 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;
+
+ /* These values are the size of the type that will be used in a system
+ call. They are obtained from Linux Kernel source. */
+
+ 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 = 152;
+ record_tdep->size_old_sigset_t = 128;
+ 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_dirent = 280;
+ record_tdep->size_dirent64 = 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 = 32;
+ record_tdep->size_sigaction = 152;
+ record_tdep->size_sigset_t = 128;
+ 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_siginfo = 128;
+ 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;
+ }
+ 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 = 152;
+ record_tdep->size_old_sigset_t = 128;
+ 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_dirent = 268;
+ record_tdep->size_dirent64 = 280;
+ 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 = 32;
+ record_tdep->size_sigaction = 140;
+ record_tdep->size_sigset_t = 128;
+ 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_siginfo = 128;
+ 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;
+ }
+ 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 void
ppc_linux_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* 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. */
- /* NOTE: cagney/2005-01-25: True for both 32- and 64-bit. */
- set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
-
- /* Handle PPC GNU/Linux 64-bit function pointers (which are really
- function descriptors) and 32-bit secure PLT entries. */
- set_gdbarch_convert_from_func_ptr_addr
- (gdbarch, ppc_linux_convert_from_func_ptr_addr);
+ struct tdesc_arch_data *tdesc_data
+ = (struct tdesc_arch_data *) info.tdep_info;
+ static const char *const stap_integer_prefixes[] = { "i", NULL };
+ static const char *const stap_register_indirection_prefixes[] = { "(",
+ NULL };
+ static const char *const stap_register_indirection_suffixes[] = { ")",
+ NULL };
+
+ linux_init_abi (info, gdbarch);
+
+ /* PPC GNU/Linux uses either 64-bit or 128-bit long doubles; where
+ 128-bit, they are IBM long double, not IEEE quad long double as
+ in the System V ABI PowerPC Processor Supplement. We can safely
+ let them default to 128-bit, since the debug info will give the
+ size of type actually used in each case. */
+ set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double);
+
+ /* Handle inferior calls during interrupted system calls. */
+ set_gdbarch_write_pc (gdbarch, ppc_linux_write_pc);
+
+ /* Get the syscall number from the arch's register. */
+ set_gdbarch_get_syscall_number (gdbarch, ppc_linux_get_syscall_number);
+
+ /* SystemTap functions. */
+ set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
+ set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+ stap_register_indirection_prefixes);
+ set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+ stap_register_indirection_suffixes);
+ set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
+ set_gdbarch_stap_is_single_operand (gdbarch, ppc_stap_is_single_operand);
+ set_gdbarch_stap_parse_special_token (gdbarch,
+ ppc_stap_parse_special_token);
if (tdep->wordsize == 4)
{
/* Until November 2001, gcc did not comply with the 32 bit SysV
R4 ABI requirement that structures less than or equal to 8
bytes should be returned in registers. Instead GCC was using
- the 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_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, 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);
+ 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)
{
+ 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);
+ }
+
/* 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);
+
/* Trampolines. */
- tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sigaction_tramp_frame);
- tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sighandler_tramp_frame);
+ 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);
+
+ /* PPC32 uses a different prpsinfo32 compared to most other Linux
+ archs. */
+ if (tdep->wordsize == 4)
+ set_gdbarch_elfcore_write_linux_prpsinfo (gdbarch,
+ elfcore_write_ppc_linux_prpsinfo32);
+
+ 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");
+ }
+ }
+
+ /* Enable Cell/B.E. if supported by the target. */
+ if (tdesc_compatible_p (info.target_desc,
+ bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu)))
+ {
+ /* Cell/B.E. multi-architecture support. */
+ set_spu_solib_ops (gdbarch);
+
+ /* Cell/B.E. cross-architecture unwinder support. */
+ frame_unwind_prepend_unwinder (gdbarch, &ppu2spu_unwind);
+ }
+
+ 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);
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_ppc_linux_tdep;
+
void
_initialize_ppc_linux_tdep (void)
{
ppc_linux_init_abi);
gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
ppc_linux_init_abi);
+
+ /* Attach to observers to track __spe_current_active_context. */
+ observer_attach_inferior_created (ppc_linux_spe_context_inferior_created);
+ observer_attach_solib_loaded (ppc_linux_spe_context_solib_loaded);
+ observer_attach_solib_unloaded (ppc_linux_spe_context_solib_unloaded);
+
+ /* Initialize the Linux target descriptions. */
+ initialize_tdesc_powerpc_32l ();
+ initialize_tdesc_powerpc_altivec32l ();
+ initialize_tdesc_powerpc_cell32l ();
+ initialize_tdesc_powerpc_vsx32l ();
+ initialize_tdesc_powerpc_isa205_32l ();
+ initialize_tdesc_powerpc_isa205_altivec32l ();
+ initialize_tdesc_powerpc_isa205_vsx32l ();
+ initialize_tdesc_powerpc_64l ();
+ initialize_tdesc_powerpc_altivec64l ();
+ initialize_tdesc_powerpc_cell64l ();
+ initialize_tdesc_powerpc_vsx64l ();
+ initialize_tdesc_powerpc_isa205_64l ();
+ initialize_tdesc_powerpc_isa205_altivec64l ();
+ initialize_tdesc_powerpc_isa205_vsx64l ();
+ initialize_tdesc_powerpc_e500l ();
}