/* Target-dependent code for GDB, the GNU debugger.
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1997, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GDB.
#include "regcache.h"
#include "value.h"
#include "osabi.h"
-
+#include "regset.h"
#include "solib-svr4.h"
#include "ppc-tdep.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
+#include "tramp-frame.h"
/* The following instructions are used in the signal trampoline code
on GNU/Linux PPC. The kernel used to use magic syscalls 0x6666 and
/* Determine if pc is in a signal trampoline...
Ha! That's not what this does at all. wait_for_inferior in
- infrun.c calls PC_IN_SIGTRAMP in order to detect entry into a
+ 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
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.)
-
- PC_IN_SIGTRAMP is called from blockframe.c as well in order to set
- the frame's type (if a SIGTRAMP_FRAME). Because of our strange
- definition of in_sigtramp below, we can't rely on the frame's type
- getting set correctly from within blockframe.c. This is why we
- take pains to set it in init_extra_frame_info().
-
- NOTE: cagney/2002-11-10: I suspect the real problem here is that
- the get_prev_frame() only initializes the frame's type after the
- call to INIT_FRAME_INFO. get_prev_frame() should be fixed, this
- code shouldn't be working its way around a bug :-(. */
+ 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];
+ gdb_byte buf[4];
CORE_ADDR handler;
lr = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
static int
ppc_linux_at_sigtramp_return_path (CORE_ADDR pc)
{
- char buf[12];
+ gdb_byte buf[12];
unsigned long pcinsn;
if (target_read_memory (pc - 4, buf, sizeof (buf)) != 0)
return 0;
static CORE_ADDR
ppc_linux_skip_trampoline_code (CORE_ADDR pc)
{
- char buf[4];
+ gdb_byte buf[4];
struct obj_section *sect;
struct objfile *objfile;
unsigned long insn;
/* 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)
+ 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
return SYMBOL_VALUE_ADDRESS (msymbol);
}
-/* The rs6000 version of FRAME_SAVED_PC will almost work for us. The
- signal handler details are different, so we'll handle those here
- and call the rs6000 version to do the rest. */
-CORE_ADDR
-ppc_linux_frame_saved_pc (struct frame_info *fi)
-{
- if ((get_frame_type (fi) == SIGTRAMP_FRAME))
- {
- CORE_ADDR regs_addr =
- read_memory_integer (get_frame_base (fi)
- + PPC_LINUX_REGS_PTR_OFFSET, 4);
- /* return the NIP in the regs array */
- return read_memory_integer (regs_addr + 4 * PPC_LINUX_PT_NIP, 4);
- }
- else if (get_next_frame (fi)
- && (get_frame_type (get_next_frame (fi)) == SIGTRAMP_FRAME))
- {
- CORE_ADDR regs_addr =
- read_memory_integer (get_frame_base (get_next_frame (fi))
- + PPC_LINUX_REGS_PTR_OFFSET, 4);
- /* return LNK in the regs array */
- return read_memory_integer (regs_addr + 4 * PPC_LINUX_PT_LNK, 4);
- }
- else
- return rs6000_frame_saved_pc (fi);
-}
-
-void
-ppc_linux_init_extra_frame_info (int fromleaf, struct frame_info *fi)
-{
- rs6000_init_extra_frame_info (fromleaf, fi);
-
- if (get_next_frame (fi) != 0)
- {
- /* We're called from get_prev_frame_info; check to see if
- this is a signal frame by looking to see if the pc points
- at trampoline code */
- if (ppc_linux_at_sigtramp_return_path (get_frame_pc (fi)))
- deprecated_set_frame_type (fi, SIGTRAMP_FRAME);
- else
- /* FIXME: cagney/2002-11-10: Is this double bogus? What
- happens if the frame has previously been marked as a dummy? */
- deprecated_set_frame_type (fi, NORMAL_FRAME);
- }
-}
-
-int
-ppc_linux_frameless_function_invocation (struct frame_info *fi)
-{
- /* We'll find the wrong thing if we let
- rs6000_frameless_function_invocation () search for a signal trampoline */
- if (ppc_linux_at_sigtramp_return_path (get_frame_pc (fi)))
- return 0;
- else
- return rs6000_frameless_function_invocation (fi);
-}
-
-void
-ppc_linux_frame_init_saved_regs (struct frame_info *fi)
-{
- if ((get_frame_type (fi) == SIGTRAMP_FRAME))
- {
- CORE_ADDR regs_addr;
- int i;
- if (deprecated_get_frame_saved_regs (fi))
- return;
-
- frame_saved_regs_zalloc (fi);
-
- regs_addr =
- read_memory_integer (get_frame_base (fi)
- + PPC_LINUX_REGS_PTR_OFFSET, 4);
- deprecated_get_frame_saved_regs (fi)[PC_REGNUM] = regs_addr + 4 * PPC_LINUX_PT_NIP;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_ps_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_MSR;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_cr_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_CCR;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_lr_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_LNK;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_CTR;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_xer_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_XER;
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_mq_regnum] =
- regs_addr + 4 * PPC_LINUX_PT_MQ;
- for (i = 0; i < 32; i++)
- deprecated_get_frame_saved_regs (fi)[gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + i] =
- regs_addr + 4 * PPC_LINUX_PT_R0 + 4 * i;
- for (i = 0; i < 32; i++)
- deprecated_get_frame_saved_regs (fi)[FP0_REGNUM + i] = regs_addr + 4 * PPC_LINUX_PT_FPR0 + 8 * i;
- }
- else
- rs6000_frame_init_saved_regs (fi);
-}
-
-CORE_ADDR
-ppc_linux_frame_chain (struct frame_info *thisframe)
-{
- /* Kernel properly constructs the frame chain for the handler */
- if ((get_frame_type (thisframe) == SIGTRAMP_FRAME))
- return read_memory_integer (get_frame_base (thisframe), 4);
- else
- return rs6000_frame_chain (thisframe);
-}
-
/* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint
in much the same fashion as memory_remove_breakpoint in mem-break.c,
but is careful not to write back the previous contents if the code
regard to removing breakpoints in some potentially self modifying
code. */
int
-ppc_linux_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
+ppc_linux_memory_remove_breakpoint (CORE_ADDR addr,
+ gdb_byte *contents_cache)
{
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.");
+ error (_("Software breakpoints not implemented for this target."));
val = target_read_memory (addr, old_contents, bplen);
structures, no matter their size, are put in memory. Vectors,
which were added later, do get returned in a register though. */
-static int
-ppc_linux_use_struct_convention (int gcc_p, struct type *value_type)
+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)
{
- if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8)
- && TYPE_VECTOR (value_type))
- return 0;
- return 1;
+ if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
+ || TYPE_CODE (valtype) == TYPE_CODE_UNION)
+ && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8)
+ && TYPE_VECTOR (valtype)))
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ else
+ return ppc_sysv_abi_return_value (gdbarch, valtype, regcache, readbuf,
+ writebuf);
}
/* Fetch (and possibly build) an appropriate link_map_offsets
#define PPC64_STANDARD_LINKAGE_LEN \
(sizeof (ppc64_standard_linkage) / sizeof (ppc64_standard_linkage[0]))
-
-/* 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);
-}
-
-
/* When the dynamic linker is doing lazy symbol resolution, the first
call to a function in another object will go like this:
}
-/* Support for CONVERT_FROM_FUNC_PTR_ADDR(ADDR) on PPC64 GNU/Linux.
+/* 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
random addresses such as occures when there is no symbol table. */
static CORE_ADDR
-ppc64_linux_convert_from_func_ptr_addr (CORE_ADDR addr)
+ppc64_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ)
{
- struct obj_section *s;
-
- s = find_pc_section (addr);
+ struct section_table *s = target_section_by_addr (targ, addr);
/* Check if ADDR points to a function descriptor. */
if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
- return read_memory_unsigned_integer (addr, 8);
+ return get_target_memory_unsigned (targ, addr, 8);
return addr;
}
+static void
+right_supply_register (struct regcache *regcache, int wordsize, int regnum,
+ const bfd_byte *buf)
+{
+ regcache_raw_supply (regcache, regnum,
+ (buf + wordsize - register_size (current_gdbarch, regnum)));
+}
-enum {
- ELF_NGREG = 48,
- ELF_NFPREG = 33,
- ELF_NVRREG = 33
-};
-
-enum {
- ELF_GREGSET_SIZE = (ELF_NGREG * 4),
- ELF_FPREGSET_SIZE = (ELF_NFPREG * 8)
-};
+/* 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. */
void
-ppc_linux_supply_gregset (char *buf)
+ppc_linux_supply_gregset (struct regcache *regcache,
+ int regnum, const void *gregs, size_t size,
+ int wordsize)
{
int regi;
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- for (regi = 0; regi < 32; regi++)
- supply_register (regi, buf + 4 * regi);
-
- supply_register (PC_REGNUM, buf + 4 * PPC_LINUX_PT_NIP);
- supply_register (tdep->ppc_lr_regnum, buf + 4 * PPC_LINUX_PT_LNK);
- supply_register (tdep->ppc_cr_regnum, buf + 4 * PPC_LINUX_PT_CCR);
- supply_register (tdep->ppc_xer_regnum, buf + 4 * PPC_LINUX_PT_XER);
- supply_register (tdep->ppc_ctr_regnum, buf + 4 * PPC_LINUX_PT_CTR);
- if (tdep->ppc_mq_regnum != -1)
- supply_register (tdep->ppc_mq_regnum, buf + 4 * PPC_LINUX_PT_MQ);
- supply_register (tdep->ppc_ps_regnum, buf + 4 * PPC_LINUX_PT_MSR);
+ 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);
}
+static void
+ppc32_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t size)
+{
+ ppc_linux_supply_gregset (regcache, regnum, gregs, size, 4);
+}
+
+static struct regset ppc32_linux_gregset = {
+ NULL, ppc32_linux_supply_gregset
+};
+
+static void
+ppc64_linux_supply_gregset (const struct regset *regset,
+ struct regcache * regcache,
+ int regnum, const void *gregs, size_t size)
+{
+ ppc_linux_supply_gregset (regcache, regnum, gregs, size, 8);
+}
+
+static struct regset ppc64_linux_gregset = {
+ NULL, ppc64_linux_supply_gregset
+};
+
void
-ppc_linux_supply_fpregset (char *buf)
+ppc_linux_supply_fpregset (const struct regset *regset,
+ struct regcache * regcache,
+ int regnum, const void *fpset, size_t size)
{
int regi;
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ struct gdbarch *regcache_arch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *regcache_tdep = gdbarch_tdep (regcache_arch);
+ const bfd_byte *buf = fpset;
+
+ if (! ppc_floating_point_unit_p (regcache_arch))
+ return;
+
+ for (regi = 0; regi < ppc_num_fprs; regi++)
+ regcache_raw_supply (regcache,
+ regcache_tdep->ppc_fp0_regnum + regi,
+ buf + 8 * regi);
+
+ /* 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);
+}
- for (regi = 0; regi < 32; regi++)
- supply_register (FP0_REGNUM + regi, buf + 8 * regi);
+static struct regset ppc_linux_fpregset = { NULL, ppc_linux_supply_fpregset };
- /* The FPSCR is stored in the low order word of the last doubleword in the
- fpregset. */
- supply_register (tdep->ppc_fpscr_regnum, buf + 8 * 32 + 4);
+static const struct regset *
+ppc_linux_regset_from_core_section (struct gdbarch *core_arch,
+ const char *sect_name, size_t sect_size)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
+ if (strcmp (sect_name, ".reg") == 0)
+ {
+ if (tdep->wordsize == 4)
+ return &ppc32_linux_gregset;
+ else
+ return &ppc64_linux_gregset;
+ }
+ if (strcmp (sect_name, ".reg2") == 0)
+ return &ppc_linux_fpregset;
+ return NULL;
}
-/*
- Use a local version of this function to get the correct types for regsets.
-*/
-
static void
-fetch_core_registers (char *core_reg_sect,
- unsigned core_reg_size,
- int which,
- CORE_ADDR reg_addr)
+ppc_linux_sigtramp_cache (struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func, LONGEST offset,
+ int bias)
{
- if (which == 0)
+ CORE_ADDR base;
+ CORE_ADDR regs;
+ CORE_ADDR gpregs;
+ CORE_ADDR fpregs;
+ int i;
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+ if (bias > 0 && frame_pc_unwind (next_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);
+ fpregs = gpregs + 48 * tdep->wordsize;
+
+ /* General purpose. */
+ for (i = 0; i < 32; i++)
{
- if (core_reg_size == ELF_GREGSET_SIZE)
- ppc_linux_supply_gregset (core_reg_sect);
- else
- warning ("wrong size gregset struct in core file");
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (this_cache, regnum, gpregs + i * tdep->wordsize);
}
- else if (which == 2)
+ trad_frame_set_reg_addr (this_cache, PC_REGNUM, 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);
+
+ /* Floating point registers. */
+ for (i = 0; i < 32; i++)
{
- if (core_reg_size == ELF_FPREGSET_SIZE)
- ppc_linux_supply_fpregset (core_reg_sect);
- else
- warning ("wrong size fpregset struct in core file");
+ int regnum = i + FP0_REGNUM;
+ trad_frame_set_reg_addr (this_cache, regnum, fpregs + i * tdep->wordsize);
}
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_fpscr_regnum,
+ fpregs + 32 * tdep->wordsize);
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static void
+ppc32_linux_sigaction_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ 0xd0 /* Offset to ucontext_t. */
+ + 0x30 /* Offset to .reg. */,
+ 0);
}
-/* Register that we are able to handle ELF file formats using standard
- procfs "regset" structures. */
+static void
+ppc64_linux_sigaction_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ 0x80 /* Offset to ucontext_t. */
+ + 0xe0 /* Offset to .reg. */,
+ 128);
+}
-static struct core_fns ppc_linux_regset_core_fns =
+static void
+ppc32_linux_sighandler_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
+ ppc_linux_sigtramp_cache (next_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 trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ ppc_linux_sigtramp_cache (next_frame, this_cache, func,
+ 0x80 /* Offset to struct sigcontext. */
+ + 0x38 /* Offset to .reg. */,
+ 128);
+}
+
+static struct tramp_frame ppc32_linux_sigaction_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x380000ac, -1 }, /* li r0, 172 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sigaction_cache_init
+};
+static struct tramp_frame ppc64_linux_sigaction_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, -1 }, /* addi r1,r1,128 */
+ { 0x380000ac, -1 }, /* li r0, 172 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sigaction_cache_init
+};
+static struct tramp_frame ppc32_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38000077, -1 }, /* li r0,119 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc32_linux_sighandler_cache_init
+};
+static struct tramp_frame ppc64_linux_sighandler_tramp_frame = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x38210080, -1 }, /* addi r1,r1,128 */
+ { 0x38000077, -1 }, /* li r0,119 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN },
+ },
+ ppc64_linux_sighandler_cache_init
};
static void
{
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);
+
if (tdep->wordsize == 4)
{
/* Until November 2001, gcc did not comply with the 32 bit SysV
(well ignoring vectors that is). When this was corrected, it
wasn't fixed for GNU/Linux native platform. Use the
PowerOpen struct convention. */
- set_gdbarch_use_struct_convention (gdbarch, ppc_linux_use_struct_convention);
-
- /* Note: kevinb/2002-04-12: See note in rs6000_gdbarch_init regarding
- *_push_arguments(). The same remarks hold for the methods below. */
- set_gdbarch_frameless_function_invocation (gdbarch,
- ppc_linux_frameless_function_invocation);
- set_gdbarch_deprecated_frame_chain (gdbarch, ppc_linux_frame_chain);
- set_gdbarch_deprecated_frame_saved_pc (gdbarch, ppc_linux_frame_saved_pc);
-
- set_gdbarch_deprecated_frame_init_saved_regs (gdbarch,
- ppc_linux_frame_init_saved_regs);
- set_gdbarch_deprecated_init_extra_frame_info (gdbarch,
- ppc_linux_init_extra_frame_info);
+ set_gdbarch_return_value (gdbarch, ppc_linux_return_value);
set_gdbarch_memory_remove_breakpoint (gdbarch,
ppc_linux_memory_remove_breakpoint);
+
/* Shared library handling. */
- set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
set_gdbarch_skip_trampoline_code (gdbarch,
ppc_linux_skip_trampoline_code);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, ppc_linux_svr4_fetch_link_map_offsets);
+
+ /* Trampolines. */
+ tramp_frame_prepend_unwinder (gdbarch, &ppc32_linux_sigaction_tramp_frame);
+ tramp_frame_prepend_unwinder (gdbarch, &ppc32_linux_sighandler_tramp_frame);
}
if (tdep->wordsize == 8)
function descriptors). */
set_gdbarch_convert_from_func_ptr_addr
(gdbarch, ppc64_linux_convert_from_func_ptr_addr);
-
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, ppc64_in_solib_call_trampoline);
set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
+
+ /* Trampolines. */
+ tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sigaction_tramp_frame);
+ tramp_frame_prepend_unwinder (gdbarch, &ppc64_linux_sighandler_tramp_frame);
}
+ set_gdbarch_regset_from_core_section (gdbarch, ppc_linux_regset_from_core_section);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
}
void
_initialize_ppc_linux_tdep (void)
{
- gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_LINUX,
- ppc_linux_init_abi);
- add_core_fns (&ppc_linux_regset_core_fns);
+ /* Register for all sub-familes of the POWER/PowerPC: 32-bit and
+ 64-bit PowerPC, and the older rs6k. */
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
+ ppc_linux_init_abi);
}
projects / deliverable / binutils-gdb.git / blobdiff