X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fmips-linux-tdep.c;h=fe45dcc3bdbca8ddd6225346fa1331e5d0c7c69a;hb=32b40af94e919e235c21486110311647cbeecf2e;hp=6cb9c5e7af6b8655d2cc7d8495a34b2bf918c0a9;hpb=607fc93c5df0e62dc803b98bee71e464557aa07a;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c
index 6cb9c5e7af..fe45dcc3bd 100644
--- a/gdb/mips-linux-tdep.c
+++ b/gdb/mips-linux-tdep.c
@@ -1,12 +1,12 @@
/* Target-dependent code for GNU/Linux on MIPS processors.
- Copyright 2001, 2002, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 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,
@@ -15,9 +15,7 @@
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 . */
#include "defs.h"
#include "gdbcore.h"
@@ -25,65 +23,88 @@
#include "solib-svr4.h"
#include "osabi.h"
#include "mips-tdep.h"
-#include "gdb_string.h"
-#include "gdb_assert.h"
#include "frame.h"
+#include "regcache.h"
#include "trad-frame.h"
#include "tramp-frame.h"
-
-/* Copied from . */
-#define ELF_NGREG 45
-#define ELF_NFPREG 33
-
-typedef unsigned char elf_greg_t[4];
-typedef elf_greg_t elf_gregset_t[ELF_NGREG];
-
-typedef unsigned char elf_fpreg_t[8];
-typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
-
-/* 0 - 31 are integer registers, 32 - 63 are fp registers. */
-#define FPR_BASE 32
-#define PC 64
-#define CAUSE 65
-#define BADVADDR 66
-#define MMHI 67
-#define MMLO 68
-#define FPC_CSR 69
-#define FPC_EIR 70
-
-#define EF_REG0 6
-#define EF_REG31 37
-#define EF_LO 38
-#define EF_HI 39
-#define EF_CP0_EPC 40
-#define EF_CP0_BADVADDR 41
-#define EF_CP0_STATUS 42
-#define EF_CP0_CAUSE 43
-
-#define EF_SIZE 180
+#include "gdbtypes.h"
+#include "objfiles.h"
+#include "solib.h"
+#include "solist.h"
+#include "symtab.h"
+#include "target-descriptions.h"
+#include "regset.h"
+#include "mips-linux-tdep.h"
+#include "glibc-tdep.h"
+#include "linux-tdep.h"
+#include "xml-syscall.h"
+#include "gdb_signals.h"
+
+static struct target_so_ops mips_svr4_so_ops;
+
+/* This enum represents the signals' numbers on the MIPS
+ architecture. It just contains the signal definitions which are
+ different from the generic implementation.
+
+ It is derived from the file ,
+ from the Linux kernel tree. */
+
+enum
+ {
+ MIPS_LINUX_SIGEMT = 7,
+ MIPS_LINUX_SIGBUS = 10,
+ MIPS_LINUX_SIGSYS = 12,
+ MIPS_LINUX_SIGUSR1 = 16,
+ MIPS_LINUX_SIGUSR2 = 17,
+ MIPS_LINUX_SIGCHLD = 18,
+ MIPS_LINUX_SIGCLD = MIPS_LINUX_SIGCHLD,
+ MIPS_LINUX_SIGPWR = 19,
+ MIPS_LINUX_SIGWINCH = 20,
+ MIPS_LINUX_SIGURG = 21,
+ MIPS_LINUX_SIGIO = 22,
+ MIPS_LINUX_SIGPOLL = MIPS_LINUX_SIGIO,
+ MIPS_LINUX_SIGSTOP = 23,
+ MIPS_LINUX_SIGTSTP = 24,
+ MIPS_LINUX_SIGCONT = 25,
+ MIPS_LINUX_SIGTTIN = 26,
+ MIPS_LINUX_SIGTTOU = 27,
+ MIPS_LINUX_SIGVTALRM = 28,
+ MIPS_LINUX_SIGPROF = 29,
+ MIPS_LINUX_SIGXCPU = 30,
+ MIPS_LINUX_SIGXFSZ = 31,
+
+ MIPS_LINUX_SIGRTMIN = 32,
+ MIPS_LINUX_SIGRT64 = 64,
+ MIPS_LINUX_SIGRTMAX = 127,
+ };
/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from
- which we extract the pc (MIPS_LINUX_JB_PC) that we will land at. The pc
- is copied into PC. This routine returns 1 on success. */
+ We expect the first arg to be a pointer to the jmp_buf structure
+ from which we extract the pc (MIPS_LINUX_JB_PC) that we will land
+ at. The pc is copied into PC. This routine returns 1 on
+ success. */
#define MIPS_LINUX_JB_ELEMENT_SIZE 4
#define MIPS_LINUX_JB_PC 0
static int
-mips_linux_get_longjmp_target (CORE_ADDR *pc)
+mips_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT];
- jb_addr = read_register (MIPS_A0_REGNUM);
+ jb_addr = get_frame_register_unsigned (frame, MIPS_A0_REGNUM);
- if (target_read_memory (jb_addr
- + MIPS_LINUX_JB_PC * MIPS_LINUX_JB_ELEMENT_SIZE,
- buf, TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ if (target_read_memory ((jb_addr
+ + MIPS_LINUX_JB_PC * MIPS_LINUX_JB_ELEMENT_SIZE),
+ buf, gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT))
return 0;
- *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ *pc = extract_unsigned_integer (buf,
+ gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT,
+ byte_order);
return 1;
}
@@ -93,617 +114,601 @@ mips_linux_get_longjmp_target (CORE_ADDR *pc)
is 8. */
static void
-supply_32bit_reg (int regnum, const void *addr)
+supply_32bit_reg (struct regcache *regcache, int regnum, const void *addr)
{
- char buf[MAX_REGISTER_SIZE];
- store_signed_integer (buf, register_size (current_gdbarch, regnum),
- extract_signed_integer (addr, 4));
- regcache_raw_supply (current_regcache, regnum, buf);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ store_signed_integer (buf, register_size (gdbarch, regnum), byte_order,
+ extract_signed_integer (addr, 4, byte_order));
+ regcache_raw_supply (regcache, regnum, buf);
}
/* Unpack an elf_gregset_t into GDB's register cache. */
-void
-supply_gregset (elf_gregset_t *gregsetp)
+void
+mips_supply_gregset (struct regcache *regcache,
+ const mips_elf_gregset_t *gregsetp)
{
int regi;
- elf_greg_t *regp = *gregsetp;
+ const mips_elf_greg_t *regp = *gregsetp;
char zerobuf[MAX_REGISTER_SIZE];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
memset (zerobuf, 0, MAX_REGISTER_SIZE);
- for (regi = EF_REG0; regi <= EF_REG31; regi++)
- supply_32bit_reg ((regi - EF_REG0), (char *)(regp + regi));
-
- supply_32bit_reg (mips_regnum (current_gdbarch)->lo,
- (char *)(regp + EF_LO));
- supply_32bit_reg (mips_regnum (current_gdbarch)->hi,
- (char *)(regp + EF_HI));
-
- supply_32bit_reg (mips_regnum (current_gdbarch)->pc,
- (char *)(regp + EF_CP0_EPC));
- supply_32bit_reg (mips_regnum (current_gdbarch)->badvaddr,
- (char *)(regp + EF_CP0_BADVADDR));
- supply_32bit_reg (MIPS_PS_REGNUM, (char *)(regp + EF_CP0_STATUS));
- supply_32bit_reg (mips_regnum (current_gdbarch)->cause,
- (char *)(regp + EF_CP0_CAUSE));
-
- /* Fill inaccessible registers with zero. */
- regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
- for (regi = MIPS_FIRST_EMBED_REGNUM; regi < MIPS_LAST_EMBED_REGNUM; regi++)
- regcache_raw_supply (current_regcache, regi, zerobuf);
+ for (regi = EF_REG0 + 1; regi <= EF_REG31; regi++)
+ supply_32bit_reg (regcache, regi - EF_REG0, regp + regi);
+
+ if (mips_linux_restart_reg_p (gdbarch))
+ supply_32bit_reg (regcache, MIPS_RESTART_REGNUM, regp + EF_REG0);
+
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->lo, regp + EF_LO);
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->hi, regp + EF_HI);
+
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->pc,
+ regp + EF_CP0_EPC);
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->badvaddr,
+ regp + EF_CP0_BADVADDR);
+ supply_32bit_reg (regcache, MIPS_PS_REGNUM, regp + EF_CP0_STATUS);
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->cause,
+ regp + EF_CP0_CAUSE);
+
+ /* Fill the inaccessible zero register with zero. */
+ regcache_raw_supply (regcache, MIPS_ZERO_REGNUM, zerobuf);
+}
+
+static void
+mips_supply_gregset_wrapper (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ gdb_assert (len >= sizeof (mips_elf_gregset_t));
+
+ mips_supply_gregset (regcache, (const mips_elf_gregset_t *)gregs);
}
/* Pack our registers (or one register) into an elf_gregset_t. */
void
-fill_gregset (elf_gregset_t *gregsetp, int regno)
+mips_fill_gregset (const struct regcache *regcache,
+ mips_elf_gregset_t *gregsetp, int regno)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int regaddr, regi;
- elf_greg_t *regp = *gregsetp;
+ mips_elf_greg_t *regp = *gregsetp;
void *dst;
if (regno == -1)
{
- memset (regp, 0, sizeof (elf_gregset_t));
- for (regi = 0; regi < 32; regi++)
- fill_gregset (gregsetp, regi);
- fill_gregset (gregsetp, mips_regnum (current_gdbarch)->lo);
- fill_gregset (gregsetp, mips_regnum (current_gdbarch)->hi);
- fill_gregset (gregsetp, mips_regnum (current_gdbarch)->pc);
- fill_gregset (gregsetp, mips_regnum (current_gdbarch)->badvaddr);
- fill_gregset (gregsetp, MIPS_PS_REGNUM);
- fill_gregset (gregsetp, mips_regnum (current_gdbarch)->cause);
-
+ memset (regp, 0, sizeof (mips_elf_gregset_t));
+ for (regi = 1; regi < 32; regi++)
+ mips_fill_gregset (regcache, gregsetp, regi);
+ mips_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->lo);
+ mips_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->hi);
+ mips_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->pc);
+ mips_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->badvaddr);
+ mips_fill_gregset (regcache, gregsetp, MIPS_PS_REGNUM);
+ mips_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->cause);
+ mips_fill_gregset (regcache, gregsetp, MIPS_RESTART_REGNUM);
return;
}
- if (regno < 32)
+ if (regno > 0 && regno < 32)
{
dst = regp + regno + EF_REG0;
- regcache_raw_collect (current_regcache, regno, dst);
+ regcache_raw_collect (regcache, regno, dst);
return;
}
- if (regno == mips_regnum (current_gdbarch)->lo)
- regaddr = EF_LO;
- else if (regno == mips_regnum (current_gdbarch)->hi)
+ if (regno == mips_regnum (gdbarch)->lo)
+ regaddr = EF_LO;
+ else if (regno == mips_regnum (gdbarch)->hi)
regaddr = EF_HI;
- else if (regno == mips_regnum (current_gdbarch)->pc)
+ else if (regno == mips_regnum (gdbarch)->pc)
regaddr = EF_CP0_EPC;
- else if (regno == mips_regnum (current_gdbarch)->badvaddr)
+ else if (regno == mips_regnum (gdbarch)->badvaddr)
regaddr = EF_CP0_BADVADDR;
else if (regno == MIPS_PS_REGNUM)
regaddr = EF_CP0_STATUS;
- else if (regno == mips_regnum (current_gdbarch)->cause)
+ else if (regno == mips_regnum (gdbarch)->cause)
regaddr = EF_CP0_CAUSE;
+ else if (mips_linux_restart_reg_p (gdbarch)
+ && regno == MIPS_RESTART_REGNUM)
+ regaddr = EF_REG0;
else
regaddr = -1;
if (regaddr != -1)
{
dst = regp + regaddr;
- regcache_raw_collect (current_regcache, regno, dst);
+ regcache_raw_collect (regcache, regno, dst);
}
}
+static void
+mips_fill_gregset_wrapper (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ gdb_assert (len >= sizeof (mips_elf_gregset_t));
+
+ mips_fill_gregset (regcache, (mips_elf_gregset_t *)gregs, regnum);
+}
+
/* Likewise, unpack an elf_fpregset_t. */
void
-supply_fpregset (elf_fpregset_t *fpregsetp)
+mips_supply_fpregset (struct regcache *regcache,
+ const mips_elf_fpregset_t *fpregsetp)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int regi;
char zerobuf[MAX_REGISTER_SIZE];
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = 0; regi < 32; regi++)
- regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
- (char *)(*fpregsetp + regi));
+ regcache_raw_supply (regcache,
+ gdbarch_fp0_regnum (gdbarch) + regi,
+ *fpregsetp + regi);
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_control_status,
- (char *)(*fpregsetp + 32));
+ regcache_raw_supply (regcache,
+ mips_regnum (gdbarch)->fp_control_status,
+ *fpregsetp + 32);
- /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_implementation_revision,
+ /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
+ regcache_raw_supply (regcache,
+ mips_regnum (gdbarch)->fp_implementation_revision,
zerobuf);
}
+static void
+mips_supply_fpregset_wrapper (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ gdb_assert (len >= sizeof (mips_elf_fpregset_t));
+
+ mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *)gregs);
+}
+
/* Likewise, pack one or all floating point registers into an
elf_fpregset_t. */
void
-fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
+mips_fill_fpregset (const struct regcache *regcache,
+ mips_elf_fpregset_t *fpregsetp, int regno)
{
- char *from, *to;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ char *to;
- if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32))
+ if ((regno >= gdbarch_fp0_regnum (gdbarch))
+ && (regno < gdbarch_fp0_regnum (gdbarch) + 32))
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
- to = (char *) (*fpregsetp + regno - FP0_REGNUM);
- memcpy (to, from, register_size (current_gdbarch, regno - FP0_REGNUM));
+ to = (char *) (*fpregsetp + regno - gdbarch_fp0_regnum (gdbarch));
+ regcache_raw_collect (regcache, regno, to);
}
- else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
+ else if (regno == mips_regnum (gdbarch)->fp_control_status)
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
to = (char *) (*fpregsetp + 32);
- memcpy (to, from, register_size (current_gdbarch, regno));
+ regcache_raw_collect (regcache, regno, to);
}
else if (regno == -1)
{
int regi;
for (regi = 0; regi < 32; regi++)
- fill_fpregset (fpregsetp, FP0_REGNUM + regi);
- fill_fpregset(fpregsetp, mips_regnum (current_gdbarch)->fp_control_status);
+ mips_fill_fpregset (regcache, fpregsetp,
+ gdbarch_fp0_regnum (gdbarch) + regi);
+ mips_fill_fpregset (regcache, fpregsetp,
+ mips_regnum (gdbarch)->fp_control_status);
}
}
-/* Map gdb internal register number to ptrace ``address''.
- These ``addresses'' are normally defined in . */
-
-static CORE_ADDR
-mips_linux_register_addr (int regno, CORE_ADDR blockend)
+static void
+mips_fill_fpregset_wrapper (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
{
- int regaddr;
-
- if (regno < 0 || regno >= NUM_REGS)
- error ("Bogon register number %d.", regno);
-
- if (regno < 32)
- regaddr = regno;
- else if ((regno >= mips_regnum (current_gdbarch)->fp0)
- && (regno < mips_regnum (current_gdbarch)->fp0 + 32))
- regaddr = FPR_BASE + (regno - mips_regnum (current_gdbarch)->fp0);
- else if (regno == mips_regnum (current_gdbarch)->pc)
- regaddr = PC;
- else if (regno == mips_regnum (current_gdbarch)->cause)
- regaddr = CAUSE;
- else if (regno == mips_regnum (current_gdbarch)->badvaddr)
- regaddr = BADVADDR;
- else if (regno == mips_regnum (current_gdbarch)->lo)
- regaddr = MMLO;
- else if (regno == mips_regnum (current_gdbarch)->hi)
- regaddr = MMHI;
- else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
- regaddr = FPC_CSR;
- else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
- regaddr = FPC_EIR;
- else
- error ("Unknowable register number %d.", regno);
-
- return regaddr;
-}
-
-
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native GNU/Linux MIPS targets using the struct offsets
- defined in link.h (but without actual reference to that file).
-
- This makes it possible to access GNU/Linux MIPS shared libraries from a
- GDB that was built on a different host platform (for cross debugging). */
+ gdb_assert (len >= sizeof (mips_elf_fpregset_t));
-static struct link_map_offsets *
-mips_linux_svr4_fetch_link_map_offsets (void)
-{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
-
- if (lmp == NULL)
- {
- lmp = &lmo;
-
- 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;
-
- lmo.link_map_size = 20;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
-
- lmo.l_name_offset = 4;
- lmo.l_name_size = 4;
-
- lmo.l_next_offset = 12;
- lmo.l_next_size = 4;
-
- lmo.l_prev_offset = 16;
- lmo.l_prev_size = 4;
- }
-
- return lmp;
+ mips_fill_fpregset (regcache, (mips_elf_fpregset_t *)gregs, regnum);
}
/* Support for 64-bit ABIs. */
-/* Copied from . */
-#define MIPS64_ELF_NGREG 45
-#define MIPS64_ELF_NFPREG 33
-
-typedef unsigned char mips64_elf_greg_t[8];
-typedef mips64_elf_greg_t mips64_elf_gregset_t[MIPS64_ELF_NGREG];
-
-typedef unsigned char mips64_elf_fpreg_t[8];
-typedef mips64_elf_fpreg_t mips64_elf_fpregset_t[MIPS64_ELF_NFPREG];
-
-/* 0 - 31 are integer registers, 32 - 63 are fp registers. */
-#define MIPS64_FPR_BASE 32
-#define MIPS64_PC 64
-#define MIPS64_CAUSE 65
-#define MIPS64_BADVADDR 66
-#define MIPS64_MMHI 67
-#define MIPS64_MMLO 68
-#define MIPS64_FPC_CSR 69
-#define MIPS64_FPC_EIR 70
-
-#define MIPS64_EF_REG0 0
-#define MIPS64_EF_REG31 31
-#define MIPS64_EF_LO 32
-#define MIPS64_EF_HI 33
-#define MIPS64_EF_CP0_EPC 34
-#define MIPS64_EF_CP0_BADVADDR 35
-#define MIPS64_EF_CP0_STATUS 36
-#define MIPS64_EF_CP0_CAUSE 37
-
-#define MIPS64_EF_SIZE 304
-
/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from
- which we extract the pc (MIPS_LINUX_JB_PC) that we will land at. The pc
- is copied into PC. This routine returns 1 on success. */
+ We expect the first arg to be a pointer to the jmp_buf structure
+ from which we extract the pc (MIPS_LINUX_JB_PC) that we will land
+ at. The pc is copied into PC. This routine returns 1 on
+ success. */
/* Details about jmp_buf. */
#define MIPS64_LINUX_JB_PC 0
static int
-mips64_linux_get_longjmp_target (CORE_ADDR *pc)
+mips64_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
- void *buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
- int element_size = TARGET_PTR_BIT == 32 ? 4 : 8;
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ void *buf = alloca (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
+ int element_size = gdbarch_ptr_bit (gdbarch) == 32 ? 4 : 8;
- jb_addr = read_register (MIPS_A0_REGNUM);
+ jb_addr = get_frame_register_unsigned (frame, MIPS_A0_REGNUM);
if (target_read_memory (jb_addr + MIPS64_LINUX_JB_PC * element_size,
- buf, TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ buf,
+ gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT))
return 0;
- *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ *pc = extract_unsigned_integer (buf,
+ gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT,
+ byte_order);
return 1;
}
-/* Unpack an elf_gregset_t into GDB's register cache. */
+/* Register set support functions. These operate on standard 64-bit
+ regsets, but work whether the target is 32-bit or 64-bit. A 32-bit
+ target will still use the 64-bit format for PTRACE_GETREGS. */
-static void
-mips64_supply_gregset (mips64_elf_gregset_t *gregsetp)
+/* Supply a 64-bit register. */
+
+static void
+supply_64bit_reg (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
+ && register_size (gdbarch, regnum) == 4)
+ regcache_raw_supply (regcache, regnum, buf + 4);
+ else
+ regcache_raw_supply (regcache, regnum, buf);
+}
+
+/* Unpack a 64-bit elf_gregset_t into GDB's register cache. */
+
+void
+mips64_supply_gregset (struct regcache *regcache,
+ const mips64_elf_gregset_t *gregsetp)
{
int regi;
- mips64_elf_greg_t *regp = *gregsetp;
- char zerobuf[MAX_REGISTER_SIZE];
+ const mips64_elf_greg_t *regp = *gregsetp;
+ gdb_byte zerobuf[MAX_REGISTER_SIZE];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
memset (zerobuf, 0, MAX_REGISTER_SIZE);
- for (regi = MIPS64_EF_REG0; regi <= MIPS64_EF_REG31; regi++)
- regcache_raw_supply (current_regcache, (regi - MIPS64_EF_REG0),
- (char *)(regp + regi));
-
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
- (char *)(regp + MIPS64_EF_LO));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
- (char *)(regp + MIPS64_EF_HI));
-
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
- (char *)(regp + MIPS64_EF_CP0_EPC));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->badvaddr,
- (char *)(regp + MIPS64_EF_CP0_BADVADDR));
- regcache_raw_supply (current_regcache, MIPS_PS_REGNUM,
- (char *)(regp + MIPS64_EF_CP0_STATUS));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
- (char *)(regp + MIPS64_EF_CP0_CAUSE));
-
- /* Fill inaccessible registers with zero. */
- regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
- for (regi = MIPS_FIRST_EMBED_REGNUM; regi < MIPS_LAST_EMBED_REGNUM; regi++)
- regcache_raw_supply (current_regcache, regi, zerobuf);
+ for (regi = MIPS64_EF_REG0 + 1; regi <= MIPS64_EF_REG31; regi++)
+ supply_64bit_reg (regcache, regi - MIPS64_EF_REG0,
+ (const gdb_byte *) (regp + regi));
+
+ if (mips_linux_restart_reg_p (gdbarch))
+ supply_64bit_reg (regcache, MIPS_RESTART_REGNUM,
+ (const gdb_byte *) (regp + MIPS64_EF_REG0));
+
+ supply_64bit_reg (regcache, mips_regnum (gdbarch)->lo,
+ (const gdb_byte *) (regp + MIPS64_EF_LO));
+ supply_64bit_reg (regcache, mips_regnum (gdbarch)->hi,
+ (const gdb_byte *) (regp + MIPS64_EF_HI));
+
+ supply_64bit_reg (regcache, mips_regnum (gdbarch)->pc,
+ (const gdb_byte *) (regp + MIPS64_EF_CP0_EPC));
+ supply_64bit_reg (regcache, mips_regnum (gdbarch)->badvaddr,
+ (const gdb_byte *) (regp + MIPS64_EF_CP0_BADVADDR));
+ supply_64bit_reg (regcache, MIPS_PS_REGNUM,
+ (const gdb_byte *) (regp + MIPS64_EF_CP0_STATUS));
+ supply_64bit_reg (regcache, mips_regnum (gdbarch)->cause,
+ (const gdb_byte *) (regp + MIPS64_EF_CP0_CAUSE));
+
+ /* Fill the inaccessible zero register with zero. */
+ regcache_raw_supply (regcache, MIPS_ZERO_REGNUM, zerobuf);
}
-/* Pack our registers (or one register) into an elf_gregset_t. */
-
static void
-mips64_fill_gregset (mips64_elf_gregset_t *gregsetp, int regno)
+mips64_supply_gregset_wrapper (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
+ gdb_assert (len >= sizeof (mips64_elf_gregset_t));
+
+ mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *)gregs);
+}
+
+/* Pack our registers (or one register) into a 64-bit elf_gregset_t. */
+
+void
+mips64_fill_gregset (const struct regcache *regcache,
+ mips64_elf_gregset_t *gregsetp, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int regaddr, regi;
mips64_elf_greg_t *regp = *gregsetp;
- void *src, *dst;
+ void *dst;
if (regno == -1)
{
memset (regp, 0, sizeof (mips64_elf_gregset_t));
- for (regi = 0; regi < 32; regi++)
- mips64_fill_gregset (gregsetp, regi);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->lo);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->hi);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->pc);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->badvaddr);
- mips64_fill_gregset (gregsetp, MIPS_PS_REGNUM);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->cause);
-
+ for (regi = 1; regi < 32; regi++)
+ mips64_fill_gregset (regcache, gregsetp, regi);
+ mips64_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->lo);
+ mips64_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->hi);
+ mips64_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->pc);
+ mips64_fill_gregset (regcache, gregsetp,
+ mips_regnum (gdbarch)->badvaddr);
+ mips64_fill_gregset (regcache, gregsetp, MIPS_PS_REGNUM);
+ mips64_fill_gregset (regcache, gregsetp, mips_regnum (gdbarch)->cause);
+ mips64_fill_gregset (regcache, gregsetp, MIPS_RESTART_REGNUM);
return;
}
- if (regno < 32)
- {
- dst = regp + regno + MIPS64_EF_REG0;
- regcache_raw_collect (current_regcache, regno, dst);
- return;
- }
-
- if (regno == mips_regnum (current_gdbarch)->lo)
+ if (regno > 0 && regno < 32)
+ regaddr = regno + MIPS64_EF_REG0;
+ else if (regno == mips_regnum (gdbarch)->lo)
regaddr = MIPS64_EF_LO;
- else if (regno == mips_regnum (current_gdbarch)->hi)
+ else if (regno == mips_regnum (gdbarch)->hi)
regaddr = MIPS64_EF_HI;
- else if (regno == mips_regnum (current_gdbarch)->pc)
+ else if (regno == mips_regnum (gdbarch)->pc)
regaddr = MIPS64_EF_CP0_EPC;
- else if (regno == mips_regnum (current_gdbarch)->badvaddr)
+ else if (regno == mips_regnum (gdbarch)->badvaddr)
regaddr = MIPS64_EF_CP0_BADVADDR;
else if (regno == MIPS_PS_REGNUM)
regaddr = MIPS64_EF_CP0_STATUS;
- else if (regno == mips_regnum (current_gdbarch)->cause)
+ else if (regno == mips_regnum (gdbarch)->cause)
regaddr = MIPS64_EF_CP0_CAUSE;
+ else if (mips_linux_restart_reg_p (gdbarch)
+ && regno == MIPS_RESTART_REGNUM)
+ regaddr = MIPS64_EF_REG0;
else
regaddr = -1;
if (regaddr != -1)
{
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ LONGEST val;
+
+ regcache_raw_collect (regcache, regno, buf);
+ val = extract_signed_integer (buf, register_size (gdbarch, regno),
+ byte_order);
dst = regp + regaddr;
- regcache_raw_collect (current_regcache, regno, dst);
+ store_signed_integer (dst, 8, byte_order, val);
}
}
+static void
+mips64_fill_gregset_wrapper (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ gdb_assert (len >= sizeof (mips64_elf_gregset_t));
+
+ mips64_fill_gregset (regcache, (mips64_elf_gregset_t *)gregs, regnum);
+}
+
/* Likewise, unpack an elf_fpregset_t. */
-static void
-mips64_supply_fpregset (mips64_elf_fpregset_t *fpregsetp)
+void
+mips64_supply_fpregset (struct regcache *regcache,
+ const mips64_elf_fpregset_t *fpregsetp)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int regi;
- char zerobuf[MAX_REGISTER_SIZE];
- memset (zerobuf, 0, MAX_REGISTER_SIZE);
-
- for (regi = 0; regi < 32; regi++)
- regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
- (char *)(*fpregsetp + regi));
+ /* See mips_linux_o32_sigframe_init for a description of the
+ peculiar FP register layout. */
+ if (register_size (gdbarch, gdbarch_fp0_regnum (gdbarch)) == 4)
+ for (regi = 0; regi < 32; regi++)
+ {
+ const gdb_byte *reg_ptr
+ = (const gdb_byte *) (*fpregsetp + (regi & ~1));
+ if ((gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) != (regi & 1))
+ reg_ptr += 4;
+ regcache_raw_supply (regcache,
+ gdbarch_fp0_regnum (gdbarch) + regi,
+ reg_ptr);
+ }
+ else
+ for (regi = 0; regi < 32; regi++)
+ regcache_raw_supply (regcache,
+ gdbarch_fp0_regnum (gdbarch) + regi,
+ (const char *) (*fpregsetp + regi));
+
+ supply_32bit_reg (regcache, mips_regnum (gdbarch)->fp_control_status,
+ (const gdb_byte *) (*fpregsetp + 32));
+
+ /* The ABI doesn't tell us how to supply FCRIR, and core dumps don't
+ include it - but the result of PTRACE_GETFPREGS does. The best we
+ can do is to assume that its value is present. */
+ supply_32bit_reg (regcache,
+ mips_regnum (gdbarch)->fp_implementation_revision,
+ (const gdb_byte *) (*fpregsetp + 32) + 4);
+}
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_control_status,
- (char *)(*fpregsetp + 32));
+static void
+mips64_supply_fpregset_wrapper (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ gdb_assert (len >= sizeof (mips64_elf_fpregset_t));
- /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_implementation_revision,
- zerobuf);
+ mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *)gregs);
}
/* Likewise, pack one or all floating point registers into an
elf_fpregset_t. */
-static void
-mips64_fill_fpregset (mips64_elf_fpregset_t *fpregsetp, int regno)
+void
+mips64_fill_fpregset (const struct regcache *regcache,
+ mips64_elf_fpregset_t *fpregsetp, int regno)
{
- char *from, *to;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte *to;
- if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32))
+ if ((regno >= gdbarch_fp0_regnum (gdbarch))
+ && (regno < gdbarch_fp0_regnum (gdbarch) + 32))
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
- to = (char *) (*fpregsetp + regno - FP0_REGNUM);
- memcpy (to, from, register_size (current_gdbarch, regno - FP0_REGNUM));
+ /* See mips_linux_o32_sigframe_init for a description of the
+ peculiar FP register layout. */
+ if (register_size (gdbarch, regno) == 4)
+ {
+ int regi = regno - gdbarch_fp0_regnum (gdbarch);
+
+ to = (gdb_byte *) (*fpregsetp + (regi & ~1));
+ if ((gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) != (regi & 1))
+ to += 4;
+ regcache_raw_collect (regcache, regno, to);
+ }
+ else
+ {
+ to = (gdb_byte *) (*fpregsetp + regno
+ - gdbarch_fp0_regnum (gdbarch));
+ regcache_raw_collect (regcache, regno, to);
+ }
}
- else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
+ else if (regno == mips_regnum (gdbarch)->fp_control_status)
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
- to = (char *) (*fpregsetp + 32);
- memcpy (to, from, register_size (current_gdbarch, regno));
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ LONGEST val;
+
+ regcache_raw_collect (regcache, regno, buf);
+ val = extract_signed_integer (buf, register_size (gdbarch, regno),
+ byte_order);
+ to = (gdb_byte *) (*fpregsetp + 32);
+ store_signed_integer (to, 4, byte_order, val);
+ }
+ else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
+ {
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ LONGEST val;
+
+ regcache_raw_collect (regcache, regno, buf);
+ val = extract_signed_integer (buf, register_size (gdbarch, regno),
+ byte_order);
+ to = (gdb_byte *) (*fpregsetp + 32) + 4;
+ store_signed_integer (to, 4, byte_order, val);
}
else if (regno == -1)
{
int regi;
for (regi = 0; regi < 32; regi++)
- mips64_fill_fpregset (fpregsetp, FP0_REGNUM + regi);
- mips64_fill_fpregset(fpregsetp,
- mips_regnum (current_gdbarch)->fp_control_status);
+ mips64_fill_fpregset (regcache, fpregsetp,
+ gdbarch_fp0_regnum (gdbarch) + regi);
+ mips64_fill_fpregset (regcache, fpregsetp,
+ mips_regnum (gdbarch)->fp_control_status);
+ mips64_fill_fpregset (regcache, fpregsetp,
+ mips_regnum (gdbarch)->fp_implementation_revision);
}
}
-
-/* Map gdb internal register number to ptrace ``address''.
- These ``addresses'' are normally defined in . */
-
-static CORE_ADDR
-mips64_linux_register_addr (int regno, CORE_ADDR blockend)
+static void
+mips64_fill_fpregset_wrapper (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
{
- int regaddr;
-
- if (regno < 0 || regno >= NUM_REGS)
- error ("Bogon register number %d.", regno);
-
- if (regno < 32)
- regaddr = regno;
- else if ((regno >= mips_regnum (current_gdbarch)->fp0)
- && (regno < mips_regnum (current_gdbarch)->fp0 + 32))
- regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM);
- else if (regno == mips_regnum (current_gdbarch)->pc)
- regaddr = MIPS64_PC;
- else if (regno == mips_regnum (current_gdbarch)->cause)
- regaddr = MIPS64_CAUSE;
- else if (regno == mips_regnum (current_gdbarch)->badvaddr)
- regaddr = MIPS64_BADVADDR;
- else if (regno == mips_regnum (current_gdbarch)->lo)
- regaddr = MIPS64_MMLO;
- else if (regno == mips_regnum (current_gdbarch)->hi)
- regaddr = MIPS64_MMHI;
- else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
- regaddr = MIPS64_FPC_CSR;
- else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
- regaddr = MIPS64_FPC_EIR;
- else
- error ("Unknowable register number %d.", regno);
+ gdb_assert (len >= sizeof (mips64_elf_fpregset_t));
- return regaddr;
+ mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *)gregs, regnum);
}
-/* Use a local version of this function to get the correct types for
- regsets, until multi-arch core support is ready. */
+static const struct regset mips_linux_gregset =
+ {
+ NULL, mips_supply_gregset_wrapper, mips_fill_gregset_wrapper
+ };
+
+static const struct regset mips64_linux_gregset =
+ {
+ NULL, mips64_supply_gregset_wrapper, mips64_fill_gregset_wrapper
+ };
+
+static const struct regset mips_linux_fpregset =
+ {
+ NULL, mips_supply_fpregset_wrapper, mips_fill_fpregset_wrapper
+ };
+
+static const struct regset mips64_linux_fpregset =
+ {
+ NULL, mips64_supply_fpregset_wrapper, mips64_fill_fpregset_wrapper
+ };
static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR reg_addr)
+mips_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
{
- elf_gregset_t gregset;
- elf_fpregset_t fpregset;
- mips64_elf_gregset_t gregset64;
- mips64_elf_fpregset_t fpregset64;
-
- if (which == 0)
+ if (register_size (gdbarch, MIPS_ZERO_REGNUM) == 4)
{
- if (core_reg_size == sizeof (gregset))
- {
- memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset));
- supply_gregset (&gregset);
- }
- else if (core_reg_size == sizeof (gregset64))
- {
- memcpy ((char *) &gregset64, core_reg_sect, sizeof (gregset64));
- mips64_supply_gregset (&gregset64);
- }
- else
- {
- warning ("wrong size gregset struct in core file");
- }
+ cb (".reg", sizeof (mips_elf_gregset_t), &mips_linux_gregset,
+ NULL, cb_data);
+ cb (".reg2", sizeof (mips_elf_fpregset_t), &mips_linux_fpregset,
+ NULL, cb_data);
}
- else if (which == 2)
+ else
{
- if (core_reg_size == sizeof (fpregset))
- {
- memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset));
- supply_fpregset (&fpregset);
- }
- else if (core_reg_size == sizeof (fpregset64))
- {
- memcpy ((char *) &fpregset64, core_reg_sect, sizeof (fpregset64));
- mips64_supply_fpregset (&fpregset64);
- }
- else
- {
- warning ("wrong size fpregset struct in core file");
- }
+ cb (".reg", sizeof (mips64_elf_gregset_t), &mips64_linux_gregset,
+ NULL, cb_data);
+ cb (".reg2", sizeof (mips64_elf_fpregset_t), &mips64_linux_fpregset,
+ NULL, cb_data);
}
}
-/* Register that we are able to handle ELF file formats using standard
- procfs "regset" structures. */
-
-static struct core_fns regset_core_fns =
+static const struct target_desc *
+mips_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native GNU/Linux MIPS targets using the struct offsets
- defined in link.h (but without actual reference to that file).
-
- This makes it possible to access GNU/Linux MIPS shared libraries from a
- GDB that was built on a different host platform (for cross debugging). */
-
-static struct link_map_offsets *
-mips64_linux_svr4_fetch_link_map_offsets (void)
-{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
+ asection *section = bfd_get_section_by_name (abfd, ".reg");
+ if (! section)
+ return NULL;
- if (lmp == NULL)
- {
- lmp = &lmo;
-
- lmo.r_debug_size = 16; /* The actual size is 40 bytes, but
- this is all we need. */
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
-
- lmo.link_map_size = 40;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
-
- lmo.l_name_offset = 8;
- lmo.l_name_size = 8;
+ switch (bfd_section_size (abfd, section))
+ {
+ case sizeof (mips_elf_gregset_t):
+ return mips_tdesc_gp32;
- lmo.l_next_offset = 24;
- lmo.l_next_size = 8;
+ case sizeof (mips64_elf_gregset_t):
+ return mips_tdesc_gp64;
- lmo.l_prev_offset = 32;
- lmo.l_prev_size = 8;
+ default:
+ return NULL;
}
-
- return lmp;
-}
-
-/* Handle for obtaining pointer to the current register_addr() function
- for a given architecture. */
-static struct gdbarch_data *register_addr_data;
-
-CORE_ADDR
-register_addr (int regno, CORE_ADDR blockend)
-{
- CORE_ADDR (*register_addr_ptr) (int, CORE_ADDR) =
- gdbarch_data (current_gdbarch, register_addr_data);
-
- gdb_assert (register_addr_ptr != 0);
-
- return register_addr_ptr (regno, blockend);
}
-static void
-set_mips_linux_register_addr (struct gdbarch *gdbarch,
- CORE_ADDR (*register_addr_ptr) (int, CORE_ADDR))
-{
- deprecated_set_gdbarch_data (gdbarch, register_addr_data, register_addr_ptr);
-}
-static void *
-init_register_addr_data (struct gdbarch *gdbarch)
-{
- return 0;
-}
-
-/* Check the code at PC for a dynamic linker lazy resolution stub. Because
- they aren't in the .plt section, we pattern-match on the code generated
- by GNU ld. They look like this:
+/* Check the code at PC for a dynamic linker lazy resolution stub.
+ GNU ld for MIPS has put lazy resolution stubs into a ".MIPS.stubs"
+ section uniformly since version 2.15. If the pc is in that section,
+ then we are in such a stub. Before that ".stub" was used in 32-bit
+ ELF binaries, however we do not bother checking for that since we
+ have never had and that case should be extremely rare these days.
+ Instead we pattern-match on the code generated by GNU ld. They look
+ like this:
lw t9,0x8010(gp)
addu t7,ra
jalr t9,ra
addiu t8,zero,INDEX
- (with the appropriate doubleword instructions for N64). Also return the
- dynamic symbol index used in the last instruction. */
+ (with the appropriate doubleword instructions for N64). As any lazy
+ resolution stubs in microMIPS binaries will always be in a
+ ".MIPS.stubs" section we only ever verify standard MIPS patterns. */
static int
-mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
+mips_linux_in_dynsym_stub (CORE_ADDR pc)
{
- unsigned char buf[28], *p;
+ gdb_byte buf[28], *p;
ULONGEST insn, insn1;
- int n64 = (mips_abi (current_gdbarch) == MIPS_ABI_N64);
+ int n64 = (mips_abi (target_gdbarch ()) == MIPS_ABI_N64);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
+
+ if (in_mips_stubs_section (pc))
+ return 1;
read_memory (pc - 12, buf, 28);
@@ -721,7 +726,7 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
p = buf + 12;
while (p >= buf)
{
- insn = extract_unsigned_integer (p, 4);
+ insn = extract_unsigned_integer (p, 4, byte_order);
if (insn == insn1)
break;
p -= 4;
@@ -729,7 +734,7 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
if (p < buf)
return 0;
- insn = extract_unsigned_integer (p + 4, 4);
+ insn = extract_unsigned_integer (p + 4, 4, byte_order);
if (n64)
{
/* daddu t7,ra */
@@ -742,13 +747,13 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
if (insn != 0x03e07821)
return 0;
}
-
- insn = extract_unsigned_integer (p + 8, 4);
+
+ insn = extract_unsigned_integer (p + 8, 4, byte_order);
/* jalr t9,ra */
if (insn != 0x0320f809)
return 0;
- insn = extract_unsigned_integer (p + 12, 4);
+ insn = extract_unsigned_integer (p + 12, 4, byte_order);
if (n64)
{
/* daddiu t8,zero,0 */
@@ -762,23 +767,24 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
return 0;
}
- return (insn & 0xffff);
+ return 1;
}
-/* Return non-zero iff PC belongs to the dynamic linker resolution code
- or to a stub. */
+/* Return non-zero iff PC belongs to the dynamic linker resolution
+ code, a PLT entry, or a lazy binding stub. */
-int
+static int
mips_linux_in_dynsym_resolve_code (CORE_ADDR pc)
{
- /* Check whether PC is in the dynamic linker. This also checks whether
- it is in the .plt section, which MIPS does not use. */
- if (in_solib_dynsym_resolve_code (pc))
+ /* 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;
- /* Pattern match for the stub. It would be nice if there were a more
- efficient way to avoid this check. */
- if (mips_linux_in_dynsym_stub (pc, NULL))
+ /* Likewise for the stubs. They live in the .MIPS.stubs section these
+ days, so we check if the PC is within, than fall back to a pattern
+ match. */
+ if (mips_linux_in_dynsym_stub (pc))
return 1;
return 0;
@@ -788,23 +794,23 @@ mips_linux_in_dynsym_resolve_code (CORE_ADDR pc)
and glibc_skip_solib_resolver in glibc-tdep.c. The normal glibc
implementation of this triggers at "fixup" from the same objfile as
"_dl_runtime_resolve"; MIPS GNU/Linux can trigger at
- "__dl_runtime_resolve" directly. An unresolved PLT entry will
- point to _dl_runtime_resolve, which will first call
+ "__dl_runtime_resolve" directly. An unresolved lazy binding
+ stub will point to _dl_runtime_resolve, which will first call
__dl_runtime_resolve, and then pass control to the resolved
function. */
static CORE_ADDR
mips_linux_skip_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- struct minimal_symbol *resolver;
+ struct bound_minimal_symbol resolver;
resolver = lookup_minimal_symbol ("__dl_runtime_resolve", NULL, NULL);
- if (resolver && SYMBOL_VALUE_ADDRESS (resolver) == pc)
- return frame_pc_unwind (get_current_frame ());
+ if (resolver.minsym && BMSYMBOL_VALUE_ADDRESS (resolver) == pc)
+ return frame_unwind_caller_pc (get_current_frame ());
- return 0;
-}
+ return glibc_skip_solib_resolver (gdbarch, pc);
+}
/* Signal trampoline support. There are four supported layouts for a
signal frame: o32 sigframe, o32 rt_sigframe, n32 rt_sigframe, and
@@ -812,15 +818,23 @@ mips_linux_skip_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
efficient way, but simplest. First, declare all the unwinders. */
static void mips_linux_o32_sigframe_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);
static void mips_linux_n32n64_sigframe_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);
+static int mips_linux_sigframe_validate (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ CORE_ADDR *pc);
+
+static int micromips_linux_sigframe_validate (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ CORE_ADDR *pc);
+
#define MIPS_NR_LINUX 4000
#define MIPS_NR_N64_LINUX 5000
#define MIPS_NR_N32_LINUX 6000
@@ -836,6 +850,10 @@ static void mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
#define MIPS_INST_LI_V0_N32_RT_SIGRETURN 0x24020000 + MIPS_NR_N32_rt_sigreturn
#define MIPS_INST_SYSCALL 0x0000000c
+#define MICROMIPS_INST_LI_V0 0x3040
+#define MICROMIPS_INST_POOL32A 0x0000
+#define MICROMIPS_INST_SYSCALL 0x8b7c
+
static const struct tramp_frame mips_linux_o32_sigframe = {
SIGTRAMP_FRAME,
4,
@@ -844,7 +862,8 @@ static const struct tramp_frame mips_linux_o32_sigframe = {
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 }
},
- mips_linux_o32_sigframe_init
+ mips_linux_o32_sigframe_init,
+ mips_linux_sigframe_validate
};
static const struct tramp_frame mips_linux_o32_rt_sigframe = {
@@ -854,7 +873,8 @@ static const struct tramp_frame mips_linux_o32_rt_sigframe = {
{ MIPS_INST_LI_V0_RT_SIGRETURN, -1 },
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 } },
- mips_linux_o32_sigframe_init
+ mips_linux_o32_sigframe_init,
+ mips_linux_sigframe_validate
};
static const struct tramp_frame mips_linux_n32_rt_sigframe = {
@@ -865,14 +885,76 @@ static const struct tramp_frame mips_linux_n32_rt_sigframe = {
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 }
},
- mips_linux_n32n64_sigframe_init
+ mips_linux_n32n64_sigframe_init,
+ mips_linux_sigframe_validate
};
static const struct tramp_frame mips_linux_n64_rt_sigframe = {
SIGTRAMP_FRAME,
4,
- { MIPS_INST_LI_V0_N64_RT_SIGRETURN, MIPS_INST_SYSCALL, TRAMP_SENTINEL_INSN },
- mips_linux_n32n64_sigframe_init
+ {
+ { MIPS_INST_LI_V0_N64_RT_SIGRETURN, -1 },
+ { MIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_n32n64_sigframe_init,
+ mips_linux_sigframe_validate
+};
+
+static const struct tramp_frame micromips_linux_o32_sigframe = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { MICROMIPS_INST_LI_V0, -1 },
+ { MIPS_NR_sigreturn, -1 },
+ { MICROMIPS_INST_POOL32A, -1 },
+ { MICROMIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_o32_sigframe_init,
+ micromips_linux_sigframe_validate
+};
+
+static const struct tramp_frame micromips_linux_o32_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { MICROMIPS_INST_LI_V0, -1 },
+ { MIPS_NR_rt_sigreturn, -1 },
+ { MICROMIPS_INST_POOL32A, -1 },
+ { MICROMIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_o32_sigframe_init,
+ micromips_linux_sigframe_validate
+};
+
+static const struct tramp_frame micromips_linux_n32_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { MICROMIPS_INST_LI_V0, -1 },
+ { MIPS_NR_N32_rt_sigreturn, -1 },
+ { MICROMIPS_INST_POOL32A, -1 },
+ { MICROMIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_n32n64_sigframe_init,
+ micromips_linux_sigframe_validate
+};
+
+static const struct tramp_frame micromips_linux_n64_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { MICROMIPS_INST_LI_V0, -1 },
+ { MIPS_NR_N64_rt_sigreturn, -1 },
+ { MICROMIPS_INST_POOL32A, -1 },
+ { MICROMIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_n32n64_sigframe_init,
+ micromips_linux_sigframe_validate
};
/* *INDENT-OFF* */
@@ -881,11 +963,13 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
struct sigframe {
u32 sf_ass[4]; [argument save space for o32]
- u32 sf_code[2]; [signal trampoline]
+ u32 sf_code[2]; [signal trampoline or fill]
struct sigcontext sf_sc;
sigset_t sf_mask;
};
+ Pre-2.6.12 sigcontext:
+
struct sigcontext {
unsigned int sc_regmask; [Unused]
unsigned int sc_status;
@@ -907,11 +991,35 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
unsigned long sc_sigset[4]; [kernel's sigset_t]
};
+ Post-2.6.12 sigcontext (SmartMIPS/DSP support added):
+
+ struct sigcontext {
+ unsigned int sc_regmask; [Unused]
+ unsigned int sc_status; [Unused]
+ unsigned long long sc_pc;
+ unsigned long long sc_regs[32];
+ unsigned long long sc_fpregs[32];
+ unsigned int sc_acx;
+ unsigned int sc_fpc_csr;
+ unsigned int sc_fpc_eir; [Unused]
+ unsigned int sc_used_math;
+ unsigned int sc_dsp;
+ [Alignment hole of four bytes]
+ unsigned long long sc_mdhi;
+ unsigned long long sc_mdlo;
+ unsigned long sc_hi1;
+ unsigned long sc_lo1;
+ unsigned long sc_hi2;
+ unsigned long sc_lo2;
+ unsigned long sc_hi3;
+ unsigned long sc_lo3;
+ };
+
The RT signal frames look like this:
struct rt_sigframe {
u32 rs_ass[4]; [argument save space for o32]
- u32 rs_code[2] [signal trampoline]
+ u32 rs_code[2] [signal trampoline or fill]
struct siginfo rs_info;
struct ucontext rs_uc;
};
@@ -926,7 +1034,6 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
}; */
/* *INDENT-ON* */
-#define SIGFRAME_CODE_OFFSET (4 * 4)
#define SIGFRAME_SIGCONTEXT_OFFSET (6 * 4)
#define RTSIGFRAME_SIGINFO_SIZE 128
@@ -940,67 +1047,136 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
#define SIGCONTEXT_REGS (2 * 8)
#define SIGCONTEXT_FPREGS (34 * 8)
#define SIGCONTEXT_FPCSR (66 * 8 + 4)
+#define SIGCONTEXT_DSPCTL (68 * 8 + 0)
#define SIGCONTEXT_HI (69 * 8)
#define SIGCONTEXT_LO (70 * 8)
#define SIGCONTEXT_CAUSE (71 * 8 + 0)
#define SIGCONTEXT_BADVADDR (71 * 8 + 4)
+#define SIGCONTEXT_HI1 (71 * 8 + 0)
+#define SIGCONTEXT_LO1 (71 * 8 + 4)
+#define SIGCONTEXT_HI2 (72 * 8 + 0)
+#define SIGCONTEXT_LO2 (72 * 8 + 4)
+#define SIGCONTEXT_HI3 (73 * 8 + 0)
+#define SIGCONTEXT_LO3 (73 * 8 + 4)
#define SIGCONTEXT_REG_SIZE 8
static void
mips_linux_o32_sigframe_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)
{
- int ireg, reg_position;
- CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
- const struct mips_regnum *regs = mips_regnum (current_gdbarch);
-
- if (self == &mips_linux_o32_sigframe)
- sigcontext_base += SIGFRAME_SIGCONTEXT_OFFSET;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ int ireg;
+ CORE_ADDR frame_sp = get_frame_sp (this_frame);
+ CORE_ADDR sigcontext_base;
+ const struct mips_regnum *regs = mips_regnum (gdbarch);
+ CORE_ADDR regs_base;
+
+ if (self == &mips_linux_o32_sigframe
+ || self == µmips_linux_o32_sigframe)
+ sigcontext_base = frame_sp + SIGFRAME_SIGCONTEXT_OFFSET;
+ else
+ sigcontext_base = frame_sp + RTSIGFRAME_SIGCONTEXT_OFFSET;
+
+ /* I'm not proud of this hack. Eventually we will have the
+ infrastructure to indicate the size of saved registers on a
+ per-frame basis, but right now we don't; the kernel saves eight
+ bytes but we only want four. Use regs_base to access any
+ 64-bit fields. */
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ regs_base = sigcontext_base + 4;
else
- sigcontext_base += RTSIGFRAME_SIGCONTEXT_OFFSET;
-
- /* I'm not proud of this hack. Eventually we will have the infrastructure
- to indicate the size of saved registers on a per-frame basis, but
- right now we don't; the kernel saves eight bytes but we only want
- four. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- sigcontext_base += 4;
-
-#if 0
- trad_frame_set_reg_addr (this_cache, ORIG_ZERO_REGNUM + NUM_REGS,
- sigcontext_base + SIGCONTEXT_REGS);
-#endif
+ regs_base = sigcontext_base;
- for (ireg = 1; ireg < 32; ireg++)
- trad_frame_set_reg_addr (this_cache, ireg + MIPS_ZERO_REGNUM + NUM_REGS,
- sigcontext_base + SIGCONTEXT_REGS
- + ireg * SIGCONTEXT_REG_SIZE);
+ if (mips_linux_restart_reg_p (gdbarch))
+ trad_frame_set_reg_addr (this_cache,
+ (MIPS_RESTART_REGNUM
+ + gdbarch_num_regs (gdbarch)),
+ regs_base + SIGCONTEXT_REGS);
+ for (ireg = 1; ireg < 32; ireg++)
+ trad_frame_set_reg_addr (this_cache,
+ (ireg + MIPS_ZERO_REGNUM
+ + gdbarch_num_regs (gdbarch)),
+ (regs_base + SIGCONTEXT_REGS
+ + ireg * SIGCONTEXT_REG_SIZE));
+
+ /* The way that floating point registers are saved, unfortunately,
+ depends on the architecture the kernel is built for. For the r3000 and
+ tx39, four bytes of each register are at the beginning of each of the
+ 32 eight byte slots. For everything else, the registers are saved
+ using double precision; only the even-numbered slots are initialized,
+ and the high bits are the odd-numbered register. Assume the latter
+ layout, since we can't tell, and it's much more common. Which bits are
+ the "high" bits depends on endianness. */
for (ireg = 0; ireg < 32; ireg++)
- trad_frame_set_reg_addr (this_cache, ireg + regs->fp0 + NUM_REGS,
- sigcontext_base + SIGCONTEXT_FPREGS
- + ireg * SIGCONTEXT_REG_SIZE);
+ if ((gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) != (ireg & 1))
+ trad_frame_set_reg_addr (this_cache,
+ ireg + regs->fp0 + gdbarch_num_regs (gdbarch),
+ (sigcontext_base + SIGCONTEXT_FPREGS + 4
+ + (ireg & ~1) * SIGCONTEXT_REG_SIZE));
+ else
+ trad_frame_set_reg_addr (this_cache,
+ ireg + regs->fp0 + gdbarch_num_regs (gdbarch),
+ (sigcontext_base + SIGCONTEXT_FPREGS
+ + (ireg & ~1) * SIGCONTEXT_REG_SIZE));
+
+ trad_frame_set_reg_addr (this_cache,
+ regs->pc + gdbarch_num_regs (gdbarch),
+ regs_base + SIGCONTEXT_PC);
+
+ trad_frame_set_reg_addr (this_cache,
+ (regs->fp_control_status
+ + gdbarch_num_regs (gdbarch)),
+ sigcontext_base + SIGCONTEXT_FPCSR);
- trad_frame_set_reg_addr (this_cache, regs->pc + NUM_REGS,
- sigcontext_base + SIGCONTEXT_PC);
+ if (regs->dspctl != -1)
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspctl + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_DSPCTL);
- trad_frame_set_reg_addr (this_cache, regs->fp_control_status + NUM_REGS,
- sigcontext_base + SIGCONTEXT_FPCSR);
- trad_frame_set_reg_addr (this_cache, regs->hi + NUM_REGS,
- sigcontext_base + SIGCONTEXT_HI);
- trad_frame_set_reg_addr (this_cache, regs->lo + NUM_REGS,
- sigcontext_base + SIGCONTEXT_LO);
- trad_frame_set_reg_addr (this_cache, regs->cause + NUM_REGS,
- sigcontext_base + SIGCONTEXT_CAUSE);
- trad_frame_set_reg_addr (this_cache, regs->badvaddr + NUM_REGS,
- sigcontext_base + SIGCONTEXT_BADVADDR);
+ trad_frame_set_reg_addr (this_cache,
+ regs->hi + gdbarch_num_regs (gdbarch),
+ regs_base + SIGCONTEXT_HI);
+ trad_frame_set_reg_addr (this_cache,
+ regs->lo + gdbarch_num_regs (gdbarch),
+ regs_base + SIGCONTEXT_LO);
+
+ if (regs->dspacc != -1)
+ {
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 0 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_HI1);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 1 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_LO1);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 2 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_HI2);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 3 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_LO2);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 4 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_HI3);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 5 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_LO3);
+ }
+ else
+ {
+ trad_frame_set_reg_addr (this_cache,
+ regs->cause + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_CAUSE);
+ trad_frame_set_reg_addr (this_cache,
+ regs->badvaddr + gdbarch_num_regs (gdbarch),
+ sigcontext_base + SIGCONTEXT_BADVADDR);
+ }
/* Choice of the bottom of the sigframe is somewhat arbitrary. */
- trad_frame_set_id (this_cache,
- frame_id_build (func - SIGFRAME_CODE_OFFSET, func));
+ trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
}
/* *INDENT-OFF* */
@@ -1008,7 +1184,7 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
struct rt_sigframe_n32 {
u32 rs_ass[4]; [ argument save space for o32 ]
- u32 rs_code[2]; [ signal trampoline ]
+ u32 rs_code[2]; [ signal trampoline or fill ]
struct siginfo rs_info;
struct ucontextn32 rs_uc;
};
@@ -1020,8 +1196,8 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
struct sigcontext uc_mcontext;
sigset_t uc_sigmask; [ mask last for extensibility ]
};
-
- struct rt_sigframe_n32 {
+
+ struct rt_sigframe {
u32 rs_ass[4]; [ argument save space for o32 ]
u32 rs_code[2]; [ signal trampoline ]
struct siginfo rs_info;
@@ -1042,15 +1218,23 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
unsigned long long sc_regs[32];
unsigned long long sc_fpregs[32];
unsigned long long sc_mdhi;
+ unsigned long long sc_hi1;
+ unsigned long long sc_hi2;
+ unsigned long long sc_hi3;
unsigned long long sc_mdlo;
+ unsigned long long sc_lo1;
+ unsigned long long sc_lo2;
+ unsigned long long sc_lo3;
unsigned long long sc_pc;
- unsigned int sc_status;
unsigned int sc_fpc_csr;
- unsigned int sc_fpc_eir;
unsigned int sc_used_math;
- unsigned int sc_cause;
- unsigned int sc_badvaddr;
- }; */
+ unsigned int sc_dsp;
+ unsigned int sc_reserved;
+ };
+
+ That is the post-2.6.12 definition of the 64-bit sigcontext; before
+ then, there were no hi1-hi3 or lo1-lo3. Cause and badvaddr were
+ included too. */
/* *INDENT-ON* */
#define N32_STACK_T_SIZE STACK_T_SIZE
@@ -1067,101 +1251,451 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
#define N64_SIGCONTEXT_REGS (0 * 8)
#define N64_SIGCONTEXT_FPREGS (32 * 8)
#define N64_SIGCONTEXT_HI (64 * 8)
-#define N64_SIGCONTEXT_LO (65 * 8)
-#define N64_SIGCONTEXT_PC (66 * 8)
-#define N64_SIGCONTEXT_FPCSR (67 * 8 + 1 * 4)
-#define N64_SIGCONTEXT_FIR (67 * 8 + 2 * 4)
-#define N64_SIGCONTEXT_CAUSE (67 * 8 + 4 * 4)
-#define N64_SIGCONTEXT_BADVADDR (67 * 8 + 5 * 4)
+#define N64_SIGCONTEXT_HI1 (65 * 8)
+#define N64_SIGCONTEXT_HI2 (66 * 8)
+#define N64_SIGCONTEXT_HI3 (67 * 8)
+#define N64_SIGCONTEXT_LO (68 * 8)
+#define N64_SIGCONTEXT_LO1 (69 * 8)
+#define N64_SIGCONTEXT_LO2 (70 * 8)
+#define N64_SIGCONTEXT_LO3 (71 * 8)
+#define N64_SIGCONTEXT_PC (72 * 8)
+#define N64_SIGCONTEXT_FPCSR (73 * 8 + 0)
+#define N64_SIGCONTEXT_DSPCTL (74 * 8 + 0)
#define N64_SIGCONTEXT_REG_SIZE 8
-
+
static void
mips_linux_n32n64_sigframe_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)
{
- int ireg, reg_position;
- CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
- const struct mips_regnum *regs = mips_regnum (current_gdbarch);
-
- if (self == &mips_linux_n32_rt_sigframe)
- sigcontext_base += N32_SIGFRAME_SIGCONTEXT_OFFSET;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ int ireg;
+ CORE_ADDR frame_sp = get_frame_sp (this_frame);
+ CORE_ADDR sigcontext_base;
+ const struct mips_regnum *regs = mips_regnum (gdbarch);
+
+ if (self == &mips_linux_n32_rt_sigframe
+ || self == µmips_linux_n32_rt_sigframe)
+ sigcontext_base = frame_sp + N32_SIGFRAME_SIGCONTEXT_OFFSET;
else
- sigcontext_base += N64_SIGFRAME_SIGCONTEXT_OFFSET;
-
-#if 0
- trad_frame_set_reg_addr (this_cache, ORIG_ZERO_REGNUM + NUM_REGS,
- sigcontext_base + N64_SIGCONTEXT_REGS);
-#endif
+ sigcontext_base = frame_sp + N64_SIGFRAME_SIGCONTEXT_OFFSET;
+
+ if (mips_linux_restart_reg_p (gdbarch))
+ trad_frame_set_reg_addr (this_cache,
+ (MIPS_RESTART_REGNUM
+ + gdbarch_num_regs (gdbarch)),
+ sigcontext_base + N64_SIGCONTEXT_REGS);
for (ireg = 1; ireg < 32; ireg++)
- trad_frame_set_reg_addr (this_cache, ireg + MIPS_ZERO_REGNUM + NUM_REGS,
- sigcontext_base + N64_SIGCONTEXT_REGS
- + ireg * N64_SIGCONTEXT_REG_SIZE);
+ trad_frame_set_reg_addr (this_cache,
+ (ireg + MIPS_ZERO_REGNUM
+ + gdbarch_num_regs (gdbarch)),
+ (sigcontext_base + N64_SIGCONTEXT_REGS
+ + ireg * N64_SIGCONTEXT_REG_SIZE));
for (ireg = 0; ireg < 32; ireg++)
- trad_frame_set_reg_addr (this_cache, ireg + regs->fp0 + NUM_REGS,
- sigcontext_base + N64_SIGCONTEXT_FPREGS
- + ireg * N64_SIGCONTEXT_REG_SIZE);
+ trad_frame_set_reg_addr (this_cache,
+ ireg + regs->fp0 + gdbarch_num_regs (gdbarch),
+ (sigcontext_base + N64_SIGCONTEXT_FPREGS
+ + ireg * N64_SIGCONTEXT_REG_SIZE));
- trad_frame_set_reg_addr (this_cache, regs->pc + NUM_REGS,
+ trad_frame_set_reg_addr (this_cache,
+ regs->pc + gdbarch_num_regs (gdbarch),
sigcontext_base + N64_SIGCONTEXT_PC);
- trad_frame_set_reg_addr (this_cache, regs->fp_control_status + NUM_REGS,
+ trad_frame_set_reg_addr (this_cache,
+ (regs->fp_control_status
+ + gdbarch_num_regs (gdbarch)),
sigcontext_base + N64_SIGCONTEXT_FPCSR);
- trad_frame_set_reg_addr (this_cache, regs->hi + NUM_REGS,
+
+ trad_frame_set_reg_addr (this_cache,
+ regs->hi + gdbarch_num_regs (gdbarch),
sigcontext_base + N64_SIGCONTEXT_HI);
- trad_frame_set_reg_addr (this_cache, regs->lo + NUM_REGS,
+ trad_frame_set_reg_addr (this_cache,
+ regs->lo + gdbarch_num_regs (gdbarch),
sigcontext_base + N64_SIGCONTEXT_LO);
- trad_frame_set_reg_addr (this_cache, regs->cause + NUM_REGS,
- sigcontext_base + N64_SIGCONTEXT_CAUSE);
- trad_frame_set_reg_addr (this_cache, regs->badvaddr + NUM_REGS,
- sigcontext_base + N64_SIGCONTEXT_BADVADDR);
+
+ if (regs->dspacc != -1)
+ {
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 0 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_HI1);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 1 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_LO1);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 2 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_HI2);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 3 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_LO2);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 4 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_HI3);
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspacc + 5 + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_LO3);
+ }
+ if (regs->dspctl != -1)
+ trad_frame_set_reg_addr (this_cache,
+ regs->dspctl + gdbarch_num_regs (gdbarch),
+ sigcontext_base + N64_SIGCONTEXT_DSPCTL);
/* Choice of the bottom of the sigframe is somewhat arbitrary. */
- trad_frame_set_id (this_cache,
- frame_id_build (func - SIGFRAME_CODE_OFFSET, func));
+ trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
+}
+
+/* Implement struct tramp_frame's "validate" method for standard MIPS code. */
+
+static int
+mips_linux_sigframe_validate (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ CORE_ADDR *pc)
+{
+ return mips_pc_is_mips (*pc);
+}
+
+/* Implement struct tramp_frame's "validate" method for microMIPS code. */
+
+static int
+micromips_linux_sigframe_validate (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ CORE_ADDR *pc)
+{
+ if (mips_pc_is_micromips (get_frame_arch (this_frame), *pc))
+ {
+ *pc = mips_unmake_compact_addr (*pc);
+ return 1;
+ }
+ else
+ return 0;
+}
+
+/* Implement the "write_pc" gdbarch method. */
+
+static void
+mips_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+
+ mips_write_pc (regcache, pc);
+
+ /* Clear the syscall restart flag. */
+ if (mips_linux_restart_reg_p (gdbarch))
+ regcache_cooked_write_unsigned (regcache, MIPS_RESTART_REGNUM, 0);
+}
+
+/* Return 1 if MIPS_RESTART_REGNUM is usable. */
+
+int
+mips_linux_restart_reg_p (struct gdbarch *gdbarch)
+{
+ /* If we do not have a target description with registers, then
+ MIPS_RESTART_REGNUM will not be included in the register set. */
+ if (!tdesc_has_registers (gdbarch_target_desc (gdbarch)))
+ return 0;
+
+ /* If we do, then MIPS_RESTART_REGNUM is safe to check; it will
+ either be GPR-sized or missing. */
+ return register_size (gdbarch, MIPS_RESTART_REGNUM) > 0;
+}
+
+/* When FRAME is at a syscall instruction, return the PC of the next
+ instruction to be executed. */
+
+static CORE_ADDR
+mips_linux_syscall_next_pc (struct frame_info *frame)
+{
+ CORE_ADDR pc = get_frame_pc (frame);
+ ULONGEST v0 = get_frame_register_unsigned (frame, MIPS_V0_REGNUM);
+
+ /* If we are about to make a sigreturn syscall, use the unwinder to
+ decode the signal frame. */
+ if (v0 == MIPS_NR_sigreturn
+ || v0 == MIPS_NR_rt_sigreturn
+ || v0 == MIPS_NR_N64_rt_sigreturn
+ || v0 == MIPS_NR_N32_rt_sigreturn)
+ return frame_unwind_caller_pc (get_current_frame ());
+
+ return pc + 4;
+}
+
+/* Return the current system call's number present in the
+ v0 register. When the function fails, it returns -1. */
+
+static LONGEST
+mips_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);
+ int regsize = register_size (gdbarch, MIPS_V0_REGNUM);
+ /* The content of a register */
+ gdb_byte buf[8];
+ /* The result */
+ LONGEST ret;
+
+ /* Make sure we're in a known ABI */
+ gdb_assert (tdep->mips_abi == MIPS_ABI_O32
+ || tdep->mips_abi == MIPS_ABI_N32
+ || tdep->mips_abi == MIPS_ABI_N64);
+
+ gdb_assert (regsize <= sizeof (buf));
+
+ /* Getting the system call number from the register.
+ syscall number is in v0 or $2. */
+ regcache_cooked_read (regcache, MIPS_V0_REGNUM, buf);
+
+ ret = extract_signed_integer (buf, regsize, byte_order);
+
+ return ret;
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+ gdbarch.h. */
+
+static int
+mips_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ case GDB_SIGNAL_EMT:
+ return MIPS_LINUX_SIGEMT;
+
+ case GDB_SIGNAL_BUS:
+ return MIPS_LINUX_SIGBUS;
+
+ case GDB_SIGNAL_SYS:
+ return MIPS_LINUX_SIGSYS;
+
+ case GDB_SIGNAL_USR1:
+ return MIPS_LINUX_SIGUSR1;
+
+ case GDB_SIGNAL_USR2:
+ return MIPS_LINUX_SIGUSR2;
+
+ case GDB_SIGNAL_CHLD:
+ return MIPS_LINUX_SIGCHLD;
+
+ case GDB_SIGNAL_PWR:
+ return MIPS_LINUX_SIGPWR;
+
+ case GDB_SIGNAL_WINCH:
+ return MIPS_LINUX_SIGWINCH;
+
+ case GDB_SIGNAL_URG:
+ return MIPS_LINUX_SIGURG;
+
+ case GDB_SIGNAL_IO:
+ return MIPS_LINUX_SIGIO;
+
+ case GDB_SIGNAL_POLL:
+ return MIPS_LINUX_SIGPOLL;
+
+ case GDB_SIGNAL_STOP:
+ return MIPS_LINUX_SIGSTOP;
+
+ case GDB_SIGNAL_TSTP:
+ return MIPS_LINUX_SIGTSTP;
+
+ case GDB_SIGNAL_CONT:
+ return MIPS_LINUX_SIGCONT;
+
+ case GDB_SIGNAL_TTIN:
+ return MIPS_LINUX_SIGTTIN;
+
+ case GDB_SIGNAL_TTOU:
+ return MIPS_LINUX_SIGTTOU;
+
+ case GDB_SIGNAL_VTALRM:
+ return MIPS_LINUX_SIGVTALRM;
+
+ case GDB_SIGNAL_PROF:
+ return MIPS_LINUX_SIGPROF;
+
+ case GDB_SIGNAL_XCPU:
+ return MIPS_LINUX_SIGXCPU;
+
+ case GDB_SIGNAL_XFSZ:
+ return MIPS_LINUX_SIGXFSZ;
+
+ /* GDB_SIGNAL_REALTIME_32 is not continuous in ,
+ therefore we have to handle it here. */
+ case GDB_SIGNAL_REALTIME_32:
+ return MIPS_LINUX_SIGRTMIN;
+ }
+
+ if (signal >= GDB_SIGNAL_REALTIME_33
+ && signal <= GDB_SIGNAL_REALTIME_63)
+ {
+ int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+ return MIPS_LINUX_SIGRTMIN + 1 + offset;
+ }
+ else if (signal >= GDB_SIGNAL_REALTIME_64
+ && signal <= GDB_SIGNAL_REALTIME_127)
+ {
+ int offset = signal - GDB_SIGNAL_REALTIME_64;
+
+ return MIPS_LINUX_SIGRT64 + offset;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
+/* Translate signals based on MIPS signal values.
+ Adapted from gdb/common/signals.c. */
+
+static enum gdb_signal
+mips_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
+{
+ switch (signal)
+ {
+ case MIPS_LINUX_SIGEMT:
+ return GDB_SIGNAL_EMT;
+
+ case MIPS_LINUX_SIGBUS:
+ return GDB_SIGNAL_BUS;
+
+ case MIPS_LINUX_SIGSYS:
+ return GDB_SIGNAL_SYS;
+
+ case MIPS_LINUX_SIGUSR1:
+ return GDB_SIGNAL_USR1;
+
+ case MIPS_LINUX_SIGUSR2:
+ return GDB_SIGNAL_USR2;
+
+ case MIPS_LINUX_SIGCHLD:
+ return GDB_SIGNAL_CHLD;
+
+ case MIPS_LINUX_SIGPWR:
+ return GDB_SIGNAL_PWR;
+
+ case MIPS_LINUX_SIGWINCH:
+ return GDB_SIGNAL_WINCH;
+
+ case MIPS_LINUX_SIGURG:
+ return GDB_SIGNAL_URG;
+
+ /* No way to differentiate between SIGIO and SIGPOLL.
+ Therefore, we just handle the first one. */
+ case MIPS_LINUX_SIGIO:
+ return GDB_SIGNAL_IO;
+
+ case MIPS_LINUX_SIGSTOP:
+ return GDB_SIGNAL_STOP;
+
+ case MIPS_LINUX_SIGTSTP:
+ return GDB_SIGNAL_TSTP;
+
+ case MIPS_LINUX_SIGCONT:
+ return GDB_SIGNAL_CONT;
+
+ case MIPS_LINUX_SIGTTIN:
+ return GDB_SIGNAL_TTIN;
+
+ case MIPS_LINUX_SIGTTOU:
+ return GDB_SIGNAL_TTOU;
+
+ case MIPS_LINUX_SIGVTALRM:
+ return GDB_SIGNAL_VTALRM;
+
+ case MIPS_LINUX_SIGPROF:
+ return GDB_SIGNAL_PROF;
+
+ case MIPS_LINUX_SIGXCPU:
+ return GDB_SIGNAL_XCPU;
+
+ case MIPS_LINUX_SIGXFSZ:
+ return GDB_SIGNAL_XFSZ;
+ }
+
+ if (signal >= MIPS_LINUX_SIGRTMIN && signal <= MIPS_LINUX_SIGRTMAX)
+ {
+ /* GDB_SIGNAL_REALTIME values are not contiguous, map parts of
+ the MIPS block to the respective GDB_SIGNAL_REALTIME blocks. */
+ int offset = signal - MIPS_LINUX_SIGRTMIN;
+
+ if (offset == 0)
+ return GDB_SIGNAL_REALTIME_32;
+ else if (offset < 32)
+ return (enum gdb_signal) (offset - 1
+ + (int) GDB_SIGNAL_REALTIME_33);
+ else
+ return (enum gdb_signal) (offset - 32
+ + (int) GDB_SIGNAL_REALTIME_64);
+ }
+
+ return linux_gdb_signal_from_target (gdbarch, signal);
}
/* Initialize one of the GNU/Linux OS ABIs. */
static void
-mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+mips_linux_init_abi (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum mips_abi abi = mips_abi (gdbarch);
+ struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
+
+ linux_init_abi (info, gdbarch);
+
+ /* Get the syscall number from the arch's register. */
+ set_gdbarch_get_syscall_number (gdbarch, mips_linux_get_syscall_number);
switch (abi)
{
case MIPS_ABI_O32:
set_gdbarch_get_longjmp_target (gdbarch,
- mips_linux_get_longjmp_target);
+ mips_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, mips_linux_svr4_fetch_link_map_offsets);
- set_mips_linux_register_addr (gdbarch, mips_linux_register_addr);
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ tramp_frame_prepend_unwinder (gdbarch, µmips_linux_o32_sigframe);
+ tramp_frame_prepend_unwinder (gdbarch,
+ µmips_linux_o32_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_rt_sigframe);
+ set_xml_syscall_file_name (gdbarch, "syscalls/mips-o32-linux.xml");
break;
case MIPS_ABI_N32:
set_gdbarch_get_longjmp_target (gdbarch,
- mips_linux_get_longjmp_target);
+ mips_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, mips_linux_svr4_fetch_link_map_offsets);
- set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ set_gdbarch_long_double_bit (gdbarch, 128);
+ /* These floatformats should probably be renamed. MIPS uses
+ the same 128-bit IEEE floating point format that IA-64 uses,
+ except that the quiet/signalling NaN bit is reversed (GDB
+ does not distinguish between quiet and signalling NaNs). */
+ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+ tramp_frame_prepend_unwinder (gdbarch,
+ µmips_linux_n32_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n32_rt_sigframe);
+ set_xml_syscall_file_name (gdbarch, "syscalls/mips-n32-linux.xml");
break;
case MIPS_ABI_N64:
set_gdbarch_get_longjmp_target (gdbarch,
- mips64_linux_get_longjmp_target);
+ mips64_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, mips64_linux_svr4_fetch_link_map_offsets);
- set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ set_gdbarch_long_double_bit (gdbarch, 128);
+ /* These floatformats should probably be renamed. MIPS uses
+ the same 128-bit IEEE floating point format that IA-64 uses,
+ except that the quiet/signalling NaN bit is reversed (GDB
+ does not distinguish between quiet and signalling NaNs). */
+ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+ tramp_frame_prepend_unwinder (gdbarch,
+ µmips_linux_n64_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n64_rt_sigframe);
+ set_xml_syscall_file_name (gdbarch, "syscalls/mips-n64-linux.xml");
break;
default:
- internal_error (__FILE__, __LINE__, "can't handle ABI");
break;
}
@@ -1169,26 +1703,70 @@ mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
- /* This overrides the MIPS16 stub support from mips-tdep. But no
- one uses MIPS16 on GNU/Linux yet, so this isn't much of a loss. */
- set_gdbarch_in_solib_call_trampoline (gdbarch, mips_linux_in_dynsym_stub);
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ /* Initialize this lazily, to avoid an initialization order
+ dependency on solib-svr4.c's _initialize routine. */
+ if (mips_svr4_so_ops.in_dynsym_resolve_code == NULL)
+ {
+ mips_svr4_so_ops = svr4_so_ops;
+ mips_svr4_so_ops.in_dynsym_resolve_code
+ = mips_linux_in_dynsym_resolve_code;
+ }
+ set_solib_ops (gdbarch, &mips_svr4_so_ops);
+
+ set_gdbarch_write_pc (gdbarch, mips_linux_write_pc);
+
+ set_gdbarch_core_read_description (gdbarch,
+ mips_linux_core_read_description);
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, mips_linux_iterate_over_regset_sections);
+
+ set_gdbarch_gdb_signal_from_target (gdbarch,
+ mips_gdb_signal_from_target);
+
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ mips_gdb_signal_to_target);
+
+ tdep->syscall_next_pc = mips_linux_syscall_next_pc;
+
+ if (tdesc_data)
+ {
+ const struct tdesc_feature *feature;
+
+ /* If we have target-described registers, then we can safely
+ reserve a number for MIPS_RESTART_REGNUM (whether it is
+ described or not). */
+ gdb_assert (gdbarch_num_regs (gdbarch) <= MIPS_RESTART_REGNUM);
+ set_gdbarch_num_regs (gdbarch, MIPS_RESTART_REGNUM + 1);
+ set_gdbarch_num_pseudo_regs (gdbarch, MIPS_RESTART_REGNUM + 1);
+
+ /* If it's present, then assign it to the reserved number. */
+ feature = tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.mips.linux");
+ if (feature != NULL)
+ tdesc_numbered_register (feature, tdesc_data, MIPS_RESTART_REGNUM,
+ "restart");
+ }
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_mips_linux_tdep;
+
void
_initialize_mips_linux_tdep (void)
{
const struct bfd_arch_info *arch_info;
- register_addr_data =
- gdbarch_data_register_post_init (init_register_addr_data);
-
for (arch_info = bfd_lookup_arch (bfd_arch_mips, 0);
arch_info != NULL;
arch_info = arch_info->next)
{
- gdbarch_register_osabi (bfd_arch_mips, arch_info->mach, GDB_OSABI_LINUX,
+ gdbarch_register_osabi (bfd_arch_mips, arch_info->mach,
+ GDB_OSABI_LINUX,
mips_linux_init_abi);
}
-
- deprecated_add_core_fns (®set_core_fns);
}