binutils-gdb/gdb/mips-irix-tdep.c

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/* Target-dependent code for the MIPS architecture running on IRIX,
for GDB, the GNU Debugger.
Copyright (C) 2002, 2007-2012 Free Software Foundation, Inc.
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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 3 of the License, or
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(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
#include "osabi.h"
#include "gdb_string.h"
#include "solib.h"
#include "solib-irix.h"
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#include "elf-bfd.h"
#include "mips-tdep.h"
#include "trad-frame.h"
#include "tramp-frame.h"
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static void
mips_irix_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect,
void *obj)
{
enum gdb_osabi *os_ident_ptr = obj;
const char *name;
unsigned int sectsize;
name = bfd_get_section_name (abfd, sect);
sectsize = bfd_section_size (abfd, sect);
if (strncmp (name, ".MIPS.", 6) == 0 && sectsize > 0)
{
/* The presence of a section named with a ".MIPS." prefix is
indicative of an IRIX binary. */
*os_ident_ptr = GDB_OSABI_IRIX;
}
}
static enum gdb_osabi
mips_irix_elf_osabi_sniffer (bfd *abfd)
{
unsigned int elfosabi;
enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
/* If the generic sniffer gets a hit, return and let other sniffers
get a crack at it. */
bfd_map_over_sections (abfd,
generic_elf_osabi_sniff_abi_tag_sections,
&osabi);
if (osabi != GDB_OSABI_UNKNOWN)
return GDB_OSABI_UNKNOWN;
elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI];
if (elfosabi == ELFOSABI_NONE)
{
/* When elfosabi is ELFOSABI_NONE (0), then the ELF structures in the
file are conforming to the base specification for that machine
(there are no OS-specific extensions). In order to determine the
real OS in use we must look for OS notes that have been added.
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For IRIX, we simply look for sections named with .MIPS. as
prefixes. */
bfd_map_over_sections (abfd,
mips_irix_elf_osabi_sniff_abi_tag_sections,
&osabi);
}
return osabi;
}
/* Unwinding past the signal handler on mips-irix.
Note: The following has only been tested with N32, but can probably
be made to work with a small number of adjustments.
On mips-irix, the sigcontext_t structure is stored at the base
of the frame established by the _sigtramp function. The definition
of this structure can be found in <sys/signal.h> (comments have been
C++'ified to avoid a collision with the C-style comment delimiters
used by this comment):
typedef struct sigcontext {
__uint32_t sc_regmask; // regs to restore in sigcleanup
__uint32_t sc_status; // cp0 status register
__uint64_t sc_pc; // pc at time of signal
// General purpose registers
__uint64_t sc_regs[32]; // processor regs 0 to 31
// Floating point coprocessor state
__uint64_t sc_fpregs[32]; // fp regs 0 to 31
__uint32_t sc_ownedfp; // fp has been used
__uint32_t sc_fpc_csr; // fpu control and status reg
__uint32_t sc_fpc_eir; // fpu exception instruction reg
// implementation/revision
__uint32_t sc_ssflags; // signal stack state to restore
__uint64_t sc_mdhi; // Multiplier hi and low regs
__uint64_t sc_mdlo;
// System coprocessor registers at time of signal
__uint64_t sc_cause; // cp0 cause register
__uint64_t sc_badvaddr; // cp0 bad virtual address
__uint64_t sc_triggersave; // state of graphics trigger (SGI)
sigset_t sc_sigset; // signal mask to restore
__uint64_t sc_fp_rounded_result; // for Ieee 754 support
__uint64_t sc_pad[31];
} sigcontext_t;
The following macros provide the offset of some of the fields
used to retrieve the value of the registers before the signal
was raised. */
/* The size of the sigtramp frame. The sigtramp frame base can then
be computed by adding this size to the SP. */
#define SIGTRAMP_FRAME_SIZE 48
/* The offset in sigcontext_t where the PC is saved. */
#define SIGCONTEXT_PC_OFF 8
/* The offset in sigcontext_t where the GP registers are saved. */
#define SIGCONTEXT_REGS_OFF (SIGCONTEXT_PC_OFF + 8)
/* The offset in sigcontext_t where the FP regsiters are saved. */
#define SIGCONTEXT_FPREGS_OFF (SIGCONTEXT_REGS_OFF + 32 * 8)
/* The offset in sigcontext_t where the FP CSR register is saved. */
#define SIGCONTEXT_FPCSR_OFF (SIGCONTEXT_FPREGS_OFF + 32 * 8 + 4)
/* The offset in sigcontext_t where the multiplier hi register is saved. */
#define SIGCONTEXT_HI_OFF (SIGCONTEXT_FPCSR_OFF + 2 * 4)
/* The offset in sigcontext_t where the multiplier lo register is saved. */
#define SIGCONTEXT_LO_OFF (SIGCONTEXT_HI_OFF + 4)
/* Implement the "init" routine in struct tramp_frame for the N32 ABI
on mips-irix. */
static void
mips_irix_n32_tramp_frame_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
const int num_regs = gdbarch_num_regs (gdbarch);
int sp_cooked_regno = num_regs + MIPS_SP_REGNUM;
const CORE_ADDR sp = get_frame_register_signed (this_frame, sp_cooked_regno);
const CORE_ADDR sigcontext_base = sp + 48;
const struct mips_regnum *regs = mips_regnum (gdbarch);
int ireg;
trad_frame_set_reg_addr (this_cache, regs->pc + gdbarch_num_regs (gdbarch),
sigcontext_base + SIGCONTEXT_PC_OFF);
for (ireg = 1; ireg < 32; ireg++)
trad_frame_set_reg_addr (this_cache, ireg + MIPS_ZERO_REGNUM + num_regs,
sigcontext_base + SIGCONTEXT_REGS_OFF + ireg * 8);
for (ireg = 0; ireg < 32; ireg++)
trad_frame_set_reg_addr (this_cache, ireg + regs->fp0 + num_regs,
sigcontext_base + SIGCONTEXT_FPREGS_OFF
+ ireg * 8);
trad_frame_set_reg_addr (this_cache, regs->fp_control_status + num_regs,
sigcontext_base + SIGCONTEXT_FPCSR_OFF);
trad_frame_set_reg_addr (this_cache, regs->hi + num_regs,
sigcontext_base + SIGCONTEXT_HI_OFF);
trad_frame_set_reg_addr (this_cache, regs->lo + num_regs,
sigcontext_base + SIGCONTEXT_LO_OFF);
trad_frame_set_id (this_cache, frame_id_build (sigcontext_base, func));
}
/* The tramp_frame structure describing sigtramp frames on mips-irix N32.
Note that the list of instructions below is pretty much a pure dump
of function _sigtramp on mips-irix. A few instructions are actually
not tested (mask set to 0), because a portion of these instructions
contain an address which changes due to relocation. We could use
a smarter mask that checks the instrutction code alone, but given
the number of instructions already being checked, this seemed
unnecessary. */
static const struct tramp_frame mips_irix_n32_tramp_frame =
{
SIGTRAMP_FRAME,
4,
{
{ 0x3c0c8000, -1 }, /* lui t0,0x8000 */
{ 0x27bdffd0, -1 }, /* addiu sp,sp,-48 */
{ 0x008c6024, -1 }, /* and t0,a0,t0 */
{ 0xffa40018, -1 }, /* sd a0,24(sp) */
{ 0x00000000, 0 }, /* beqz t0,0xfaefcb8 <_sigtramp+40> */
{ 0xffa60028, -1 }, /* sd a2,40(sp) */
{ 0x01806027, -1 }, /* nor t0,t0,zero */
{ 0xffa00020, -1 }, /* sd zero,32(sp) */
{ 0x00000000, 0 }, /* b 0xfaefcbc <_sigtramp+44> */
{ 0x008c2024, -1 }, /* and a0,a0,t0 */
{ 0xffa60020, -1 }, /* sd a2,32(sp) */
{ 0x03e0c025, -1 }, /* move t8,ra */
{ 0x00000000, 0 }, /* bal 0xfaefcc8 <_sigtramp+56> */
{ 0x00000000, -1 }, /* nop */
{ 0x3c0c0007, -1 }, /* lui t0,0x7 */
{ 0x00e0c825, -1 }, /* move t9,a3 */
{ 0x658c80fc, -1 }, /* daddiu t0,t0,-32516 */
{ 0x019f602d, -1 }, /* daddu t0,t0,ra */
{ 0x0300f825, -1 }, /* move ra,t8 */
{ 0x8d8c9880, -1 }, /* lw t0,-26496(t0) */
{ 0x8d8c0000, -1 }, /* lw t0,0(t0) */
{ 0x8d8d0000, -1 }, /* lw t1,0(t0) */
{ 0xffac0008, -1 }, /* sd t0,8(sp) */
{ 0x0320f809, -1 }, /* jalr t9 */
{ 0xffad0010, -1 }, /* sd t1,16(sp) */
{ 0xdfad0010, -1 }, /* ld t1,16(sp) */
{ 0xdfac0008, -1 }, /* ld t0,8(sp) */
{ 0xad8d0000, -1 }, /* sw t1,0(t0) */
{ 0xdfa40020, -1 }, /* ld a0,32(sp) */
{ 0xdfa50028, -1 }, /* ld a1,40(sp) */
{ 0xdfa60018, -1 }, /* ld a2,24(sp) */
{ 0x24020440, -1 }, /* li v0,1088 */
{ 0x0000000c, -1 }, /* syscall */
{ TRAMP_SENTINEL_INSN, -1 }
},
mips_irix_n32_tramp_frame_init
};
/* Implement the "init" routine in struct tramp_frame for the stack-based
trampolines used on mips-irix. */
static void
mips_irix_n32_stack_tramp_frame_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
const int num_regs = gdbarch_num_regs (gdbarch);
int sp_cooked_regno = num_regs + MIPS_SP_REGNUM;
const CORE_ADDR sp = get_frame_register_signed (this_frame, sp_cooked_regno);
/* The previous frame's PC is stored in RA. */
trad_frame_set_reg_realreg (this_cache, gdbarch_pc_regnum (gdbarch),
num_regs + MIPS_RA_REGNUM);
trad_frame_set_id (this_cache, frame_id_build (sp, func));
}
/* A tramp_frame structure describing the stack-based trampoline
used on mips-irix. These trampolines are created on the stack
before being called. */
static const struct tramp_frame mips_irix_n32_stack_tramp_frame =
{
SIGTRAMP_FRAME,
4,
{
{ 0x8f210000, 0xffff0000 }, /* lw at, N(t9) */
{ 0x8f2f0000, 0xffff0000 }, /* lw t3, M(t9) */
{ 0x00200008, 0xffffffff }, /* jr at */
{ 0x0020c82d, 0xffffffff }, /* move t9, at */
{ TRAMP_SENTINEL_INSN, -1 }
},
mips_irix_n32_stack_tramp_frame_init
};
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static void
mips_irix_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
set_solib_ops (gdbarch, &irix_so_ops);
tramp_frame_prepend_unwinder (gdbarch, &mips_irix_n32_stack_tramp_frame);
tramp_frame_prepend_unwinder (gdbarch, &mips_irix_n32_tramp_frame);
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}
Silence a few -Wmissing-prototypes warnings. PR build/9877: * alpha-linux-tdep.c (alpha_linux_regset_from_core_section): Make it static. * alpha-osf1-tdep.c (_initialize_alpha_osf1_tdep): Declare. * amd64fbsd-tdep.c (amd64fbsd_init_abi): Make it static. * amd64nbsd-tdep.c (_initialize_amd64nbsd_ndep): Rename to ... (_initialize_amd64nbsd_tdep): ... this. * arm-linux-tdep.c (arm_linux_software_single_step): Make it static. (_initialize_arm_linux_tdep): Declare. * armbsd-tdep.c (armbsd_fpreg_offset): Make it static. * armnbsd-tdep.c (_initialize_arm_netbsd_tdep): Declare. * armobsd-tdep.c (_initialize_armobsd_tdep): Declare. * avr-tdep.c (avr_return_value): Make it static. (avr_frame_unwind_cache): Ditto. * bsd-uthread.c (bsd_uthread_inferior_created): Ditto. (bsd_uthread_solib_loaded): Ditto. (bsd_uthread_solib_unloaded): Ditto. (bsd_uthread_target): Ditto. (_initialize_bsd_uthread): Declare. * cris-tdep.c (crisv32_single_step_through_delay): Make it static. (cris_frame_unwind_cache): Ditto. * frv-tdep.c (frv_return_value): Ditto. * h8300-tdep.c (h8300_use_struct_convention): Ditto. (h8300h_use_struct_convention): Ditto. * hppa-tdep.c (hppa_sign_extend, hppa_low_hppa_sign_extend): Ditto. * hppa-tdep.h (hppa_low_sign_extend, hppa_sign_extend): Delete declarations. * hppabsd-tdep.c: Include hppabsd-tdep.h. (hppabsd_find_global_pointer): Make it static. * hppabsd-tdep.h: New. * hppanbsd-tdep.c: Include hppabsd-tdep.h. (hppabsd_init_abi): Remove declaration. (_initialize_hppabsd_tdep): Remove declaration. (_initialize_hppanbsd_tdep): Declare. * hppaobsd-tdep.c: Include hppabsd-tdep.h. (hppabsd_init_abi): Delete declaration. (hppaobsd_init_abi): Make it static. * i386-nto-tdep.c (_initialize_i386nto_tdep): Declare. * i386nbsd-tdep.c (_initialize_i386nbsd_tdep): Declare. * ia64-linux-tdep.c (_initialize_ia64_linux_tdep): Declare. * ia64-tdep.c (ia64_register_reggroup_p): Make it static. * iq2000-tdep.c (_initialize_iq2000_tdep): Declare. * m32c-tdep.c (m32c_register_reggroup_p): Make it static. (m32c_analyze_prologue, m32c_virtual_frame_pointer): Ditto. (_initialize_m32c_tdep): Declare. * m32r-rom.c (_initialize_m32r_rom): Declare. * m32r-tdep.c (m32r_skip_prologue): Make it static. (m32r_return_value): Ditto. * m68hc11-tdep.c (m68hc11_frame_unwind_cache): Make it static. (m68hc11_return_value): Ditto. * m68klinux-tdep.c (_initialize_m68k_linux_tdep): Declare. * m88k-tdep.c (m88k_frame_cache): Make it static. * mep-tdep.c (mep_gdb_print_insn): Ditto. (mep_return_value): Ditto. (_initialize_mep_tdep): Declare. * mips-irix-tdep.c (_initialize_mips_irix_tdep): Declare. * mips-linux-tdep.c (supply_64bit_reg): Make it static. (mips_linux_syscall_next_pc): Ditto. (_initialize_mips_linux_tdep): Declare. * mips-tdep.c (mips_single_step_through_delay): Make it static. * mipsnbsd-tdep.c (_initialize_mipsnbsd_tdep): Declare. * mn10300-linux-tdep.c (_initialize_mn10300_linux_tdep): Declare. * mn10300-tdep.c (_initialize_mn10300_tdep): Declare. * mt-tdep.c (_initialize_mt_tdep): Declare. * nbsd-tdep.c: Include nbsd-tdep.h. * nto-tdep.c (find_load_phdr): Make it static. (_initialize_nto_tdep): Declare. * ppc-linux-tdep.c (ppc_linux_memory_remove_breakpoint): Make it static. (_initialize_ppc_linux_tdep): Declare. * remote-m32r-sdi.c (m32r_can_use_hw_watchpoint) (m32r_insert_watchpoint, m32r_remove_watchpoint) (m32r_stopped_data_address, m32r_stopped_by_watchpoint): Make static. * rs6000-aix-tdep.c (_initialize_rs6000_aix_tdep): Declare. * rs6000-nat.c: Include xcoffread.h. (find_toc_address): Don't extern declare get_toc_offset. Adjust to call xcoff_get_to_offset. * rs6000-tdep.c (ppc_vsx_support_p, ppc_displaced_step_fixup) (rs6000_skip_main_prologue, rs6000_in_solib_return_trampoline) (rs6000_skip_trampoline_code): Make static. * s390-tdep.c (s390_regset_from_core_section): Ditto. * sh-tdep.c (sh_register_reggroup_p): Ditto. * shnbsd-tdep.c (shnbsd_regset_from_core_section): Ditto. (_initialize_shnbsd_tdep): Declare. * solib-frv.c (displacement_from_map): Make static. (_initialize_frv_solib): Declare. * solib-irix.c (fetch_lm_info): Make static. (_initialize_irix_solib): Declare. * solib-som.c: Include solib-som.h. (som_solib_select): Line break. * sparc-tdep.c (sparc_regset_from_core_section): Make static. * sparcnbsd-tdep.c (_initialize_sparnbsd_tdep): Rename to ... (_initialize_sparcnbsd_tdep): ... this. * spu-tdep.c (spu_software_single_step): Make it static. (_initialize_spu_tdep): Declare. * vax-tdep.c (vax_frame_cache): Make it static. * xcoffread.c: Include xcoffread.h. (get_toc_offset): Rename to ... (xcoff_get_toc_offset): ... this. (_initialize_xcoffread): Declare. * xcoffread.h: New. * xtensa-linux-tdep.c (_initialize_xtensa_linux_tdep): Declare. * xtensa-tdep.c (xtensa_skip_prologue, xtensa_derive_tdep): Make static. (_initialize_xtensa_tdep): Declare.
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/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_mips_irix_tdep;
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void
_initialize_mips_irix_tdep (void)
{
/* Register an ELF OS ABI sniffer for IRIX binaries. */
gdbarch_register_osabi_sniffer (bfd_arch_mips,
bfd_target_elf_flavour,
mips_irix_elf_osabi_sniffer);
* osabi.c: Include "gdb_assert.h" and "gdb_string.h". (struct gdb_osabi_handler): Remove member `arch'. Add member `arch_info'. (gdbarch_register_osabi): Add new argument `machine'. Use ot to construct a `struct bfd_arch_info' and store it in the `struct gdb_osabi_handler' that is created. (gdbarch_init_osabi): Check for compatibility based on machine type and architecture. * osabi.h (gdbarch_register_osabi): Adjust prototype and update comment. * alpha-linux-tdep.c (_initialize_alpha_linux_tdep): Add 0 as second argument in call to gdbarch_register_osabi. * alpha-osf1-tdep.c (_initialize_alpha_osf1_tdep): Likewise. * alphafbsd-tdep.c (_initialize_alphafbsd_tdep): Likewise. * alphanbsd-tdep.c (_initialize_alphanbsd_tdep): Likewise. * arm-linux-tdep.c (_initialize_arm_linux_tdep): Likewise. * arm-tdep.c (_initialize_arm_tdep): Likewise. * armnbsd-tdep.c (_initialize_armnbsd_tdep): Likewise. * hppa-hpux-tdep.c (_initialize_hppa_hpux_tdep): Likewise. * i386-interix-tdep.c (_initialize_i386_interix_tdep): Likewise. * i386-linux-tdep.c (_initialize_i386_linux_tdep): Likewise. * i386-sol2-tdep.c (_initialize_i386_sol2_tdep): Likewise. * i386-tdep.c (_initialize_i386_tdep): Likewise. * i386bsd-tdep.c (_initialize_i386bsd_tdep): Likewise. * i386gnu-tdep.c (_initialize_i386gnu_tdep): Likewise. * i386ly-tdep.c (_initialize_i386lynx_tdep): Renamed from _initialize_i386bsd_tdep and updated likewise. * i386nbsd-tdep.c (_initialize_i386nbsd_tdep): Likewise. * i386obsd-tdep.c (_initialize_i386obsd_tdep): Likewise. * mips-irix-tdep.c (_initialize_mips_irix_tdep): Likewise. * mips-linux-tdep.c (_initialize_mips_linux_tdep): Likewise. * mipsnbsd-tdep.c (_initialize_mipsnbsd__tdep): Likewise. * ns32knbsd-tdep.c (_initialize_ns32kmnsd_tdep): Likewise. * ppc-linux-tdep.c (_initialize_ppc_linux_tdep): Likewise. * ppcnbsd-tdep.c (_initialize_ppcnbsd_tdep): Likewise. * shnbsd-tdep.c (_initialize_shnbsd_tdep): Likewise. * sparcnbsd-tdep.c (_initialize_sparcnbsd_tdep): Likewise.
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gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_IRIX,
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mips_irix_init_abi);
}