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binutils-gdb/gdb/loongarch-linux-tdep.c
Tom Tromey bd2b40ac12 Change GDB to use frame_info_ptr 
This changes GDB to use frame_info_ptr instead of frame_info *
The substitution was done with multiple sequential `sed` commands:

sed 's/^struct frame_info;/class frame_info_ptr;/'
sed 's/struct frame_info \*/frame_info_ptr /g' - which left some
    issues in a few files, that were manually fixed.
sed 's/\<frame_info \*/frame_info_ptr /g'
sed 's/frame_info_ptr $/frame_info_ptr/g' - used to remove whitespace
    problems.

The changed files were then manually checked and some 'sed' changes
undone, some constructors and some gets were added, according to what
made sense, and what Tromey originally did

Co-Authored-By: Bruno Larsen <blarsen@redhat.com>
Approved-by: Tom Tomey <tom@tromey.com>
2022-10-10 11:57:10 +02:00

343 lines
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/* Target-dependent code for GNU/Linux on LoongArch processors.
Copyright (C) 2022 Free Software Foundation, Inc.
Contributed by Loongson Ltd.
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
(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/>. */
#include "defs.h"
#include "glibc-tdep.h"
#include "inferior.h"
#include "linux-tdep.h"
#include "loongarch-tdep.h"
#include "solib-svr4.h"
#include "target-descriptions.h"
#include "trad-frame.h"
#include "tramp-frame.h"
/* Unpack an elf_gregset_t into GDB's register cache. */
static void
loongarch_supply_gregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *gprs, size_t len)
{
int regsize = register_size (regcache->arch (), 0);
const gdb_byte *buf = nullptr;
if (regnum == -1)
{
regcache->raw_supply_zeroed (0);
for (int i = 1; i < 32; i++)
{
buf = (const gdb_byte*) gprs + regsize * i;
regcache->raw_supply (i, (const void *) buf);
}
buf = (const gdb_byte*) gprs + regsize * LOONGARCH_ORIG_A0_REGNUM;
regcache->raw_supply (LOONGARCH_ORIG_A0_REGNUM, (const void *) buf);
buf = (const gdb_byte*) gprs + regsize * LOONGARCH_PC_REGNUM;
regcache->raw_supply (LOONGARCH_PC_REGNUM, (const void *) buf);
buf = (const gdb_byte*) gprs + regsize * LOONGARCH_BADV_REGNUM;
regcache->raw_supply (LOONGARCH_BADV_REGNUM, (const void *) buf);
}
else if (regnum == 0)
regcache->raw_supply_zeroed (0);
else if ((regnum > 0 && regnum < 32)
|| regnum == LOONGARCH_ORIG_A0_REGNUM
|| regnum == LOONGARCH_PC_REGNUM
|| regnum == LOONGARCH_BADV_REGNUM)
{
buf = (const gdb_byte*) gprs + regsize * regnum;
regcache->raw_supply (regnum, (const void *) buf);
}
}
/* Pack the GDB's register cache value into an elf_gregset_t. */
static void
loongarch_fill_gregset (const struct regset *regset,
const struct regcache *regcache, int regnum,
void *gprs, size_t len)
{
int regsize = register_size (regcache->arch (), 0);
gdb_byte *buf = nullptr;
if (regnum == -1)
{
for (int i = 0; i < 32; i++)
{
buf = (gdb_byte *) gprs + regsize * i;
regcache->raw_collect (i, (void *) buf);
}
buf = (gdb_byte *) gprs + regsize * LOONGARCH_ORIG_A0_REGNUM;
regcache->raw_collect (LOONGARCH_ORIG_A0_REGNUM, (void *) buf);
buf = (gdb_byte *) gprs + regsize * LOONGARCH_PC_REGNUM;
regcache->raw_collect (LOONGARCH_PC_REGNUM, (void *) buf);
buf = (gdb_byte *) gprs + regsize * LOONGARCH_BADV_REGNUM;
regcache->raw_collect (LOONGARCH_BADV_REGNUM, (void *) buf);
}
else if ((regnum >= 0 && regnum < 32)
|| regnum == LOONGARCH_ORIG_A0_REGNUM
|| regnum == LOONGARCH_PC_REGNUM
|| regnum == LOONGARCH_BADV_REGNUM)
{
buf = (gdb_byte *) gprs + regsize * regnum;
regcache->raw_collect (regnum, (void *) buf);
}
}
/* Define the general register regset. */
const struct regset loongarch_gregset =
{
nullptr,
loongarch_supply_gregset,
loongarch_fill_gregset,
};
/* Unpack an elf_fpregset_t into GDB's register cache. */
static void
loongarch_supply_fpregset (const struct regset *r,
struct regcache *regcache, int regnum,
const void *fprs, size_t len)
{
const gdb_byte *buf = nullptr;
int fprsize = register_size (regcache->arch (), LOONGARCH_FIRST_FP_REGNUM);
int fccsize = register_size (regcache->arch (), LOONGARCH_FIRST_FCC_REGNUM);
if (regnum == -1)
{
for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
{
buf = (const gdb_byte *)fprs + fprsize * i;
regcache->raw_supply (LOONGARCH_FIRST_FP_REGNUM + i, (const void *)buf);
}
for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
{
buf = (const gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * i;
regcache->raw_supply (LOONGARCH_FIRST_FCC_REGNUM + i, (const void *)buf);
}
buf = (const gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * LOONGARCH_LINUX_NUM_FCC;
regcache->raw_supply (LOONGARCH_FCSR_REGNUM, (const void *)buf);
}
else if (regnum >= LOONGARCH_FIRST_FP_REGNUM && regnum < LOONGARCH_FIRST_FCC_REGNUM)
{
buf = (const gdb_byte *)fprs + fprsize * (regnum - LOONGARCH_FIRST_FP_REGNUM);
regcache->raw_supply (regnum, (const void *)buf);
}
else if (regnum >= LOONGARCH_FIRST_FCC_REGNUM && regnum < LOONGARCH_FCSR_REGNUM)
{
buf = (const gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * (regnum - LOONGARCH_FIRST_FCC_REGNUM);
regcache->raw_supply (regnum, (const void *)buf);
}
else if (regnum == LOONGARCH_FCSR_REGNUM)
{
buf = (const gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * LOONGARCH_LINUX_NUM_FCC;
regcache->raw_supply (regnum, (const void *)buf);
}
}
/* Pack the GDB's register cache value into an elf_fpregset_t. */
static void
loongarch_fill_fpregset (const struct regset *r,
const struct regcache *regcache, int regnum,
void *fprs, size_t len)
{
gdb_byte *buf = nullptr;
int fprsize = register_size (regcache->arch (), LOONGARCH_FIRST_FP_REGNUM);
int fccsize = register_size (regcache->arch (), LOONGARCH_FIRST_FCC_REGNUM);
if (regnum == -1)
{
for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
{
buf = (gdb_byte *)fprs + fprsize * i;
regcache->raw_collect (LOONGARCH_FIRST_FP_REGNUM + i, (void *)buf);
}
for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
{
buf = (gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * i;
regcache->raw_collect (LOONGARCH_FIRST_FCC_REGNUM + i, (void *)buf);
}
buf = (gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * LOONGARCH_LINUX_NUM_FCC;
regcache->raw_collect (LOONGARCH_FCSR_REGNUM, (void *)buf);
}
else if (regnum >= LOONGARCH_FIRST_FP_REGNUM && regnum < LOONGARCH_FIRST_FCC_REGNUM)
{
buf = (gdb_byte *)fprs + fprsize * (regnum - LOONGARCH_FIRST_FP_REGNUM);
regcache->raw_collect (regnum, (void *)buf);
}
else if (regnum >= LOONGARCH_FIRST_FCC_REGNUM && regnum < LOONGARCH_FCSR_REGNUM)
{
buf = (gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * (regnum - LOONGARCH_FIRST_FCC_REGNUM);
regcache->raw_collect (regnum, (void *)buf);
}
else if (regnum == LOONGARCH_FCSR_REGNUM)
{
buf = (gdb_byte *)fprs + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * LOONGARCH_LINUX_NUM_FCC;
regcache->raw_collect (regnum, (void *)buf);
}
}
/* Define the FP register regset. */
const struct regset loongarch_fpregset =
{
nullptr,
loongarch_supply_fpregset,
loongarch_fill_fpregset,
};
/* Implement the "init" method of struct tramp_frame. */
#define LOONGARCH_RT_SIGFRAME_UCONTEXT_OFFSET 128
#define LOONGARCH_UCONTEXT_SIGCONTEXT_OFFSET 176
static void
loongarch_linux_rt_sigframe_init (const struct tramp_frame *self,
frame_info_ptr this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
CORE_ADDR frame_sp = get_frame_sp (this_frame);
CORE_ADDR sigcontext_base = (frame_sp + LOONGARCH_RT_SIGFRAME_UCONTEXT_OFFSET
+ LOONGARCH_UCONTEXT_SIGCONTEXT_OFFSET);
trad_frame_set_reg_addr (this_cache, LOONGARCH_PC_REGNUM, sigcontext_base);
for (int i = 0; i < 32; i++)
trad_frame_set_reg_addr (this_cache, i, sigcontext_base + 8 + i * 8);
trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
}
/* li.w a7, __NR_rt_sigreturn */
#define LOONGARCH_INST_LIW_A7_RT_SIGRETURN 0x03822c0b
/* syscall 0 */
#define LOONGARCH_INST_SYSCALL 0x002b0000
static const struct tramp_frame loongarch_linux_rt_sigframe =
{
SIGTRAMP_FRAME,
4,
{
{ LOONGARCH_INST_LIW_A7_RT_SIGRETURN, ULONGEST_MAX },
{ LOONGARCH_INST_SYSCALL, ULONGEST_MAX },
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
loongarch_linux_rt_sigframe_init,
nullptr
};
/* Implement the "iterate_over_regset_sections" gdbarch method. */
static void
loongarch_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
int gprsize = register_size (gdbarch, 0);
int fprsize = register_size (gdbarch, LOONGARCH_FIRST_FP_REGNUM);
int fccsize = register_size (gdbarch, LOONGARCH_FIRST_FCC_REGNUM);
int fcsrsize = register_size (gdbarch, LOONGARCH_FCSR_REGNUM);
int fpsize = fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
fccsize * LOONGARCH_LINUX_NUM_FCC + fcsrsize;
cb (".reg", LOONGARCH_LINUX_NUM_GREGSET * gprsize,
LOONGARCH_LINUX_NUM_GREGSET * gprsize, &loongarch_gregset, nullptr, cb_data);
cb (".reg2", fpsize, fpsize, &loongarch_fpregset, nullptr, cb_data);
}
/* The following value is derived from __NR_rt_sigreturn in
<include/uapi/asm-generic/unistd.h> from the Linux source tree. */
#define LOONGARCH_NR_rt_sigreturn 139
/* When FRAME is at a syscall instruction, return the PC of the next
instruction to be executed. */
static CORE_ADDR
loongarch_linux_syscall_next_pc (frame_info_ptr frame)
{
const CORE_ADDR pc = get_frame_pc (frame);
ULONGEST a7 = get_frame_register_unsigned (frame, LOONGARCH_A7_REGNUM);
/* If we are about to make a sigreturn syscall, use the unwinder to
decode the signal frame. */
if (a7 == LOONGARCH_NR_rt_sigreturn)
return frame_unwind_caller_pc (frame);
return pc + 4;
}
/* Initialize LoongArch Linux ABI info. */
static void
loongarch_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
loongarch_gdbarch_tdep *tdep = gdbarch_tdep<loongarch_gdbarch_tdep> (gdbarch);
linux_init_abi (info, gdbarch, 0);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
info.bfd_arch_info->bits_per_address == 32
? linux_ilp32_fetch_link_map_offsets
: linux_lp64_fetch_link_map_offsets);
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
/* GNU/Linux uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map);
/* Prepend tramp frame unwinder for signal. */
tramp_frame_prepend_unwinder (gdbarch, &loongarch_linux_rt_sigframe);
/* Core file support. */
set_gdbarch_iterate_over_regset_sections (gdbarch, loongarch_iterate_over_regset_sections);
tdep->syscall_next_pc = loongarch_linux_syscall_next_pc;
}
/* Initialize LoongArch Linux target support. */
void _initialize_loongarch_linux_tdep ();
void
_initialize_loongarch_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_loongarch, bfd_mach_loongarch32,
GDB_OSABI_LINUX, loongarch_linux_init_abi);
gdbarch_register_osabi (bfd_arch_loongarch, bfd_mach_loongarch64,
GDB_OSABI_LINUX, loongarch_linux_init_abi);
}
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