mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-14 04:43:38 +08:00
3666a04883
This commits the result of running gdb/copyright.py as per our Start of New Year procedure... gdb/ChangeLog Update copyright year range in copyright header of all GDB files.
182 lines
5.6 KiB
C
182 lines
5.6 KiB
C
/* Ravenscar SPARC target support.
|
|
|
|
Copyright (C) 2004-2021 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 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 "gdbcore.h"
|
|
#include "regcache.h"
|
|
#include "sparc-tdep.h"
|
|
#include "inferior.h"
|
|
#include "ravenscar-thread.h"
|
|
#include "sparc-ravenscar-thread.h"
|
|
#include "gdbarch.h"
|
|
|
|
struct sparc_ravenscar_ops : public ravenscar_arch_ops
|
|
{
|
|
void fetch_registers (struct regcache *, int) override;
|
|
void store_registers (struct regcache *, int) override;
|
|
};
|
|
|
|
/* Register offsets from a referenced address (exempli gratia the
|
|
Thread_Descriptor). The referenced address depends on the register
|
|
number. The Thread_Descriptor layout and the stack layout are documented
|
|
in the GNAT sources, in sparc-bb.h. */
|
|
|
|
static const int sparc_register_offsets[] =
|
|
{
|
|
/* G0 - G7 */
|
|
-1, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
|
|
/* O0 - O7 */
|
|
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
|
|
/* L0 - L7 */
|
|
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
|
|
/* I0 - I7 */
|
|
0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
|
|
/* F0 - F31 */
|
|
0x50, 0x54, 0x58, 0x5C, 0x60, 0x64, 0x68, 0x6C,
|
|
0x70, 0x74, 0x78, 0x7C, 0x80, 0x84, 0x88, 0x8C,
|
|
0x90, 0x94, 0x99, 0x9C, 0xA0, 0xA4, 0xA8, 0xAC,
|
|
0xB0, 0xB4, 0xBB, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC,
|
|
/* Y PSR WIM TBR PC NPC FPSR CPSR */
|
|
0x40, 0x20, 0x44, -1, 0x1C, -1, 0x4C, -1
|
|
};
|
|
|
|
/* supply register REGNUM, which has been saved on REGISTER_ADDR, to the
|
|
regcache. */
|
|
|
|
static void
|
|
supply_register_at_address (struct regcache *regcache, int regnum,
|
|
CORE_ADDR register_addr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
int buf_size = register_size (gdbarch, regnum);
|
|
gdb_byte *buf;
|
|
|
|
buf = (gdb_byte *) alloca (buf_size);
|
|
read_memory (register_addr, buf, buf_size);
|
|
regcache->raw_supply (regnum, buf);
|
|
}
|
|
|
|
/* Return true if, for a non-running thread, REGNUM has been saved on the
|
|
stack. */
|
|
|
|
static int
|
|
register_on_stack_p (int regnum)
|
|
{
|
|
return (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
|
|
|| (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM);
|
|
}
|
|
|
|
/* Return true if, for a non-running thread, REGNUM has been saved on the
|
|
Thread_Descriptor. */
|
|
|
|
static int
|
|
register_in_thread_descriptor_p (int regnum)
|
|
{
|
|
return (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
|
|
|| (regnum == SPARC32_PSR_REGNUM)
|
|
|| (regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
|
|
|| (regnum == SPARC32_Y_REGNUM)
|
|
|| (regnum == SPARC32_WIM_REGNUM)
|
|
|| (regnum == SPARC32_FSR_REGNUM)
|
|
|| (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F0_REGNUM + 31)
|
|
|| (regnum == SPARC32_PC_REGNUM);
|
|
}
|
|
|
|
/* to_fetch_registers when inferior_ptid is different from the running
|
|
thread. */
|
|
|
|
void
|
|
sparc_ravenscar_ops::fetch_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
const int sp_regnum = gdbarch_sp_regnum (gdbarch);
|
|
const int num_regs = gdbarch_num_regs (gdbarch);
|
|
int current_regnum;
|
|
CORE_ADDR current_address;
|
|
CORE_ADDR thread_descriptor_address;
|
|
ULONGEST stack_address;
|
|
|
|
/* The tid is the thread_id field, which is a pointer to the thread. */
|
|
thread_descriptor_address = (CORE_ADDR) inferior_ptid.tid ();
|
|
|
|
/* Read the saved SP in the context buffer. */
|
|
current_address = thread_descriptor_address
|
|
+ sparc_register_offsets [sp_regnum];
|
|
supply_register_at_address (regcache, sp_regnum, current_address);
|
|
regcache_cooked_read_unsigned (regcache, sp_regnum, &stack_address);
|
|
|
|
/* Read registers. */
|
|
for (current_regnum = 0; current_regnum < num_regs; current_regnum ++)
|
|
{
|
|
if (register_in_thread_descriptor_p (current_regnum))
|
|
{
|
|
current_address = thread_descriptor_address
|
|
+ sparc_register_offsets [current_regnum];
|
|
supply_register_at_address (regcache, current_regnum,
|
|
current_address);
|
|
}
|
|
else if (register_on_stack_p (current_regnum))
|
|
{
|
|
current_address = stack_address
|
|
+ sparc_register_offsets [current_regnum];
|
|
supply_register_at_address (regcache, current_regnum,
|
|
current_address);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* to_store_registers when inferior_ptid is different from the running
|
|
thread. */
|
|
|
|
void
|
|
sparc_ravenscar_ops::store_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
int buf_size = register_size (gdbarch, regnum);
|
|
gdb_byte buf[buf_size];
|
|
ULONGEST register_address;
|
|
|
|
if (register_in_thread_descriptor_p (regnum))
|
|
register_address =
|
|
inferior_ptid.tid () + sparc_register_offsets [regnum];
|
|
else if (register_on_stack_p (regnum))
|
|
{
|
|
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM,
|
|
®ister_address);
|
|
register_address += sparc_register_offsets [regnum];
|
|
}
|
|
else
|
|
return;
|
|
|
|
regcache->raw_collect (regnum, buf);
|
|
write_memory (register_address,
|
|
buf,
|
|
buf_size);
|
|
}
|
|
|
|
static struct sparc_ravenscar_ops sparc_ravenscar_ops;
|
|
|
|
/* Register ravenscar_arch_ops in GDBARCH. */
|
|
|
|
void
|
|
register_sparc_ravenscar_ops (struct gdbarch *gdbarch)
|
|
{
|
|
set_gdbarch_ravenscar_ops (gdbarch, &sparc_ravenscar_ops);
|
|
}
|