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gdbserver: LoongArch: Simplify code with register number macros

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Move "enum loongarch_regnum" to gdb/arch/loongarch.h so that the
macro definitions can be used in gdbserver/linux-loongarch-low.cc
to simplify the code.

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
This commit is contained in:
Youling Tang 2022-07-10 10:22:33 +08:00 committed by Tiezhu Yang
parent e5c0531cfe
commit 3eba483364
3 changed files with 25 additions and 31 deletions
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16
gdb/arch/loongarch.h
View File

@ -22,6 +22,22 @@
#include "gdbsupport/tdesc.h"
/* Register numbers of various important registers. */
enum
{
LOONGARCH_RA_REGNUM = 1, /* Return Address. */
LOONGARCH_SP_REGNUM = 3, /* Stack Pointer. */
LOONGARCH_A0_REGNUM = 4, /* First Argument/Return Value. */
LOONGARCH_A7_REGNUM = 11, /* Seventh Argument/Syscall Number. */
LOONGARCH_FP_REGNUM = 22, /* Frame Pointer. */
LOONGARCH_ORIG_A0_REGNUM = 32, /* Syscall's original arg0. */
LOONGARCH_PC_REGNUM = 33, /* Program Counter. */
LOONGARCH_BADV_REGNUM = 34, /* Bad Vaddr for Addressing Exception. */
LOONGARCH_LINUX_NUM_GREGSET = 45, /* 32 GPR, ORIG_A0, PC, BADV, RESERVED 10. */
LOONGARCH_ARG_REGNUM = 8, /* r4-r11: general-purpose argument registers.
f0-f7: floating-point argument registers. */
};
/* The set of LoongArch architectural features that we track that impact how
we configure the actual gdbarch instance. We hold one of these in the
gdbarch_tdep structure, and use it to distinguish between different

16
gdb/loongarch-tdep.h
View File

@ -27,22 +27,6 @@
#include "elf/loongarch.h"
#include "opcode/loongarch.h"
/* Register numbers of various important registers. */
enum
{
LOONGARCH_RA_REGNUM = 1, /* Return Address. */
LOONGARCH_SP_REGNUM = 3, /* Stack Pointer. */
LOONGARCH_A0_REGNUM = 4, /* First Argument/Return Value. */
LOONGARCH_A7_REGNUM = 11, /* Seventh Argument/Syscall Number. */
LOONGARCH_FP_REGNUM = 22, /* Frame Pointer. */
LOONGARCH_ORIG_A0_REGNUM = 32, /* Syscall's original arg0. */
LOONGARCH_PC_REGNUM = 33, /* Program Counter. */
LOONGARCH_BADV_REGNUM = 34, /* Bad Vaddr for Addressing Exception. */
LOONGARCH_LINUX_NUM_GREGSET = 45, /* 32 GPR, ORIG_A0, PC, BADV, RESERVED 10. */
LOONGARCH_ARG_REGNUM = 8, /* r4-r11: general-purpose argument registers.
f0-f7: floating-point argument registers. */
};
/* Register set definitions. */
extern const struct regset loongarch_gregset;

24
gdbserver/linux-loongarch-low.cc
View File

@ -94,15 +94,13 @@ loongarch_target::low_arch_setup ()
static void
loongarch_fill_gregset (struct regcache *regcache, void *buf)
{
const struct target_desc *tdesc = regcache->tdesc;
elf_gregset_t *regset = (elf_gregset_t *) buf;
int regno = find_regno (tdesc, "r0");
int i;
for (i = 1; i < 32; i++)
collect_register (regcache, regno + i, *regset + i);
collect_register_by_name (regcache, "pc", *regset + 32);
collect_register_by_name (regcache, "badv", *regset + 33);
collect_register (regcache, i, *regset + i);
collect_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
collect_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
}
/* Supply GPRs from BUF into REGCACHE. */
@ -110,16 +108,14 @@ loongarch_fill_gregset (struct regcache *regcache, void *buf)
static void
loongarch_store_gregset (struct regcache *regcache, const void *buf)
{
const struct target_desc *tdesc = regcache->tdesc;
const elf_gregset_t *regset = (const elf_gregset_t *) buf;
int regno = find_regno (tdesc, "r0");
int i;
supply_register_zeroed (regcache, regno);
supply_register_zeroed (regcache, 0);
for (i = 1; i < 32; i++)
supply_register (regcache, regno + i, *regset + i);
supply_register_by_name (regcache, "pc", *regset + 32);
supply_register_by_name (regcache, "badv", *regset + 33);
supply_register (regcache, i, *regset + i);
supply_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
supply_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
}
/* LoongArch/Linux regsets. */
@ -158,11 +154,9 @@ loongarch_target::get_regs_info ()
bool
loongarch_target::low_fetch_register (regcache *regcache, int regno)
{
const struct target_desc *tdesc = regcache->tdesc;
if (regno != find_regno (tdesc, "r0"))
if (regno != 0)
return false;
supply_register_zeroed (regcache, regno);
supply_register_zeroed (regcache, 0);
return true;
}