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gdbserver: LoongArch: Add floating-point support

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This commit adds floating-point support for LoongArch gdbserver.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
This commit is contained in:
Tiezhu Yang
2022-07-12 10:35:35 +08:00
parent 657a50227b
commit 3f6227c2f4
1 changed files with 32 additions and 0 deletions
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32
gdbserver/linux-loongarch-low.cc
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@ -120,10 +120,42 @@ loongarch_store_gregset (struct regcache *regcache, const void *buf)
supply_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
}
/* Collect FPRs from REGCACHE into BUF. */
static void
loongarch_fill_fpregset (struct regcache *regcache, void *buf)
{
gdb_byte *regbuf = nullptr;
int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
{
regbuf = (gdb_byte *)buf + fprsize * i;
collect_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
}
}
/* Supply FPRs from BUF into REGCACHE. */
static void
loongarch_store_fpregset (struct regcache *regcache, const void *buf)
{
const gdb_byte *regbuf = nullptr;
int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
{
regbuf = (const gdb_byte *)buf + fprsize * i;
supply_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
}
}
/* LoongArch/Linux regsets. */
static struct regset_info loongarch_regsets[] = {
{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, sizeof (elf_gregset_t),
GENERAL_REGS, loongarch_fill_gregset, loongarch_store_gregset },
{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, sizeof (elf_fpregset_t),
FP_REGS, loongarch_fill_fpregset, loongarch_store_fpregset },
NULL_REGSET
};