From 3f6227c2f40a3e6009c60483f464e349d30145bb Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Tue, 12 Jul 2022 10:35:35 +0800 Subject: [PATCH] gdbserver: LoongArch: Add floating-point support This commit adds floating-point support for LoongArch gdbserver. Signed-off-by: Tiezhu Yang --- gdbserver/linux-loongarch-low.cc | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/gdbserver/linux-loongarch-low.cc b/gdbserver/linux-loongarch-low.cc index 91826b42361..7180f315b11 100644 --- a/gdbserver/linux-loongarch-low.cc +++ b/gdbserver/linux-loongarch-low.cc @@ -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 }; -- 2.30.2