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authorTiezhu Yang <yangtiezhu@loongson.cn>2022-07-12 10:35:35 +0800
committerTiezhu Yang <yangtiezhu@loongson.cn>2022-07-12 20:14:52 +0800
commit3f6227c2f40a3e6009c60483f464e349d30145bb (patch)
tree35c7f82a5ec6d9f1666b1da979a8006c4f946d59 /gdbserver
parent657a50227bbd835c83aadc2405e649c4b982c241 (diff)
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gdbserver: LoongArch: Add floating-point support
This commit adds floating-point support for LoongArch gdbserver. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Diffstat (limited to 'gdbserver')
-rw-r--r--gdbserver/linux-loongarch-low.cc32
1 files changed, 32 insertions, 0 deletions
diff --git a/gdbserver/linux-loongarch-low.cc b/gdbserver/linux-loongarch-low.cc
index 91826b4..7180f31 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
};