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| author | Feiyang Chen <chenfeiyang@loongson.cn> | 2022-08-02 17:16:56 +0800 |
|---|---|---|
| committer | Tiezhu Yang <yangtiezhu@loongson.cn> | 2022-08-09 22:22:23 +0800 |
| commit | ea3352172ec868b821fa34b31ba8128bde735405 (patch) | |
| tree | 60452294ef7a7f9524a174b0c5fa1f2ddd5ac7b0 /gdb/arch | |
| parent | a88c79b77036e4778e70d62081c3cfd1044bb8e3 (diff) | |
| download | gdb-ea3352172ec868b821fa34b31ba8128bde735405.zip gdb-ea3352172ec868b821fa34b31ba8128bde735405.tar.gz gdb-ea3352172ec868b821fa34b31ba8128bde735405.tar.bz2 | |
gdb/gdbserver: LoongArch: Improve implementation of fcc registers
The current implementation of the fcc register is referenced to the
user_fp_state structure of the kernel uapi [1].
struct user_fp_state {
uint64_t fpr[32];
uint64_t fcc;
uint32_t fcsr;
};
But it is mistakenly defined as a 64-bit fputype register, resulting
in a confusing output of "info register".
(gdb) info register
...
fcc {f = 0x0, d = 0x0} {f = 0, d = 0}
...
According to "Condition Flag Register" in "LoongArch Reference Manual"
[2], there are 8 condition flag registers of size 1. Use 8 registers of
uint8 to make it easier for users to view the fcc register groups.
(gdb) info register
...
fcc0 0x1 1
fcc1 0x0 0
fcc2 0x0 0
fcc3 0x0 0
fcc4 0x0 0
fcc5 0x0 0
fcc6 0x0 0
fcc7 0x0 0
...
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/loongarch/include/uapi/asm/ptrace.h
[2] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#_condition_flag_register
Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Diffstat (limited to 'gdb/arch')
| -rw-r--r-- | gdb/arch/loongarch.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gdb/arch/loongarch.h b/gdb/arch/loongarch.h index 799595b..eae061f 100644 --- a/gdb/arch/loongarch.h +++ b/gdb/arch/loongarch.h @@ -37,9 +37,10 @@ enum loongarch_regnum LOONGARCH_ARG_REGNUM = 8, /* r4-r11: general-purpose argument registers. f0-f7: floating-point argument registers. */ LOONGARCH_FIRST_FP_REGNUM = LOONGARCH_LINUX_NUM_GREGSET, - LOONGARCH_FCC_REGNUM = LOONGARCH_FIRST_FP_REGNUM + 32, - LOONGARCH_FCSR_REGNUM = LOONGARCH_FCC_REGNUM + 1, - LOONGARCH_LINUX_NUM_FPREGSET = 34, + LOONGARCH_LINUX_NUM_FPREGSET = 32, + LOONGARCH_FIRST_FCC_REGNUM = LOONGARCH_FIRST_FP_REGNUM + LOONGARCH_LINUX_NUM_FPREGSET, + LOONGARCH_LINUX_NUM_FCC = 8, + LOONGARCH_FCSR_REGNUM = LOONGARCH_FIRST_FCC_REGNUM + LOONGARCH_LINUX_NUM_FCC, }; enum loongarch_fputype |