From 0373a76af6b8ef949b9ca8aaa6325fbde0948603 Mon Sep 17 00:00:00 2001 From: Hui Li Date: Thu, 16 Feb 2023 09:22:25 +0800 Subject: [PATCH] gdb: LoongArch: Support reg aliases in info reg command According to LoongArch ELF ABI specification [1], support the register aliases in "info register" command. Without this patch: ``` (gdb) info reg a0 Invalid register `a0' ``` With this patch: ``` (gdb) info reg a0 a0 0x1 1 ``` [1] https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_register_convention Signed-off-by: Hui Li Signed-off-by: Tiezhu Yang --- gdb/loongarch-tdep.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/gdb/loongarch-tdep.c b/gdb/loongarch-tdep.c index 67ea5494d90..f5ddad0ba65 100644 --- a/gdb/loongarch-tdep.c +++ b/gdb/loongarch-tdep.c @@ -387,6 +387,14 @@ loongarch_software_single_step (struct regcache *regcache) return {next_pc}; } +/* Callback function for user_reg_add. */ + +static struct value * +value_of_loongarch_user_reg (frame_info_ptr frame, const void *baton) +{ + return value_of_register ((long long) baton, frame); +} + /* Implement the frame_align gdbarch method. */ static CORE_ADDR @@ -1589,6 +1597,19 @@ loongarch_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) info.target_desc = tdesc; info.tdesc_data = tdesc_data.get (); + for (int i = 0; i < ARRAY_SIZE (loongarch_r_lp64_name); ++i) + if (loongarch_r_lp64_name[i][0] != '\0') + user_reg_add (gdbarch, loongarch_r_lp64_name[i] + 1, + value_of_loongarch_user_reg, (void *) (size_t) i); + + for (int i = 0; i < ARRAY_SIZE (loongarch_f_lp64_name); ++i) + { + if (loongarch_f_lp64_name[i][0] != '\0') + user_reg_add (gdbarch, loongarch_f_lp64_name[i] + 1, + value_of_loongarch_user_reg, + (void *) (size_t) (LOONGARCH_FIRST_FP_REGNUM + i)); + } + /* Information about registers. */ set_gdbarch_num_regs (gdbarch, regnum); set_gdbarch_sp_regnum (gdbarch, LOONGARCH_SP_REGNUM); -- 2.30.2