From: Jiangshuai Li <jiangshuai_li@c-sky.com>
To: gdb-patches@sourceware.org
Cc: Jiangshuai Li <jiangshuai_li@c-sky.com>
Subject: [PATCH v2] gdb:csky save fpu and vdsp info to struct csky_gdbarch_tdep
Date: Wed, 23 Mar 2022 20:26:16 +0800 [thread overview]
Message-ID: <20220323122616.6041-1-jiangshuai_li@c-sky.com> (raw)
First, add three variables fpu_abi, fpu_hardfp and vdsp_version
to csky_gdbarch_tdep. They will be initialized from info.abfd in
cskg_gdbarch_init.
Now, they are just used to find a candidate among the list of pre-declared
architectures
Later, they will be used in gdbarch_return_value and gdbarch_push_dummy_call
for funtions described below:
fpu_abi: to check if the bfd is using VAL_CSKY_FPU_ABI_HARD or
VAL_CSKY_FPU_ABI_SOFT
fpu_hardfp: to check if the bfd is using VAL_CSKY_FPU_HARDFP_SINGLE
or VAL_CSKY_FPU_HARDFP_DOUBLE
vdsp_version: to check if a function is returned with CSKY_VRET_REGNUM
---
gdb/csky-tdep.c | 42 +++++++++++++++++++++++++++++++++++++++---
gdb/csky-tdep.h | 5 ++++-
2 files changed, 43 insertions(+), 4 deletions(-)
diff --git a/gdb/csky-tdep.c b/gdb/csky-tdep.c
index cba0065fa53..04f558cf14b 100644
--- a/gdb/csky-tdep.c
+++ b/gdb/csky-tdep.c
@@ -2157,16 +2157,52 @@ static struct gdbarch *
csky_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
struct gdbarch *gdbarch;
+ /* Analyze info.abfd. */
+ unsigned int fpu_abi = 0;
+ unsigned int vdsp_version = 0;
+ unsigned int fpu_hardfp = 0;
+
+ /* When the type of bfd file is srec(or any files are not elf),
+ the E_FLAGS will be not credible. */
+ if (info.abfd != NULL && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
+ {
+ /* Get FPU, VDSP build options. */
+ fpu_abi = bfd_elf_get_obj_attr_int (info.abfd,
+ OBJ_ATTR_PROC,
+ Tag_CSKY_FPU_ABI);
+ vdsp_version = bfd_elf_get_obj_attr_int (info.abfd,
+ OBJ_ATTR_PROC,
+ Tag_CSKY_VDSP_VERSION);
+ fpu_hardfp = bfd_elf_get_obj_attr_int (info.abfd,
+ OBJ_ATTR_PROC,
+ Tag_CSKY_FPU_HARDFP);
+ }
/* Find a candidate among the list of pre-declared architectures. */
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return arches->gdbarch;
+ for (arches = gdbarch_list_lookup_by_info (arches, &info);
+ arches != NULL;
+ arches = gdbarch_list_lookup_by_info (arches->next, &info))
+ {
+ csky_gdbarch_tdep *tdep
+ = (csky_gdbarch_tdep *) gdbarch_tdep (arches->gdbarch);
+ if (fpu_abi != tdep->fpu_abi)
+ continue;
+ if (vdsp_version != tdep->vdsp_version)
+ continue;
+ if (fpu_hardfp != tdep->fpu_hardfp)
+ continue;
+
+ /* Found a match. */
+ return arches->gdbarch;
+ }
/* None found, create a new architecture from the information
provided. */
csky_gdbarch_tdep *tdep = new csky_gdbarch_tdep;
gdbarch = gdbarch_alloc (&info, tdep);
+ tdep->fpu_abi = fpu_abi;
+ tdep->vdsp_version = vdsp_version;
+ tdep->fpu_hardfp = fpu_hardfp;
/* Target data types. */
set_gdbarch_ptr_bit (gdbarch, 32);
diff --git a/gdb/csky-tdep.h b/gdb/csky-tdep.h
index 7898e0d325b..d0e5fc09270 100644
--- a/gdb/csky-tdep.h
+++ b/gdb/csky-tdep.h
@@ -33,7 +33,10 @@ enum lr_type_t
/* Target-dependent structure in gdbarch. */
struct csky_gdbarch_tdep : gdbarch_tdep
{
- /* This is Unused. */
+ /* Save FPU, VDSP ABI. */
+ unsigned int fpu_abi;
+ unsigned int fpu_hardfp;
+ unsigned int vdsp_version;
};
/* Instruction sizes. */
--
2.17.1
next reply other threads:[~2022-03-23 12:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-23 12:26 Jiangshuai Li [this message]
2022-03-23 12:45 ` Simon Marchi
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