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gdb:csky save fpu and vdsp info to struct csky_gdbarch_tdep

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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
This commit is contained in:
Jiangshuai Li 2022-06-01 14:46:01 +08:00
parent b0de9ed86f
commit 68538bbeaa
2 changed files with 43 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

42
gdb/csky-tdep.c
View file

@ -2154,16 +2154,52 @@ 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);

5
gdb/csky-tdep.h
View file

@ -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. */