/* RISC-V disassembler
- Copyright (C) 2011-2018 Free Software Foundation, Inc.
+ Copyright (C) 2011-2021 Free Software Foundation, Inc.
Contributed by Andrew Waterman (andrew@sifive.com).
Based on MIPS target.
#include "opintl.h"
#include "elf-bfd.h"
#include "elf/riscv.h"
+#include "elfxx-riscv.h"
-#include <stdint.h>
+#include "bfd_stdint.h"
#include <ctype.h>
+static enum riscv_priv_spec_class default_priv_spec = PRIV_SPEC_CLASS_NONE;
+
struct riscv_private_data
{
bfd_vma gp;
no_aliases = 0;
}
-static void
-parse_riscv_dis_option (const char *option)
+static bfd_boolean
+parse_riscv_dis_option_without_args (const char *option)
{
if (strcmp (option, "no-aliases") == 0)
no_aliases = 1;
riscv_gpr_names = riscv_gpr_names_numeric;
riscv_fpr_names = riscv_fpr_names_numeric;
}
+ else
+ return FALSE;
+ return TRUE;
+}
+
+static void
+parse_riscv_dis_option (const char *option)
+{
+ char *equal, *value;
+
+ if (parse_riscv_dis_option_without_args (option))
+ return;
+
+ equal = strchr (option, '=');
+ if (equal == NULL)
+ {
+ /* The option without '=' should be defined above. */
+ opcodes_error_handler (_("unrecognized disassembler option: %s"), option);
+ return;
+ }
+ if (equal == option
+ || *(equal + 1) == '\0')
+ {
+ /* Invalid options with '=', no option name before '=',
+ and no value after '='. */
+ opcodes_error_handler (_("unrecognized disassembler option with '=': %s"),
+ option);
+ return;
+ }
+
+ *equal = '\0';
+ value = equal + 1;
+ if (strcmp (option, "priv-spec") == 0)
+ {
+ enum riscv_priv_spec_class priv_spec = PRIV_SPEC_CLASS_NONE;
+ if (!riscv_get_priv_spec_class (value, &priv_spec))
+ opcodes_error_handler (_("unknown privilege spec set by %s=%s"),
+ option, value);
+ else if (default_priv_spec == PRIV_SPEC_CLASS_NONE)
+ default_priv_spec = priv_spec;
+ else if (default_priv_spec != priv_spec)
+ opcodes_error_handler (_("mis-matched privilege spec set by %s=%s, "
+ "the elf privilege attribute is %s"),
+ option, value,
+ riscv_get_priv_spec_name (default_priv_spec));
+ }
else
{
/* xgettext:c-format */
case 'E':
{
- const char* csr_name = NULL;
+ static const char *riscv_csr_hash[4096]; /* Total 2^12 CSR. */
+ static bfd_boolean init_csr = FALSE;
unsigned int csr = EXTRACT_OPERAND (CSR, l);
- switch (csr)
+
+ if (!init_csr)
{
-#define DECLARE_CSR(name, num) case num: csr_name = #name; break;
+ unsigned int i;
+ for (i = 0; i < 4096; i++)
+ riscv_csr_hash[i] = NULL;
+
+ /* Set to the newest privilege version. */
+ if (default_priv_spec == PRIV_SPEC_CLASS_NONE)
+ default_priv_spec = PRIV_SPEC_CLASS_DRAFT - 1;
+
+#define DECLARE_CSR(name, num, class, define_version, abort_version) \
+ if (riscv_csr_hash[num] == NULL \
+ && ((define_version == PRIV_SPEC_CLASS_NONE \
+ && abort_version == PRIV_SPEC_CLASS_NONE) \
+ || (default_priv_spec >= define_version \
+ && default_priv_spec < abort_version))) \
+ riscv_csr_hash[num] = #name;
+#define DECLARE_CSR_ALIAS(name, num, class, define_version, abort_version) \
+ DECLARE_CSR (name, num, class, define_version, abort_version)
#include "opcode/riscv-opc.h"
#undef DECLARE_CSR
}
- if (csr_name)
- print (info->stream, "%s", csr_name);
+
+ if (riscv_csr_hash[csr] != NULL)
+ print (info->stream, "%s", riscv_csr_hash[csr]);
else
print (info->stream, "0x%x", csr);
break;
insnlen = riscv_insn_length (word);
+ /* RISC-V instructions are always little-endian. */
+ info->endian_code = BFD_ENDIAN_LITTLE;
+
info->bytes_per_chunk = insnlen % 4 == 0 ? 4 : 2;
info->bytes_per_line = 8;
- info->display_endian = info->endian;
+ /* We don't support constant pools, so this must be code. */
+ info->display_endian = info->endian_code;
info->insn_info_valid = 1;
info->branch_delay_insns = 0;
info->data_size = 0;
op = riscv_hash[OP_HASH_IDX (word)];
if (op != NULL)
{
- int xlen = 0;
+ unsigned xlen = 0;
/* If XLEN is not known, get its value from the ELF class. */
if (info->mach == bfd_mach_riscv64)
if (no_aliases && (op->pinfo & INSN_ALIAS))
continue;
/* Is this instruction restricted to a certain value of XLEN? */
- if (isdigit (op->subset[0]) && atoi (op->subset) != xlen)
+ if ((op->xlen_requirement != 0) && (op->xlen_requirement != xlen))
continue;
/* It's a match. */
return riscv_disassemble_insn (memaddr, insn, info);
}
+disassembler_ftype
+riscv_get_disassembler (bfd *abfd)
+{
+ /* If -Mpriv-spec= isn't set, then try to set it by checking the elf
+ privileged attributes. */
+ if (abfd)
+ {
+ const char *sec_name = get_elf_backend_data (abfd)->obj_attrs_section;
+ if (bfd_get_section_by_name (abfd, sec_name) != NULL)
+ {
+ obj_attribute *attr = elf_known_obj_attributes_proc (abfd);
+ unsigned int Tag_a = Tag_RISCV_priv_spec;
+ unsigned int Tag_b = Tag_RISCV_priv_spec_minor;
+ unsigned int Tag_c = Tag_RISCV_priv_spec_revision;
+ riscv_get_priv_spec_class_from_numbers (attr[Tag_a].i,
+ attr[Tag_b].i,
+ attr[Tag_c].i,
+ &default_priv_spec);
+ }
+ }
+ return print_insn_riscv;
+}
+
+/* Prevent use of the fake labels that are generated as part of the DWARF
+ and for relaxable relocations in the assembler. */
+
+bfd_boolean
+riscv_symbol_is_valid (asymbol * sym,
+ struct disassemble_info * info ATTRIBUTE_UNUSED)
+{
+ const char * name;
+
+ if (sym == NULL)
+ return FALSE;
+
+ name = bfd_asymbol_name (sym);
+
+ return (strcmp (name, RISCV_FAKE_LABEL_NAME) != 0);
+}
+
void
print_riscv_disassembler_options (FILE *stream)
{
with the -M switch (multiple options should be separated by commas):\n"));
fprintf (stream, _("\n\
- numeric Print numeric register names, rather than ABI names.\n"));
+ numeric Print numeric register names, rather than ABI names.\n"));
+
+ fprintf (stream, _("\n\
+ no-aliases Disassemble only into canonical instructions, rather\n\
+ than into pseudoinstructions.\n"));
fprintf (stream, _("\n\
- no-aliases Disassemble only into canonical instructions, rather\n\
- than into pseudoinstructions.\n"));
+ priv-spec=PRIV Print the CSR according to the chosen privilege spec\n\
+ (1.9, 1.9.1, 1.10, 1.11).\n"));
fprintf (stream, _("\n"));
}
projects / thirdparty / binutils-gdb.git / blobdiff