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-rw-r--r--opcodes/bpf-asm.c590
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diff --git a/opcodes/bpf-asm.c b/opcodes/bpf-asm.c
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--- a/opcodes/bpf-asm.c
+++ /dev/null
@@ -1,590 +0,0 @@
-/* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
-/* Assembler interface for targets using CGEN. -*- C -*-
- CGEN: Cpu tools GENerator
-
- THIS FILE IS MACHINE GENERATED WITH CGEN.
- - the resultant file is machine generated, cgen-asm.in isn't
-
- Copyright (C) 1996-2023 Free Software Foundation, Inc.
-
- This file is part of libopcodes.
-
- This library is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
-
- It is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
-
-
-/* ??? Eventually more and more of this stuff can go to cpu-independent files.
- Keep that in mind. */
-
-#include "sysdep.h"
-#include <stdio.h>
-#include "ansidecl.h"
-#include "bfd.h"
-#include "symcat.h"
-#include "bpf-desc.h"
-#include "bpf-opc.h"
-#include "opintl.h"
-#include "xregex.h"
-#include "libiberty.h"
-#include "safe-ctype.h"
-
-#undef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
-#undef max
-#define max(a,b) ((a) > (b) ? (a) : (b))
-
-static const char * parse_insn_normal
- (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
-
-/* -- assembler routines inserted here. */
-
-/* -- asm.c */
-
-/* Parse a signed 64-bit immediate. */
-
-static const char *
-parse_imm64 (CGEN_CPU_DESC cd,
- const char **strp,
- int opindex,
- int64_t *valuep)
-{
- bfd_vma value;
- enum cgen_parse_operand_result result;
- const char *errmsg;
-
- errmsg = (* cd->parse_operand_fn)
- (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
- &result, &value);
- if (!errmsg)
- *valuep = value;
-
- return errmsg;
-}
-
-/* Endianness size operands are integer immediates whose values can be
- 16, 32 or 64. */
-
-static const char *
-parse_endsize (CGEN_CPU_DESC cd,
- const char **strp,
- int opindex,
- unsigned long *valuep)
-{
- const char *errmsg;
-
- errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
- if (errmsg)
- return errmsg;
-
- switch (*valuep)
- {
- case 16:
- case 32:
- case 64:
- break;
- default:
- return _("expected 16, 32 or 64 in");
- }
-
- return NULL;
-}
-
-/* Special check to ensure that the right instruction variant is used
- for the given endianness induced by the ISA selected in the CPU.
- See bpf.cpu for a discussion on how eBPF is really two instruction
- sets. */
-
-int
-bpf_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
-{
- CGEN_BITSET isas = CGEN_INSN_BITSET_ATTR_VALUE (insn, CGEN_INSN_ISA);
-
- return cgen_bitset_intersect_p (&isas, cd->isas);
-}
-
-
-/* -- dis.c */
-
-const char * bpf_cgen_parse_operand
- (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
-
-/* Main entry point for operand parsing.
-
- This function is basically just a big switch statement. Earlier versions
- used tables to look up the function to use, but
- - if the table contains both assembler and disassembler functions then
- the disassembler contains much of the assembler and vice-versa,
- - there's a lot of inlining possibilities as things grow,
- - using a switch statement avoids the function call overhead.
-
- This function could be moved into `parse_insn_normal', but keeping it
- separate makes clear the interface between `parse_insn_normal' and each of
- the handlers. */
-
-const char *
-bpf_cgen_parse_operand (CGEN_CPU_DESC cd,
- int opindex,
- const char ** strp,
- CGEN_FIELDS * fields)
-{
- const char * errmsg = NULL;
- /* Used by scalar operands that still need to be parsed. */
- long junk ATTRIBUTE_UNUSED;
-
- switch (opindex)
- {
- case BPF_OPERAND_DISP16 :
- errmsg = cgen_parse_signed_integer (cd, strp, BPF_OPERAND_DISP16, (long *) (& fields->f_offset16));
- break;
- case BPF_OPERAND_DISP32 :
- errmsg = cgen_parse_signed_integer (cd, strp, BPF_OPERAND_DISP32, (long *) (& fields->f_imm32));
- break;
- case BPF_OPERAND_DSTBE :
- errmsg = cgen_parse_keyword (cd, strp, & bpf_cgen_opval_h_gpr, & fields->f_dstbe);
- break;
- case BPF_OPERAND_DSTLE :
- errmsg = cgen_parse_keyword (cd, strp, & bpf_cgen_opval_h_gpr, & fields->f_dstle);
- break;
- case BPF_OPERAND_ENDSIZE :
- errmsg = parse_endsize (cd, strp, BPF_OPERAND_ENDSIZE, (unsigned long *) (& fields->f_imm32));
- break;
- case BPF_OPERAND_IMM32 :
- errmsg = cgen_parse_signed_integer (cd, strp, BPF_OPERAND_IMM32, (long *) (& fields->f_imm32));
- break;
- case BPF_OPERAND_IMM64 :
- errmsg = parse_imm64 (cd, strp, BPF_OPERAND_IMM64, (int64_t *) (& fields->f_imm64));
- break;
- case BPF_OPERAND_OFFSET16 :
- errmsg = cgen_parse_signed_integer (cd, strp, BPF_OPERAND_OFFSET16, (long *) (& fields->f_offset16));
- break;
- case BPF_OPERAND_SRCBE :
- errmsg = cgen_parse_keyword (cd, strp, & bpf_cgen_opval_h_gpr, & fields->f_srcbe);
- break;
- case BPF_OPERAND_SRCLE :
- errmsg = cgen_parse_keyword (cd, strp, & bpf_cgen_opval_h_gpr, & fields->f_srcle);
- break;
-
- default :
- /* xgettext:c-format */
- opcodes_error_handler
- (_("internal error: unrecognized field %d while parsing"),
- opindex);
- abort ();
- }
-
- return errmsg;
-}
-
-cgen_parse_fn * const bpf_cgen_parse_handlers[] =
-{
- parse_insn_normal,
-};
-
-void
-bpf_cgen_init_asm (CGEN_CPU_DESC cd)
-{
- bpf_cgen_init_opcode_table (cd);
- bpf_cgen_init_ibld_table (cd);
- cd->parse_handlers = & bpf_cgen_parse_handlers[0];
- cd->parse_operand = bpf_cgen_parse_operand;
-#ifdef CGEN_ASM_INIT_HOOK
-CGEN_ASM_INIT_HOOK
-#endif
-}
-
-
-
-/* Regex construction routine.
-
- This translates an opcode syntax string into a regex string,
- by replacing any non-character syntax element (such as an
- opcode) with the pattern '.*'
-
- It then compiles the regex and stores it in the opcode, for
- later use by bpf_cgen_assemble_insn
-
- Returns NULL for success, an error message for failure. */
-
-char *
-bpf_cgen_build_insn_regex (CGEN_INSN *insn)
-{
- CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
- const char *mnem = CGEN_INSN_MNEMONIC (insn);
- char rxbuf[CGEN_MAX_RX_ELEMENTS];
- char *rx = rxbuf;
- const CGEN_SYNTAX_CHAR_TYPE *syn;
- int reg_err;
-
- syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
-
- /* Mnemonics come first in the syntax string. */
- if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
- return _("missing mnemonic in syntax string");
- ++syn;
-
- /* Generate a case sensitive regular expression that emulates case
- insensitive matching in the "C" locale. We cannot generate a case
- insensitive regular expression because in Turkish locales, 'i' and 'I'
- are not equal modulo case conversion. */
-
- /* Copy the literal mnemonic out of the insn. */
- for (; *mnem; mnem++)
- {
- char c = *mnem;
-
- if (ISALPHA (c))
- {
- *rx++ = '[';
- *rx++ = TOLOWER (c);
- *rx++ = TOUPPER (c);
- *rx++ = ']';
- }
- else
- *rx++ = c;
- }
-
- /* Copy any remaining literals from the syntax string into the rx. */
- for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
- {
- if (CGEN_SYNTAX_CHAR_P (* syn))
- {
- char c = CGEN_SYNTAX_CHAR (* syn);
-
- switch (c)
- {
- /* Escape any regex metacharacters in the syntax. */
- case '.': case '[': case '\\':
- case '*': case '^': case '$':
-
-#ifdef CGEN_ESCAPE_EXTENDED_REGEX
- case '?': case '{': case '}':
- case '(': case ')': case '*':
- case '|': case '+': case ']':
-#endif
- *rx++ = '\\';
- *rx++ = c;
- break;
-
- default:
- if (ISALPHA (c))
- {
- *rx++ = '[';
- *rx++ = TOLOWER (c);
- *rx++ = TOUPPER (c);
- *rx++ = ']';
- }
- else
- *rx++ = c;
- break;
- }
- }
- else
- {
- /* Replace non-syntax fields with globs. */
- *rx++ = '.';
- *rx++ = '*';
- }
- }
-
- /* Trailing whitespace ok. */
- * rx++ = '[';
- * rx++ = ' ';
- * rx++ = '\t';
- * rx++ = ']';
- * rx++ = '*';
-
- /* But anchor it after that. */
- * rx++ = '$';
- * rx = '\0';
-
- CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
- reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
-
- if (reg_err == 0)
- return NULL;
- else
- {
- static char msg[80];
-
- regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
- regfree ((regex_t *) CGEN_INSN_RX (insn));
- free (CGEN_INSN_RX (insn));
- (CGEN_INSN_RX (insn)) = NULL;
- return msg;
- }
-}
-
-
-/* Default insn parser.
-
- The syntax string is scanned and operands are parsed and stored in FIELDS.
- Relocs are queued as we go via other callbacks.
-
- ??? Note that this is currently an all-or-nothing parser. If we fail to
- parse the instruction, we return 0 and the caller will start over from
- the beginning. Backtracking will be necessary in parsing subexpressions,
- but that can be handled there. Not handling backtracking here may get
- expensive in the case of the m68k. Deal with later.
-
- Returns NULL for success, an error message for failure. */
-
-static const char *
-parse_insn_normal (CGEN_CPU_DESC cd,
- const CGEN_INSN *insn,
- const char **strp,
- CGEN_FIELDS *fields)
-{
- /* ??? Runtime added insns not handled yet. */
- const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
- const char *str = *strp;
- const char *errmsg;
- const char *p;
- const CGEN_SYNTAX_CHAR_TYPE * syn;
-#ifdef CGEN_MNEMONIC_OPERANDS
- /* FIXME: wip */
- int past_opcode_p;
-#endif
-
- /* For now we assume the mnemonic is first (there are no leading operands).
- We can parse it without needing to set up operand parsing.
- GAS's input scrubber will ensure mnemonics are lowercase, but we may
- not be called from GAS. */
- p = CGEN_INSN_MNEMONIC (insn);
- while (*p && TOLOWER (*p) == TOLOWER (*str))
- ++p, ++str;
-
- if (* p)
- return _("unrecognized instruction");
-
-#ifndef CGEN_MNEMONIC_OPERANDS
- if (* str && ! ISSPACE (* str))
- return _("unrecognized instruction");
-#endif
-
- CGEN_INIT_PARSE (cd);
- cgen_init_parse_operand (cd);
-#ifdef CGEN_MNEMONIC_OPERANDS
- past_opcode_p = 0;
-#endif
-
- /* We don't check for (*str != '\0') here because we want to parse
- any trailing fake arguments in the syntax string. */
- syn = CGEN_SYNTAX_STRING (syntax);
-
- /* Mnemonics come first for now, ensure valid string. */
- if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
- abort ();
-
- ++syn;
-
- while (* syn != 0)
- {
- /* Non operand chars must match exactly. */
- if (CGEN_SYNTAX_CHAR_P (* syn))
- {
- /* FIXME: While we allow for non-GAS callers above, we assume the
- first char after the mnemonic part is a space. */
- /* FIXME: We also take inappropriate advantage of the fact that
- GAS's input scrubber will remove extraneous blanks. */
- if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
- {
-#ifdef CGEN_MNEMONIC_OPERANDS
- if (CGEN_SYNTAX_CHAR(* syn) == ' ')
- past_opcode_p = 1;
-#endif
- ++ syn;
- ++ str;
- }
- else if (*str)
- {
- /* Syntax char didn't match. Can't be this insn. */
- static char msg [80];
-
- /* xgettext:c-format */
- sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
- CGEN_SYNTAX_CHAR(*syn), *str);
- return msg;
- }
- else
- {
- /* Ran out of input. */
- static char msg [80];
-
- /* xgettext:c-format */
- sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
- CGEN_SYNTAX_CHAR(*syn));
- return msg;
- }
- continue;
- }
-
-#ifdef CGEN_MNEMONIC_OPERANDS
- (void) past_opcode_p;
-#endif
- /* We have an operand of some sort. */
- errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
- if (errmsg)
- return errmsg;
-
- /* Done with this operand, continue with next one. */
- ++ syn;
- }
-
- /* If we're at the end of the syntax string, we're done. */
- if (* syn == 0)
- {
- /* FIXME: For the moment we assume a valid `str' can only contain
- blanks now. IE: We needn't try again with a longer version of
- the insn and it is assumed that longer versions of insns appear
- before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
- while (ISSPACE (* str))
- ++ str;
-
- if (* str != '\0')
- return _("junk at end of line"); /* FIXME: would like to include `str' */
-
- return NULL;
- }
-
- /* We couldn't parse it. */
- return _("unrecognized instruction");
-}
-
-/* Main entry point.
- This routine is called for each instruction to be assembled.
- STR points to the insn to be assembled.
- We assume all necessary tables have been initialized.
- The assembled instruction, less any fixups, is stored in BUF.
- Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
- still needs to be converted to target byte order, otherwise BUF is an array
- of bytes in target byte order.
- The result is a pointer to the insn's entry in the opcode table,
- or NULL if an error occured (an error message will have already been
- printed).
-
- Note that when processing (non-alias) macro-insns,
- this function recurses.
-
- ??? It's possible to make this cpu-independent.
- One would have to deal with a few minor things.
- At this point in time doing so would be more of a curiosity than useful
- [for example this file isn't _that_ big], but keeping the possibility in
- mind helps keep the design clean. */
-
-const CGEN_INSN *
-bpf_cgen_assemble_insn (CGEN_CPU_DESC cd,
- const char *str,
- CGEN_FIELDS *fields,
- CGEN_INSN_BYTES_PTR buf,
- char **errmsg)
-{
- const char *start;
- CGEN_INSN_LIST *ilist;
- const char *parse_errmsg = NULL;
- const char *insert_errmsg = NULL;
- int recognized_mnemonic = 0;
-
- /* Skip leading white space. */
- while (ISSPACE (* str))
- ++ str;
-
- /* The instructions are stored in hashed lists.
- Get the first in the list. */
- ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
-
- /* Keep looking until we find a match. */
- start = str;
- for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
- {
- const CGEN_INSN *insn = ilist->insn;
- recognized_mnemonic = 1;
-
-#ifdef CGEN_VALIDATE_INSN_SUPPORTED
- /* Not usually needed as unsupported opcodes
- shouldn't be in the hash lists. */
- /* Is this insn supported by the selected cpu? */
- if (! bpf_cgen_insn_supported (cd, insn))
- continue;
-#endif
- /* If the RELAXED attribute is set, this is an insn that shouldn't be
- chosen immediately. Instead, it is used during assembler/linker
- relaxation if possible. */
- if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
- continue;
-
- str = start;
-
- /* Skip this insn if str doesn't look right lexically. */
- if (CGEN_INSN_RX (insn) != NULL &&
- regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
- continue;
-
- /* Allow parse/insert handlers to obtain length of insn. */
- CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
-
- parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
- if (parse_errmsg != NULL)
- continue;
-
- /* ??? 0 is passed for `pc'. */
- insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
- (bfd_vma) 0);
- if (insert_errmsg != NULL)
- continue;
-
- /* It is up to the caller to actually output the insn and any
- queued relocs. */
- return insn;
- }
-
- {
- static char errbuf[150];
- const char *tmp_errmsg;
-#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
-#define be_verbose 1
-#else
-#define be_verbose 0
-#endif
-
- if (be_verbose)
- {
- /* If requesting verbose error messages, use insert_errmsg.
- Failing that, use parse_errmsg. */
- tmp_errmsg = (insert_errmsg ? insert_errmsg :
- parse_errmsg ? parse_errmsg :
- recognized_mnemonic ?
- _("unrecognized form of instruction") :
- _("unrecognized instruction"));
-
- if (strlen (start) > 50)
- /* xgettext:c-format */
- sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
- else
- /* xgettext:c-format */
- sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
- }
- else
- {
- if (strlen (start) > 50)
- /* xgettext:c-format */
- sprintf (errbuf, _("bad instruction `%.50s...'"), start);
- else
- /* xgettext:c-format */
- sprintf (errbuf, _("bad instruction `%.50s'"), start);
- }
-
- *errmsg = errbuf;
- return NULL;
- }
-}
generated by cgit v1.1 at 2024-12-01 22:50:39 +0000