/* RISC-V-specific support for ELF.
- Copyright (C) 2011-2018 Free Software Foundation, Inc.
+ Copyright (C) 2011-2020 Free Software Foundation, Inc.
Contributed by Andrew Waterman (andrew@sifive.com).
Based on TILE-Gx and MIPS targets.
#include "opcode/riscv.h"
#include "libiberty.h"
#include "elfxx-riscv.h"
-#include <stdint.h>
+#include "safe-ctype.h"
#define MINUS_ONE ((bfd_vma)0 - 1)
}
reloc_howto_type *
-riscv_elf_rtype_to_howto (unsigned int r_type)
+riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type)
{
if (r_type >= ARRAY_SIZE (howto_table))
{
- (*_bfd_error_handler) (_("unrecognized relocation (0x%x)"), r_type);
+ (*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"),
+ abfd, r_type);
bfd_set_error (bfd_error_bad_value);
return NULL;
}
return bfd_reloc_ok;
}
+
+/* Parsing subset version.
+
+ Return Value:
+ Points to the end of version
+
+ Arguments:
+ `rps`: Hooks and status for parsing subset.
+ `march`: Full arch string.
+ `p`: Curent parsing position.
+ `major_version`: Parsing result of major version, using
+ default_major_version if version is not present in arch string.
+ `minor_version`: Parsing result of minor version, set to 0 if version is
+ not present in arch string, but set to `default_minor_version` if
+ `major_version` using default_major_version.
+ `default_major_version`: Default major version.
+ `default_minor_version`: Default minor version.
+ `std_ext_p`: True if parsing std extension. */
+
+static const char *
+riscv_parsing_subset_version (riscv_parse_subset_t *rps,
+ const char *march,
+ const char *p,
+ unsigned *major_version,
+ unsigned *minor_version,
+ unsigned default_major_version,
+ unsigned default_minor_version,
+ bfd_boolean std_ext_p)
+{
+ bfd_boolean major_p = TRUE;
+ unsigned version = 0;
+ unsigned major = 0;
+ unsigned minor = 0;
+ char np;
+
+ for (;*p; ++p)
+ {
+ if (*p == 'p')
+ {
+ np = *(p + 1);
+
+ if (!ISDIGIT (np))
+ {
+ /* Might be beginning of `p` extension. */
+ if (std_ext_p)
+ {
+ *major_version = version;
+ *minor_version = 0;
+ return p;
+ }
+ else
+ {
+ rps->error_handler ("-march=%s: Expect number after `%dp'.",
+ march, version);
+ return NULL;
+ }
+ }
+
+ major = version;
+ major_p = FALSE;
+ version = 0;
+ }
+ else if (ISDIGIT (*p))
+ version = (version * 10) + (*p - '0');
+ else
+ break;
+ }
+
+ if (major_p)
+ major = version;
+ else
+ minor = version;
+
+ if (major == 0 && minor == 0)
+ {
+ /* We don't found any version string, use default version. */
+ *major_version = default_major_version;
+ *minor_version = default_minor_version;
+ }
+ else
+ {
+ *major_version = major;
+ *minor_version = minor;
+ }
+ return p;
+}
+
+/* Return string which contain all supported standard extensions in
+ canonical order. */
+
+const char *
+riscv_supported_std_ext (void)
+{
+ return "mafdqlcbjtpvn";
+}
+
+/* Parsing function for standard extensions.
+
+ Return Value:
+ Points to the end of extensions.
+
+ Arguments:
+ `rps`: Hooks and status for parsing subset.
+ `march`: Full arch string.
+ `p`: Curent parsing position. */
+
+static const char *
+riscv_parse_std_ext (riscv_parse_subset_t *rps,
+ const char *march, const char *p)
+{
+ const char *all_std_exts = riscv_supported_std_ext ();
+ const char *std_exts = all_std_exts;
+
+ unsigned major_version = 0;
+ unsigned minor_version = 0;
+ char std_ext = '\0';
+
+ /* First letter must start with i, e or g. */
+ switch (*p)
+ {
+ case 'i':
+ p++;
+ p = riscv_parsing_subset_version (
+ rps,
+ march,
+ p, &major_version, &minor_version,
+ /* default_major_version= */ 2,
+ /* default_minor_version= */ 0,
+ /* std_ext_p= */TRUE);
+ riscv_add_subset (rps->subset_list, "i", major_version, minor_version);
+ break;
+
+ case 'e':
+ p++;
+ p = riscv_parsing_subset_version (
+ rps,
+ march,
+ p, &major_version, &minor_version,
+ /* default_major_version= */ 1,
+ /* default_minor_version= */ 9,
+ /* std_ext_p= */TRUE);
+
+ riscv_add_subset (rps->subset_list, "e", major_version, minor_version);
+ riscv_add_subset (rps->subset_list, "i", 2, 0);
+
+ if (*rps->xlen > 32)
+ {
+ rps->error_handler ("-march=%s: rv%de is not a valid base ISA",
+ march, *rps->xlen);
+ return NULL;
+ }
+
+ break;
+
+ case 'g':
+ p++;
+ p = riscv_parsing_subset_version (
+ rps,
+ march,
+ p, &major_version, &minor_version,
+ /* default_major_version= */ 2,
+ /* default_minor_version= */ 0,
+ /* std_ext_p= */TRUE);
+ riscv_add_subset (rps->subset_list, "i", major_version, minor_version);
+
+ for ( ; *std_exts != 'q'; std_exts++)
+ {
+ const char subset[] = {*std_exts, '\0'};
+ riscv_add_subset (
+ rps->subset_list, subset, major_version, minor_version);
+ }
+ break;
+
+ default:
+ rps->error_handler (
+ "-march=%s: first ISA subset must be `e', `i' or `g'", march);
+ return NULL;
+ }
+
+ while (*p)
+ {
+ char subset[2] = {0, 0};
+
+ if (*p == 'x' || *p == 's' || *p == 'z')
+ break;
+
+ if (*p == '_')
+ {
+ p++;
+ continue;
+ }
+
+ std_ext = *p;
+
+ /* Checking canonical order. */
+ while (*std_exts && std_ext != *std_exts) std_exts++;
+
+ if (std_ext != *std_exts)
+ {
+ if (strchr (all_std_exts, std_ext) == NULL)
+ rps->error_handler (
+ "-march=%s: unsupported ISA subset `%c'", march, *p);
+ else
+ rps->error_handler (
+ "-march=%s: ISA string is not in canonical order. `%c'",
+ march, *p);
+ return NULL;
+ }
+
+ std_exts++;
+
+ p++;
+ p = riscv_parsing_subset_version (
+ rps,
+ march,
+ p, &major_version, &minor_version,
+ /* default_major_version= */ 2,
+ /* default_minor_version= */ 0,
+ /* std_ext_p= */TRUE);
+
+ subset[0] = std_ext;
+
+ riscv_add_subset (rps->subset_list, subset, major_version, minor_version);
+ }
+ return p;
+}
+
+/* Classify the argument 'arch' into one of riscv_isa_ext_class_t. */
+
+riscv_isa_ext_class_t
+riscv_get_prefix_class (const char *arch)
+{
+ switch (*arch)
+ {
+ case 's': return RV_ISA_CLASS_S;
+ case 'x': return RV_ISA_CLASS_X;
+ case 'z': return RV_ISA_CLASS_Z;
+ default: return RV_ISA_CLASS_UNKNOWN;
+ }
+}
+
+/* Structure describing parameters to use when parsing a particular
+ riscv_isa_ext_class_t. One of these should be provided for each
+ possible class, except RV_ISA_CLASS_UNKNOWN. */
+
+typedef struct riscv_parse_config
+{
+ /* Class of the extension. */
+ riscv_isa_ext_class_t class;
+
+ /* Lower-case prefix string for error printing
+ and internal parser usage, e.g. "z", "x". */
+ const char *prefix;
+
+ /* Predicate which is used for checking whether
+ this is a "known" extension. For 'x',
+ it always returns true (since they are by
+ definition non-standard and cannot be known. */
+ bfd_boolean (*ext_valid_p) (const char *);
+} riscv_parse_config_t;
+
+/* Parse a generic prefixed extension.
+ march: The full architecture string as passed in by "-march=...".
+ p: Point from which to start parsing the -march string.
+ config: What class of extensions to parse, predicate funcs,
+ and strings to use in error reporting. */
+
+static const char *
+riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
+ const char *march,
+ const char *p,
+ const riscv_parse_config_t *config)
+{
+ unsigned major_version = 0;
+ unsigned minor_version = 0;
+ const char *last_name;
+ riscv_isa_ext_class_t class;
+
+ while (*p)
+ {
+ if (*p == '_')
+ {
+ p++;
+ continue;
+ }
+
+ /* Assert that the current extension specifier matches our parsing
+ class. */
+ class = riscv_get_prefix_class (p);
+ if (class != config->class)
+ break;
+
+ char *subset = xstrdup (p);
+ char *q = subset;
+ const char *end_of_version;
+
+ while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
+ ;
+
+ end_of_version =
+ riscv_parsing_subset_version (
+ rps,
+ march,
+ q, &major_version, &minor_version,
+ /* default_major_version= */ 2,
+ /* default_minor_version= */ 0,
+ /* std_ext_p= */FALSE);
+
+ *q = '\0';
+
+ /* Check that the name is valid.
+ For 'x', anything goes but it cannot simply be 'x'.
+ For 's', it must be known from a list and cannot simply be 's'.
+ For 'z', it must be known from a list and cannot simply be 'z'. */
+
+ /* Check that the extension name is well-formed. */
+ if (!config->ext_valid_p (subset))
+ {
+ rps->error_handler
+ ("-march=%s: Invalid or unknown %s ISA extension: '%s'",
+ march, config->prefix, subset);
+ free (subset);
+ return NULL;
+ }
+
+ /* Check that the last item is not the same as this. */
+ last_name = rps->subset_list->tail->name;
+
+ if (!strcasecmp (last_name, subset))
+ {
+ rps->error_handler ("-march=%s: Duplicate %s ISA extension: \'%s\'",
+ march, config->prefix, subset);
+ free (subset);
+ return NULL;
+ }
+
+ /* Check that we are in alphabetical order within the subset. */
+ if (!strncasecmp (last_name, config->prefix, 1)
+ && strcasecmp (last_name, subset) > 0)
+ {
+ rps->error_handler ("-march=%s: %s ISA extension not in alphabetical "
+ "order: \'%s\' must come before \'%s\'.",
+ march, config->prefix, subset, last_name);
+ free (subset);
+ return NULL;
+ }
+
+ riscv_add_subset (rps->subset_list, subset, major_version, minor_version);
+ free (subset);
+ p += end_of_version - subset;
+
+ if (*p != '\0' && *p != '_')
+ {
+ rps->error_handler ("-march=%s: %s must separate with _",
+ march, config->prefix);
+ return NULL;
+ }
+ }
+
+ return p;
+}
+
+/* List of Z-class extensions that binutils should know about.
+ Whether or not a particular entry is in this list will
+ dictate if gas/ld will accept its presence in the -march
+ string.
+
+ Example: To add an extension called "Zbb" (bitmanip base extension),
+ add "zbb" string to the list (all lowercase).
+
+ Keep this list alphabetically ordered. */
+
+static const char * const riscv_std_z_ext_strtab[] =
+ {
+ NULL
+ };
+
+/* Same as `riscv_std_z_ext_strtab', but for S-class extensions. */
+
+static const char * const riscv_std_s_ext_strtab[] =
+ {
+ NULL
+ };
+
+/* For the extension EXT, search through the list of known extensions
+ KNOWN_EXTS for a match, and return TRUE if found. */
+
+static bfd_boolean
+riscv_multi_letter_ext_valid_p (const char *ext,
+ const char *const *known_exts)
+{
+ size_t i;
+
+ for (i = 0; known_exts[i]; ++i)
+ if (!strcmp (ext, known_exts[i]))
+ return TRUE;
+
+ return FALSE;
+}
+
+/* Predicator function for x-prefixed extensions.
+ Anything goes, except the literal 'x'. */
+
+static bfd_boolean
+riscv_ext_x_valid_p (const char *arg)
+{
+ if (!strcasecmp (arg, "x"))
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Predicator functions for z-prefixed extensions.
+ Only known z-extensions are permitted. */
+
+static bfd_boolean
+riscv_ext_z_valid_p (const char *arg)
+{
+ return riscv_multi_letter_ext_valid_p (arg, riscv_std_z_ext_strtab);
+}
+
+/* Predicator function for 's' prefixed extensions.
+ Must be either literal 's', or a known s-prefixed extension. */
+
+static bfd_boolean
+riscv_ext_s_valid_p (const char *arg)
+{
+ return riscv_multi_letter_ext_valid_p (arg, riscv_std_s_ext_strtab);
+}
+
+/* Parsing order that is specified by the ISA manual. */
+
+static const riscv_parse_config_t parse_config[] =
+{
+ {RV_ISA_CLASS_S, "s", riscv_ext_s_valid_p},
+ {RV_ISA_CLASS_Z, "z", riscv_ext_z_valid_p},
+ {RV_ISA_CLASS_X, "x", riscv_ext_x_valid_p},
+ {RV_ISA_CLASS_UNKNOWN, NULL, NULL}
+};
+
+/* Function for parsing arch string.
+
+ Return Value:
+ Return TRUE on success.
+
+ Arguments:
+ `rps`: Hooks and status for parsing subset.
+ `arch`: Arch string. */
+
+bfd_boolean
+riscv_parse_subset (riscv_parse_subset_t *rps,
+ const char *arch)
+{
+ const char *p = arch;
+ size_t i;
+
+ if (strncmp (p, "rv32", 4) == 0)
+ {
+ *rps->xlen = 32;
+ p += 4;
+ }
+ else if (strncmp (p, "rv64", 4) == 0)
+ {
+ *rps->xlen = 64;
+ p += 4;
+ }
+ else
+ {
+ rps->error_handler ("-march=%s: ISA string must begin with rv32 or rv64",
+ arch);
+ return FALSE;
+ }
+
+ /* Parsing standard extension. */
+ p = riscv_parse_std_ext (rps, arch, p);
+
+ if (p == NULL)
+ return FALSE;
+
+ /* Parse the different classes of extensions in the specified order. */
+
+ for (i = 0; i < ARRAY_SIZE (parse_config); ++i) {
+ p = riscv_parse_prefixed_ext (rps, arch, p, &parse_config[i]);
+
+ if (p == NULL)
+ return FALSE;
+ }
+
+ if (*p != '\0')
+ {
+ rps->error_handler ("-march=%s: unexpected ISA string at end: %s",
+ arch, p);
+ return FALSE;
+ }
+
+ if (riscv_lookup_subset (rps->subset_list, "e")
+ && riscv_lookup_subset (rps->subset_list, "f"))
+ {
+ rps->error_handler ("-march=%s: rv32e does not support the `f' extension",
+ arch);
+ return FALSE;
+ }
+
+ if (riscv_lookup_subset (rps->subset_list, "d")
+ && !riscv_lookup_subset (rps->subset_list, "f"))
+ {
+ rps->error_handler ("-march=%s: `d' extension requires `f' extension",
+ arch);
+ return FALSE;
+ }
+
+ if (riscv_lookup_subset (rps->subset_list, "q")
+ && !riscv_lookup_subset (rps->subset_list, "d"))
+ {
+ rps->error_handler ("-march=%s: `q' extension requires `d' extension",
+ arch);
+ return FALSE;
+ }
+
+ if (riscv_lookup_subset (rps->subset_list, "q") && *rps->xlen < 64)
+ {
+ rps->error_handler ("-march=%s: rv32 does not support the `q' extension",
+ arch);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Add new subset to list. */
+
+void
+riscv_add_subset (riscv_subset_list_t *subset_list,
+ const char *subset,
+ int major, int minor)
+{
+ riscv_subset_t *s = xmalloc (sizeof *s);
+
+ if (subset_list->head == NULL)
+ subset_list->head = s;
+
+ s->name = xstrdup (subset);
+ s->major_version = major;
+ s->minor_version = minor;
+ s->next = NULL;
+
+ if (subset_list->tail != NULL)
+ subset_list->tail->next = s;
+
+ subset_list->tail = s;
+}
+
+/* Find subset in list without version checking, return NULL if not found. */
+
+riscv_subset_t *
+riscv_lookup_subset (const riscv_subset_list_t *subset_list,
+ const char *subset)
+{
+ return riscv_lookup_subset_version (
+ subset_list, subset,
+ RISCV_DONT_CARE_VERSION,
+ RISCV_DONT_CARE_VERSION);
+}
+
+/* Find subset in list with version checking, return NULL if not found. */
+
+riscv_subset_t *
+riscv_lookup_subset_version (const riscv_subset_list_t *subset_list,
+ const char *subset,
+ int major, int minor)
+{
+ riscv_subset_t *s;
+
+ for (s = subset_list->head; s != NULL; s = s->next)
+ if (strcasecmp (s->name, subset) == 0)
+ {
+ if ((major != RISCV_DONT_CARE_VERSION)
+ && (s->major_version != major))
+ return NULL;
+
+ if ((minor != RISCV_DONT_CARE_VERSION)
+ && (s->minor_version != minor))
+ return NULL;
+
+ return s;
+ }
+
+ return NULL;
+}
+
+/* Release subset list. */
+
+void
+riscv_release_subset_list (riscv_subset_list_t *subset_list)
+{
+ while (subset_list->head != NULL)
+ {
+ riscv_subset_t *next = subset_list->head->next;
+ free ((void *)subset_list->head->name);
+ free (subset_list->head);
+ subset_list->head = next;
+ }
+
+ subset_list->tail = NULL;
+}
+
+/* Return the number of digits for the input. */
+
+static size_t
+riscv_estimate_digit (unsigned num)
+{
+ size_t digit = 0;
+ if (num == 0)
+ return 1;
+
+ for (digit = 0; num ; num /= 10)
+ digit++;
+
+ return digit;
+}
+
+/* Auxiliary function to estimate string length of subset list. */
+
+static size_t
+riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
+{
+ if (subset == NULL)
+ return 6; /* For rv32/rv64/rv128 and string terminator. */
+
+ return riscv_estimate_arch_strlen1 (subset->next)
+ + strlen (subset->name)
+ + riscv_estimate_digit (subset->major_version)
+ + 1 /* For version seperator: 'p'. */
+ + riscv_estimate_digit (subset->minor_version)
+ + 1 /* For underscore. */;
+}
+
+/* Estimate the string length of this subset list. */
+
+static size_t
+riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
+{
+ return riscv_estimate_arch_strlen1 (subset_list->head);
+}
+
+/* Auxiliary function to convert subset info to string. */
+
+static void
+riscv_arch_str1 (riscv_subset_t *subset,
+ char *attr_str, char *buf, size_t bufsz)
+{
+ const char *underline = "_";
+
+ if (subset == NULL)
+ return;
+
+ /* No underline between rvXX and i/e. */
+ if ((strcasecmp (subset->name, "i") == 0)
+ || (strcasecmp (subset->name, "e") == 0))
+ underline = "";
+
+ snprintf (buf, bufsz, "%s%s%dp%d",
+ underline,
+ subset->name,
+ subset->major_version,
+ subset->minor_version);
+
+ strncat (attr_str, buf, bufsz);
+
+ /* Skip 'i' extension after 'e'. */
+ if ((strcasecmp (subset->name, "e") == 0)
+ && subset->next
+ && (strcasecmp (subset->next->name, "i") == 0))
+ riscv_arch_str1 (subset->next->next, attr_str, buf, bufsz);
+ else
+ riscv_arch_str1 (subset->next, attr_str, buf, bufsz);
+}
+
+/* Convert subset info to string with explicit version info. */
+
+char *
+riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
+{
+ size_t arch_str_len = riscv_estimate_arch_strlen (subset);
+ char *attr_str = xmalloc (arch_str_len);
+ char *buf = xmalloc (arch_str_len);
+
+ snprintf (attr_str, arch_str_len, "rv%u", xlen);
+
+ riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
+ free (buf);
+
+ return attr_str;
+}
projects / deliverable / binutils-gdb.git / blobdiff