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RISC-V: Maintain a string to hold the canonical order

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Using dummy entry in riscv_supported_std_ext cause confusing and wrongly
support `b` and `k` extensions.

bfd/
	* elfxx-riscv.c (riscv_supported_std_ext): Drop unsupported
	extensions.
	(riscv_ext_canonical_order): New.
	(riscv_init_ext_order): Use riscv_ext_canonical_order rather
	than riscv_supported_std_ext to compute canonical order.

V2 Changes:

- Use `*ext` rather than `*ext != NULL` for checking is reach end of
  string.
This commit is contained in:
Kito Cheng
2022-02-21 23:14:31 +08:00
committed by Nelson Chu
parent fadefdc518
commit 3a3e333f65
1 changed files with 5 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
bfd/elfxx-riscv.c
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@ -1163,17 +1163,10 @@ static struct riscv_supported_ext riscv_supported_std_ext[] =
{"q", ISA_SPEC_CLASS_20191213, 2, 2, 0 }, {"q", ISA_SPEC_CLASS_20191213, 2, 2, 0 },
{"q", ISA_SPEC_CLASS_20190608, 2, 2, 0 }, {"q", ISA_SPEC_CLASS_20190608, 2, 2, 0 },
{"q", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"q", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
{"l", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"c", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"c", ISA_SPEC_CLASS_20191213, 2, 0, 0 },
{"c", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"c", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
{"c", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"c", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
{"b", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"k", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"j", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"t", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"p", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{"v", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"v", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"n", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 },
{NULL, 0, 0, 0, 0} {NULL, 0, 0, 0, 0}
}; };
@ -1341,6 +1334,9 @@ riscv_recognized_prefixed_ext (const char *ext)
return false; return false;
} }
/* Canonical order for single letter extensions. */
static const char riscv_ext_canonical_order[] = "eigmafdqlcbjktpvn";
/* Array is used to compare the orders of standard extensions quickly. */ /* Array is used to compare the orders of standard extensions quickly. */
static int riscv_ext_order[26] = {0}; static int riscv_ext_order[26] = {0};
@ -1356,16 +1352,8 @@ riscv_init_ext_order (void)
/* The orders of all standard extensions are positive. */ /* The orders of all standard extensions are positive. */
int order = 1; int order = 1;
int i = 0; for (const char *ext = &riscv_ext_canonical_order[0]; *ext; ++ext)
while (riscv_supported_std_ext[i].name != NULL)
{
const char *ext = riscv_supported_std_ext[i].name;
riscv_ext_order[(*ext - 'a')] = order++; riscv_ext_order[(*ext - 'a')] = order++;
i++;
while (riscv_supported_std_ext[i].name
&& strcmp (ext, riscv_supported_std_ext[i].name) == 0)
i++;
}
/* Some of the prefixed keyword are not single letter, so we set /* Some of the prefixed keyword are not single letter, so we set
their prefixed orders in the riscv_compare_subsets directly, their prefixed orders in the riscv_compare_subsets directly,