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scripts/sorttable: Unify arm64 & x86 sort functions

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The format of the arm64 and x86 exception table entries is essentially
the same as of commits:

  46d28947d9 ("x86/extable: Rework the exception table mechanics")
  d6e2cc5647 ("arm64: extable: add `type` and `data` fields")

Both use a 12-byte entry consisting of two 32-bit relative offsets and
32 bits of (absolute) data, and their sort functions are identical aside
from commentary, with arm64 saying:

   /* Don't touch the fixup type or data */

... and x86 saying:

  /* Don't touch the fixup type */

Unify the two behind a common sort_relative_table_with_data() function,
retaining the arm64 commentary.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Mark Rutland 2021-11-08 11:42:20 +00:00 committed by Palmer Dabbelt
parent fa55b7dcdc
commit e232333be6
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
1 changed files with 3 additions and 33 deletions
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36
scripts/sorttable.c
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@ -231,7 +231,7 @@ static void sort_relative_table(char *extab_image, int image_size)
}
}
static void arm64_sort_relative_table(char *extab_image, int image_size)
static void sort_relative_table_with_data(char *extab_image, int image_size)
{
int i = 0;
@ -259,34 +259,6 @@ static void arm64_sort_relative_table(char *extab_image, int image_size)
}
}
static void x86_sort_relative_table(char *extab_image, int image_size)
{
int i = 0;
while (i < image_size) {
uint32_t *loc = (uint32_t *)(extab_image + i);
w(r(loc) + i, loc);
w(r(loc + 1) + i + 4, loc + 1);
/* Don't touch the fixup type */
i += sizeof(uint32_t) * 3;
}
qsort(extab_image, image_size / 12, 12, compare_relative_table);
i = 0;
while (i < image_size) {
uint32_t *loc = (uint32_t *)(extab_image + i);
w(r(loc) - i, loc);
w(r(loc + 1) - (i + 4), loc + 1);
/* Don't touch the fixup type */
i += sizeof(uint32_t) * 3;
}
}
static void s390_sort_relative_table(char *extab_image, int image_size)
{
int i;
@ -364,15 +336,13 @@ static int do_file(char const *const fname, void *addr)
switch (r2(&ehdr->e_machine)) {
case EM_386:
case EM_AARCH64:
case EM_X86_64:
custom_sort = x86_sort_relative_table;
custom_sort = sort_relative_table_with_data;
break;
case EM_S390:
custom_sort = s390_sort_relative_table;
break;
case EM_AARCH64:
custom_sort = arm64_sort_relative_table;
break;
case EM_PARISC:
case EM_PPC:
case EM_PPC64: