* grub-core/lib/reed_solomon.c (init_powx): Set gf_powx_inv[0] just to
be deterministic. (syndroms): Compute 0 syndrom. (rs_recover): Use 0 syndrom.
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2 changed files with 12 additions and 3 deletions
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@ -1,3 +1,10 @@
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2011-12-14 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/lib/reed_solomon.c (init_powx): Set gf_powx_inv[0] just to
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be deterministic.
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(syndroms): Compute 0 syndrom.
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(rs_recover): Use 0 syndrom.
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2011-12-14 Vladimir Serbinenko <phcoder@gmail.com>
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* include/grub/kernel.h (FOR_MODULES): Make it a bit faster.
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@ -89,6 +89,7 @@ init_powx (void)
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int i;
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grub_uint8_t cur = 1;
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gf_powx_inv[0] = 0;
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for (i = 0; i < 255; i++)
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{
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gf_powx[i] = cur;
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@ -165,7 +166,8 @@ syndroms (gf_single_t *m, grub_size_t s, grub_size_t rs,
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{
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gf_single_t xn = 1;
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unsigned i;
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for (i = 0; i < rs; i++)
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sy[0] = pol_evaluate (m, s + rs - 1, xn);
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for (i = 1; i < rs; i++)
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{
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if (xn & (1 << (GF_SIZE - 1)))
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{
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@ -344,7 +346,7 @@ rs_recover (gf_single_t *m, grub_size_t s, grub_size_t rs)
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#endif
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for (j = 0; j < errnum; j++)
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eq[j] = errpot[j];
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eq[j] = 1;
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eq[errnum] = sy[0];
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for (i = 1; i < (int) rs; i++)
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{
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@ -530,7 +532,7 @@ main (int argc, char **argv)
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out = fopen ("tst_rs.bin", "wb");
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fwrite (buf, 1, s + rs, out);
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fclose (out);
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#if 0
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#if 1
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grub_memset (buf + 512 * 15, 0, 512);
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#endif
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