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fix unsafe read of Y in assembly kernel

This commit is contained in:
Caroline Newcombe 2022-03-11 11:56:33 -06:00
parent 8d5a9c2f98
commit 5cc1111383
1 changed files with 16 additions and 15 deletions
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31
kernel/x86_64/zsymv_L_sse2.S
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@ -452,11 +452,6 @@
MOVDDUP(4 * SIZE, A1, a1) MOVDDUP(4 * SIZE, A1, a1)
movsd 0 * SIZE(YY), yy1
movhpd 1 * SIZE(YY), yy1
movsd 2 * SIZE(YY), yy2
movhpd 3 * SIZE(YY), yy2
movapd 8 * SIZE(XX), xtemp1 movapd 8 * SIZE(XX), xtemp1
movapd 10 * SIZE(XX), xtemp2 movapd 10 * SIZE(XX), xtemp2
movapd 12 * SIZE(XX), xtemp3 movapd 12 * SIZE(XX), xtemp3
@ -475,6 +470,12 @@
MOVDDUP(6 * SIZE - (4 * SIZE), A2, a2) MOVDDUP(6 * SIZE - (4 * SIZE), A2, a2)
ALIGN_3 ALIGN_3
.L12_prep:
movsd 0 * SIZE(YY), yy1
movhpd 1 * SIZE(YY), yy1
movsd 2 * SIZE(YY), yy2
movhpd 3 * SIZE(YY), yy2
.L12: .L12:
movapd xtemp1, xt1 movapd xtemp1, xt1
mulpd a1, xt1 mulpd a1, xt1
@ -608,8 +609,6 @@
movlpd yy2, 6 * SIZE(YY) movlpd yy2, 6 * SIZE(YY)
movhpd yy2, 7 * SIZE(YY) movhpd yy2, 7 * SIZE(YY)
movsd 10 * SIZE(YY), yy2
movhpd 11 * SIZE(YY), yy2
movapd xtemp2, xt1 movapd xtemp2, xt1
movapd 18 * SIZE(XX), xtemp2 movapd 18 * SIZE(XX), xtemp2
@ -621,8 +620,6 @@
movlpd yy1, 4 * SIZE(YY) movlpd yy1, 4 * SIZE(YY)
movhpd yy1, 5 * SIZE(YY) movhpd yy1, 5 * SIZE(YY)
movsd 8 * SIZE(YY), yy1
movhpd 9 * SIZE(YY), yy1
subq $-16 * SIZE, XX subq $-16 * SIZE, XX
addq $ 8 * SIZE, YY addq $ 8 * SIZE, YY
@ -630,7 +627,8 @@
addq $ 8 * SIZE, A2 addq $ 8 * SIZE, A2
decq I decq I
jg .L12 jg .L12_prep
jmp .L15
ALIGN_3 ALIGN_3
.L14: .L14:
@ -641,7 +639,6 @@
jle .L16 jle .L16
MOVDDUP(6 * SIZE - (4 * SIZE), A2, a2) MOVDDUP(6 * SIZE - (4 * SIZE), A2, a2)
jmp .L15_pastcheck
.L15: .L15:
movq M, I movq M, I
@ -650,6 +647,11 @@
testq $2, I testq $2, I
jle .L16 jle .L16
movsd 0 * SIZE(YY), yy1
movhpd 1 * SIZE(YY), yy1
movsd 2 * SIZE(YY), yy2
movhpd 3 * SIZE(YY), yy2
.L15_pastcheck: .L15_pastcheck:
movapd xtemp1, xt1 movapd xtemp1, xt1
mulpd a1, xt1 mulpd a1, xt1
@ -705,8 +707,6 @@
movlpd yy2, 2 * SIZE(YY) movlpd yy2, 2 * SIZE(YY)
movhpd yy2, 3 * SIZE(YY) movhpd yy2, 3 * SIZE(YY)
movsd 6 * SIZE(YY), yy2
movhpd 7 * SIZE(YY), yy2
movapd xtemp2, xt1 movapd xtemp2, xt1
movapd 10 * SIZE(XX), xtemp2 movapd 10 * SIZE(XX), xtemp2
@ -717,8 +717,6 @@
movlpd yy1, 0 * SIZE(YY) movlpd yy1, 0 * SIZE(YY)
movhpd yy1, 1 * SIZE(YY) movhpd yy1, 1 * SIZE(YY)
movsd 4 * SIZE(YY), yy1
movhpd 5 * SIZE(YY), yy1
addq $4 * SIZE, YY addq $4 * SIZE, YY
addq $4 * SIZE, A1 addq $4 * SIZE, A1
@ -731,6 +729,9 @@
MOVDDUP(1 * SIZE, A1, a2) MOVDDUP(1 * SIZE, A1, a2)
movsd 0 * SIZE(YY), yy1
movhpd 1 * SIZE(YY), yy1
movapd xtemp1, xt1 movapd xtemp1, xt1
mulpd a1, xt1 mulpd a1, xt1
mulpd atemp1, a1 mulpd atemp1, a1