aes-s390x.pl: fix crash in AES_set_decrypt_key in linux32-s390x build [from HEAD].

diff --git a/crypto/aes/asm/aes-s390x.pl b/crypto/aes/asm/aes-s390x.pl
index 394ab487ad5cb3683c7ec35f8e1e3b1b32f73c7b..445a1e67620e2b962261a3b68ae03e342298f2ca 100644 (file)
--- a/crypto/aes/asm/aes-s390x.pl
+++ b/crypto/aes/asm/aes-s390x.pl
@@ -837,7 +837,8 @@ $code.=<<___ if (!$softonly);
        je      1f
        lg      %r1,24($inp)
        stg     %r1,24($key)
-1:     st      $bits,236($key) # save bits
+1:     st      $bits,236($key) # save bits [for debugging purposes]
+       lgr     $t0,%r5
        st      %r5,240($key)   # save km code
        lghi    %r2,0
        br      %r14
@@ -845,7 +846,7 @@ ___
 $code.=<<___;
 .align 16
 .Lekey_internal:
-       stm${g} %r6,%r13,6*$SIZE_T($sp) # all non-volatile regs
+       stm${g} %r4,%r13,4*$SIZE_T($sp) # all non-volatile regs and $key
 
        larl    $tbl,AES_Te+2048
 
@@ -905,8 +906,9 @@ $code.=<<___;
        la      $key,16($key)           # key+=4
        la      $t3,4($t3)              # i++
        brct    $rounds,.L128_loop
+       lghi    $t0,10
        lghi    %r2,0
-       lm${g}  %r6,%r13,6*$SIZE_T($sp)
+       lm${g}  %r4,%r13,4*$SIZE_T($sp)
        br      $ra
 
 .align 16
@@ -953,8 +955,9 @@ $code.=<<___;
        st      $s2,32($key)
        st      $s3,36($key)
        brct    $rounds,.L192_continue
+       lghi    $t0,12
        lghi    %r2,0
-       lm${g}  %r6,%r13,6*$SIZE_T($sp)
+       lm${g}  %r4,%r13,4*$SIZE_T($sp)
        br      $ra
 
 .align 16
@@ -1015,8 +1018,9 @@ $code.=<<___;
        st      $s2,40($key)
        st      $s3,44($key)
        brct    $rounds,.L256_continue
+       lghi    $t0,14
        lghi    %r2,0
-       lm${g}  %r6,%r13,6*$SIZE_T($sp)
+       lm${g}  %r4,%r13,4*$SIZE_T($sp)
        br      $ra
 
 .align 16
@@ -1067,34 +1071,26 @@ $code.=<<___;
 .type  private_AES_set_decrypt_key,\@function
 .align 16
 private_AES_set_decrypt_key:
-       st${g}  $key,4*$SIZE_T($sp)     # I rely on AES_set_encrypt_key to
-       st${g}  $ra,14*$SIZE_T($sp)     # save non-volatile registers!
+       #st${g} $key,4*$SIZE_T($sp)     # I rely on AES_set_encrypt_key to
+       st${g}  $ra,14*$SIZE_T($sp)     # save non-volatile registers and $key!
        bras    $ra,_s390x_AES_set_encrypt_key
-       l${g}   $key,4*$SIZE_T($sp)
+       #l${g}  $key,4*$SIZE_T($sp)
        l${g}   $ra,14*$SIZE_T($sp)
        ltgr    %r2,%r2
        bnzr    $ra
 ___
 $code.=<<___ if (!$softonly);
-       l       $t0,240($key)
+       #l      $t0,240($key)
        lhi     $t1,16
        cr      $t0,$t1
        jl      .Lgo
        oill    $t0,0x80        # set "decrypt" bit
        st      $t0,240($key)
        br      $ra
-
-.align 16
-.Ldkey_internal:
-       st${g}  $key,4*$SIZE_T($sp)
-       st${g}  $ra,14*$SIZE_T($sp)
-       bras    $ra,.Lekey_internal
-       l${g}   $key,4*$SIZE_T($sp)
-       l${g}   $ra,14*$SIZE_T($sp)
 ___
 $code.=<<___;
-
-.Lgo:  llgf    $rounds,240($key)
+.align 16
+.Lgo:  lgr     $rounds,$t0     #llgf   $rounds,240($key)
        la      $i1,0($key)
        sllg    $i2,$rounds,4
        la      $i2,0($i2,$key)