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2000-12-05  Martin Schwidefsky  <schwidefsky@de.ibm.com>

        * sysdeps/unix/sysv/linux/s390/mmap64.S: Use mmap if mmap2 isn't
	available.
This commit is contained in:
Andreas Jaeger 2000-12-05 09:29:23 +00:00
parent cf3141a59d
commit e22669a312
2 changed files with 53 additions and 48 deletions
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@ -1,3 +1,8 @@
2000-12-05 Martin Schwidefsky <schwidefsky@de.ibm.com>
* sysdeps/unix/sysv/linux/s390/mmap64.S: Use mmap if mmap2 isn't
available.
2000-12-05 Andreas Jaeger <aj@suse.de> 2000-12-05 Andreas Jaeger <aj@suse.de>
* nss/test-netdb.c: Mark local functions as static to avoid * nss/test-netdb.c: Mark local functions as static to avoid

96
sysdeps/unix/sysv/linux/s390/mmap64.S
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@ -9,93 +9,93 @@
The GNU C Library is distributed in the hope that it will be useful, The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details. Library General Public License for more details.
You should have received a copy of the GNU Library General Public You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not, License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include <sysdep.h> #include <sysdep.h>
#define EINVAL 22 #define EINVAL 22
#define ENOSYS 38 #define ENOSYS 38
.text .text
ENTRY(__mmap64) ENTRY(__mmap64)
/* Save registers and setup stack frame. */ /* Save registers and setup stack frame. */
stm %r6,%r15,24(%r15) stm %r6,%r15,24(%r15)
lr %r1,%r15 lr %r1,%r15
ahi %r15,-120 /* Buy stack space. */ ahi %r15,-120 /* Buy stack space. */
st %r1,0(%r15) /* Store back chain. */ st %r1,0(%r15) /* Store back chain. */
/* Store parameters on stack, because mmap2 and old_mmap /* Store parameters on stack, because mmap2 and old_mmap
* take only one parameter: a pointer to the parameter area. */ * take only one parameter: a pointer to the parameter area. */
st %r6,0x70(%r15) /* Store 'fd'. */ st %r6,0x70(%r15) /* Store 'fd'. */
st %r5,0x6C(%r15) /* Store 'flags'. */ st %r5,0x6C(%r15) /* Store 'flags'. */
st %r4,0x68(%r15) /* Store 'prot'. */ st %r4,0x68(%r15) /* Store 'prot'. */
st %r3,0x64(%r15) /* Store 'length'. */ st %r3,0x64(%r15) /* Store 'length'. */
st %r2,0x60(%r15) /* Store 'start'. */ st %r2,0x60(%r15) /* Store 'start'. */
#ifdef __NR_mmap2 #ifdef __NR_mmap2
lm %r0,%r1,216(%r15) /* Load 64 bit offset. */ lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
tml %r1,0x0fff /* Offset page aligned ? */ tml %r1,0x0fff /* Offset page aligned ? */
jnz 2f /* No -> EINVAL. */ jnz 2f /* No -> EINVAL. */
srdl %r0,12 /* mmap2 takes the offset in pages. */ srdl %r0,12 /* mmap2 takes the offset in pages. */
ltr %r0,%r0 /* Offset > 2^44 ? */ ltr %r0,%r0 /* Offset > 2^44 ? */
jnz 2f jnz 2f
st %r1,0x74(%r15) /* Store page offset. */ st %r1,0x74(%r15) /* Store page offset. */
la %r2,0x60(%r15) /* Load address of parameter list. */ la %r2,0x60(%r15) /* Load address of parameter list. */
svc SYS_ify(mmap2) /* Do the system call trap. */ svc SYS_ify(mmap2) /* Do the system call trap. */
#ifndef __ASSUME_MMAP2_SYSCALL #ifndef __ASSUME_MMAP2_SYSCALL
chi %r0,-ENOSYS chi %r0,-ENOSYS
je 1f je 1f
#endif #endif
l %r15,0(%r15) /* Load back chain. */ l %r15,0(%r15) /* Load back chain. */
lm %r6,%r15,24(%r15) /* Load registers. */ lm %r6,%r15,24(%r15) /* Load registers. */
/* Check gpr 2 for error. */ /* Check gpr 2 for error. */
lhi %r0,-4096 lhi %r0,-4096
clr %r2,%r0 clr %r2,%r0
jnl SYSCALL_ERROR_LABEL jnl SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */ /* Successful; return the syscall's value. */
br %r14 br %r14
#endif #endif
#if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2 #if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
1: lm %r0,%r1,216(%r15) /* Load 64 bit offset. */ 1: lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
st %r1,0x74(%r15) /* Store lower word of offset. */ st %r1,0x74(%r15) /* Store lower word of offset. */
ltr %r0,%r0 /* Offset > 2^32 ? */ ltr %r0,%r0 /* Offset > 2^32 ? */
jnz 2f jnz 2f
alr %r1,%r3 /* Add length to offset. */ alr %r1,%r3 /* Add length to offset. */
brc 3,2f /* Carry -> EINVAL. */ brc 3,2f /* Carry -> EINVAL. */
la %r2,0x60(%r15) /* Load address of parameter list. */ la %r2,0x60(%r15) /* Load address of parameter list. */
svc SYS_ify(mmap2) /* Do the system call trap. */ svc SYS_ify(mmap) /* Do the system call trap. */
l %r15,0(%r15) /* Load back chain. */ l %r15,0(%r15) /* Load back chain. */
lm %r6,%r15,24(%r15) /* Load registers. */ lm %r6,%r15,24(%r15) /* Load registers. */
/* Check gpr 2 for error. */ /* Check gpr 2 for error. */
lhi %r0,-4096 lhi %r0,-4096
clr %r2,%r0 clr %r2,%r0
jnl SYSCALL_ERROR_LABEL jnl SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */ /* Successful; return the syscall's value. */
br %r14 br %r14
#endif #endif
2: lhi %r2,-EINVAL 2: lhi %r2,-EINVAL
l %r15,0(%r15) /* Load back chain. */ l %r15,0(%r15) /* Load back chain. */
lm %r6,%r15,24(%r15) /* Load registers. */ lm %r6,%r15,24(%r15) /* Load registers. */
j SYSCALL_ERROR_LABEL j SYSCALL_ERROR_LABEL
PSEUDO_END (__mmap64) PSEUDO_END (__mmap64)
weak_alias (__mmap64, mmap64) weak_alias (__mmap64, mmap64)