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linux-user: Merge pread/pwrite into pread64/pwrite64

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The Linux syscalls underlying pread() and pwrite() take a 64 bit
offset on all architectures, even if some of them name the syscall
"pread/pwrite" rather than "pread64/pwrite64" for historical reasons.
So move the four QEMU target architectures (arm, i386, sparc,
unicore32) which were defining TARGET_NR_pread/pwrite to define
TARGET_NR_pread64/pwrite64 instead, and drop the TARGET_NR_pread/pwrite
implementation code completely.

(Based on examination of the kernel sources for the four architectures
this patch affects.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Peter Maydell 2012-10-12 03:55:51 +00:00 • committed by Blue Swirl
parent f877d09e63
commit 24c35a504e
6 changed files with 8 additions and 32 deletions
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18
linux-user/syscall.c
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@ -7449,24 +7449,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
goto unimplemented;
#endif
#endif
#ifdef TARGET_NR_pread
case TARGET_NR_pread:
if (regpairs_aligned(cpu_env))
arg4 = arg5;
if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
goto efault;
ret = get_errno(pread(arg1, p, arg3, arg4));
unlock_user(p, arg2, ret);
break;
case TARGET_NR_pwrite:
if (regpairs_aligned(cpu_env))
arg4 = arg5;
if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
goto efault;
ret = get_errno(pwrite(arg1, p, arg3, arg4));
unlock_user(p, arg2, 0);
break;
#endif
#ifdef TARGET_NR_pread64
case TARGET_NR_pread64:
if (regpairs_aligned(cpu_env)) {