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[Qemu-devel] [PATCH 06/15] linux-user: Implement prlimit64 syscall
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PATCH 06/15] linux-user: Implement prlimit64 syscall |
Date: |
Wed, 13 Jul 2011 17:48:45 +0300 |
From: Peter Maydell <address@hidden>
Implement the prlimit64 syscall.
Slightly modified to apply upstream -Riku
Signed-off-by: Peter Maydell <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/syscall.c | 43 +++++++++++++++++++++++++++++++++++++++++++
linux-user/syscall_defs.h | 4 ++++
2 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index fed7a8f..e2f356b 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -559,6 +559,21 @@ _syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds,
fd_set *, writefds,
fd_set *, exceptfds, struct timespec *, timeout, void *, sig);
#endif
+#if defined(TARGET_NR_prlimit64)
+#ifndef __NR_prlimit64
+# define __NR_prlimit64 -1
+#endif
+#define __NR_sys_prlimit64 __NR_prlimit64
+/* The glibc rlimit structure may not be that used by the underlying syscall */
+struct host_rlimit64 {
+ uint64_t rlim_cur;
+ uint64_t rlim_max;
+};
+_syscall4(int, sys_prlimit64, pid_t, pid, int, resource,
+ const struct host_rlimit64 *, new_limit,
+ struct host_rlimit64 *, old_limit)
+#endif
+
extern int personality(int);
extern int flock(int, int);
extern int setfsuid(int);
@@ -7990,6 +8005,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
}
#endif
#endif
+#ifdef TARGET_NR_prlimit64
+ case TARGET_NR_prlimit64:
+ {
+ /* args: pid, resource number, ptr to new rlimit, ptr to old rlimit */
+ struct target_rlimit64 *target_rnew, *target_rold;
+ struct host_rlimit64 rnew, rold, *rnewp = 0;
+ if (arg3) {
+ if (!lock_user_struct(VERIFY_READ, target_rnew, arg3, 1)) {
+ goto efault;
+ }
+ rnew.rlim_cur = tswap64(target_rnew->rlim_cur);
+ rnew.rlim_max = tswap64(target_rnew->rlim_max);
+ unlock_user_struct(target_rnew, arg3, 0);
+ rnewp = &rnew;
+ }
+
+ ret = get_errno(sys_prlimit64(arg1, arg2, rnewp, arg4 ? &rold : 0));
+ if (!is_error(ret) && arg4) {
+ if (!lock_user_struct(VERIFY_WRITE, target_rold, arg4, 1)) {
+ goto efault;
+ }
+ target_rold->rlim_cur = tswap64(rold.rlim_cur);
+ target_rold->rlim_max = tswap64(rold.rlim_max);
+ unlock_user_struct(target_rold, arg4, 1);
+ }
+ break;
+ }
+#endif
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 1b73451..1fdc84d 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2293,3 +2293,7 @@ struct target_epoll_event {
target_epoll_data_t data;
};
#endif
+struct target_rlimit64 {
+ uint64_t rlim_cur;
+ uint64_t rlim_max;
+};
--
1.7.4.1
- [Qemu-devel] [PATCH 00/15] v2: pending linux-user patches, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 03/15] linux-user: Add support for more VT ioctls, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 04/15] linux-user: Add support for even more FB ioctls, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 05/15] linux-user: Add syscall numbers from kernel 2.6.39.2, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 01/15] arm-semi: Provide access to CLI arguments passed through the "-append" option, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 06/15] linux-user: Implement prlimit64 syscall,
riku . voipio <=
- [Qemu-devel] [PATCH 02/15] linux-user: Add support for KD...LED ioctls, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 07/15] linux-user/syscall.c: Enforce pselect6 sigset size restrictions, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 08/15] mips: sigaltstack args, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 09/15] mips: missing syscall returns wrong errno, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 11/15] mips: rlimit incorrectly converts values, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 10/15] mips: null pointer deref should segfault, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 13/15] linux-user: correct syscall 123 on sh4, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 14/15] linux-user: make MIPS and ARM eabi use same argument reordering, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 12/15] mips: rlimit codes are not the same, riku . voipio, 2011/07/13
- [Qemu-devel] [PATCH 15/15] linux-user/signal.c: Rename s390 target_ucontext fields to fix ia64, riku . voipio, 2011/07/13