[Qemu-devel] ARM syscall 186.

[James Pellow]

Hi All,

In the quest for a running gentoo, I found the need for ARM syscall 186.  This 
is required to get ncurses to install.  This seems to work for me, though I 
have only tested it in the context of an ncurses install.  Let me know if 
something isn't right and I will fix it.  I spent a bit more time looking at 
the proper way to handle things this time, so I am pretty sure this is 
actually correct :)  Thanks for any feedback.  Here is the patch:

------------------------------------------------------------------------------------------------------------

diff -ruN qemu-0.6.1/linux-user/syscall.c qemu-0.6.1_new/linux-user/syscall.c
--- qemu-0.6.1/linux-user/syscall.c     2004-11-14 12:51:33.000000000 -0800
+++ qemu-0.6.1_new/linux-user/syscall.c 2004-12-06 00:05:26.139467848 -0800
@@ -2700,7 +2700,23 @@
     case TARGET_NR_capset:
         goto unimplemented;
     case TARGET_NR_sigaltstack:
-        goto unimplemented;
+        {
+           struct target_stack_t *ss_target  = (void *)arg1;
+           struct target_stack_t *oss_target = (void *)arg2;
+           stack_t ss, oss;
+
+           ss.ss_sp    = (void *)tswapl(ss_target->ss_sp);
+           ss.ss_flags = tswap32(ss_target->ss_flags);
+           ss.ss_size  = tswapl(ss_target->ss_size);
+
+           ret = get_errno(sigaltstack(&ss, &oss));
+           if (!is_error(ret) && oss_target != NULL) {
+               oss_target->ss_sp    = tswapl((long)oss.ss_sp);
+               oss_target->ss_flags = tswap32(oss.ss_flags);
+               oss_target->ss_size  = tswapl(oss.ss_size);
+           }
+        }
+        break;
     case TARGET_NR_sendfile:
         goto unimplemented;
 #ifdef TARGET_NR_getpmsg
diff -ruN qemu-0.6.1/linux-user/syscall_defs.h 
qemu-0.6.1_new/linux-user/syscall_defs.h
--- qemu-0.6.1/linux-user/syscall_defs.h        2004-11-14 12:51:33.000000000 
-0800
+++ qemu-0.6.1_new/linux-user/syscall_defs.h    2004-12-05 22:40:00.249721536 
-0800
@@ -97,6 +97,12 @@
 #define TARGET_IOWU(type,nr)   TARGET_IOC(TARGET_IOC_WRITE,(type),
(nr),TARGET_IOC_SIZEMASK)
 #define TARGET_IOWRU(type,nr)  TARGET_IOC(TARGET_IOC_READ|TARGET_IOC_WRITE,
(type),(nr),TARGET_IOC_SIZEMASK)

+struct target_stack_t {
+    target_long ss_sp;
+    int         ss_flags;
+    target_long ss_size;
+};
+
 struct target_sockaddr {
     uint16_t sa_family;
     uint8_t sa_data[14];

---------------------------------------------------------------------------------------------------------------

Cheers,

-- 
*****************************
James A. Pellow, President
Alent Design Solutions
www.alentdesignsolutions.com
(509) 526-0682
*****************************