This patch adds documentation for the QEMU_STRACE environment setting.
Index: qemu/qemu-doc.texi
===================================================================
--- qemu.orig/qemu-doc.texi 2007-12-11 19:00:53.000000000 -0700
+++ qemu/qemu-doc.texi 2007-12-11 19:16:28.000000000 -0700
@@ -2437,6 +2437,17 @@
Act as if the host page size was 'pagesize' bytes
@end table
+Environment variables:
+
[EMAIL PROTECTED] @env
[EMAIL PROTECTED] QEMU_STRACE
+Print system calls and arguments similar to the 'strace' program
+(NOTE: the actual 'strace' program will not work because the user
+space emulator hasn't implemented ptrace). At the moment this is
+incomplete. All system calls that don't have a specific argument
+format are printed with information for six arguments. Many
+flag-style arguments don't have decoders and will show up as numbers.
+
@node Other binaries
@subsection Other binaries
Index: qemu/linux-user/main.c
===================================================================
--- qemu.orig/linux-user/main.c 2007-12-11 19:02:01.000000000 -0700
+++ qemu/linux-user/main.c 2007-12-11 19:14:57.000000000 -0700
@@ -1943,7 +1943,12 @@
"debug options:\n"
"-d options activate log (logfile=%s)\n"
"-p pagesize set the host page size to 'pagesize'\n"
- "-strace log system calls\n",
+ "-strace log system calls\n"
+ "\n"
+ "environment variables:\n"
+ "QEMU_STRACE Print system calls and arguments similar to the\n"
+ " 'strace' program. Enable by setting to any value.\n"
+ ,
TARGET_ARCH,
interp_prefix,
x86_stack_size,
