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-rw-r--r--qemu-doc.texi11
1 files changed, 11 insertions, 0 deletions
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 8e6cd506b8..04529a1157 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2507,6 +2507,17 @@ Activate log (logfile=/tmp/qemu.log)
Act as if the host page size was 'pagesize' bytes
@end table
+Environment variables:
+
+@table @env
+@item 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