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authorbalrog <balrog@c046a42c-6fe2-441c-8c8c-71466251a162>2007-12-16 13:05:59 +0000
committerbalrog <balrog@c046a42c-6fe2-441c-8c8c-71466251a162>2007-12-16 13:05:59 +0000
commitb01bcae61cef515797a3f353aaff9f55b27ee0d1 (patch)
tree0e7001aa8ae58dcbaedfa416d113e4fc4cc4f6ff
parentc6d29ad6e24533cc3762e1d654275607e1d03058 (diff)
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QEMU_STRACE documentation bit by Thayne Harbaugh.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3822 c046a42c-6fe2-441c-8c8c-71466251a162
-rw-r--r--linux-user/main.c7
-rw-r--r--qemu-doc.texi11
2 files changed, 17 insertions, 1 deletions
diff --git a/linux-user/main.c b/linux-user/main.c
index 379ac29..baa9073 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -1906,7 +1906,12 @@ void usage(void)
"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,
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 8e6cd50..04529a1 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