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[Qemu-devel] [PATCH 4/4] linux-user: define new environment variables
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH 4/4] linux-user: define new environment variables |
Date: |
Sun, 18 Sep 2011 11:37:10 +0200 |
From: Laurent Vivier <address@hidden>
QEMU_GDB=port allows to define gdb server port to wait on.
QEMU_DEBUG=options allows to activate log file (like -d options)
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/main.c | 14 +++++++++++---
qemu-doc.texi | 4 ++++
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 40d76b4..9d161c4 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2822,8 +2822,10 @@ static void usage(void)
"-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"
+ "QEMU_STRACE Print system calls and arguments similar to
the\n"
+ " 'strace' program. Enable by setting to any
value.\n"
+ "QEMU_DEBUG=options Activate log. Use same options as '-d'
options\n"
+ "QEMU_GDB=port Wait gdb connection to port\n"
"You can use -E and -U options to set/unset environment variables\n"
"for target process. It is possible to provide several variables\n"
"by repeating the option. For example:\n"
@@ -2879,7 +2881,7 @@ int main(int argc, char **argv, char **envp)
const char *filename;
const char *cpu_model;
const char *log_file = DEBUG_LOGFILE;
- const char *log_mask = NULL;
+ const char *log_mask = getenv("QEMU_DEBUG");
struct target_pt_regs regs1, *regs = ®s1;
struct image_info info1, *info = &info1;
struct linux_binprm bprm;
@@ -2926,6 +2928,12 @@ int main(int argc, char **argv, char **envp)
#if defined(cpudef_setup)
cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
#endif
+ if (getenv("QEMU_GDB")) {
+ gdbstub_port = atoi(getenv("QEMU_GDB"));
+ }
+ /* don't propagate QEMU_DEBUG and _GDB to children */
+ unsetenv("QEMU_DEBUG");
+ unsetenv("QEMU_GDB");
optind = 1;
for(;;) {
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 31199f6..2193463 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2293,6 +2293,10 @@ 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.
address@hidden QEMU_DEBUG=options
+Activate log. Use same options as '-d' options.
address@hidden QEMU_GDB=port
+Wait gdb connection to port.
@end table
@node Other binaries
--
1.7.1