Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f30c2c983e09470446ee00472f9d4a927fe2e9cb
Commit: f30c2c983e09470446ee00472f9d4a927fe2e9cb
Parent: 2e3f5251ac716879df6b6271f243f657c6e02e9a
Author: Jeff Dike <[EMAIL PROTECTED]>
AuthorDate: Sun May 6 14:51:29 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon May 7 12:13:02 2007 -0700
uml: dump registers on ptrace or wait failure
Provide a register dump if handle_trap fails. Abstract out ptrace_dump_regs
since it now has two callers.
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Cc: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/um/os-Linux/skas/process.c | 37 +++++++++++++++++++++++++------------
1 files changed, 25 insertions(+), 12 deletions(-)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 29fd079..41bf8d1 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -44,6 +44,22 @@ int is_skas_winch(int pid, int fd, void *data)
return(1);
}
+static int ptrace_dump_regs(int pid)
+{
+ unsigned long regs[MAX_REG_NR];
+ int i;
+
+ if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
+ return -errno;
+ else {
+ printk("Stub registers -\n");
+ for(i = 0; i < ARRAY_SIZE(regs); i++)
+ printk("\t%d - %lx\n", i, regs[i]);
+ }
+
+ return 0;
+}
+
void wait_stub_done(int pid, int sig, char * fname)
{
int n, status, err;
@@ -67,18 +83,10 @@ void wait_stub_done(int pid, int sig, char * fname)
if((n < 0) || !WIFSTOPPED(status) ||
(WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){
- unsigned long regs[MAX_REG_NR];
-
- if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
+ err = ptrace_dump_regs(pid);
+ if(err)
printk("Failed to get registers from stub, "
- "errno = %d\n", errno);
- else {
- int i;
-
- printk("Stub registers -\n");
- for(i = 0; i < ARRAY_SIZE(regs); i++)
- printk("\t%d - %lx\n", i, regs[i]);
- }
+ "errno = %d\n", -err);
panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
"pid = %d, n = %d, errno = %d, status = 0x%x\n",
fname, pid, n, errno, status);
@@ -142,9 +150,14 @@ static void handle_trap(int pid, union uml_pt_regs *regs,
int local_using_sysemu
CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED));
if((err < 0) || !WIFSTOPPED(status) ||
- (WSTOPSIG(status) != SIGTRAP + 0x80))
+ (WSTOPSIG(status) != SIGTRAP + 0x80)){
+ err = ptrace_dump_regs(pid);
+ if(err)
+ printk("Failed to get registers from process, "
+ "errno = %d\n", -err);
panic("handle_trap - failed to wait at end of syscall, "
"errno = %d, status = %d\n", errno, status);
+ }
}
handle_syscall(regs);
-
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