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| author | Jeff Dike <jdike@addtoit.com> | 2007-05-06 14:51:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:13:02 -0700 |
| commit | f30c2c983e09470446ee00472f9d4a927fe2e9cb (patch) | |
| tree | 49d40dbf2143f178ce3a95f436c0a9db6f74394f /arch/um | |
| parent | 2e3f5251ac716879df6b6271f243f657c6e02e9a (diff) | |
| download | linux-stable-f30c2c983e09470446ee00472f9d4a927fe2e9cb.tar.gz linux-stable-f30c2c983e09470446ee00472f9d4a927fe2e9cb.tar.bz2 linux-stable-f30c2c983e09470446ee00472f9d4a927fe2e9cb.zip | |
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 <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | 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 29fd079c30b1..41bf8d1e14e0 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); |