diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-08-30 23:56:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-31 01:42:22 -0700 |
| commit | d1254b12c93e1e586137a2ffef71fd33cf273f35 (patch) | |
| tree | b122f08030c920608996eb52cce1068030ffd3b6 /arch/um/os-Linux | |
| parent | c7ec16da5adc1c1b341b2a83bde7add17dcf811a (diff) | |
uml: fix x86_64 core dump crash
Stop UML crashing when trying to dump a process core on x86_64. This is the
minimal fix to stop the crash - more things are broken here, and patches are
forthcoming.
The immediate thing to do is define ELF_CORE_COPY_REGS and
ELF_CORE_COPY_FPREGS. Defining ELF_CORE_COPY_FPREGS allows dump_fpu to go
away. It is defined in terms of save_fp_registers, so that needs to be added.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/os-Linux')
| -rw-r--r-- | arch/um/os-Linux/sys-x86_64/registers.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c index e6fc2179d1bc..9467315b8059 100644 --- a/arch/um/os-Linux/sys-x86_64/registers.c +++ b/arch/um/os-Linux/sys-x86_64/registers.c @@ -4,6 +4,7 @@ */ #include <errno.h> +#include <sys/ptrace.h> #include <string.h> #include "ptrace_user.h" #include "uml-config.h" @@ -17,6 +18,20 @@ static unsigned long exec_regs[MAX_REG_NR]; static unsigned long exec_fp_regs[HOST_FP_SIZE]; +int save_fp_registers(int pid, unsigned long *fp_regs) +{ + if(ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0) + return -errno; + return 0; +} + +int restore_fp_registers(int pid, unsigned long *fp_regs) +{ + if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0) + return -errno; + return 0; +} + void init_thread_registers(union uml_pt_regs *to) { memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs)); |