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a5f6096c80
Handle floating point state in across signals correctly. UML/i386 needs to know whether the host does PTRACE_[GS]ETFPXREGS, so an arch_init_registers hook is added, which on x86_64 does nothing. UML doesn't save and restore floating point registers on kernel entry and exit, so they need to be copied between the host process and the sigcontext. save_fpx_registers and restore_fpx_registers are added for this purpose. save_fp_registers and restore_fp_registers already exist. There was a bunch of floating point state conversion code in arch/um/sys-i386/ptrace.c which isn't needed there, but is needed in signal.c, so it is moved over. The i386 code now distinguishes between fp and fpx state and handles them correctly. The x86_64 code just needs to copy state as-is between the host process and the stack. There are also some fixes there to pass the correct address of the floating point state around. 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> |
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| .. | ||
| bug.c | ||
| bugs.c | ||
| checksum.S | ||
| delay.c | ||
| fault.c | ||
| ksyms.c | ||
| ldt.c | ||
| Makefile | ||
| ptrace.c | ||
| ptrace_user.c | ||
| setjmp.S | ||
| sigcontext.c | ||
| signal.c | ||
| stub.S | ||
| stub_segv.c | ||
| sys_call_table.S | ||
| syscalls.c | ||
| sysrq.c | ||
| tls.c | ||
| user-offsets.c | ||