91078fca0c
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By introducing a new sigframe so that the signal handler operates
on the new siginfo_t and on ucontext_t instead of sigcontext, we
now need two version of sendsig and sigreturn.
A flag in struct proc determines whether the process expects an
old sigframe or a new sigframe. The signal trampoline handles
which sigreturn to call. It does this by testing for a magic
cookie in the frame.
The alpha uses osigreturn to implement longjmp. This means that
osigreturn is not only used for compatibility with existing
binaries. To handle the new sigset_t, setjmp saves it in
sc_reserved (see NOTE).
the struct sigframe has been moved from frame.h to sigframe.h
to handle the complex header dependencies that was caused by
the new sigframe.
NOTE: For the i386, the size of jmp_buf has been increased to hold
the new sigset_t. On the alpha this has been prevented by
using sc_reserved in sigcontext.
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| .. | ||
| pc | ||
| apicreg.h | ||
| asm.h | ||
| asmacros.h | ||
| atomic.h | ||
| bus_amd64.h | ||
| bus_at386.h | ||
| bus_dma.h | ||
| bus_memio.h | ||
| bus_pio.h | ||
| bus.h | ||
| clock.h | ||
| cpu.h | ||
| cpufunc.h | ||
| cputypes.h | ||
| db_machdep.h | ||
| elf.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| ieeefp.h | ||
| md_var.h | ||
| mptable.h | ||
| npx.h | ||
| pcb_ext.h | ||
| pcb.h | ||
| pci_cfgreg.h | ||
| pcpu.h | ||
| pmap.h | ||
| proc.h | ||
| profile.h | ||
| psl.h | ||
| ptrace.h | ||
| reg.h | ||
| reloc.h | ||
| resource.h | ||
| segments.h | ||
| setjmp.h | ||
| sigframe.h | ||
| signal.h | ||
| smp.h | ||
| specialreg.h | ||
| sysarch.h | ||
| trap.h | ||
| tss.h | ||
| ucontext.h | ||
| varargs.h | ||
| vmparam.h | ||