From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-parisc/compat_rt_sigframe.h | 50 +++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 include/asm-parisc/compat_rt_sigframe.h (limited to 'include/asm-parisc/compat_rt_sigframe.h') diff --git a/include/asm-parisc/compat_rt_sigframe.h b/include/asm-parisc/compat_rt_sigframe.h new file mode 100644 index 000000000000..81bec28bdc48 --- /dev/null +++ b/include/asm-parisc/compat_rt_sigframe.h @@ -0,0 +1,50 @@ +#include +#include +#include + +#ifndef _ASM_PARISC_COMPAT_RT_SIGFRAME_H +#define _ASM_PARISC_COMPAT_RT_SIGFRAME_H + +/* In a deft move of uber-hackery, we decide to carry the top half of all + * 64-bit registers in a non-portable, non-ABI, hidden structure. + * Userspace can read the hidden structure if it *wants* but is never + * guaranteed to be in the same place. Infact the uc_sigmask from the + * ucontext_t structure may push the hidden register file downards + */ +struct compat_regfile { + /* Upper half of all the 64-bit registers that were truncated + on a copy to a 32-bit userspace */ + compat_int_t rf_gr[32]; + compat_int_t rf_iasq[2]; + compat_int_t rf_iaoq[2]; + compat_int_t rf_sar; +}; + +#define COMPAT_SIGRETURN_TRAMP 4 +#define COMPAT_SIGRESTARTBLOCK_TRAMP 5 +#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + COMPAT_SIGRESTARTBLOCK_TRAMP) + +struct compat_rt_sigframe { + /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c + Secondary to that it must protect the ERESTART_RESTARTBLOCK + trampoline we left on the stack (we were bad and didn't + change sp so we could run really fast.) */ + compat_uint_t tramp[COMPAT_TRAMP_SIZE]; + compat_siginfo_t info; + struct compat_ucontext uc; + /* Hidden location of truncated registers, *must* be last. */ + struct compat_regfile regs; +}; + +/* + * The 32-bit ABI wants at least 48 bytes for a function call frame: + * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of + * which Linux/parisc uses is sp-20 for the saved return pointer...) + * Then, the stack pointer must be rounded to a cache line (64 bytes). + */ +#define SIGFRAME32 64 +#define FUNCTIONCALLFRAME32 48 +#define PARISC_RT_SIGFRAME_SIZE32 \ + (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) + +#endif -- cgit v1.2.3