i386: prepare shared kernel/asm-offsets.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 147 insertions, 0 deletions

diff --git a/arch/i386/kernel/asm-offsets_32.c b/arch/i386/kernel/asm-offsets_32.c
new file mode 100644
index 000000000000..7288ac88d746
--- /dev/null
+++ b/arch/i386/kernel/asm-offsets_32.c
@@ -0,0 +1,147 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/crypto.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/personality.h>
+#include <linux/suspend.h>
+#include <asm/ucontext.h>
+#include "sigframe.h"
+#include <asm/pgtable.h>
+#include <asm/fixmap.h>
+#include <asm/processor.h>
+#include <asm/thread_info.h>
+#include <asm/elf.h>
+
+#include <xen/interface/xen.h>
+
+#ifdef CONFIG_LGUEST_GUEST
+#include <linux/lguest.h>
+#include "../../../drivers/lguest/lg.h"
+#endif
+
+#define DEFINE(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+#define OFFSET(sym, str, mem) \
+        DEFINE(sym, offsetof(struct str, mem));
+
+/* workaround for a warning with -Wmissing-prototypes */
+void foo(void);
+
+void foo(void)
+{
+        OFFSET(SIGCONTEXT_eax, sigcontext, eax);
+        OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
+        OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
+        OFFSET(SIGCONTEXT_edx, sigcontext, edx);
+        OFFSET(SIGCONTEXT_esi, sigcontext, esi);
+        OFFSET(SIGCONTEXT_edi, sigcontext, edi);
+        OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
+        OFFSET(SIGCONTEXT_esp, sigcontext, esp);
+        OFFSET(SIGCONTEXT_eip, sigcontext, eip);
+        BLANK();
+
+        OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
+        OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
+        OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
+        OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
+        OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
+        OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
+        OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
+        OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
+        BLANK();
+
+        OFFSET(TI_task, thread_info, task);
+        OFFSET(TI_exec_domain, thread_info, exec_domain);
+        OFFSET(TI_flags, thread_info, flags);
+        OFFSET(TI_status, thread_info, status);
+        OFFSET(TI_preempt_count, thread_info, preempt_count);
+        OFFSET(TI_addr_limit, thread_info, addr_limit);
+        OFFSET(TI_restart_block, thread_info, restart_block);
+        OFFSET(TI_sysenter_return, thread_info, sysenter_return);
+        OFFSET(TI_cpu, thread_info, cpu);
+        BLANK();
+
+        OFFSET(GDS_size, Xgt_desc_struct, size);
+        OFFSET(GDS_address, Xgt_desc_struct, address);
+        OFFSET(GDS_pad, Xgt_desc_struct, pad);
+        BLANK();
+
+        OFFSET(PT_EBX, pt_regs, ebx);
+        OFFSET(PT_ECX, pt_regs, ecx);
+        OFFSET(PT_EDX, pt_regs, edx);
+        OFFSET(PT_ESI, pt_regs, esi);
+        OFFSET(PT_EDI, pt_regs, edi);
+        OFFSET(PT_EBP, pt_regs, ebp);
+        OFFSET(PT_EAX, pt_regs, eax);
+        OFFSET(PT_DS,  pt_regs, xds);
+        OFFSET(PT_ES,  pt_regs, xes);
+        OFFSET(PT_FS,  pt_regs, xfs);
+        OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
+        OFFSET(PT_EIP, pt_regs, eip);
+        OFFSET(PT_CS,  pt_regs, xcs);
+        OFFSET(PT_EFLAGS, pt_regs, eflags);
+        OFFSET(PT_OLDESP, pt_regs, esp);
+        OFFSET(PT_OLDSS,  pt_regs, xss);
+        BLANK();
+
+        OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
+        OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
+        BLANK();
+
+        OFFSET(pbe_address, pbe, address);
+        OFFSET(pbe_orig_address, pbe, orig_address);
+        OFFSET(pbe_next, pbe, next);
+
+        /* Offset from the sysenter stack to tss.esp0 */
+        DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, x86_tss.esp0) -
+                 sizeof(struct tss_struct));
+
+        DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
+        DEFINE(PAGE_SHIFT_asm, PAGE_SHIFT);
+        DEFINE(PTRS_PER_PTE, PTRS_PER_PTE);
+        DEFINE(PTRS_PER_PMD, PTRS_PER_PMD);
+        DEFINE(PTRS_PER_PGD, PTRS_PER_PGD);
+
+        DEFINE(VDSO_PRELINK_asm, VDSO_PRELINK);
+
+        OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
+
+#ifdef CONFIG_PARAVIRT
+        BLANK();
+        OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
+        OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
+        OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
+        OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
+        OFFSET(PARAVIRT_iret, paravirt_ops, iret);
+        OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
+#endif
+
+#ifdef CONFIG_XEN
+        BLANK();
+        OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
+        OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
+#endif
+
+#ifdef CONFIG_LGUEST_GUEST
+        BLANK();
+        OFFSET(LGUEST_DATA_irq_enabled, lguest_data, irq_enabled);
+        OFFSET(LGUEST_PAGES_host_gdt_desc, lguest_pages, state.host_gdt_desc);
+        OFFSET(LGUEST_PAGES_host_idt_desc, lguest_pages, state.host_idt_desc);
+        OFFSET(LGUEST_PAGES_host_cr3, lguest_pages, state.host_cr3);
+        OFFSET(LGUEST_PAGES_host_sp, lguest_pages, state.host_sp);
+        OFFSET(LGUEST_PAGES_guest_gdt_desc, lguest_pages,state.guest_gdt_desc);
+        OFFSET(LGUEST_PAGES_guest_idt_desc, lguest_pages,state.guest_idt_desc);
+        OFFSET(LGUEST_PAGES_guest_gdt, lguest_pages, state.guest_gdt);
+        OFFSET(LGUEST_PAGES_regs_trapnum, lguest_pages, regs.trapnum);
+        OFFSET(LGUEST_PAGES_regs_errcode, lguest_pages, regs.errcode);
+        OFFSET(LGUEST_PAGES_regs, lguest_pages, regs);
+#endif
+}