be44d2aabc
Clean up the espfix code: - Introduced PER_CPU() macro to be used from asm - Introduced GET_DESC_BASE() macro to be used from asm - Rewrote the fixup code in asm, as calling a C code with the altered %ss appeared to be unsafe - No longer altering the stack from a .fixup section - 16bit per-cpu stack is no longer used, instead the stack segment base is patched the way so that the high word of the kernel and user %esp are the same. - Added the limit-patching for the espfix segment. (Chuck Ebbert) [jeremy@goop.org: use the x86 scaling addressing mode rather than shifting] Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Zachary Amsden <zach@vmware.com> Acked-by: Chuck Ebbert <76306.1226@compuserve.com> Acked-by: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@osdl.org>
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*
|
|
* 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/fixmap.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/elf.h>
|
|
|
|
#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));
|
|
|
|
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_cpu, thread_info, cpu);
|
|
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);
|
|
BLANK();
|
|
|
|
OFFSET(GDS_size, Xgt_desc_struct, size);
|
|
OFFSET(GDS_address, Xgt_desc_struct, address);
|
|
OFFSET(GDS_pad, Xgt_desc_struct, pad);
|
|
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, esp0) -
|
|
sizeof(struct tss_struct));
|
|
|
|
DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
|
|
DEFINE(VDSO_PRELINK, VDSO_PRELINK);
|
|
|
|
OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
|
|
}
|