Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h

From: H. Peter Anvin <hpa@zytor.com>
Date: 2012-03-25 19:36:01
Also in: linux-arch, lkml
Reply to: Will Drewry, 2012-03-15

On 03/14/2012 08:11 PM, Will Drewry wrote:

quoted hunk ↗ jump to hunk

 
+static inline int syscall_get_arch(struct task_struct *task,
+				   struct pt_regs *regs)
+{
+#ifdef CONFIG_IA32_EMULATION
+	/*
+	 * TS_COMPAT is set for 32-bit syscall entries and then
+	 * remains set until we return to user mode.
+	 *
+	 * TIF_IA32 tasks should always have TS_COMPAT set at
+	 * system call time.
+	 */
+	if (task_thread_info(task)->status & TS_COMPAT)
+		return AUDIT_ARCH_I386;
+#endif
+	return AUDIT_ARCH_X86_64;
+}
 #endif	/* CONFIG_X86_32 */
 
 #endif	/* _ASM_X86_SYSCALL_H */

Just one FYI on this: after the x32 changes are upstream this can be
implemented in terms of is_ia32_task().

	-hpa

Will Drewry · 2012-03-15
[PATCH v15 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog · Will Drewry · 2012-03-15
Re: [PATCH v15 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog · Eric Dumazet · 2012-03-16
Re: [PATCH v15 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog · Will Drewry · 2012-03-16
[PATCH v15 03/13] seccomp: kill the seccomp_t typedef · Will Drewry · 2012-03-15
[PATCH v15 06/13] seccomp: add system call filtering using BPF · Will Drewry · 2012-03-15
Re: [PATCH v15 06/13] seccomp: add system call filtering using BPF · Vladimir Murzin · 2012-03-25
[PATCH v15 05/13] asm/syscall.h: add syscall_get_arch · Will Drewry · 2012-03-15
[PATCH v15 07/13] seccomp: remove duplicated failure logging · Will Drewry · 2012-03-15
[PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · Will Drewry · 2012-03-15
Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · H. Peter Anvin · 2012-03-25
Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · Will Drewry · 2012-04-11
Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · H. Peter Anvin · 2012-04-11
Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · H. Peter Anvin · 2012-04-11
Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h · Will Drewry · 2012-04-11
[PATCH v15 08/13] seccomp: add SECCOMP_RET_ERRNO · Will Drewry · 2012-03-15
[PATCH v15 01/13] sk_run_filter: add BPF_S_ANC_SECCOMP_LD_W · Will Drewry · 2012-03-15
Re: [PATCH v15 01/13] sk_run_filter: add BPF_S_ANC_SECCOMP_LD_W · Eric Dumazet · 2012-03-16
[PATCH v15 09/13] signal, x86: add SIGSYS info and make it synchronous. · Will Drewry · 2012-03-15
[PATCH v15 10/13] seccomp: Add SECCOMP_RET_TRAP · Will Drewry · 2012-03-15
[PATCH v15 12/13] x86: Enable HAVE_ARCH_SECCOMP_FILTER · Will Drewry · 2012-03-15
[PATCH v15 11/13] ptrace,seccomp: Add PTRACE_SECCOMP support · Will Drewry · 2012-03-15
Re: [PATCH v15 11/13] ptrace,seccomp: Add PTRACE_SECCOMP support · Indan Zupancic · 2012-03-15
Re: [PATCH v15 11/13] ptrace,seccomp: Add PTRACE_SECCOMP support · Will Drewry · 2012-03-15
[PATCH v15 13/13] Documentation: prctl/seccomp_filter · Will Drewry · 2012-03-15
H. Peter Anvin · 2012-03-25
Will Drewry · 2012-03-26
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