d4d6715016
This unifies and cleans up the syscall tracing code on i386 and x86_64. Using a single function for entry and exit tracing on 32-bit made the do_syscall_trace() into some terrible spaghetti. The logic is clear and simple using separate syscall_trace_enter() and syscall_trace_leave() functions as on 64-bit. The unification adds PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP support on x86_64, for 32-bit ptrace() callers and for 64-bit ptrace() callers tracing either 32-bit or 64-bit tasks. It behaves just like 32-bit. Changing syscall_trace_enter() to return the syscall number shortens all the assembly paths, while adding the SYSEMU feature in a simple way. Signed-off-by: Roland McGrath <roland@redhat.com>
144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
#ifndef _ASM_X86_PTRACE_ABI_H
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#define _ASM_X86_PTRACE_ABI_H
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#ifdef __i386__
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#define EBX 0
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#define ECX 1
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#define EDX 2
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#define ESI 3
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#define EDI 4
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#define EBP 5
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#define EAX 6
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#define DS 7
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#define ES 8
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#define FS 9
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#define GS 10
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#define ORIG_EAX 11
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#define EIP 12
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#define CS 13
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#define EFL 14
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#define UESP 15
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#define SS 16
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#define FRAME_SIZE 17
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#else /* __i386__ */
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#if defined(__ASSEMBLY__) || defined(__FRAME_OFFSETS)
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#define R15 0
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#define R14 8
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#define R13 16
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#define R12 24
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#define RBP 32
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#define RBX 40
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/* arguments: interrupts/non tracing syscalls only save upto here*/
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#define R11 48
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#define R10 56
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#define R9 64
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#define R8 72
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#define RAX 80
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#define RCX 88
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#define RDX 96
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#define RSI 104
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#define RDI 112
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#define ORIG_RAX 120 /* = ERROR */
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/* end of arguments */
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/* cpu exception frame or undefined in case of fast syscall. */
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#define RIP 128
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#define CS 136
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#define EFLAGS 144
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#define RSP 152
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#define SS 160
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#define ARGOFFSET R11
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#endif /* __ASSEMBLY__ */
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/* top of stack page */
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#define FRAME_SIZE 168
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#endif /* !__i386__ */
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/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
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#define PTRACE_GETREGS 12
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#define PTRACE_SETREGS 13
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#define PTRACE_GETFPREGS 14
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#define PTRACE_SETFPREGS 15
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#define PTRACE_GETFPXREGS 18
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#define PTRACE_SETFPXREGS 19
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#define PTRACE_OLDSETOPTIONS 21
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/* only useful for access 32bit programs / kernels */
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#define PTRACE_GET_THREAD_AREA 25
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#define PTRACE_SET_THREAD_AREA 26
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#ifdef __x86_64__
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# define PTRACE_ARCH_PRCTL 30
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#endif
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#define PTRACE_SYSEMU 31
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#define PTRACE_SYSEMU_SINGLESTEP 32
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#define PTRACE_SINGLEBLOCK 33 /* resume execution until next branch */
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#ifndef __ASSEMBLY__
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#include <asm/types.h>
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/* configuration/status structure used in PTRACE_BTS_CONFIG and
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PTRACE_BTS_STATUS commands.
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*/
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struct ptrace_bts_config {
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/* requested or actual size of BTS buffer in bytes */
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__u32 size;
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/* bitmask of below flags */
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__u32 flags;
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/* buffer overflow signal */
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__u32 signal;
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/* actual size of bts_struct in bytes */
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__u32 bts_size;
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};
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#endif
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#define PTRACE_BTS_O_TRACE 0x1 /* branch trace */
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#define PTRACE_BTS_O_SCHED 0x2 /* scheduling events w/ jiffies */
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#define PTRACE_BTS_O_SIGNAL 0x4 /* send SIG<signal> on buffer overflow
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instead of wrapping around */
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#define PTRACE_BTS_O_CUT_SIZE 0x8 /* cut requested size to max available
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instead of failing */
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#define PTRACE_BTS_CONFIG 40
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/* Configure branch trace recording.
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ADDR points to a struct ptrace_bts_config.
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DATA gives the size of that buffer.
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A new buffer is allocated, iff the size changes.
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Returns the number of bytes read.
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*/
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#define PTRACE_BTS_STATUS 41
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/* Return the current configuration in a struct ptrace_bts_config
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pointed to by ADDR; DATA gives the size of that buffer.
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Returns the number of bytes written.
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*/
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#define PTRACE_BTS_SIZE 42
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/* Return the number of available BTS records.
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DATA and ADDR are ignored.
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*/
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#define PTRACE_BTS_GET 43
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/* Get a single BTS record.
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DATA defines the index into the BTS array, where 0 is the newest
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entry, and higher indices refer to older entries.
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ADDR is pointing to struct bts_struct (see asm/ds.h).
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*/
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#define PTRACE_BTS_CLEAR 44
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/* Clear the BTS buffer.
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DATA and ADDR are ignored.
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*/
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#define PTRACE_BTS_DRAIN 45
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/* Read all available BTS records and clear the buffer.
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ADDR points to an array of struct bts_struct.
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DATA gives the size of that buffer.
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BTS records are read from oldest to newest.
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Returns number of BTS records drained.
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*/
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#endif
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