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Merge branch 'x86-ptrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'x86-ptrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, ptrace: Remove set_stopped_child_used_math() in [x]fpregs_set
  x86, ptrace: Simplify xstateregs_get()
  ptrace: Fix ptrace_regset() comments and diagnose errors specifically
  parisc: Disable CONFIG_HAVE_ARCH_TRACEHOOK
  ptrace: Add support for generic PTRACE_GETREGSET/PTRACE_SETREGSET
  x86, ptrace: regset extensions to support xstate
This commit is contained in:
Linus Torvalds 2010-02-28 10:59:44 -08:00
commit 6f5621cb16
9 changed files with 284 additions and 9 deletions
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7
include/linux/elf.h
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@ -349,7 +349,11 @@ typedef struct elf64_shdr {
#define ELF_OSABI ELFOSABI_NONE
#endif
/* Notes used in ET_CORE */
/*
* Notes used in ET_CORE. Architectures export some of the arch register sets
* using the corresponding note types via the PTRACE_GETREGSET and
* PTRACE_SETREGSET requests.
*/
#define NT_PRSTATUS 1
#define NT_PRFPREG 2
#define NT_PRPSINFO 3
@ -361,6 +365,7 @@ typedef struct elf64_shdr {
#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
#define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
#define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
#define NT_S390_TIMER 0x301 /* s390 timer register */
#define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */

20
include/linux/ptrace.h
View file

@ -27,6 +27,26 @@
#define PTRACE_GETSIGINFO 0x4202
#define PTRACE_SETSIGINFO 0x4203
/*
* Generic ptrace interface that exports the architecture specific regsets
* using the corresponding NT_* types (which are also used in the core dump).
* Please note that the NT_PRSTATUS note type in a core dump contains a full
* 'struct elf_prstatus'. But the user_regset for NT_PRSTATUS contains just the
* elf_gregset_t that is the pr_reg field of 'struct elf_prstatus'. For all the
* other user_regset flavors, the user_regset layout and the ELF core dump note
* payload are exactly the same layout.
*
* This interface usage is as follows:
* struct iovec iov = { buf, len};
*
* ret = ptrace(PTRACE_GETREGSET/PTRACE_SETREGSET, pid, NT_XXX_TYPE, &iov);
*
* On the successful completion, iov.len will be updated by the kernel,
* specifying how much the kernel has written/read to/from the user's iov.buf.
*/
#define PTRACE_GETREGSET 0x4204
#define PTRACE_SETREGSET 0x4205
/* options set using PTRACE_SETOPTIONS */
#define PTRACE_O_TRACESYSGOOD 0x00000001
#define PTRACE_O_TRACEFORK 0x00000002