| From | Srikar Dronamraju <> | Date | Tue, 20 Sep 2011 17:31:07 +0530 | Subject | [PATCH v5 3.1.0-rc4-tip 6/26] Uprobes: define fixups. |
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During the first insertion of a probepoint, instruction is analyzed for fixups and cached in the per-uprobe struct. On a probehit, the cached fixup is used. Fixup analysis and caching is done in arch-specific code.
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- include/linux/uprobes.h | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 50a8c67..074c4e9 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -33,6 +33,17 @@ struct vm_area_struct; #define MAX_UINSN_BYTES 4 #endif +#define uprobe_opcode_sz sizeof(uprobe_opcode_t) + +/* Post-execution fixups. Some architectures may define others. */ + +/* No fixup needed */ +#define UPROBES_FIX_NONE 0x0 +/* Adjust IP back to vicinity of actual insn */ +#define UPROBES_FIX_IP 0x1 +/* Adjust the return address of a call insn */ +#define UPROBES_FIX_CALL 0x2 + struct uprobe_consumer { int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); /* @@ -53,6 +64,7 @@ struct uprobe { struct inode *inode; /* Also hold a ref to inode */ loff_t offset; int copy; + u16 fixups; u8 insn[MAX_UINSN_BYTES]; };
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