arch.h revision 585f60f7b171a391fbd5149f3d397d192168a67c 
1#ifndef LTRACE_PPC_ARCH_H
2#define LTRACE_PPC_ARCH_H
3
4#include <gelf.h>
5
6#define BREAKPOINT_VALUE { 0x7f, 0xe0, 0x00, 0x08 }
7#define BREAKPOINT_LENGTH 4
8#define DECR_PC_AFTER_BREAK 0
9
10#define LT_ELFCLASS	ELFCLASS32
11#define LT_ELF_MACHINE	EM_PPC
12
13#ifdef __powerpc64__ // Says 'ltrace' is 64 bits, says nothing about target.
14#define LT_ELFCLASS2	ELFCLASS64
15#define LT_ELF_MACHINE2	EM_PPC64
16#define ARCH_SUPPORTS_OPD
17#endif
18
19#define PLT_REINITALISATION_BP    "_start"
20
21#define ARCH_HAVE_UMOVELONG
22#define ARCH_HAVE_ATOMIC_SINGLESTEP
23#define ARCH_HAVE_ADD_PLT_ENTRY
24#define ARCH_HAVE_TRANSLATE_ADDRESS
25#define ARCH_HAVE_DYNLINK_DONE
26
27struct library_symbol;
28
29#define ARCH_HAVE_LTELF_DATA
30struct arch_ltelf_data {
31	GElf_Addr plt_stub_vma;
32	struct library_symbol *stubs;
33	int secure_plt;
34};
35
36#define ARCH_HAVE_LIBRARY_DATA
37struct arch_library_data {
38	int bss_plt_prelinked;
39};
40
41enum ppc64_plt_type {
42	/* Either a non-PLT symbol, or PPC32 symbol.  */
43	PPC_DEFAULT = 0,
44
45	/* PPC64 STUB, never resolved.  */
46	PPC64_PLT_STUB,
47
48	/* Unresolved PLT symbol (.plt contains PLT address).  */
49	PPC_PLT_UNRESOLVED,
50
51	/* Resolved PLT symbol.  The corresponding .plt slot contained
52	 * target address, which was changed to the address of
53	 * corresponding PLT entry.  The original is now saved in
54	 * RESOLVED_VALUE.  */
55	PPC_PLT_RESOLVED,
56};
57
58#define ARCH_HAVE_LIBRARY_SYMBOL_DATA
59struct arch_library_symbol_data {
60	enum ppc64_plt_type type;
61	GElf_Addr resolved_value;
62
63	/* Address of corresponding slot in .plt.  */
64	GElf_Addr plt_slot_addr;
65};
66
67#define ARCH_HAVE_BREAKPOINT_DATA
68struct arch_breakpoint_data {
69	/* We need this just for arch_breakpoint_init.  */
70};
71
72#define ARCH_HAVE_PROCESS_DATA
73struct arch_process_data {
74	/* Breakpoint that hits when the dynamic linker is about to
75	 * update a .plt slot.  NULL before that address is known.  */
76	struct breakpoint *dl_plt_update_bp;
77
78	/* PLT update breakpoint looks here for the handler.  */
79	struct process_stopping_handler *handler;
80};
81
82#endif /* LTRACE_PPC_ARCH_H */
83