提交 50b2b2e6 编写于 作者: N Nicolas Pitre

ARM: add ELF_FDPIC support

This includes the necessary code to recognise the FDPIC format on ARM
and the ptrace command definitions used by the common ptrace code.

Based on patches originally from Mickael Guene <mickael.guene@st.com>.
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NMickael GUENE <mickael.guene@st.com>
Tested-by: NVincent Abriou <vincent.abriou@st.com>
Tested-by: NAndras Szemzo <szemzo.andras@gmail.com>
上级 5c165953
...@@ -100,6 +100,11 @@ struct elf32_hdr; ...@@ -100,6 +100,11 @@ struct elf32_hdr;
extern int elf_check_arch(const struct elf32_hdr *); extern int elf_check_arch(const struct elf32_hdr *);
#define elf_check_arch elf_check_arch #define elf_check_arch elf_check_arch
#define ELFOSABI_ARM_FDPIC 65 /* ARM FDPIC platform */
#define elf_check_fdpic(x) ((x)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
#define elf_check_const_displacement(x) ((x)->e_flags & EF_ARM_PIC)
#define ELF_FDPIC_CORE_EFLAGS 0
#define vmcore_elf64_check_arch(x) (0) #define vmcore_elf64_check_arch(x) (0)
extern int arm_elf_read_implies_exec(int); extern int arm_elf_read_implies_exec(int);
...@@ -120,6 +125,13 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs); ...@@ -120,6 +125,13 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
have no such handler. */ have no such handler. */
#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0 #define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
do { \
(_r)->ARM_r7 = _exec_map_addr; \
(_r)->ARM_r8 = _interp_map_addr; \
(_r)->ARM_r9 = dynamic_addr; \
} while(0)
extern void elf_set_personality(const struct elf32_hdr *); extern void elf_set_personality(const struct elf32_hdr *);
#define SET_PERSONALITY(ex) elf_set_personality(&(ex)) #define SET_PERSONALITY(ex) elf_set_personality(&(ex))
......
...@@ -33,6 +33,10 @@ typedef struct { ...@@ -33,6 +33,10 @@ typedef struct {
*/ */
typedef struct { typedef struct {
unsigned long end_brk; unsigned long end_brk;
#ifdef CONFIG_BINFMT_ELF_FDPIC
unsigned long exec_fdpic_loadmap;
unsigned long interp_fdpic_loadmap;
#endif
} mm_context_t; } mm_context_t;
#endif #endif
......
...@@ -31,6 +31,10 @@ ...@@ -31,6 +31,10 @@
#define PTRACE_SETVFPREGS 28 #define PTRACE_SETVFPREGS 28
#define PTRACE_GETHBPREGS 29 #define PTRACE_GETHBPREGS 29
#define PTRACE_SETHBPREGS 30 #define PTRACE_SETHBPREGS 30
#define PTRACE_GETFDPIC 31
#define PTRACE_GETFDPIC_EXEC 0
#define PTRACE_GETFDPIC_INTERP 1
/* /*
* PSR bits * PSR bits
......
...@@ -35,7 +35,7 @@ config ARCH_BINFMT_ELF_STATE ...@@ -35,7 +35,7 @@ config ARCH_BINFMT_ELF_STATE
config BINFMT_ELF_FDPIC config BINFMT_ELF_FDPIC
bool "Kernel support for FDPIC ELF binaries" bool "Kernel support for FDPIC ELF binaries"
default y default y
depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) depends on ((ARM && !MMU) || FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
select ELFCORE select ELFCORE
help help
ELF FDPIC binaries are based on ELF, but allow the individual load ELF FDPIC binaries are based on ELF, but allow the individual load
......
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