diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2022-06-03 21:31:14 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-09-14 04:28:00 +0300 |
| commit | e3ddb8bbe0f8cc994748c81e17acc58fda6f8abe (patch) | |
| tree | c4a5c648f6622b6c655b3cbd02d7575e30898b58 /arch/xtensa/include/asm/elf.h | |
| parent | ccd2d9df6e21581dfed3e6dffb3b6f1b7efd1a26 (diff) | |
| download | linux-e3ddb8bbe0f8cc994748c81e17acc58fda6f8abe.tar.xz | |
xtensa: add FDPIC and static PIE support for noMMU
Define ELFOSABI_XTENSA_FDPIC and use it as an OSABI tag in the ELF
header to distinguish FDPIC ELF files from regular ELF files.
Define ELF_FDPIC_PLAT_INIT and put executable map, interpreter map and
executable dynamic section addresses into registers a4..a6.
Update start_thread macro to preserve register values in the current
register window.
Add definitions for PTRACE_GETFDPIC, PTRACE_GETFDPIC_EXEC and
PTRACE_GETFDPIC_INTERP.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/include/asm/elf.h')
| -rw-r--r-- | arch/xtensa/include/asm/elf.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h index 9c21897c6992..ffcf1ada19c6 100644 --- a/arch/xtensa/include/asm/elf.h +++ b/arch/xtensa/include/asm/elf.h @@ -93,6 +93,10 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; #define elf_check_arch(x) ( ( (x)->e_machine == EM_XTENSA ) || \ ( (x)->e_machine == EM_XTENSA_OLD ) ) +#define ELFOSABI_XTENSA_FDPIC 65 +#define elf_check_fdpic(x) ((x)->e_ident[EI_OSABI] == ELFOSABI_XTENSA_FDPIC) +#define ELF_FDPIC_CORE_EFLAGS 0 + /* * These are used to set parameters in the core dumps. */ @@ -164,6 +168,13 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; (_r)->areg[14] = 0; (_r)->areg[15] = 0; \ } while (0) +#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \ + do { \ + (_r)->areg[4] = _exec_map_addr; \ + (_r)->areg[5] = _interp_map_addr; \ + (_r)->areg[6] = dynamic_addr; \ + } while (0) + typedef struct { xtregs_opt_t opt; xtregs_user_t user; |