diff options
| author |   Max Filippov <jcmvbkbc@gmail.com> | 2022-06-03 11:31:14 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-09-13 18:28:00 -0700 |
| commit | e3ddb8bbe0f8cc994748c81e17acc58fda6f8abe (patch) | |
| tree | c4a5c648f6622b6c655b3cbd02d7575e30898b58 /arch/xtensa/include/asm/processor.h | |
| parent | xtensa: clean up ELF_PLAT_INIT macro (diff) | |
| download | linux-dev-e3ddb8bbe0f8cc994748c81e17acc58fda6f8abe.tar.xz linux-dev-e3ddb8bbe0f8cc994748c81e17acc58fda6f8abe.zip | |
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/processor.h')
| -rw-r--r-- | arch/xtensa/include/asm/processor.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 76bc63127c66..b75ba16ec080 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -205,9 +205,12 @@ struct thread_struct { #define start_thread(regs, new_pc, new_sp) \ do { \ unsigned long syscall = (regs)->syscall; \ + unsigned long current_aregs[16]; \ + memcpy(current_aregs, (regs)->areg, sizeof(current_aregs)); \ memset((regs), 0, sizeof(*(regs))); \ (regs)->pc = (new_pc); \ (regs)->ps = USER_PS_VALUE; \ + memcpy((regs)->areg, current_aregs, sizeof(current_aregs)); \ (regs)->areg[1] = (new_sp); \ (regs)->areg[0] = 0; \ (regs)->wmask = 1; \ |