diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-01-25 10:54:11 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2018-03-16 09:40:34 -0700 |
| commit | ba7651fba54199e5dedbbd08157687291b9dbae3 (patch) | |
| tree | f03b970e3cfdfde9040ff14c59dc0bf3acfb6fe3 /linux-user/elfload.c | |
| parent | bf9c3a5a96dfabcdcb7964110866bb9bc06a43c1 (diff) | |
target/xtensa: add linux-user support
Import list of syscalls from the kernel source. Conditionalize code/data
that is only used with softmmu. Implement exception handlers. Implement
signal hander (only the core registers for now, no coprocessors or TIE).
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'linux-user/elfload.c')
| -rw-r--r-- | linux-user/elfload.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 5fc130cc20..fe7a5bc566 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1341,6 +1341,64 @@ static inline void init_thread(struct target_pt_regs *regs, #endif /* TARGET_HPPA */ +#ifdef TARGET_XTENSA + +#define ELF_START_MMAP 0x20000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_XTENSA + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->windowbase = 0; + regs->windowstart = 1; + regs->areg[1] = infop->start_stack; + regs->pc = infop->entry; +} + +/* See linux kernel: arch/xtensa/include/asm/elf.h. */ +#define ELF_NREG 128 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +enum { + TARGET_REG_PC, + TARGET_REG_PS, + TARGET_REG_LBEG, + TARGET_REG_LEND, + TARGET_REG_LCOUNT, + TARGET_REG_SAR, + TARGET_REG_WINDOWSTART, + TARGET_REG_WINDOWBASE, + TARGET_REG_THREADPTR, + TARGET_REG_AR0 = 64, +}; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUXtensaState *env) +{ + unsigned i; + + (*regs)[TARGET_REG_PC] = tswapreg(env->pc); + (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM); + (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]); + (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]); + (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]); + (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]); + (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]); + (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]); + (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]); + xtensa_sync_phys_from_window((CPUXtensaState *)env); + for (i = 0; i < env->config->nareg; ++i) { + (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]); + } +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_XTENSA */ + #ifndef ELF_PLATFORM #define ELF_PLATFORM (NULL) #endif |