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Implement target_thread_init()

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This commit is contained in:
Gleb Popov 2021-08-31 18:32:05 +03:00
parent 9525353a2d
commit 8d0de0a9eb
1 changed files with 35 additions and 1 deletions
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36
bsd-user/e2k/target_arch_thread.h
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@ -35,10 +35,44 @@ static inline void target_thread_set_upcall(CPUE2KState *regs, abi_ulong entry,
assert(0 && "target_thread_set_upcall is not implemented yet");
}
static abi_ulong e2k_mmap(abi_ulong size)
{
abi_ulong addr;
abi_ulong guard = TARGET_PAGE_SIZE;
if (size < TARGET_PAGE_SIZE) {
size = TARGET_PAGE_SIZE;
}
if (guard < qemu_real_host_page_size) {
guard = qemu_real_host_page_size;
}
addr = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (addr == -1) {
perror("mmap e2k stack");
exit(-1);
}
target_mprotect(addr + size, guard, PROT_NONE);
return addr;
}
// compare to linux-user/elfload.c:init_thread for e2k
static inline void target_thread_init(struct target_pt_regs *regs,
struct image_info *infop)
{
assert(0 && "target_thread_init is not implemented yet");
abi_ulong start_stack = infop->start_stack & ~0xf;
regs->ip = infop->entry;
// FIXME: set real start stack address
regs->sbr = infop->arg_strings & ~0xf;
regs->usd_lo = (0x1800UL << 48) | start_stack;
regs->usd_hi = (regs->sbr - start_stack) << 32;
e2k_psp_new(&regs->pcsp, E2K_DEFAULT_PCS_SIZE, false);
e2k_psp_new(&regs->psp, E2K_DEFAULT_PS_SIZE, true);
}
#endif /* !_TARGET_ARCH_THREAD_H_ */