fa587060f1
Pull out the old linked list of args structures in favor of doing things the SysV ABI-specified way.
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
// The kernel depends on libj6 for some shared code,
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// but should not include the user-specific code.
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#include "j6/init.h"
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#include "j6/types.h"
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#ifndef __j6kernel
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#include <stddef.h>
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#include <stdint.h>
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#include <j6/errors.h>
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#include <j6/init.h>
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#include <j6/syscalls.h>
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#include <j6/types.h>
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namespace {
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char const * const *envp = nullptr;
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const j6_aux *aux = nullptr;
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const j6_aux * find_aux(uint64_t type) {
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if (!aux) return nullptr;
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for (j6_aux const *p = aux; p->type; ++p)
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if (p->type == type) return p;
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return nullptr;
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}
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} // namespace
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j6_handle_t
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j6_find_init_handle(uint64_t proto)
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{
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const j6_aux *aux_handles = find_aux(j6_aux_handles);
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if (!aux_handles)
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return j6_handle_invalid;
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const j6_arg_handles *arg = reinterpret_cast<const j6_arg_handles*>(aux_handles->pointer);
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for (unsigned i = 0; i < arg->nhandles; ++i) {
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const j6_arg_handle_entry &ent = arg->handles[i];
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if (ent.proto == proto)
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return ent.handle;
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}
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return j6_handle_invalid;
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}
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extern "C" void API
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__init_libj6(const uint64_t *stack)
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{
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// Walk the stack to get the aux vector
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uint64_t argc = *stack++;
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stack += argc + 1; // Skip argv's and sentinel
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envp = reinterpret_cast<char const * const *>(stack);
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while (*stack++); // Skip envp's and sentinel
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aux = reinterpret_cast<const j6_aux*>(stack);
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}
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#endif // __j6kernel
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