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73 lines
1.5 KiB
73 lines
1.5 KiB
#pragma once
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#include "gp/containers/buffer.hpp"
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#include <cstdint>
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#define no_inline_decl(a) __attribute__((noinline)) a
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namespace gp{
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namespace system {
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namespace specifics {
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struct platform_data {
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platform_data() = default;
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platform_data(gp::buffer<char> stack_str)
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: stack_ptr((stack_str.end()-16).data)
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, base_ptr(stack_ptr)
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{}
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uint64_t rbx, r12, r13, r14, r15;
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void* stack_ptr;
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void* base_ptr;
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void pull() __attribute__((always_inline))
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{
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__asm__ __volatile__(
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"movq %%rsp, %0\n"
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"movq %%rbp, %1\n"
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"movq %%rbx, %2\n"
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"movq %%r12, %3\n"
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"movq %%r13, %4\n"
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"movq %%r14, %5\n"
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"movq %%r15, %6\n"
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: "=m"(stack_ptr)
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, "=m"(base_ptr)
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, "=m"(rbx)
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, "=m"(r12)
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, "=m"(r13)
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, "=m"(r14)
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, "=m"(r15)
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);
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}
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void* push(void* location) __attribute__((always_inline))
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{
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volatile void* volatile tmp = static_cast<char*>(stack_ptr) - sizeof(void*);
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*static_cast<volatile void* volatile * volatile>(tmp) = location;
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__asm__ __volatile__(
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"movq %1, %%rsp\n"
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"movq %2, %%rbp\n"
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"movq %3, %%rbx\n"
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"movq %4, %%r12\n"
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"movq %5, %%r13\n"
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"movq %6, %%r14\n"
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"movq %7, %%r15\n"
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"popq %0\n"
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: "+r"(location)
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: "m"(tmp)
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, "m"(base_ptr)
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, "m"(rbx)
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, "m"(r12)
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, "m"(r13)
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, "m"(r14)
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, "m"(r15)
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: "memory"
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);
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return location;
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}
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};
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}
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}
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}
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