3595c3a440
Pull syscall code out of libc and create new libj6. This should eventually become a vDSO, but for now it can still be a static lib. Also renames all the _syscall_* symbol names to j6_*
40 lines
828 B
C
40 lines
828 B
C
#include <stdint.h>
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#include <j6/errors.h>
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#include <j6/syscalls.h>
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//void *sbrk(intptr_t) __attribute__ ((weak));
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static j6_handle_t __core_handle = 0;
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static intptr_t __core_size = 0;
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static const uintptr_t __core_base = 0x1c0000000;
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static const void *error_val = (void*)-1;
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void *sbrk(intptr_t i)
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{
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if (i == 0)
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return (void*)__core_base;
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if (__core_size == 0) {
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if (i < 0)
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return (void*)-1;
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j6_status_t result = j6_vma_create_map(&__core_handle, i, __core_base, 1);
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if (result != j6_status_ok)
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return (void*)-1;
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__core_size = i;
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return (void*)__core_base;
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}
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size_t new_size = __core_size + i;
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j6_status_t result = j6_vma_resize(__core_handle, &new_size);
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if (result != j6_status_ok)
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return (void*)-1;
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uintptr_t prev = __core_base + __core_size;
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__core_size += i;
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return (void*)prev;
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}
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