mirror of
https://github.com/switchbrew/libnx.git
synced 2025-06-21 20:42:44 +02:00
3a5d0dae35
- Added separate relro "segment" (introduced by [17.0.0+]) - Reordered sections to better reflect official layout - Fixed handling of TLS segment alignment
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
#pragma once
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#include "types.h"
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#include "arm/tls.h"
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#include "kernel/thread.h"
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#define THREADVARS_MAGIC 0x21545624 // !TV$
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// This structure is exactly 0x20 bytes
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typedef struct {
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// Magic value used to check if the struct is initialized
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u32 magic;
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// Thread handle, for mutexes
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Handle handle;
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// Pointer to the current thread (if exists)
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Thread* thread_ptr;
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// Pointer to this thread's newlib state
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struct _reent* reent;
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// Pointer to this thread's thread-local segment
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void* tls_tp; // !! Offset needs to be TLS+0x1F8 for __aarch64_read_tp !!
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} ThreadVars;
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extern const u8 __tdata_lma[];
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extern const u8 __tdata_lma_end[];
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extern u8 __tls_start[];
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extern u8 __tls_end[];
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extern size_t __tls_align;
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static inline ThreadVars* getThreadVars(void) {
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return (ThreadVars*)((u8*)armGetTls() + 0x200 - sizeof(ThreadVars));
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}
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NX_INLINE size_t getTlsStartOffset(void)
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{
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// TLS region begins with the Thread Control Block (TCB), which is intended
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// to contain two pointers. The actual tdata/tbss segment follows the TCB,
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// however if it requires special alignment the offset is rounded up.
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size_t tcb_sz = 2*sizeof(void*);
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return __tls_align > tcb_sz ? __tls_align : tcb_sz;
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}
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