mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-03-31 14:01:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

powerpc: Make PT_THREAD_POINTER available to assembly code

Browse Source 
PT_THREAD_POINTER is currenty defined inside a #ifndef __ASSEMBLER__ block, but
its usage should not be limited to C code, as it can be useful when accessing
the TLS from assembly code as well.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
Matheus Castanho 2020-10-19 11:06:56 -03:00
parent 29fddfc7df
commit 1e0a7fd099
1 changed files with 16 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
sysdeps/powerpc/nptl/tls.h
View File

@ -29,8 +29,24 @@
#else /* __ASSEMBLER__ */
# include <tcb-offsets.h>
# define __ASSEMBLY__
# include <asm/ptrace.h>
#endif /* __ASSEMBLER__ */
#ifndef __powerpc64__
/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
# define PT_THREAD_POINTER PT_R2
# ifndef __ASSEMBLER__
register void *__thread_register __asm__ ("r2");
# endif
#else /* __powerpc64__ */
/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
# define PT_THREAD_POINTER PT_R13
# ifndef __ASSEMBLER__
register void *__thread_register __asm__ ("r13");
# endif
#endif /* __powerpc64__ */
#ifndef __ASSEMBLER__
@ -106,16 +122,6 @@ typedef struct
(sizeof (struct pthread) \
+ ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
# ifndef __powerpc64__
/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
register void *__thread_register __asm__ ("r2");
# define PT_THREAD_POINTER PT_R2
# else
/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
register void *__thread_register __asm__ ("r13");
# define PT_THREAD_POINTER PT_R13
# endif
/* The following assumes that TP (R2 or R13) points to the end of the
TCB + 0x7000 (per the ABI). This implies that TCB address is
TP - 0x7000. As we define TLS_DTV_AT_TP we can