diff options
Diffstat (limited to 'linuxthreads/sysdeps/powerpc/tls.h')
| -rw-r--r-- | linuxthreads/sysdeps/powerpc/tls.h | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/linuxthreads/sysdeps/powerpc/tls.h b/linuxthreads/sysdeps/powerpc/tls.h index d946d06fae..55e915e440 100644 --- a/linuxthreads/sysdeps/powerpc/tls.h +++ b/linuxthreads/sysdeps/powerpc/tls.h @@ -32,8 +32,6 @@ typedef union dtv void *pointer; } dtv_t; -#else /* __ASSEMBLER__ */ -# include <tcb-offsets.h> #endif /* __ASSEMBLER__ */ #ifdef HAVE_TLS_SUPPORT @@ -52,27 +50,29 @@ typedef struct } tcbhead_t; /* This is the size of the initial TCB. */ -# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) +# define TLS_INIT_TCB_SIZE 0 /* Alignment requirements for the initial TCB. */ -# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) +# define TLS_INIT_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) /* This is the size of the TCB. */ -# define TLS_TCB_SIZE sizeof (tcbhead_t) +# define TLS_TCB_SIZE 0 /* Alignment requirements for the TCB. */ -# define TLS_TCB_ALIGN __alignof__ (tcbhead_t) +# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) /* This is the size we need before TCB. */ -# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct) +# define TLS_PRE_TCB_SIZE \ + (sizeof (struct _pthread_descr_struct) \ + + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1))) /* The following assumes that TP (R2 or R13) is points to the end of the TCB + 0x7000 (per the ABI). This implies that TCB address is - TP-(TLS_TCB_SIZE + 0x7000). As we define TLS_DTV_AT_TP we can + TP - 0x7000. As we define TLS_DTV_AT_TP we can assume that the pthread_descr is allocated immediately ahead of the TCB. This implies that the pthread_descr address is - TP-(TLS_PRE_TCB_SIZE + TLS_TCB_SIZE + 0x7000). */ -# define TLS_TCB_OFFSET 0x7000 + TP - (TLS_PRE_TCB_SIZE + 0x7000). */ +#define TLS_TCB_OFFSET 0x7000 /* The DTV is allocated at the TP; the TCB is placed elsewhere. */ /* This is not really true for powerpc64. We are following alpha @@ -82,13 +82,13 @@ typedef struct /* Install the dtv pointer. The pointer passed is to the element with index -1 which contain the length. */ # define INSTALL_DTV(TCBP, DTVP) \ - (((tcbhead_t *) (TCBP))->dtv = (DTVP) + 1) + (((tcbhead_t *) (TCBP))[-1].dtv = (DTVP) + 1) /* Install new dtv for current thread. */ # define INSTALL_NEW_DTV(DTV) (THREAD_DTV() = (DTV)) /* Return dtv of given thread descriptor. */ -# define GET_DTV(TCBP) (((tcbhead_t *) (TCBP))->dtv) +# define GET_DTV(TCBP) (((tcbhead_t *) (TCBP))[-1].dtv) /* The global register variable is declared in pt-machine.h with the wrong type, but the compiler doesn't like us declaring another. */ @@ -98,22 +98,22 @@ typedef struct special attention since 'errno' is not yet available and if the operation can cause a failure 'errno' must not be touched. */ # define TLS_INIT_TP(TCBP, SECONDCALL) \ - (__thread_register = (void *) (TCBP) + TLS_TCB_OFFSET + TLS_TCB_SIZE, NULL) + (__thread_register = (void *) (TCBP) + TLS_TCB_OFFSET, NULL) /* Return the address of the dtv for the current thread. */ # define THREAD_DTV() \ - (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET - TLS_TCB_SIZE))->dtv) + (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET))[-1].dtv) /* Return the thread descriptor for the current thread. */ # undef THREAD_SELF # define THREAD_SELF \ ((pthread_descr) (__thread_register \ - - TLS_TCB_OFFSET - TLS_TCB_SIZE - TLS_PRE_TCB_SIZE)) + - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)) # undef INIT_THREAD_SELF # define INIT_THREAD_SELF(DESCR, NR) \ (__thread_register = ((void *) (DESCR) \ - + TLS_TCB_OFFSET + TLS_TCB_SIZE + TLS_PRE_TCB_SIZE)) + + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)) /* Make sure we have the p_multiple_threads member in the thread structure. See below. */ @@ -124,6 +124,10 @@ typedef struct /* Get the thread descriptor definition. */ # include <linuxthreads/descr.h> +/* l_tls_offset == 0 is perfectly valid on PPC, so we have to use some + different value to mean unset l_tls_offset. */ +# define NO_TLS_OFFSET -1 + # endif /* __ASSEMBLER__ */ #elif !defined __ASSEMBLER__ && !defined __powerpc64__ |