diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2007-06-13 00:00:00 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@schwinge.name> | 2011-10-20 12:50:53 +0200 |
| commit | e24c161e9d16483a1d97402557f7756e26afb6cf (patch) | |
| tree | f261f3fbfc270d41067be44472b4af13f3adda71 /libthreads/i386 | |
| parent | 2a7fb4a54c2ac9cb8396da117f0a05055330599c (diff) | |
TLS support for libthreads.
* libthreads/cprocs.c (cproc_create): Call into glibc to allocate static TLS
block.
* libthreads/cthread_internals.h (tcbhead_t): New structure; as in glibc.
(cproc_setup): Take TCB parameter.
(_dl_allocate_tls): Declare; from glibc.
* libthreads/alpha/thread.c (cproc_setup): Compile-time warning for missing TLS
support.
* libthreads/i386/thread.c (cproc_setup): Imlement TLS support.
Diffstat (limited to 'libthreads/i386')
| -rw-r--r-- | libthreads/i386/thread.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/libthreads/i386/thread.c b/libthreads/i386/thread.c index c0195a8b..00537be5 100644 --- a/libthreads/i386/thread.c +++ b/libthreads/i386/thread.c @@ -61,6 +61,21 @@ char rcs_id[] = "$Header: cvs-sans-libpthread/hurd/libthreads/i386/thread.c,v 1. #include <cthreads.h> #include "cthread_internals.h" #include <mach.h> +#include <mach/i386/mach_i386.h> +#include <mach/mig_errors.h> + +#define HURD_TLS_DESC_DECL(desc, tcb) \ + struct descriptor desc = \ + { /* low word: */ \ + 0xffff /* limit 0..15 */ \ + | (((unsigned int) (tcb)) << 16) /* base 0..15 */ \ + , /* high word: */ \ + ((((unsigned int) (tcb)) >> 16) & 0xff) /* base 16..23 */ \ + | ((0x12 | 0x60 | 0x80) << 8) /* access = ACC_DATA_W|ACC_PL_U|ACC_P */ \ + | (0xf << 16) /* limit 16..19 */ \ + | ((4 | 8) << 20) /* granularity = SZ_32|SZ_G */ \ + | (((unsigned int) (tcb)) & 0xff000000) /* base 24..31 */ \ + } /* * Set up the initial state of a MACH thread @@ -68,7 +83,7 @@ char rcs_id[] = "$Header: cvs-sans-libpthread/hurd/libthreads/i386/thread.c,v 1. * when it is resumed. */ void -cproc_setup(register cproc_t child, thread_t thread, void (*routine)(cproc_t)) +cproc_setup(register cproc_t child, thread_t thread, tcbhead_t *tcb, void (*routine)(cproc_t)) { extern unsigned int __hurd_threadvar_max; /* GNU */ register int *top = (int *) @@ -81,13 +96,15 @@ cproc_setup(register cproc_t child, thread_t thread, void (*routine)(cproc_t)) register struct i386_thread_state *ts = &state; kern_return_t r; unsigned int count; + HURD_TLS_DESC_DECL(desc, tcb); + int sel; /* * Set up i386 call frame and registers. * Read registers first to get correct segment values. */ count = i386_THREAD_STATE_COUNT; - MACH_CALL(thread_get_state(thread,i386_THREAD_STATE,(thread_state_t) &state,&count),r); + MACH_CALL(thread_get_state(thread,i386_REGS_SEGS_STATE,(thread_state_t) &state,&count),r); ts->eip = (int) routine; *--top = (int) child; /* argument to function */ @@ -95,7 +112,16 @@ cproc_setup(register cproc_t child, thread_t thread, void (*routine)(cproc_t)) ts->uesp = (int) top; /* set stack pointer */ ts->ebp = 0; /* clear frame pointer */ - MACH_CALL(thread_set_state(thread,i386_THREAD_STATE,(thread_state_t) &state,i386_THREAD_STATE_COUNT),r); + asm ("mov %%gs, %w0" : "=q" (sel) : "0" (0)); + tcb->tcb = tcb; + tcb->self = thread; + if (__builtin_expect (sel, 0x48) & 4) /* LDT selector */ + __i386_set_ldt (thread, sel, &desc, 1); + else + __i386_set_gdt (thread, &sel, desc); + ts->gs = sel; + + MACH_CALL(thread_set_state(thread,i386_REGS_SEGS_STATE,(thread_state_t) &state,i386_THREAD_STATE_COUNT),r); } #if defined(cthread_sp) |