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nptl: Increase default TCB alignment to 32

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rseq support will use a 32-byte aligned field in struct pthread,
so the whole struct needs to have at least that alignment.

nptl/tst-tls3mod.c uses TCB_ALIGNMENT, therefore include <descr.h>
to obtain the fallback definition.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Florian Weimer 2021-12-03 16:28:07 +01:00
parent 0656b649c5
commit 23c77f6018
18 changed files with 4 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
nptl/descr.h
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@ -36,7 +36,9 @@
#include <tls-internal-struct.h>
#ifndef TCB_ALIGNMENT
# define TCB_ALIGNMENT sizeof (double)
# define TCB_ALIGNMENT 32
#elif TCB_ALIGNMENT < 32
# error TCB_ALIGNMENT must be at least 32
#endif

1
nptl/tst-tls3mod.c
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@ -23,6 +23,7 @@
#include <stdlib.h>
#include <unistd.h>
#include <pthreaddef.h>
#include <descr.h>
extern pthread_barrier_t b;

3
sysdeps/aarch64/nptl/pthreaddef.h
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@ -28,8 +28,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/alpha/nptl/pthreaddef.h
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@ -27,8 +27,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 4096
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/arc/nptl/pthreaddef.h
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@ -28,8 +28,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 4
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/arm/nptl/pthreaddef.h
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@ -28,9 +28,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame.

3
sysdeps/csky/nptl/pthreaddef.h
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@ -28,8 +28,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 8
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/ia64/nptl/pthreaddef.h
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@ -30,9 +30,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 16384
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __stack_pointer

3
sysdeps/m68k/nptl/pthreaddef.h
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@ -27,9 +27,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/microblaze/nptl/pthreaddef.h
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@ -31,8 +31,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/mips/nptl/pthreaddef.h
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@ -27,9 +27,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/nios2/nptl/pthreaddef.h
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@ -28,8 +28,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 4
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/powerpc/nptl/pthreaddef.h
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@ -28,9 +28,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 4096
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/riscv/nptl/pthreaddef.h
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@ -28,8 +28,5 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/s390/nptl/pthreaddef.h
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@ -28,9 +28,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/sh/nptl/pthreaddef.h
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@ -29,9 +29,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 8
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

3
sysdeps/sparc/sparc32/pthreaddef.h
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@ -27,9 +27,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 2048
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME (stack_pointer + (2 * 64))

4
sysdeps/sparc/sparc64/pthreaddef.h
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@ -27,10 +27,6 @@
/* Minimal stack size after allocating thread descriptor and guard size. */
#define MINIMAL_REST_STACK 4096
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME (stack_pointer + (2 * 128))
register char *stack_pointer __asm__("%sp");