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x86/coredump: Use pr_reg size, rather that TIF_IA32 flag 

Killed PR_REG_SIZE and PR_REG_PTR macro as we can get regset size
from regset view.
I wish I could also kill PRSTATUS_SIZE nicely.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: 0x7f454c46@gmail.com
Cc: linux-mm@kvack.org
Cc: luto@kernel.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-5-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Dmitry Safonov 2016-09-05 16:33:06 +03:00 committed by Thomas Gleixner
parent 2eefd87896
commit 90954e7b94
2 changed files with 12 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/include/asm/compat.h
View File

@ -275,10 +275,10 @@ struct compat_shmid64_ds {
#ifdef CONFIG_X86_X32_ABI
typedef struct user_regs_struct compat_elf_gregset_t;
#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
#define SET_PR_FPVALID(S,V) \
do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
/* Full regset -- prstatus on x32, otherwise on ia32 */
#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
#define SET_PR_FPVALID(S, V, R) \
do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
while (0)
#define COMPAT_USE_64BIT_TIME \

23
fs/binfmt_elf.c
View File

@ -1624,20 +1624,12 @@ static void do_thread_regset_writeback(struct task_struct *task,
regset->writeback(task, regset, 1);
}
#ifndef PR_REG_SIZE
#define PR_REG_SIZE(S) sizeof(S)
#endif
#ifndef PRSTATUS_SIZE
#define PRSTATUS_SIZE(S) sizeof(S)
#endif
#ifndef PR_REG_PTR
#define PR_REG_PTR(S) (&((S)->pr_reg))
#define PRSTATUS_SIZE(S, R) sizeof(S)
#endif
#ifndef SET_PR_FPVALID
#define SET_PR_FPVALID(S, V) ((S)->pr_fpvalid = (V))
#define SET_PR_FPVALID(S, V, R) ((S)->pr_fpvalid = (V))
#endif
static int fill_thread_core_info(struct elf_thread_core_info *t,
@ -1645,6 +1637,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
long signr, size_t *total)
{
unsigned int i;
unsigned int regset_size = view->regsets[0].n * view->regsets[0].size;
/*
* NT_PRSTATUS is the one special case, because the regset data
@ -1653,12 +1646,11 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
* We assume that regset 0 is NT_PRSTATUS.
*/
fill_prstatus(&t->prstatus, t->task, signr);
(void) view->regsets[0].get(t->task, &view->regsets[0],
0, PR_REG_SIZE(t->prstatus.pr_reg),
PR_REG_PTR(&t->prstatus), NULL);
(void) view->regsets[0].get(t->task, &view->regsets[0], 0, regset_size,
&t->prstatus.pr_reg, NULL);
fill_note(&t->notes[0], "CORE", NT_PRSTATUS,
PRSTATUS_SIZE(t->prstatus), &t->prstatus);
PRSTATUS_SIZE(t->prstatus, regset_size), &t->prstatus);
*total += notesize(&t->notes[0]);
do_thread_regset_writeback(t->task, &view->regsets[0]);
@ -1688,7 +1680,8 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
regset->core_note_type,
size, data);
else {
SET_PR_FPVALID(&t->prstatus, 1);
SET_PR_FPVALID(&t->prstatus,
1, regset_size);
fill_note(&t->notes[i], "CORE",
NT_PRFPREG, size, data);
}