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xtensa: enable CORE_DUMP_USE_REGSET

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Drop xtensa_elf_core_copy_regs function, ELF_CORE_COPY_REGS macro, and
dump_fpu function. Define CORE_DUMP_USE_REGSET to make ELF core dumper
use regset interface.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2018-11-20 20:09:58 -08:00
parent 1819afcc0b
commit 921534473a
2 changed files with 1 additions and 51 deletions
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6
arch/xtensa/include/asm/elf.h
View File

@ -86,11 +86,6 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef unsigned int elf_fpreg_t;
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
#define ELF_CORE_COPY_REGS(_eregs, _pregs) \
xtensa_elf_core_copy_regs ((xtensa_gregset_t*)&(_eregs), _pregs);
extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *);
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
@ -114,6 +109,7 @@ extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *);
#define ELF_ARCH EM_XTENSA
#define ELF_EXEC_PAGESIZE PAGE_SIZE
#define CORE_DUMP_USE_REGSET
/*
* This is the location that an ET_DYN program is loaded if exec'ed. Typical

46
arch/xtensa/kernel/process.c
View File

@ -326,49 +326,3 @@ unsigned long get_wchan(struct task_struct *p)
} while (count++ < 16);
return 0;
}
/*
* xtensa_gregset_t and 'struct pt_regs' are vastly different formats
* of processor registers. Besides different ordering,
* xtensa_gregset_t contains non-live register information that
* 'struct pt_regs' does not. Exception handling (primarily) uses
* 'struct pt_regs'. Core files and ptrace use xtensa_gregset_t.
*
*/
void xtensa_elf_core_copy_regs (xtensa_gregset_t *elfregs, struct pt_regs *regs)
{
unsigned long wb, ws, wm;
int live, last;
wb = regs->windowbase;
ws = regs->windowstart;
wm = regs->wmask;
ws = ((ws >> wb) | (ws << (WSBITS - wb))) & ((1 << WSBITS) - 1);
/* Don't leak any random bits. */
memset(elfregs, 0, sizeof(*elfregs));
/* Note: PS.EXCM is not set while user task is running; its
* being set in regs->ps is for exception handling convenience.
*/
elfregs->pc = regs->pc;
elfregs->ps = (regs->ps & ~(1 << PS_EXCM_BIT));
elfregs->lbeg = regs->lbeg;
elfregs->lend = regs->lend;
elfregs->lcount = regs->lcount;
elfregs->sar = regs->sar;
elfregs->windowstart = ws;
live = (wm & 2) ? 4 : (wm & 4) ? 8 : (wm & 8) ? 12 : 16;
last = XCHAL_NUM_AREGS - (wm >> 4) * 4;
memcpy(elfregs->a, regs->areg, live * 4);
memcpy(elfregs->a + last, regs->areg + last, (wm >> 4) * 16);
}
int dump_fpu(void)
{
return 0;
}