arch/powerpc/platforms/cell/spufs/coredump.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/cell/spufs/coredump.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/cell/spufs/coredump.c
Extension
.c
Size
3822 bytes
Lines
184
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (rc) {
			put_spu_context(ctx);
			break;
		}

		rc = spufs_ctx_note_size(ctx, fd);
		spu_release_saved(ctx);
		if (rc < 0) {
			put_spu_context(ctx);
			break;
		}

		size += rc;

		/* start searching the next fd next time */
		fd++;
		put_spu_context(ctx);
	}

	return size;
}

static int spufs_arch_write_note(struct spu_context *ctx, int i,
				  struct coredump_params *cprm, int dfd)
{
	size_t sz = spufs_coredump_read[i].size;
	char fullname[80];
	struct elf_note en;
	int ret;

	sprintf(fullname, "SPU/%d/%s", dfd, spufs_coredump_read[i].name);
	en.n_namesz = strlen(fullname) + 1;
	en.n_descsz = sz;
	en.n_type = NT_SPU;

	if (!dump_emit(cprm, &en, sizeof(en)))
		return -EIO;
	if (!dump_emit(cprm, fullname, en.n_namesz))
		return -EIO;
	if (!dump_align(cprm, 4))
		return -EIO;

	if (spufs_coredump_read[i].dump) {
		ret = spufs_coredump_read[i].dump(ctx, cprm);
		if (ret < 0)
			return ret;
	} else {
		char buf[32];

		ret = snprintf(buf, sizeof(buf), "0x%.16llx",
			       spufs_coredump_read[i].get(ctx));
		if (ret >= sizeof(buf))
			return sizeof(buf);

		/* count trailing the NULL: */
		if (!dump_emit(cprm, buf, ret + 1))
			return -EIO;
	}

	dump_skip_to(cprm, roundup(cprm->pos - ret + sz, 4));
	return 0;
}

int spufs_coredump_extra_notes_write(struct coredump_params *cprm)
{
	struct spu_context *ctx;
	int fd, j, rc;

	fd = 0;
	while ((ctx = coredump_next_context(&fd)) != NULL) {
		rc = spu_acquire_saved(ctx);
		if (rc)
			return rc;

		for (j = 0; spufs_coredump_read[j].name != NULL; j++) {
			rc = spufs_arch_write_note(ctx, j, cprm, fd);
			if (rc) {
				spu_release_saved(ctx);
				return rc;
			}
		}

		spu_release_saved(ctx);

		/* start searching the next fd next time */
		fd++;
	}

	return 0;
}

Annotation

Implementation Notes