Follow arm64, riscv, and x86 and change extable layout to common "relative table with data". This allows to get rid of s390 specific code in sorttable.c. The main difference to before is that extable entries do not contain a relative function pointer anymore. Instead data and type fields are added. The type field is used to indicate which exception handler needs to be called, while the data field is currently unused.
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| @@ -261,45 +261,6 @@ static void sort_relative_table_with_data(char *extab_image, int image_size) · 260 unmodified lines | |||
| 261 | } | 261 | } |
| 262 | } | 262 | } |
| 263 | 263 | ||
| 264 | static void s390_sort_relative_table(char *extab_image, int image_size) | ||
| 265 | { | ||
| 266 | int i; | ||
| 267 | |||
| 268 | for (i = 0; i < image_size; i += 16) { | ||
| 269 | char *loc = extab_image + i; | ||
| 270 | uint64_t handler; | ||
| 271 | |||
| 272 | w(r((uint32_t *)loc) + i, (uint32_t *)loc); | ||
| 273 | w(r((uint32_t *)(loc + 4)) + (i + 4), (uint32_t *)(loc + 4)); | ||
| 274 | /* | ||
| 275 | * 0 is a special self-relative handler value, which means that | ||
| 276 | * handler should be ignored. It is safe, because it means that | ||
| 277 | * handler field points to itself, which should never happen. | ||
| 278 | * When creating extable-relative values, keep it as 0, since | ||
| 279 | * this should never occur either: it would mean that handler | ||
| 280 | * field points to the first extable entry. | ||
| 281 | */ | ||
| 282 | handler = r8((uint64_t *)(loc + 8)); | ||
| 283 | if (handler) | ||
| 284 | handler += i + 8; | ||
| 285 | w8(handler, (uint64_t *)(loc + 8)); | ||
| 286 | } | ||
| 287 | |||
| 288 | qsort(extab_image, image_size / 16, 16, compare_relative_table); | ||
| 289 | |||
| 290 | for (i = 0; i < image_size; i += 16) { | ||
| 291 | char *loc = extab_image + i; | ||
| 292 | uint64_t handler; | ||
| 293 | |||
| 294 | w(r((uint32_t *)loc) - i, (uint32_t *)loc); | ||
| 295 | w(r((uint32_t *)(loc + 4)) - (i + 4), (uint32_t *)(loc + 4)); | ||
| 296 | handler = r8((uint64_t *)(loc + 8)); | ||
| 297 | if (handler) | ||
| 298 | handler -= i + 8; | ||
| 299 | w8(handler, (uint64_t *)(loc + 8)); | ||
| 300 | } | ||
| 301 | } | ||
| 302 | |||
| 303 | static int do_file(char const *const fname, void *addr) | 264 | static int do_file(char const *const fname, void *addr) |
| 304 | { | 265 | { |
| 305 | int rc = -1; | 266 | int rc = -1; |
| @@ -340,12 +301,10 @@ static int do_file(char const *const fname, void *addr) · 34 unmodified lines | |||
| 340 | case EM_386: | 301 | case EM_386: |
| 341 | case EM_AARCH64: | 302 | case EM_AARCH64: |
| 342 | case EM_RISCV: | 303 | case EM_RISCV: |
| 304 | case EM_S390: | ||
| 343 | case EM_X86_64: | 305 | case EM_X86_64: |
| 344 | custom_sort = sort_relative_table_with_data; | 306 | custom_sort = sort_relative_table_with_data; |
| 345 | break; | 307 | break; |
| 346 | case EM_S390: | ||
| 347 | custom_sort = s390_sort_relative_table; | ||
| 348 | break; | ||
| 349 | case EM_PARISC: | 308 | case EM_PARISC: |
| 350 | case EM_PPC: | 309 | case EM_PPC: |
| 351 | case EM_PPC64: | 310 | case EM_PPC64: |