#include <libelf.h>
#include <stdio.h>
+static void parse_symbol_table(Elf_Data *symbol_table_data,
+ const GElf_Shdr *symbol_table_header,
+ struct radeon_shader_binary *binary)
+{
+ GElf_Sym symbol;
+ unsigned i = 0;
+ unsigned symbol_count =
+ symbol_table_header->sh_size / symbol_table_header->sh_entsize;
+
+ /* We are over allocating this list, because symbol_count gives the
+ * total number of symbols, and we will only be filling the list
+ * with offsets of global symbols. The memory savings from
+ * allocating the correct size of this list will be small, and
+ * I don't think it is worth the cost of pre-computing the number
+ * of global symbols.
+ */
+ binary->global_symbol_offsets = CALLOC(symbol_count, sizeof(uint64_t));
+
+ while (gelf_getsym(symbol_table_data, i++, &symbol)) {
+ unsigned i;
+ if (GELF_ST_BIND(symbol.st_info) != STB_GLOBAL ||
+ symbol.st_shndx == 0 /* Undefined symbol */) {
+ continue;
+ }
+
+ binary->global_symbol_offsets[binary->global_symbol_count] =
+ symbol.st_value;
+
+ /* Sort the list using bubble sort. This list will usually
+ * be small. */
+ for (i = binary->global_symbol_count; i > 0; --i) {
+ uint64_t lhs = binary->global_symbol_offsets[i - 1];
+ uint64_t rhs = binary->global_symbol_offsets[i];
+ if (lhs < rhs) {
+ break;
+ }
+ binary->global_symbol_offsets[i] = lhs;
+ binary->global_symbol_offsets[i - 1] = rhs;
+ }
+ ++binary->global_symbol_count;
+ }
+}
+
+static void parse_relocs(Elf *elf, Elf_Data *relocs, Elf_Data *symbols,
+ unsigned symbol_sh_link,
+ struct radeon_shader_binary *binary)
+{
+ unsigned i;
+
+ if (!relocs || !symbols || !binary->reloc_count) {
+ return;
+ }
+ binary->relocs = CALLOC(binary->reloc_count,
+ sizeof(struct radeon_shader_reloc));
+ for (i = 0; i < binary->reloc_count; i++) {
+ GElf_Sym symbol;
+ GElf_Rel rel;
+ char *symbol_name;
+ struct radeon_shader_reloc *reloc = &binary->relocs[i];
+
+ gelf_getrel(relocs, i, &rel);
+ gelf_getsym(symbols, GELF_R_SYM(rel.r_info), &symbol);
+ symbol_name = elf_strptr(elf, symbol_sh_link, symbol.st_name);
+
+ reloc->offset = rel.r_offset;
+ reloc->name = strdup(symbol_name);
+ }
+}
+
void radeon_elf_read(const char *elf_data, unsigned elf_size,
- struct radeon_shader_binary *binary,
- unsigned debug)
+ struct radeon_shader_binary *binary)
{
char *elf_buffer;
Elf *elf;
Elf_Scn *section = NULL;
+ Elf_Data *symbols = NULL, *relocs = NULL;
size_t section_str_index;
+ unsigned symbol_sh_link = 0;
/* One of the libelf implementations
* (http://www.mr511.de/software/english.htm) requires calling
elf = elf_memory(elf_buffer, elf_size);
elf_getshdrstrndx(elf, §ion_str_index);
- binary->disassembled = 0;
while ((section = elf_nextscn(elf, section))) {
const char *name;
binary->config_size = section_data->d_size;
binary->config = MALLOC(binary->config_size * sizeof(unsigned char));
memcpy(binary->config, section_data->d_buf, binary->config_size);
- } else if (debug && !strcmp(name, ".AMDGPU.disasm")) {
- binary->disassembled = 1;
+ } else if (!strcmp(name, ".AMDGPU.disasm")) {
+ /* Always read disassembly if it's available. */
section_data = elf_getdata(section, section_data);
- fprintf(stderr, "\nShader Disassembly:\n\n");
- fprintf(stderr, "%.*s\n", (int)section_data->d_size,
- (char *)section_data->d_buf);
+ binary->disasm_string = strndup(section_data->d_buf,
+ section_data->d_size);
} else if (!strncmp(name, ".rodata", 7)) {
section_data = elf_getdata(section, section_data);
binary->rodata_size = section_data->d_size;
binary->rodata = MALLOC(binary->rodata_size * sizeof(unsigned char));
memcpy(binary->rodata, section_data->d_buf, binary->rodata_size);
+ } else if (!strncmp(name, ".symtab", 7)) {
+ symbols = elf_getdata(section, section_data);
+ symbol_sh_link = section_header.sh_link;
+ parse_symbol_table(symbols, §ion_header, binary);
+ } else if (!strcmp(name, ".rel.text")) {
+ relocs = elf_getdata(section, section_data);
+ binary->reloc_count = section_header.sh_size /
+ section_header.sh_entsize;
}
}
+ parse_relocs(elf, relocs, symbols, symbol_sh_link, binary);
+
if (elf){
elf_end(elf);
}
FREE(elf_buffer);
+
+ /* Cache the config size per symbol */
+ if (binary->global_symbol_count) {
+ binary->config_size_per_symbol =
+ binary->config_size / binary->global_symbol_count;
+ } else {
+ binary->global_symbol_count = 1;
+ binary->config_size_per_symbol = binary->config_size;
+ }
+}
+
+const unsigned char *radeon_shader_binary_config_start(
+ const struct radeon_shader_binary *binary,
+ uint64_t symbol_offset)
+{
+ unsigned i;
+ for (i = 0; i < binary->global_symbol_count; ++i) {
+ if (binary->global_symbol_offsets[i] == symbol_offset) {
+ unsigned offset = i * binary->config_size_per_symbol;
+ return binary->config + offset;
+ }
+ }
+ return binary->config;
+}
+
+void radeon_shader_binary_free_relocs(struct radeon_shader_reloc *relocs,
+ unsigned reloc_count)
+{
+ unsigned i;
+ for (i = 0; i < reloc_count; i++) {
+ FREE(relocs[i].name);
+ }
+ FREE(relocs);
+}
+
+void radeon_shader_binary_free_members(struct radeon_shader_binary *binary,
+ unsigned free_relocs)
+{
+ FREE(binary->code);
+ FREE(binary->config);
+ FREE(binary->rodata);
+
+ if (free_relocs) {
+ radeon_shader_binary_free_relocs(binary->relocs,
+ binary->reloc_count);
+ }
}
projects / mesa.git / blobdiff