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Get llama.com building as an aarch64 native binary

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This commit is contained in:
Justine Tunney 2023-05-09 12:14:57 -07:00
parent d04430f4ef
commit 4c093155a3
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GPG key ID: BE714B4575D6E328
40 changed files with 7842 additions and 11683 deletions
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28
tool/build/lib/elfwriter.c
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "tool/build/lib/elfwriter.h"
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/elf/def.h"
@ -30,7 +31,6 @@
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/x/xasprintf.h"
#include "tool/build/lib/elfwriter.h"
static const Elf64_Ehdr kObjHeader = {
.e_ident = {ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3, ELFCLASS64, ELFDATA2LSB, 1,
@ -166,6 +166,15 @@ struct ElfWriter *elfwriter_open(const char *path, int mode) {
elf->mapsize, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_FIXED, elf->fd, 0)));
elf->ehdr = memcpy(elf->map, &kObjHeader, (elf->wrote = sizeof(kObjHeader)));
if (strstr(path, "/aarch64")) {
elf->ehdr->e_machine = EM_AARCH64;
} else if (strstr(path, "/powerpc64")) {
elf->ehdr->e_machine = EM_PPC64;
} else if (strstr(path, "/riscv")) {
elf->ehdr->e_machine = EM_RISCV;
} else if (strstr(path, "/s390")) {
elf->ehdr->e_machine = EM_S390;
}
elf->strtab = newinterner();
elf->shstrtab = newinterner();
intern(elf->strtab, "");
@ -274,3 +283,20 @@ void elfwriter_appendrela(struct ElfWriter *elf, uint64_t r_offset,
.offset = r_offset,
.addend = r_addend})));
}
uint32_t elfwriter_relatype_abs32(const struct ElfWriter *elf) {
switch (elf->ehdr->e_machine) {
case EM_NEXGEN32E:
return R_X86_64_32;
case EM_AARCH64:
return R_AARCH64_ABS32;
case EM_PPC64:
return R_PPC64_ADDR32;
case EM_RISCV:
return R_RISCV_32;
case EM_S390:
return R_390_32;
default:
notpossible;
}
}

1
tool/build/lib/elfwriter.h
View file

@ -64,6 +64,7 @@ void elfwriter_commit(struct ElfWriter *, size_t);
void elfwriter_finishsection(struct ElfWriter *);
void elfwriter_appendrela(struct ElfWriter *, uint64_t, struct ElfWriterSymRef,
uint32_t, int64_t);
uint32_t elfwriter_relatype_abs32(const struct ElfWriter *);
struct ElfWriterSymRef elfwriter_linksym(struct ElfWriter *, const char *, int,
int);
struct ElfWriterSymRef elfwriter_appendsym(struct ElfWriter *, const char *,

3
tool/build/lib/elfwriter_yoink.c
View file

@ -27,6 +27,7 @@ void elfwriter_yoink(struct ElfWriter *elf, const char *symbol, int stb) {
memcpy(p, kNopl, sizeof(kNopl));
sym = elfwriter_linksym(elf, symbol, ELF64_ST_INFO(stb, STT_OBJECT),
STV_HIDDEN);
elfwriter_appendrela(elf, sizeof(kNopl) - 4, sym, R_X86_64_32, 0);
elfwriter_appendrela(elf, sizeof(kNopl) - 4, sym,
elfwriter_relatype_abs32(elf), 0);
elfwriter_commit(elf, sizeof(kNopl));
}

4
tool/build/lib/elfwriter_zip.c
View file

@ -215,8 +215,8 @@ void elfwriter_zip(struct ElfWriter *elf, const char *symbol, const char *name,
elfwriter_appendsym(elf, _gc(xasprintf("%s%s", "zip+cdir:", name)),
ELF64_ST_INFO(STB_LOCAL, STT_OBJECT), STV_DEFAULT, 0,
kZipCdirHdrLinkableSizeBootstrap);
elfwriter_appendrela(elf, kZipCfileOffsetOffset, lfilesym, R_X86_64_32,
-imagebase);
elfwriter_appendrela(elf, kZipCfileOffsetOffset, lfilesym,
elfwriter_relatype_abs32(elf), -imagebase);
elfwriter_commit(elf, kZipCdirHdrLinkableSizeBootstrap);
elfwriter_finishsection(elf);
}