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arm64 tracing in stub

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modified:   ../../linker.cpp
	modified:   ../../p_lx_elf.cpp
	modified:   arm64-linux.elf-entry.S
This commit is contained in:
John Reiser
2017-05-06 19:37:37 -07:00
parent 61798d33f0
commit 90714cf624
3 changed files with 116 additions and 74 deletions
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src/linker.cpp
+28 -33
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@@ -592,35 +592,6 @@ void ElfLinkerAMD64::relocate1(const Relocation *rel, upx_byte *location, upx_ui
super::relocate1(rel, location, value, type);
}
void ElfLinkerARM64::relocate1(const Relocation *rel, upx_byte *location, upx_uint64_t value,
const char *type) {
if (strncmp(type, "R_AARCH64_", 10))
return super::relocate1(rel, location, value, type);
type += 10;
if (!strncmp(type, "PREL", 4)) {
value -= rel->section->offset + rel->offset;
type += 4;
if (!strcmp(type, "16"))
set_le16(location, get_le16(location) + value);
else if (!strncmp(type, "32", 2)) // for "32" and "32S"
set_le32(location, get_le32(location) + value);
else if (!strcmp(type, "64"))
set_le64(location, get_le64(location) + value);
} else if (!strcmp(type, "ABS32")) {
set_le32(location, get_le32(location) + value);
} else if (!strcmp(type, "ABS64")) {
set_le64(location, get_le64(location) + value);
} else if (!strcmp(type, "CONDBR19")) {
value -= rel->section->offset + rel->offset;
upx_uint32_t const m19 = ~(~0u << 19);
upx_uint32_t w = get_le32(location);
set_le32(location, (w & ~(m19 << 5)) | ((((w >> 5) + (value >> 2)) & m19) << 5));
} else
super::relocate1(rel, location, value, type);
}
void ElfLinkerArmBE::relocate1(const Relocation *rel, upx_byte *location, upx_uint64_t value,
const char *type) {
if (strcmp(type, "R_ARM_PC24") == 0) {
@@ -670,12 +641,36 @@ void ElfLinkerArmLE::relocate1(const Relocation *rel, upx_byte *location, upx_ui
}
void ElfLinkerArm64LE::relocate1(const Relocation *rel, upx_byte *location, upx_uint64_t value,
const char *type) {
if (strcmp(type, "R_AARCH64_CALL26") == 0) {
const char *type)
{
if (strncmp(type, "R_AARCH64_", 10))
return super::relocate1(rel, location, value, type);
type += 10;
if (!strncmp(type, "PREL", 4)) {
value -= rel->section->offset + rel->offset;
set_le24(location, get_le24(location) + value / 4); // FIXME set_le26
} else if (strcmp(type, "R_AARCH64_ABS32") == 0) {
type += 4;
if (!strcmp(type, "16"))
set_le16(location, get_le16(location) + value);
else if (!strncmp(type, "32", 2)) // for "32" and "32S"
set_le32(location, get_le32(location) + value);
else if (!strcmp(type, "64"))
set_le64(location, get_le64(location) + value);
} else if (!strcmp(type, "ABS32")) {
set_le32(location, get_le32(location) + value);
} else if (!strcmp(type, "ABS64")) {
set_le64(location, get_le64(location) + value);
} else if (!strcmp(type, "CONDBR19")) {
value -= rel->section->offset + rel->offset;
upx_uint32_t const m19 = ~(~0u << 19);
upx_uint32_t w = get_le32(location);
set_le32(location, (w & ~(m19 << 5)) | ((((w >> 5) + (value >> 2)) & m19) << 5));
} else if (!strcmp(type, "CALL26")) {
value -= rel->section->offset + rel->offset;
upx_uint32_t const m26 = ~(~0u << 26);
upx_uint32_t w = get_le32(location);
set_le32(location, (w & ~m26) | (m26 & (value >> 2)));
} else
super::relocate1(rel, location, value, type);
}