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More macro magic

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This commit is contained in:
topjohnwu 2019-02-21 04:14:52 -05:00
parent 7cee77f57a
commit b4c2a9f49f
2 changed files with 30 additions and 27 deletions
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11
native/jni/magiskboot/bootimg.cpp
View File

@ -13,6 +13,9 @@
#include "magiskboot.h"
#include "compress.h"
uint32_t dyn_img_hdr::j32 = 0;
uint64_t dyn_img_hdr::j64 = 0;
static void dump(void *buf, size_t size, const char *filename) {
if (size == 0)
return;
@ -371,14 +374,14 @@ void repack(const char* orig_image, const char* out_image) {
// extra
extra_off = lseek(fd, 0, SEEK_CUR);
if (access(EXTRA_FILE, R_OK) == 0) {
boot.hdr.extra_size(restore(EXTRA_FILE, fd));
boot.hdr.extra_size() = restore(EXTRA_FILE, fd);
file_align();
}
// recovery_dtbo
if (access(RECV_DTBO_FILE, R_OK) == 0) {
boot.hdr.recovery_dtbo_offset(lseek(fd, 0, SEEK_CUR));
boot.hdr.recovery_dtbo_size(restore(RECV_DTBO_FILE, fd));
boot.hdr.recovery_dtbo_offset() = lseek(fd, 0, SEEK_CUR);
boot.hdr.recovery_dtbo_size() = restore(RECV_DTBO_FILE, fd);
file_align();
}
@ -439,7 +442,7 @@ void repack(const char* orig_image, const char* out_image) {
// Try to fix the header
if (boot.hdr.header_version() && boot.hdr.header_size() == 0)
boot.hdr.header_size(sizeof(boot_img_hdr));
boot.hdr.header_size() = sizeof(boot_img_hdr);
// Main header
memcpy(boot.map_addr + header_off, *boot.hdr, boot.hdr.hdr_size());

46
native/jni/magiskboot/bootimg.h
View File

@ -147,28 +147,24 @@ struct blob_hdr {
struct dyn_img_hdr {
#define dyn_access(x) (pxa ? hdr_pxa->x : v1_hdr->x)
#define dyn_get(name, type) type name() const { return dyn_access(name); }
#define dyn_set(name, type) void name(type v) { dyn_access(name) = v; }
#define dyn_func(name, type) \
dyn_get(name, type) \
dyn_set(name, type)
#define dyn_get(name, type) \
type name() const { return dyn_access(name); }
#define dyn_ref(name, type) \
type &name() { return dyn_access(name); }
#define v1_ref(name, type, alt) \
type &name() { if (pxa) { alt = 0; return alt; } return v1_hdr->name; }
#define v1_func(name, type) \
type name() const { return pxa ? 0 : v1_hdr->name; } \
void name(type v) { if (!pxa) v1_hdr->name = v; }
dyn_func(extra_size, uint32_t);
dyn_func(page_size, uint32_t);
dyn_ref(page_size, uint32_t);
dyn_get(name, char *);
dyn_get(cmdline, char *);
dyn_get(id, char *);
dyn_get(extra_cmdline, char *);
v1_func(os_version, uint32_t);
v1_func(recovery_dtbo_size, uint32_t);
v1_func(recovery_dtbo_offset, uint32_t);
v1_func(header_size, uint32_t);
v1_ref(os_version, uint32_t, j32);
v1_ref(recovery_dtbo_size, uint32_t, j32);
v1_ref(recovery_dtbo_offset, uint64_t, j64);
v1_ref(header_size, uint32_t, j32);
dyn_img_hdr() : pxa(false), img_hdr(nullptr) {}
~dyn_img_hdr() {
@ -179,17 +175,18 @@ void name(type v) { if (!pxa) v1_hdr->name = v; }
}
uint32_t header_version() {
if (pxa)
return 0;
uint32_t ver = v1_hdr->header_version;
// There won't be v4 header any time soon...
// If larger than 4, assume this field will be treated as extra_size
return ver > 4 ? 0 : ver;
return pxa || v1_hdr->header_version > 4 ? 0 : v1_hdr->header_version;
}
uint32_t extra_size() {
uint32_t &extra_size() {
// If header version > 0, we should treat this field as header_version
return header_version() ? 0 : dyn_access(extra_size);
if (header_version()) {
j32 = 0;
return j32;
}
return dyn_access(extra_size);
}
size_t hdr_size() {
@ -216,13 +213,16 @@ void name(type v) { if (!pxa) v1_hdr->name = v; }
private:
bool pxa;
union {
/* Main header is either AOSP or PXA
* but both of them is a base header
/* Main header could be either AOSP or PXA,
* but both of them is a base header.
* Same address can be interpreted in 3 ways */
boot_img_hdr_base *img_hdr; /* Common base header */
boot_img_hdr *v1_hdr; /* AOSP v1 header */
boot_img_hdr_pxa *hdr_pxa; /* Samsung PXA header */
};
static uint32_t j32;
static uint64_t j64;
};
struct boot_img {