Original patches are from Lasse Collin <[email protected]>
Signed-off-by: YU Jincheng <[email protected]>
---
archival/libarchive/unxz/xz_config.h | 2 +
archival/libarchive/unxz/xz_dec_bcj.c | 152 +++++++++++++++++++++++++-
2 files changed, 153 insertions(+), 1 deletion(-)
diff --git a/archival/libarchive/unxz/xz_config.h
b/archival/libarchive/unxz/xz_config.h
index 187e1cbed..95d1817c8 100644
--- a/archival/libarchive/unxz/xz_config.h
+++ b/archival/libarchive/unxz/xz_config.h
@@ -17,6 +17,8 @@
/* #define XZ_DEC_ARM */
/* #define XZ_DEC_ARMTHUMB */
/* #define XZ_DEC_SPARC */
+/* #define XZ_DEC_ARM64 */
+/* #define XZ_DEC_RISCV */
#include <stdbool.h>
#include <stdlib.h>
diff --git a/archival/libarchive/unxz/xz_dec_bcj.c
b/archival/libarchive/unxz/xz_dec_bcj.c
index e0f913a94..5565dc773 100644
--- a/archival/libarchive/unxz/xz_dec_bcj.c
+++ b/archival/libarchive/unxz/xz_dec_bcj.c
@@ -24,7 +24,9 @@ struct xz_dec_bcj {
BCJ_IA64 = 6, /* Big or little endian */
BCJ_ARM = 7, /* Little endian only */
BCJ_ARMTHUMB = 8, /* Little endian only */
- BCJ_SPARC = 9 /* Big or little endian */
+ BCJ_SPARC = 9, /* Big or little endian */
+ BCJ_ARM64 = 10, /* AArch64 */
+ BCJ_RISCV = 11 /* RV32GQC_Zfh, RV64GQC_Zfh */
} type;
/*
@@ -340,6 +342,138 @@ static noinline_for_stack size_t XZ_FUNC bcj_sparc(
}
#endif
+#ifdef XZ_DEC_ARM64
+static size_t bcj_arm64(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
+{
+ size_t i;
+ uint32_t instr;
+ uint32_t addr;
+
+ for (i = 0; i + 4 <= size; i += 4) {
+ instr = get_unaligned_le32(buf + i);
+
+ if ((instr >> 26) == 0x25) {
+ /* BL instruction */
+ addr = instr - ((s->pos + (uint32_t)i) >> 2);
+ instr = 0x94000000 | (addr & 0x03FFFFFF);
+ put_unaligned_le32(instr, buf + i);
+
+ } else if ((instr & 0x9F000000) == 0x90000000) {
+ /* ADRP instruction */
+ addr = ((instr >> 29) & 3) | ((instr >> 3) & 0x1FFFFC);
+
+ /* Only convert values in the range +/-512 MiB. */
+ if ((addr + 0x020000) & 0x1C0000)
+ continue;
+
+ addr -= (s->pos + (uint32_t)i) >> 12;
+
+ instr &= 0x9000001F;
+ instr |= (addr & 3) << 29;
+ instr |= (addr & 0x03FFFC) << 3;
+ instr |= (0U - (addr & 0x020000)) & 0xE00000;
+
+ put_unaligned_le32(instr, buf + i);
+ }
+ }
+
+ return i;
+}
+#endif
+
+#ifdef XZ_DEC_RISCV
+static size_t bcj_riscv(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
+{
+ size_t i;
+ uint32_t b1;
+ uint32_t b2;
+ uint32_t b3;
+ uint32_t instr;
+ uint32_t instr2;
+ uint32_t instr2_rs1;
+ uint32_t addr;
+
+ if (size < 8)
+ return 0;
+
+ size -= 8;
+
+ for (i = 0; i <= size; i += 2) {
+ instr = buf[i];
+
+ if (instr == 0xEF) {
+ /* JAL */
+ b1 = buf[i + 1];
+ if ((b1 & 0x0D) != 0)
+ continue;
+
+ b2 = buf[i + 2];
+ b3 = buf[i + 3];
+
+ addr = ((b1 & 0xF0) << 13) | (b2 << 9) | (b3 << 1);
+ addr -= s->pos + (uint32_t)i;
+
+ buf[i + 1] = (uint8_t)((b1 & 0x0F)
+ | ((addr >> 8) & 0xF0));
+
+ buf[i + 2] = (uint8_t)(((addr >> 16) & 0x0F)
+ | ((addr >> 7) & 0x10)
+ | ((addr << 4) & 0xE0));
+
+ buf[i + 3] = (uint8_t)(((addr >> 4) & 0x7F)
+ | ((addr >> 13) & 0x80));
+
+ i += 4 - 2;
+
+ } else if ((instr & 0x7F) == 0x17) {
+ /* AUIPC */
+ instr |= (uint32_t)buf[i + 1] << 8;
+ instr |= (uint32_t)buf[i + 2] << 16;
+ instr |= (uint32_t)buf[i + 3] << 24;
+
+ if (instr & 0xE80) {
+ /* AUIPC's rd doesn't equal x0 or x2. */
+ instr2 = get_unaligned_le32(buf + i + 4);
+
+ if (((instr << 8) ^ (instr2 - 3)) & 0xF8003) {
+ i += 6 - 2;
+ continue;
+ }
+
+ addr = (instr & 0xFFFFF000) + (instr2 >> 20);
+
+ instr = 0x17 | (2 << 7) | (instr2 << 12);
+ instr2 = addr;
+ } else {
+ /* AUIPC's rd equals x0 or x2. */
+ instr2_rs1 = instr >> 27;
+
+ if ((uint32_t)((instr - 0x3117) << 18)
+ >= (instr2_rs1 & 0x1D)) {
+ i += 4 - 2;
+ continue;
+ }
+
+ addr = get_unaligned_be32(buf + i + 4);
+ addr -= s->pos + (uint32_t)i;
+
+ instr2 = (instr >> 12) | (addr << 20);
+
+ instr = 0x17 | (instr2_rs1 << 7)
+ | ((addr + 0x800) & 0xFFFFF000);
+ }
+
+ put_unaligned_le32(instr, buf + i);
+ put_unaligned_le32(instr2, buf + i + 4);
+
+ i += 8 - 2;
+ }
+ }
+
+ return i;
+}
+#endif
+
/*
* Apply the selected BCJ filter. Update *pos and s->pos to match the amount
* of data that got filtered.
@@ -386,6 +520,16 @@ static void XZ_FUNC bcj_apply(struct xz_dec_bcj *s,
case BCJ_SPARC:
filtered = bcj_sparc(s, buf, size);
break;
+#endif
+#ifdef XZ_DEC_ARM64
+ case BCJ_ARM64:
+ filtered = bcj_arm64(s, buf, size);
+ break;
+#endif
+#ifdef XZ_DEC_RISCV
+ case BCJ_RISCV:
+ filtered = bcj_riscv(s, buf, size);
+ break;
#endif
default:
/* Never reached but silence compiler warnings. */
@@ -559,6 +703,12 @@ XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_bcj_reset(
#endif
#ifdef XZ_DEC_SPARC
case BCJ_SPARC:
+#endif
+#ifdef XZ_DEC_ARM64
+ case BCJ_ARM64:
+#endif
+#ifdef XZ_DEC_RISCV
+ case BCJ_RISCV:
#endif
break;
--
2.43.0
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