i386-darwin.macho: decompressor overrun, bswap Mach_fat_header
This commit is contained in:
John Reiser
parent
b598ad1bc0
commit
2bf154f74f
@ -1,5 +1,5 @@
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/* i386-darwin.macho-fold.h
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created from i386-darwin.macho-fold.bin, 999 (0x3e7) bytes
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created from i386-darwin.macho-fold.bin, 1115 (0x45b) bytes
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This file is part of the UPX executable compressor.
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@ -28,72 +28,79 @@
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*/
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#define STUB_I386_DARWIN_MACHO_FOLD_SIZE 999
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#define STUB_I386_DARWIN_MACHO_FOLD_ADLER32 0x99dddfb8
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#define STUB_I386_DARWIN_MACHO_FOLD_CRC32 0x2adf8df9
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#define STUB_I386_DARWIN_MACHO_FOLD_SIZE 1115
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#define STUB_I386_DARWIN_MACHO_FOLD_ADLER32 0x71810e47
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#define STUB_I386_DARWIN_MACHO_FOLD_CRC32 0x3b908132
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unsigned char stub_i386_darwin_macho_fold[999] = {
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204,141,124, 36,252,141,117, 2,139, 19,137,217, 41,209,139, 89, /* 0x 0 */
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24,184, 0, 8, 0, 0, 57,216,118, 2,137,195, 41,220, 96,232, /* 0x 10 */
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182, 2, 0, 0,139, 76, 36, 16,141,100, 12, 32,255, 96, 40, 90, /* 0x 20 */
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15, 52,176, 74,235, 2,176, 1,235, 2,176,153,235, 2,176, 6, /* 0x 30 */
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235, 2,176, 5,235, 2,176,197,235, 2,176, 3, 15,182,192,137, /* 0x 40 */
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225,232,217,255,255,255,115, 3,131,200,255,195, 85,137,229, 87, /* 0x 50 */
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86,139,125, 8, 83,137,195, 57, 56,139,112, 4,115, 7,106,127, /* 0x 60 */
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232,193,255,255,255,133,255,116, 10,137,249,138, 6, 70,136, 2, /* 0x 70 */
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66,226,248, 1,123, 4, 41, 59,141,101,244, 91, 94, 95,201,195, /* 0x 80 */
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85,137,229, 87, 86,137,198, 83,137,211,131,236, 24,139, 69, 8, /* 0x 90 */
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139,125, 12,137, 69,220,131, 58, 0, 15,132,172, 0, 0, 0,141, /* 0x a0 */
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85,228,137,240,106, 12,232,161,255,255,255,139, 69,228, 90,133, /* 0x b0 */
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192,139, 77,232,117, 19,129,249, 85, 80, 88, 33,117, 15,131, 62, /* 0x c0 */
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0, 15,132,132, 0, 0, 0,235, 4,133,201,117, 7,106,127,232, /* 0x d0 */
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82,255,255,255, 57,193,119,245, 59, 3,119,241, 57,193,115, 76, /* 0x e0 */
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137, 69,224, 15,182, 69,236, 80,141, 69,224, 80,255,115, 4, 81, /* 0x f0 */
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255,118, 4,255, 85,220,131,196, 20,133,192,117,208,139, 85,224, /* 0x 100 */
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59, 85,228,117,200,138, 69,237,132,192,116, 22,133,255,116, 18, /* 0x 110 */
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15,182,192, 80, 15,182, 69,238, 80, 82,255,115, 4,255,215,131, /* 0x 120 */
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196, 16,139, 69,232, 1, 70, 4, 41, 6,235, 12,139, 83, 4, 81, /* 0x 130 */
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137,240,232, 21,255,255,255, 88,139, 85,228,139, 3, 1, 83, 4, /* 0x 140 */
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41,208,133,192,137, 3,233, 78,255,255,255,141,101,244, 91, 94, /* 0x 150 */
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95,201,195, 85,137,229, 87, 86, 83,131,236, 48,137, 69,232,139, /* 0x 160 */
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69, 8,137, 85,228,139, 85, 12,199, 69,208, 0, 0, 0, 0,137, /* 0x 170 */
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69,224,139, 69, 20,137, 85,220,139, 85, 24,137, 69,216,139,117, /* 0x 180 */
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232,139, 69,232,137, 85,212, 49,210,131,198, 28,199, 69,204, 0, /* 0x 190 */
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0, 0, 0, 59, 80, 16, 15,131, 35, 1, 0, 0,139, 6,131,248, /* 0x 1a0 */
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1, 15,133,234, 0, 0, 0,139, 86, 24,139, 70, 28,139, 78, 36, /* 0x 1b0 */
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137,215, 1,208,137, 85,240,137, 69,200,137,208, 37,255, 15, 0, /* 0x 1c0 */
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0,137,203, 41,199, 1,195,137, 77,236,116, 55,139, 69,228, 3, /* 0x 1d0 */
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70, 32,133,201, 80,139, 69,220,117, 3,131,200,255,131,125,224, /* 0x 1e0 */
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0, 80,117, 9,133,201,184, 18, 0, 0, 0,117, 5,184, 18, 16, /* 0x 1f0 */
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0, 0, 80,106, 3, 83, 87,232, 58,254,255,255,131,196, 24, 57, /* 0x 200 */
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199,117, 88,131,125,224, 0,116, 36,131,126, 36, 0,116, 30,131, /* 0x 210 */
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126, 32, 0,117, 5,139, 85, 16,137, 58,255,117,212,255,117,216, /* 0x 220 */
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139, 69,224,141, 85,236,232, 85,254,255,255, 89, 88,137,216,141, /* 0x 230 */
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20, 31,247,216, 37,255, 15, 0, 0,137, 69,196,116, 8,137,193, /* 0x 240 */
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198, 2, 0, 66,226,250,133,219,116, 24,255,118, 44, 83, 87,232, /* 0x 250 */
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206,253,255,255,131,196, 12,133,192,116, 7,106,127,232,196,253, /* 0x 260 */
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255,255,139, 85,196,141, 4, 19,141, 28, 7, 59, 93,200,115, 59, /* 0x 270 */
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106, 0,106,255,104, 18, 16, 0, 0,255,118, 44, 41, 93,200,255, /* 0x 280 */
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117,200, 83,232,174,253,255,255,131,196, 24, 57,195,116, 28,235, /* 0x 290 */
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202,131,232, 4,131,248, 1,119, 18,131,126, 8,255,117, 12,131, /* 0x 2a0 */
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126, 12, 16,117, 6,141, 70, 16,137, 69,208,255, 69,204,139, 85, /* 0x 2b0 */
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232,139, 69,204, 3,118, 4, 59, 66, 16,233,215,254,255,255,139, /* 0x 2c0 */
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69,208,141,101,244, 91, 94, 95,201,195, 85,137,229, 87, 86, 83, /* 0x 2d0 */
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131,236, 32,199, 69,212, 0, 0, 0, 0,139, 85, 32,139, 69, 24, /* 0x 2e0 */
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139, 93, 16,137, 69,216,139,117, 20,141, 66, 24,137,117,232,137, /* 0x 2f0 */
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69,240,139, 69, 28,131,232, 24,137, 69,236,139, 66, 24,139, 85, /* 0x 300 */
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240,106, 0,137, 69,228,139, 69,236,137, 85,224,137, 69,220,141, /* 0x 310 */
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85,228,141, 69,236, 83,232,101,253,255,255,255,117, 12, 83, 49, /* 0x 320 */
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210,255,117, 8,141, 69,220,106,255, 80,137,240,232, 34,254,255, /* 0x 330 */
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255, 49,210,137,199,141, 70, 28,131,196, 28,139, 78, 16, 57,202, /* 0x 340 */
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15,131,135, 0, 0, 0,131, 56, 14,117,121, 3, 64, 8,106, 0, /* 0x 350 */
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106, 0, 80,232,218,252,255,255,131,196, 12,133,192,137,195,120, /* 0x 360 */
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21,255,117,212,255,117,216, 86, 83,232,188,252,255,255,131,196, /* 0x 370 */
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16, 57, 69,216,116, 15,106,127,232,169,252,255,255,139, 64, 8, /* 0x 380 */
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137, 69,212,235,220,129, 62,190,186,254,202,117, 23,141, 70, 8, /* 0x 390 */
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49,210,139, 78, 4, 57,202,115, 11,131, 56, 7,116,223, 66,131, /* 0x 3a0 */
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192, 20,235,241,106, 0,139, 85,212,106, 0,137,240,106, 0, 83, /* 0x 3b0 */
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106, 0,232,156,253,255,255, 83,137,199,232,111,252,255,255,131, /* 0x 3c0 */
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196, 24,235, 9, 3, 64, 4, 66,233,113,255,255,255,141,101,244, /* 0x 3d0 */
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137,248, 91, 94, 95,201,195 /* 0x 3e0 */
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unsigned char stub_i386_darwin_macho_fold[1115] = {
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141,124, 36,252,141,117, 2,139, 19,137,217, 41,209,139, 89, 24, /* 0x 0 */
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184, 0, 8, 0, 0, 57,216,118, 2,137,195, 41,220, 96,232, 16, /* 0x 10 */
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3, 0, 0,139, 76, 36, 16,141,100, 12, 32,255,112, 40, 41,192, /* 0x 20 */
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41,201, 41,210, 41,219, 41,237, 41,246, 41,255,195,139, 68, 36, /* 0x 30 */
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4,139, 76, 36, 8,139, 16, 15,202,137, 16,131,233, 4,141, 64, /* 0x 40 */
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4,115,242,195, 90, 15, 52,176, 74,235, 2,176, 73,235, 2,176, /* 0x 50 */
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1,235, 2,176,153,235, 2,176, 6,235, 2,176, 5,235, 2,176, /* 0x 60 */
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197,235, 2,176, 3, 15,182,192,137,225,232,213,255,255,255,115, /* 0x 70 */
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3,131,200,255,195,144,144,144, 85,137,229, 87, 86,139,125, 8, /* 0x 80 */
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83,137,195, 57, 56,139,112, 4,115, 7,106,127,232,190,255,255, /* 0x 90 */
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255,133,255,116, 10,137,249,138, 6, 70,136, 2, 66,226,248, 1, /* 0x a0 */
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123, 4, 41, 59,141,101,244, 91, 94, 95,201,195, 85,137,229, 87, /* 0x b0 */
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86,137,198, 83,137,211,131,236, 24,139, 69, 8,139,125, 12,137, /* 0x c0 */
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69,220,131, 58, 0, 15,132,172, 0, 0, 0,141, 85,228,137,240, /* 0x d0 */
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106, 12,232,161,255,255,255,139, 69,228, 90,133,192,139, 77,232, /* 0x e0 */
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117, 19,129,249, 85, 80, 88, 33,117, 15,131, 62, 0, 15,132,132, /* 0x f0 */
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0, 0, 0,235, 4,133,201,117, 7,106,127,232, 79,255,255,255, /* 0x 100 */
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57,193,119,245, 59, 3,119,241, 57,193,115, 76,137, 69,224, 15, /* 0x 110 */
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182, 69,236, 80,141, 69,224, 80,255,115, 4, 81,255,118, 4,255, /* 0x 120 */
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85,220,131,196, 20,133,192,117,208,139, 85,224, 59, 85,228,117, /* 0x 130 */
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200,138, 69,237,132,192,116, 22,133,255,116, 18, 15,182,192, 80, /* 0x 140 */
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15,182, 69,238, 80, 82,255,115, 4,255,215,131,196, 16,139, 69, /* 0x 150 */
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232, 1, 70, 4, 41, 6,235, 12,139, 83, 4, 81,137,240,232, 21, /* 0x 160 */
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255,255,255, 88,139, 85,228,139, 3, 1, 83, 4, 41,208,133,192, /* 0x 170 */
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137, 3,233, 78,255,255,255,141,101,244, 91, 94, 95,201,195, 85, /* 0x 180 */
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137,229, 87, 86, 83,131,236, 48,137, 69,232,139, 69, 8,137, 85, /* 0x 190 */
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228,139, 85, 12,199, 69,208, 0, 0, 0, 0,137, 69,224,139, 69, /* 0x 1a0 */
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20,137, 85,220,139, 85, 24,137, 69,216,139, 93,232,139, 69,232, /* 0x 1b0 */
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137, 85,212, 49,210,131,195, 28,199, 69,204, 0, 0, 0, 0, 59, /* 0x 1c0 */
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80, 16, 15,131, 80, 1, 0, 0,139, 3,131,248, 1, 15,133, 23, /* 0x 1d0 */
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1, 0, 0,139, 83, 24,139, 67, 28,139, 75, 36,137,214, 1,208, /* 0x 1e0 */
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137, 85,240,137, 69,200,137,208, 37,255, 15, 0, 0,137,207, 41, /* 0x 1f0 */
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198, 1,199,137, 77,236,116, 69,139, 69,228, 49,210, 3, 67, 32, /* 0x 200 */
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82,133,201, 80,139, 69,220,117, 3,131,200,255,131,125,224, 0, /* 0x 210 */
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80,117, 9,133,201,184, 18, 0, 0, 0,117, 5,184, 18, 16, 0, /* 0x 220 */
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0,131,125,224, 0, 80,106, 3,137,248,116, 3,141, 71, 3, 80, /* 0x 230 */
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86,232, 41,254,255,255,131,196, 28, 57,198,117, 88,131,125,224, /* 0x 240 */
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0,116, 36,131,123, 36, 0,116, 30,131,123, 32, 0,117, 5,139, /* 0x 250 */
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85, 16,137, 50,255,117,212,255,117,216,141, 85,236,139, 69,224, /* 0x 260 */
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232, 71,254,255,255, 88, 90,137,248,141, 20, 62,247,216, 37,255, /* 0x 270 */
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15, 0, 0,137, 69,196,116, 8,137,193,198, 2, 0, 66,226,250, /* 0x 280 */
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133,255,116, 24,255,115, 44, 87, 86,232,185,253,255,255,131,196, /* 0x 290 */
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12,133,192,116, 7,106,127,232,179,253,255,255,139, 85,196,141, /* 0x 2a0 */
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4, 23, 1,198, 59,117,200,115, 35,106, 0,106, 0,106,255,104, /* 0x 2b0 */
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18, 16, 0, 0,255,115, 44, 41,117,200,255,117,200, 86,232,156, /* 0x 2c0 */
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253,255,255,131,196, 28, 57,198,116, 58,235,201,131,125,224, 0, /* 0x 2d0 */
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116, 50,141, 71, 3, 37,255, 15, 0, 0,131,248, 3,119, 37, 80, /* 0x 2e0 */
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86,232,101,253,255,255, 89, 94,235, 26,131,232, 4,131,248, 1, /* 0x 2f0 */
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119, 18,131,123, 8, 1,117, 12,131,123, 12, 16,117, 6,141, 67, /* 0x 300 */
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16,137, 69,208,255, 69,204,139, 85,232,139, 69,204, 3, 91, 4, /* 0x 310 */
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59, 66, 16,233,170,254,255,255,139, 69,208,141,101,244, 91, 94, /* 0x 320 */
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95,201,195, 85,137,229, 87, 86, 83,131,236, 32,199, 69,212, 0, /* 0x 330 */
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0, 0, 0,139, 85, 32,139, 69, 24,139, 93, 16,137, 69,216,139, /* 0x 340 */
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117, 20,141, 66, 24,137,117,232,137, 69,240,139, 69, 28,131,232, /* 0x 350 */
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24,137, 69,236,139, 66, 24,139, 85,240,106, 0,137, 69,228,139, /* 0x 360 */
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69,236,137, 85,224,137, 69,220,141, 85,228,141, 69,236, 83,232, /* 0x 370 */
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56,253,255,255,255,117, 12, 83, 49,210,255,117, 8,141, 69,220, /* 0x 380 */
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106,255, 80,137,240,232,245,253,255,255, 49,210,137,195,141, 70, /* 0x 390 */
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28,131,196, 28,139, 78, 16, 57,202, 15,131,162, 0, 0, 0,131, /* 0x 3a0 */
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56, 14, 15,133,144, 0, 0, 0, 3, 64, 8,106, 0,106, 0, 80, /* 0x 3b0 */
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232,166,252,255,255,131,196, 12,133,192,137,199,120, 25, 49,210, /* 0x 3c0 */
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139, 69,212, 82, 80,255,117,216, 86, 87,232,132,252,255,255,131, /* 0x 3d0 */
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196, 20, 57, 69,216,116, 15,106,127,232,113,252,255,255,139, 91, /* 0x 3e0 */
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8,137, 93,212,235,216,129, 62,202,254,186,190,117, 42, 15,182, /* 0x 3f0 */
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70, 7,141, 94, 8,107,192, 20,131,192, 8, 80, 86,232, 43,252, /* 0x 400 */
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255,255, 89, 90, 49,192,139, 86, 4, 57,208,115, 11,131, 59, 7, /* 0x 410 */
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116,204, 64,131,195, 20,235,241,106, 0,139, 85,212,106, 0,137, /* 0x 420 */
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240,106, 0, 87,106, 0,232, 84,253,255,255, 87,137,195,232, 36, /* 0x 430 */
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252,255,255,131,196, 24,235, 9, 3, 64, 4, 66,233, 86,255,255, /* 0x 440 */
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255,141,101,244,137,216, 91, 94, 95,201,195 /* 0x 450 */
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};
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@ -58,7 +58,7 @@ i386_ts_fs = 14*4
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i386_ts_gs = 15*4
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fold_begin: // In: ebx= &total_length
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int3
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//// int3
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lea edi,[-4+ esp] # &mhdrpp
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lea esi,[ 2+ ebp] # &f_unfilter
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mov edx,[ebx] # sz_total
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@ -75,7 +75,27 @@ fold_begin: // In: ebx= &total_length
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call upx_main # Out: eax= &Mach_i386_thread_state of dyld
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mov ecx,[4*4 + esp] # sz_mhdr
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lea esp,[8*4 + 1*ecx + esp] # un_alloca
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jmp [i386_ts_eip + eax]
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push [i386_ts_eip + eax]
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sub eax,eax
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sub ecx,ecx
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sub edx,edx
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sub ebx,ebx
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sub ebp,ebp
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sub esi,esi
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sub edi,edi
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ret
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bswap: .globl bswap
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mov eax,[4+ esp] # ptr
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mov ecx,[8+ esp] # len
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0:
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mov edx,[eax]
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.byte 0x0f,0xc8+2 // bswap edx
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mov [eax],edx
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sub ecx,4
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lea eax,[4+ eax]
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jae 0b
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ret
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SYS_exit =1
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SYS_fork =2
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@ -86,6 +106,7 @@ SYS_close =6
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SYS_pread =153
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SYS_mmap =197
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SYS_munmap = 73
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SYS_mprotect= 74
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sysgo:
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@ -95,6 +116,8 @@ sysgo:
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// lazy jmps enable compression of this code
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mprotect: .globl mprotect
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mov al,SYS_mprotect; jmps 2+ 0f; 0:
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munmap: .globl munmap
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mov al,SYS_munmap; jmps 2+ 0f; 0:
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exit: .globl exit
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mov al,SYS_exit; jmps 2+ 0f; 0:
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pread: .globl pread
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@ -211,10 +211,11 @@ typedef struct {
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unsigned align; /* shift count; log base 2 */
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} Fat_arch;
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enum e8 {
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FAT_MAGIC = 0xcafebabe
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FAT_MAGIC = 0xbebafeca // 0xcafebabe in big endian
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};
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enum e9 {
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CPU_TYPE_I386 = 7,
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CPU_TYPE_AMD64 = 0x01000007,
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CPU_TYPE_POWERPC = 0x00000012,
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CPU_TYPE_POWERPC64 = 0x01000012
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};
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@ -285,7 +286,7 @@ typedef struct {
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Mach_i386_thread_state state;
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} Mach_thread_command;
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enum e6 {
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i386_THREAD_STATE = (unsigned)-1
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i386_THREAD_STATE = 1
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};
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enum e7 {
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i386_THREAD_STATE_COUNT = sizeof(Mach_i386_thread_state)/4
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@ -303,7 +304,10 @@ typedef union {
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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extern char *mmap(char *, size_t, unsigned, unsigned, int, /*off_t*/size_t);
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typedef long long off_t;
|
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extern char *mmap(char *, size_t, unsigned, unsigned, int, off_t);
|
||||
extern ssize_t pread(int, void *, size_t, off_t);
|
||||
extern void bswap(void *, unsigned);
|
||||
|
||||
static Mach_i386_thread_state const *
|
||||
do_xmap(
|
||||
@ -331,7 +335,9 @@ do_xmap(
|
||||
addr -= frag;
|
||||
mlen += frag;
|
||||
|
||||
if (0!=mlen && addr != mmap(addr, mlen, VM_PROT_READ | VM_PROT_WRITE,
|
||||
// Decompressor can overrun the destination by 3 bytes. [i386 only]
|
||||
if (0!=mlen && addr != mmap(addr, mlen + (xi ? 3 : 0),
|
||||
VM_PROT_READ | VM_PROT_WRITE,
|
||||
MAP_FIXED | MAP_PRIVATE |
|
||||
((xi || 0==sc->filesize) ? MAP_ANON : 0),
|
||||
((0==sc->filesize) ? -1 : fdi), sc->fileoff + fat_offset) ) {
|
||||
@ -357,6 +363,12 @@ ERR_LAB
|
||||
err_exit(9);
|
||||
}
|
||||
}
|
||||
else if (xi) { // cleanup if decompressor overrun crosses page boundary
|
||||
mlen = ~PAGE_MASK & (3+ mlen);
|
||||
if (mlen<=3) { // page fragment was overrun buffer only
|
||||
munmap(addr, mlen);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (LC_UNIXTHREAD==sc->cmd || LC_THREAD==sc->cmd) {
|
||||
Mach_thread_command const *const thrc = (Mach_thread_command const *)sc;
|
||||
@ -421,8 +433,9 @@ ERR_LAB
|
||||
case MH_MAGIC: break;
|
||||
case FAT_MAGIC: {
|
||||
// stupid Apple: waste code and a page fault on EVERY execve
|
||||
Fat_header const *const fh = (Fat_header const *)mhdr;
|
||||
Fat_arch const *fa = (Fat_arch const *)(1+ fh);
|
||||
Fat_header *const fh = (Fat_header *)mhdr;
|
||||
Fat_arch *fa = (Fat_arch *)(1+ fh);
|
||||
bswap(fh, sizeof(*fh) + (fh->nfat_arch>>24)*sizeof(*fa));
|
||||
for (j= 0; j < fh->nfat_arch; ++j, ++fa) {
|
||||
if (CPU_TYPE_I386==fa->cputype) {
|
||||
fat_offset= fa->offset;
|
||||
|
||||
@ -85,8 +85,8 @@ typedef size_t uintptr_t;
|
||||
int close(int);
|
||||
void exit(int) __attribute__((__noreturn__,__nothrow__));
|
||||
int mprotect(void *, size_t, int);
|
||||
extern int munmap(char *, size_t);
|
||||
int open(char const *, unsigned, unsigned);
|
||||
ssize_t pread(int, void *, size_t, unsigned);
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
|
||||
@ -316,6 +316,7 @@ typedef union {
|
||||
Adjust in mmap().
|
||||
*/
|
||||
extern char *mmap(char *, size_t, unsigned, unsigned, int, /*off_t*/size_t);
|
||||
ssize_t pread(int, void *, size_t, /*off_t*/unsigned); // FIXME?
|
||||
|
||||
static Mach_ppc_thread_state const *
|
||||
do_xmap(
|
||||
|
||||
Loading…
Reference in New Issue
Block a user