1 /* $OpenBSD: setjmp.h,v 1.4 2016/08/07 02:02:57 guenther Exp $ */ 2 /* $NetBSD: setjmp.h,v 1.2 2001/08/25 14:45:59 bjh21 Exp $ */ 3 4 /* 5 * machine/setjmp.h: machine dependent setjmp-related information. 6 */ 7 8 #define _JBLEN 64 /* size, in longs, of a jmp_buf */ 9 10 /* 11 * Description of the setjmp buffer 12 * 13 * word 0 magic number (dependant on creator) 14 * 1 - 3 f4 fp register 4 15 * 4 - 6 f5 fp register 5 16 * 7 - 9 f6 fp register 6 17 * 10 - 12 f7 fp register 7 18 * 13 fpsr fp status register 19 * 14 r13 register 13 (sp) XOR cookie0 20 * 15 r14 register 14 (lr) XOR cookie1 21 * 16 r4 register 4 22 * 17 r5 register 5 23 * 18 r6 register 6 24 * 19 r7 register 7 25 * 20 r8 register 8 26 * 21 r9 register 9 27 * 22 r10 register 10 (sl) 28 * 23 r11 register 11 (fp) 29 * 24 unused unused 30 * 25 signal mask (dependant on magic) 31 * 26 (con't) 32 * 27 (con't) 33 * 28 (con't) 34 * 35 * The magic number number identifies the jmp_buf and 36 * how the buffer was created as well as providing 37 * a sanity check. 38 * 39 * A side note I should mention - please do not tamper 40 * with the floating point fields. While they are 41 * always saved and restored at the moment this cannot 42 * be guaranteed especially if the compiler happens 43 * to be generating soft-float code so no fp 44 * registers will be used. 45 * 46 * Whilst this can be seen an encouraging people to 47 * use the setjmp buffer in this way I think that it 48 * is for the best then if changes occur compiles will 49 * break rather than just having new builds falling over 50 * mysteriously. 51 */ 52 53 #define _JB_MAGIC__SETJMP 0x4278f500 54 #define _JB_MAGIC_SETJMP 0x4278f501 55 56 /* Valid for all jmp_buf's */ 57 58 #define _JB_MAGIC 0 59 #define _JB_REG_F4 1 60 #define _JB_REG_F5 4 61 #define _JB_REG_F6 7 62 #define _JB_REG_F7 10 63 #define _JB_REG_FPSR 13 64 #define _JB_REG_R4 16 65 #define _JB_REG_R5 17 66 #define _JB_REG_R6 18 67 #define _JB_REG_R7 19 68 #define _JB_REG_R8 20 69 #define _JB_REG_R9 21 70 #define _JB_REG_R10 22 71 #define _JB_REG_R11 23 72 73 /* Only valid with the _JB_MAGIC_SETJMP magic */ 74 75 #define _JB_SIGMASK 25 76