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author | cognet <cognet@FreeBSD.org> | 2004-05-14 11:46:45 +0000 |
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committer | cognet <cognet@FreeBSD.org> | 2004-05-14 11:46:45 +0000 |
commit | 295dcdd68788bc2248ebf4ab1df93d68da49b711 (patch) | |
tree | 3eb2afc6dea26c92444202ed2d06bac484ff40ae /sys/arm/include/setjmp.h | |
parent | dd167f263352cec86bd3c4298031380259b2fb17 (diff) | |
download | FreeBSD-src-295dcdd68788bc2248ebf4ab1df93d68da49b711.zip FreeBSD-src-295dcdd68788bc2248ebf4ab1df93d68da49b711.tar.gz |
Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.
Diffstat (limited to 'sys/arm/include/setjmp.h')
-rw-r--r-- | sys/arm/include/setjmp.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sys/arm/include/setjmp.h b/sys/arm/include/setjmp.h new file mode 100644 index 0000000..79c1330 --- /dev/null +++ b/sys/arm/include/setjmp.h @@ -0,0 +1,93 @@ +/* $NetBSD: setjmp.h,v 1.2 2001/08/25 14:45:59 bjh21 Exp $ */ +/* $FreeBSD$ */ + +/* + * machine/setjmp.h: machine dependent setjmp-related information. + */ + +#ifdef __ELF__ +#define _JBLEN 64 /* size, in longs, of a jmp_buf */ +#else +#define _JBLEN 29 /* size, in longs, of a jmp_buf */ +#endif + +/* + * NOTE: The internal structure of a jmp_buf is *PRIVATE* + * This information is provided as there is software + * that fiddles with this with obtain the stack pointer + * (yes really ! and its commercial !). + * + * Description of the setjmp buffer + * + * word 0 magic number (dependant on creator) + * 1 - 3 f4 fp register 4 + * 4 - 6 f5 fp register 5 + * 7 - 9 f6 fp register 6 + * 10 - 12 f7 fp register 7 + * 13 fpsr fp status register + * 14 r4 register 4 + * 15 r5 register 5 + * 16 r6 register 6 + * 17 r7 register 7 + * 18 r8 register 8 + * 19 r9 register 9 + * 20 r10 register 10 (sl) + * 21 r11 register 11 (fp) + * 22 r12 register 12 (ip) + * 23 r13 register 13 (sp) + * 24 r14 register 14 (lr) + * 25 signal mask (dependant on magic) + * 26 (con't) + * 27 (con't) + * 28 (con't) + * + * The magic number number identifies the jmp_buf and + * how the buffer was created as well as providing + * a sanity check + * + * A side note I should mention - Please do not tamper + * with the floating point fields. While they are + * always saved and restored at the moment this cannot + * be garenteed especially if the compiler happens + * to be generating soft-float code so no fp + * registers will be used. + * + * Whilst this can be seen an encouraging people to + * use the setjmp buffer in this way I think that it + * is for the best then if changes occur compiles will + * break rather than just having new builds falling over + * mysteriously. + */ + +#define _JB_MAGIC__SETJMP 0x4278f500 +#define _JB_MAGIC_SETJMP 0x4278f501 + +/* Valid for all jmp_buf's */ + +#define _JB_MAGIC 0 +#define _JB_REG_F4 1 +#define _JB_REG_F5 4 +#define _JB_REG_F6 7 +#define _JB_REG_F7 10 +#define _JB_REG_FPSR 13 +#define _JB_REG_R4 14 +#define _JB_REG_R5 15 +#define _JB_REG_R6 16 +#define _JB_REG_R7 17 +#define _JB_REG_R8 18 +#define _JB_REG_R9 19 +#define _JB_REG_R10 20 +#define _JB_REG_R11 21 +#define _JB_REG_R12 22 +#define _JB_REG_R13 23 +#define _JB_REG_R14 24 + +/* Only valid with the _JB_MAGIC_SETJMP magic */ + +#define _JB_SIGMASK 25 +#if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE +typedef struct _sigjmp_buf { int _sjb[_JBLEN + 1]; } sigjmp_buf[1]; +#endif + +typedef struct _jmp_buf { int _jb[_JBLEN + 1]; } jmp_buf[1]; + |