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Catch up to jmpbuf changes. Define offsets used from assmebly language

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in another file so that it is easy to see what they are and keep them in
sync with the headers (grafted from the kernel generated assym.s).
This commit is contained in:
Jake Burkholder 2001-11-18 04:35:09 +00:00
parent 29e5109c5f
commit c8efb16966
2 changed files with 39 additions and 24 deletions
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47
lib/libc/sparc64/gen/_setjmp.S
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@ -52,6 +52,8 @@
#include <machine/asm.h>
#include "assym.s"
/*
* C library -- _setjmp, _longjmp
*
@ -63,39 +65,36 @@
* The previous signal state is NOT restored.
*/
#define JB_SP 0x0
#define JB_PC 0x8
#define JB_FP 0x10
ENTRY(_setjmp)
stx %sp, [%o0 + JB_SP] /* store caller's stack pointer */
stx %o7, [%o0 + JB_PC] /* ... return pc */
stx %fp, [%o0 + JB_FP] /* ... and frame pointer */
stx %sp, [%o0 + UC_MC + MC_O6]
stx %o7, [%o0 + UC_MC + MC_O7]
stx %fp, [%o0 + UC_MC + MC_G1]
retl
clr %o0 ! return 0
clr %o0
END(_setjmp)
ENTRY(_longjmp)
mov 1, %g6
movrnz %o1, %o1, %g6 ! compute v ? v : 1 in a global register
mov %o0, %g1 ! save a in another global register
ldx [%g1 + JB_FP], %g7 /* get caller's frame */
1: cmp %fp, %g7 ! compare against desired frame
bl,a 1b ! if below,
restore ! pop frame and loop
be,a 2f ! if there,
ldx [%g1 + JB_SP], %o2 ! fetch return %sp
mov 1, %g1
movrnz %o1, %o1, %g1 ! compute v ? v : 1
mov %o0, %g2
ldx [%g2 + UC_MC + MC_G1], %g3 ! fetch callers frame
1: cmp %fp, %g3 ! compare against desired frame
bl,a 1b ! if below,
restore ! pop frame and loop
be,a 2f ! if there,
ldx [%g2 + UC_MC + MC_O6], %o0 ! fetch return %sp
.Lbotch:
call CNAME(longjmperror) ! otherwise, went too far; bomb out
call CNAME(longjmperror)
nop
illtrap
2: cmp %o2, %sp ! %sp must not decrease
2: cmp %o0, %sp ! %sp must not decrease
bge,a 3f
mov %o2, %sp ! it is OK, put it in place
mov %o0, %sp ! it is OK, put it in place
b,a .Lbotch
nop
3: ldx [%g1 + JB_PC], %o3 ! fetch pc
jmp %o3 + 8 ! success, return %g6
mov %g6, %o0
3: ldx [%g2 + UC_MC + MC_O7], %o7 ! fetch return address
retl
mov %g1, %o0 ! return v ? v : 1;
END(_longjmp)

16
lib/libc/sparc64/gen/assym.s Normal file
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@ -0,0 +1,16 @@
/*
* Offsets into into structures used from asm. Must be kept in sync with
* appropriate headers.
*
* $FreeBSD$
*/
#define UC_SIGMASK 0x0
#define UC_MC 0x10
#define MC_G1 0x8
#define MC_O0 0x40
#define MC_O1 0x48
#define MC_O6 0x70
#define MC_O7 0x78
#define MC_TNPC 0x90
#define MC_TPC 0x88