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rsc 2006-02-16 06:18:19 +00:00
parent 229086e790
commit 8712d1a38e
1 changed files with 6 additions and 4 deletions
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10
src/libthread/Linux-sparc64-swapcontext.c
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@ -19,18 +19,21 @@
#include <ucontext.h> #include <ucontext.h>
#define UC_M_PC 40
#define UC_M_NPC 48
extern int __getcontext (ucontext_t *ucp); extern int __getcontext (ucontext_t *ucp);
extern int __setcontext (const ucontext_t *ucp, int restoremask); extern int __setcontext (const ucontext_t *ucp, int restoremask);
int int
__swapcontext (ucontext_t *oucp, const ucontext_t *ucp) swapcontext (ucontext_t *oucp, const ucontext_t *ucp)
{ {
extern void __swapcontext_ret (void); extern void __swapcontext_ret (void);
/* Save the current machine context to oucp. */ /* Save the current machine context to oucp. */
__getcontext (oucp); __getcontext (oucp);
/* Modify oucp to skip the __setcontext call on reactivation. */ /* Modify oucp to skip the __setcontext call on reactivation. */
oucp->uc_mcontext.mc_gregs[MC_PC] = (long) __swapcontext_ret; *(long*)((char*)oucp+UC_M_PC) = (long)__swapcontext_ret;
oucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) __swapcontext_ret) + 4; *(long*)((char*)oucp+UC_M_NPC) = (long)__swapcontext_ret + 4;
/* Restore the machine context in ucp. */ /* Restore the machine context in ucp. */
__setcontext (ucp, 1); __setcontext (ucp, 1);
return 0; return 0;
@ -45,4 +48,3 @@ __swapcontext_ret: \n\
.size __swapcontext_ret, .-__swapcontext_ret \n\ .size __swapcontext_ret, .-__swapcontext_ret \n\
"); ");
weak_alias (__swapcontext, swapcontext)