From: Jurij Smakov <jurij@xxxxxxxxx> Date: Sat, 8 Oct 2011 00:22:10 +0100 > #define RW_FP [%fp + 0x48] Let's just do away with this value entirely and do this the safest way possible, since this is the slow path: diff --git a/sysdeps/sparc/sparc32/__longjmp.S b/sysdeps/sparc/sparc32/__longjmp.S index a5453b4..70e8e29 100644 --- a/sysdeps/sparc/sparc32/__longjmp.S +++ b/sysdeps/sparc/sparc32/__longjmp.S @@ -22,7 +22,6 @@ #include <jmpbuf-offsets.h> #define ENV(base,reg) [%base + (reg * 4)] #define ST_FLUSH_WINDOWS 3 -#define RW_FP [%fp + 0x48] ENTRY(__longjmp) /* Store our arguments in global registers so we can still @@ -55,6 +54,7 @@ LOC(loop): ld ENV(g1,JB_SP), %o0 /* Delay slot: extract target SP. */ LOC(thread): + save %sp, -96, %sp /* * Do a "flush register windows trap". The trap handler in the * kernel writes all the register windows to their stack slots, and @@ -67,15 +67,13 @@ LOC(thread): #ifdef PTR_DEMANGLE ld ENV(g1,JB_PC), %g5 /* Set return PC. */ ld ENV(g1,JB_SP), %g1 /* Set saved SP on restore below. */ - PTR_DEMANGLE2 (%o7, %g5, %g4) + PTR_DEMANGLE2 (%i7, %g5, %g4) PTR_DEMANGLE2 (%fp, %g1, %g4) #else - ld ENV(g1,JB_PC), %o7 /* Set return PC. */ + ld ENV(g1,JB_PC), %i7 /* Set return PC. */ ld ENV(g1,JB_SP), %fp /* Set saved SP on restore below. */ #endif - sub %fp, 64, %sp /* Allocate a register frame. */ - st %g3, RW_FP /* Set saved FP on restore below. */ - retl + jmp %i7 + 8 restore %g2, 0, %o0 /* Restore values from above register frame. */ LOC(found): -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
