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SH: makecontext/.Lexitcode: Always initialize the GOT register before use. 

This is only relevant when returning from a context with »uc_link == NULL«,
which is not exercised in the testsuite.
This commit is contained in:
Thomas Schwinge 2012-06-23 11:42:29 +02:00
parent 2a649725b9
commit a9def8c49d
2 changed files with 11 additions and 4 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2012-06-23 Thomas Schwinge <thomas@codesourcery.com>
* sysdeps/unix/sysv/linux/sh/makecontext.S (.Lexitcode): Always
initialize the GOT register before use.
* sysdeps/unix/sysv/linux/sh/makecontext.S (__makecontext): Fix
calculation of ARGC > 4.

12
sysdeps/unix/sysv/linux/sh/makecontext.S
View File

@ -97,22 +97,26 @@ ENTRY(__makecontext)
.align 5
.Lexitcode:
tst r8, r8 /* ucb->uc_link == NULL? */
bt/s 2f
mov r8, r4 /* r4 <- ucb->uc_link */
#ifdef PIC
mova .Lgot, r0
mov.l .Lgot, r12
add r0, r12
#endif
tst r8, r8 /* ucb->uc_link == NULL? */
bt/s 2f
mov r8, r4 /* r4 <- ucb->uc_link */
mov.l .Lsetcontext, r1
#ifdef PIC
bsrf r1
.LPCS0:
nop
#else
mov.l .Lsetcontext, r1
jsr @r1
nop
#endif
/* If this returns (which can happen if the syscall fails) we'll exit
the program with the return error value (-1). */
2:
mov.l .Lexit, r1
#ifdef PIC