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| author | Thomas Schwinge <thomas@codesourcery.com> | 2012-06-23 12:11:13 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2012-06-23 12:11:13 +0200 |
| commit | 58f902b8d8cd47e8f4f2fcd64721a6289400422e (patch) | |
| tree | 277378f362df2bfad4fd4b8758136a69bb05b267 /sysdeps/unix/sysv/linux/sh/makecontext.S | |
| parent | 1518f58b6120289e69aeba9426eca9234cd9a200 (diff) | |
| download | glibc-58f902b8d8cd47e8f4f2fcd64721a6289400422e.tar.xz glibc-58f902b8d8cd47e8f4f2fcd64721a6289400422e.zip | |
SH: Preserve more registers for frame unwinding purposes, add CFI directives.
Diffstat (limited to 'sysdeps/unix/sysv/linux/sh/makecontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/makecontext.S | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/makecontext.S b/sysdeps/unix/sysv/linux/sh/makecontext.S index ec9ce91693..a04bc9f635 100644 --- a/sysdeps/unix/sysv/linux/sh/makecontext.S +++ b/sysdeps/unix/sysv/linux/sh/makecontext.S @@ -97,8 +97,12 @@ ENTRY(__makecontext) cfi_endproc .align 5 + cfi_startproc .Lexitcode: #ifdef PIC + mov.l r12, @-r15 + cfi_adjust_cfa_offset (4) + cfi_rel_offset (r12, 0) mova .Lgot, r0 mov.l .Lgot, r12 add r0, r12 @@ -107,6 +111,9 @@ ENTRY(__makecontext) bt/s 2f mov r8, r4 /* r4 <- ucb->uc_link */ mov.l .Lsetcontext, r1 + sts.l pr, @-r15 + cfi_adjust_cfa_offset (4) + cfi_rel_offset (pr, 0) #ifdef PIC bsrf r1 .LPCS0: @@ -115,6 +122,10 @@ ENTRY(__makecontext) jsr @r1 nop #endif + /* Restore to keep CFI/CFA balanced. */ + lds.l @r15+, pr + cfi_adjust_cfa_offset (-4) + cfi_restore (pr) /* If this returns (which can happen if the syscall fails) we'll exit the program with the return error value (-1). */ @@ -143,7 +154,6 @@ ENTRY(__makecontext) .Lexit: .long HIDDEN_JUMPTARGET(exit) #endif - cfi_startproc PSEUDO_END(__makecontext) weak_alias (__makecontext, makecontext) |