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5598473a5b
If we can't push the pending register windows onto the user's stack, we disallow signal delivery even if the signal would be delivered on a valid seperate signal stack. Add a register window save area in the signal frame, and store any unsavable windows there. On sigreturn, if any windows are still queued up in the signal frame, try to push them back onto the stack and if that fails we kill the process immediately. This allows the debug/tst-longjmp_chk2 glibc test case to pass. Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
#ifndef __SPARC_SIGCONTEXT_H
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#define __SPARC_SIGCONTEXT_H
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#ifdef __KERNEL__
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#include <asm/ptrace.h>
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#ifndef __ASSEMBLY__
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#define __SUNOS_MAXWIN 31
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/* This is what SunOS does, so shall I unless we use new 32bit signals or rt signals. */
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struct sigcontext32 {
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int sigc_onstack; /* state to restore */
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int sigc_mask; /* sigmask to restore */
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int sigc_sp; /* stack pointer */
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int sigc_pc; /* program counter */
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int sigc_npc; /* next program counter */
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int sigc_psr; /* for condition codes etc */
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int sigc_g1; /* User uses these two registers */
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int sigc_o0; /* within the trampoline code. */
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/* Now comes information regarding the users window set
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* at the time of the signal.
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*/
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int sigc_oswins; /* outstanding windows */
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/* stack ptrs for each regwin buf */
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unsigned sigc_spbuf[__SUNOS_MAXWIN];
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/* Windows to restore after signal */
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struct reg_window32 sigc_wbuf[__SUNOS_MAXWIN];
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};
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/* This is what we use for 32bit new non-rt signals. */
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typedef struct {
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struct {
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unsigned int psr;
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unsigned int pc;
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unsigned int npc;
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unsigned int y;
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unsigned int u_regs[16]; /* globals and ins */
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} si_regs;
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int si_mask;
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} __siginfo32_t;
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#define __SIGC_MAXWIN 7
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typedef struct {
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unsigned long locals[8];
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unsigned long ins[8];
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} __siginfo_reg_window;
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typedef struct {
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int wsaved;
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__siginfo_reg_window reg_window[__SIGC_MAXWIN];
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unsigned long rwbuf_stkptrs[__SIGC_MAXWIN];
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} __siginfo_rwin_t;
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#ifdef CONFIG_SPARC64
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typedef struct {
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unsigned int si_float_regs [64];
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unsigned long si_fsr;
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unsigned long si_gsr;
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unsigned long si_fprs;
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} __siginfo_fpu_t;
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/* This is what SunOS doesn't, so we have to write this alone
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and do it properly. */
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struct sigcontext {
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/* The size of this array has to match SI_MAX_SIZE from siginfo.h */
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char sigc_info[128];
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struct {
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unsigned long u_regs[16]; /* globals and ins */
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unsigned long tstate;
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unsigned long tpc;
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unsigned long tnpc;
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unsigned int y;
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unsigned int fprs;
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} sigc_regs;
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__siginfo_fpu_t * sigc_fpu_save;
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struct {
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void * ss_sp;
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int ss_flags;
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unsigned long ss_size;
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} sigc_stack;
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unsigned long sigc_mask;
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__siginfo_rwin_t * sigc_rwin_save;
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};
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#else
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typedef struct {
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unsigned long si_float_regs [32];
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unsigned long si_fsr;
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unsigned long si_fpqdepth;
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struct {
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unsigned long *insn_addr;
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unsigned long insn;
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} si_fpqueue [16];
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} __siginfo_fpu_t;
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#endif /* (CONFIG_SPARC64) */
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#endif /* !(__ASSEMBLY__) */
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#endif /* (__KERNEL__) */
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#endif /* !(__SPARC_SIGCONTEXT_H) */
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