mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-22 15:07:43 +08:00
d07d375bc4
Update the offsets used to save registers into the stejmp jmp_buf structure in order to: * Avoid writing the supervision register outside the buffer and thus clobbering something on the stack. Previously the supervision register was written at offset 124 while the buffer was of length 124. * Shrink the jmp_buf down to the size actually needed, by avoiding holes at the locations of omitted registers.
468 lines
9.3 KiB
C
468 lines
9.3 KiB
C
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_BEGIN_STD_C
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#if defined(__or1k__) || defined(__or1knd__)
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/*
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* r1, r2, r9, r14, r16 .. r30, SR.
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*/
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#define _JBLEN 13
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#define _JBTYPE unsigned long
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#endif
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#if defined(__arm__) || defined(__thumb__)
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/*
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* All callee preserved registers:
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* v1 - v7, fp, ip, sp, lr, f4, f5, f6, f7
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*/
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#define _JBLEN 23
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#endif
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#if defined(__aarch64__)
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#define _JBLEN 22
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#define _JBTYPE long long
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#endif
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#if defined(__AVR__)
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#define _JBLEN 24
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#endif
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#ifdef __sparc__
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/*
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* onsstack,sigmask,sp,pc,npc,psr,g1,o0,wbcnt (sigcontext).
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* All else recovered by under/over(flow) handling.
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*/
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#define _JBLEN 13
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#endif
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#ifdef __BFIN__
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#define _JBLEN 40
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#endif
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#ifdef __epiphany__
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/* All callee preserved registers: r4-r10,fp, sp, lr,r15, r32-r39 */
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#define _JBTYPE long long
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#define _JBLEN 10
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#endif
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/* necv70 was 9 as well. */
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#if defined(__m68k__) || defined(__mc68000__)
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/*
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* onsstack,sigmask,sp,pc,psl,d2-d7,a2-a6,
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* fp2-fp7 for 68881.
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* All else recovered by under/over(flow) handling.
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*/
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#define _JBLEN 34
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#endif
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#if defined(__mc68hc11__) || defined(__mc68hc12__) || defined(__mc68hc1x__)
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/*
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* D, X, Y are not saved.
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* Only take into account the pseudo soft registers (max 32).
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*/
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#define _JBLEN 32
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#endif
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#ifdef __nds32__
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/* 17 words for GPRs,
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1 word for $fpcfg.freg and 30 words for FPUs
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Reserved 2 words for aligement-adjustment. When storeing double-precision
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floating-point register into memory, the address has to be
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double-word-aligned.
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Check libc/machine/nds32/setjmp.S for more information. */
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#if __NDS32_EXT_FPU_SP__ || __NDS32_EXT_FPU_DP__
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#define _JBLEN 50
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#else
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#define _JBLEN 18
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#endif
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#endif
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#if defined(__Z8001__) || defined(__Z8002__)
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/* 16 regs + pc */
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#define _JBLEN 20
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#endif
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#ifdef _AM29K
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/*
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* onsstack,sigmask,sp,pc,npc,psr,g1,o0,wbcnt (sigcontext).
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* All else recovered by under/over(flow) handling.
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*/
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#define _JBLEN 9
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#endif
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#ifdef __i386__
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# if defined(__CYGWIN__) && !defined (_JBLEN)
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# define _JBLEN (13 * 4)
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# elif defined(__unix__) || defined(__rtems__)
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# define _JBLEN 9
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# elif defined(__iamcu__)
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/* Intel MCU jmp_buf only covers callee-saved registers. */
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# define _JBLEN 6
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# else
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# include "setjmp-dj.h"
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# endif
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#endif
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#ifdef __x86_64__
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# ifdef __CYGWIN__
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# define _JBTYPE long
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# define _JBLEN 32
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# else
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# define _JBTYPE long long
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# define _JBLEN 8
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# endif
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#endif
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#ifdef __i960__
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#define _JBLEN 35
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#endif
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#ifdef __M32R__
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/* Only 8 words are currently needed. 10 gives us some slop if we need
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to expand. */
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#define _JBLEN 10
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#endif
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#ifdef __mips__
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# if defined(__mips64)
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# define _JBTYPE long long
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# endif
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# ifdef __mips_soft_float
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# define _JBLEN 11
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# else
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# define _JBLEN 23
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# endif
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#endif
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#ifdef __m88000__
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#define _JBLEN 21
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#endif
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#ifdef __H8300__
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#define _JBLEN 5
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#define _JBTYPE int
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#endif
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#ifdef __H8300H__
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/* same as H8/300 but registers are twice as big */
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#define _JBLEN 5
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#define _JBTYPE long
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#endif
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#if defined (__H8300S__) || defined (__H8300SX__)
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/* same as H8/300 but registers are twice as big */
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#define _JBLEN 5
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#define _JBTYPE long
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#endif
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#ifdef __H8500__
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#define _JBLEN 4
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#endif
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#ifdef __sh__
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#if __SH5__
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#define _JBLEN 50
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#define _JBTYPE long long
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#else
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#define _JBLEN 20
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#endif /* __SH5__ */
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#endif
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#ifdef __v800
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#define _JBLEN 28
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#endif
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#ifdef __PPC__
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#ifdef __ALTIVEC__
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#define _JBLEN 64
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#else
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#define _JBLEN 32
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#endif
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#define _JBTYPE double
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#endif
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#ifdef __MICROBLAZE__
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#define _JBLEN 20
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#define _JBTYPE unsigned int
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#endif
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#ifdef __hppa__
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/* %r30, %r2-%r18, %r27, pad, %fr12-%fr15.
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Note space exists for the FP registers, but they are not
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saved. */
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#define _JBLEN 28
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#endif
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#if defined(__mn10300__) || defined(__mn10200__)
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#ifdef __AM33_2__
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#define _JBLEN 26
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#else
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/* A guess */
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#define _JBLEN 10
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#endif
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#endif
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#ifdef __v850
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/* I think our setjmp is saving 15 regs at the moment. Gives us one word
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slop if we need to expand. */
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#define _JBLEN 16
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#endif
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#if defined(_C4x)
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#define _JBLEN 10
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#endif
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#if defined(_C3x)
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#define _JBLEN 9
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#endif
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#ifdef __TMS320C6X__
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#define _JBLEN 13
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#endif
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#ifdef __TIC80__
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#define _JBLEN 13
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#endif
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#ifdef __D10V__
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#define _JBLEN 8
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#endif
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#ifdef __D30V__
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#define _JBLEN ((64 /* GPR */ + (2*2) /* ACs */ + 18 /* CRs */) / 2)
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#define _JBTYPE double
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#endif
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#ifdef __frv__
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#define _JBLEN (68/2) /* room for 68 32-bit regs */
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#define _JBTYPE double
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#endif
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#ifdef __moxie__
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#define _JBLEN 16
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#endif
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#ifdef __CRX__
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#define _JBLEN 9
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#endif
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#if (defined(__CR16__) || defined(__CR16C__) ||defined(__CR16CP__))
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/* r6, r7, r8, r9, r10, r11, r12 (r12L, r12H),
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* r13 (r13L, r13H), ra(raL, raH), sp(spL, spH) */
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#define _JBLEN 14
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#define _JBTYPE unsigned short
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#endif
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#ifdef __fr30__
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#define _JBLEN 10
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#endif
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#ifdef __FT32__
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#define _JBLEN 27
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#endif
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#ifdef __iq2000__
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#define _JBLEN 32
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#endif
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#ifdef __mcore__
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#define _JBLEN 16
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#endif
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#ifdef __arc__
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#define _JBLEN 25 /* r13-r30,blink,lp_count,lp_start,lp_end,mlo,mhi,status32 */
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#endif
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#ifdef __MMIX__
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/* Using a layout compatible with GCC's built-in. */
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#define _JBLEN 5
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#define _JBTYPE unsigned long
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#endif
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#ifdef __mt__
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#define _JBLEN 16
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#endif
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#ifdef __SPU__
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#define _JBLEN 50
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#define _JBTYPE __vector signed int
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#endif
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#ifdef __xstormy16__
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/* 4 GPRs plus SP plus PC. */
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#define _JBLEN 8
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#endif
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#ifdef __mep__
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/* 16 GPRs, pc, hi, lo */
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#define _JBLEN 19
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#endif
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#ifdef __CRIS__
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#define _JBLEN 18
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#endif
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#ifdef __ia64
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#define _JBLEN 64
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#endif
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#ifdef __lm32__
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#define _JBLEN 19
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#endif
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#ifdef __m32c__
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#if defined(__r8c_cpu__) || defined(__m16c_cpu__)
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#define _JBLEN (22/2)
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#else
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#define _JBLEN (34/2)
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#endif
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#define _JBTYPE unsigned short
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#endif /* __m32c__ */
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#ifdef __MSP430__
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#define _JBLEN 9
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#ifdef __MSP430X_LARGE__
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#define _JBTYPE unsigned long
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#else
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#define _JBTYPE unsigned short
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#endif
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#endif
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#ifdef __RL78__
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/* Three banks of registers, SP, CS, ES, PC */
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#define _JBLEN (8*3+8)
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#define _JBTYPE unsigned char
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#endif
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/*
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* There are two versions of setjmp()/longjmp():
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* 1) Compiler (gcc) built-in versions.
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* 2) Function-call versions.
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*
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* The built-in versions are used most of the time. When used, gcc replaces
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* calls to setjmp()/longjmp() with inline assembly code. The built-in
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* versions save/restore a variable number of registers.
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* _JBLEN is set to 40 to be ultra-safe with the built-in versions.
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* It only needs to be 12 for the function-call versions
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* but this data structure is used by both versions.
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*/
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#ifdef __NIOS2__
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#define _JBLEN 40
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#define _JBTYPE unsigned long
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#endif
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#ifdef __RX__
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#define _JBLEN 0x44
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#endif
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#ifdef __VISIUM__
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/* All call-saved GP registers: r11-r19,r21,r22,r23. */
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#define _JBLEN 12
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#endif
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#ifdef __riscv
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/* _JBTYPE using long long to make sure the alignment is align to 8 byte,
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otherwise in rv32imafd, store/restore FPR may mis-align. */
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#define _JBTYPE long long
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#ifdef __riscv_32e
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#define _JBLEN ((4*sizeof(long))/sizeof(long))
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#else
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#define _JBLEN ((14*sizeof(long) + 12*sizeof(double))/sizeof(long))
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#endif
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#endif
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#ifdef _JBLEN
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#ifdef _JBTYPE
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typedef _JBTYPE jmp_buf[_JBLEN];
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#else
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typedef int jmp_buf[_JBLEN];
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#endif
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#endif
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_END_STD_C
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#if (defined(__CYGWIN__) || defined(__rtems__)) && __POSIX_VISIBLE
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#include <signal.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* POSIX sigsetjmp/siglongjmp macros */
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#ifdef _JBTYPE
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typedef _JBTYPE sigjmp_buf[_JBLEN+1+((sizeof (_JBTYPE) + sizeof (sigset_t) - 1)
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/sizeof (_JBTYPE))];
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#else
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typedef int sigjmp_buf[_JBLEN+1+(sizeof (sigset_t)/sizeof (int))];
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#endif
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#define _SAVEMASK _JBLEN
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#define _SIGMASK (_JBLEN+1)
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#ifdef __CYGWIN__
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# define _CYGWIN_WORKING_SIGSETJMP
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#endif
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#ifdef _POSIX_THREADS
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#define __SIGMASK_FUNC pthread_sigmask
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#else
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#define __SIGMASK_FUNC sigprocmask
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#endif
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#ifdef __CYGWIN__
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/* Per POSIX, siglongjmp has to be implemented as function. Cygwin
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provides functions for both, siglongjmp and sigsetjmp since 2.2.0. */
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extern void siglongjmp (sigjmp_buf, int) __attribute__ ((__noreturn__));
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extern int sigsetjmp (sigjmp_buf, int);
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#endif
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#if defined(__GNUC__)
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#define sigsetjmp(env, savemask) \
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__extension__ \
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({ \
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sigjmp_buf *_sjbuf = &(env); \
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((*_sjbuf)[_SAVEMASK] = savemask,\
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__SIGMASK_FUNC (SIG_SETMASK, 0, (sigset_t *)((*_sjbuf) + _SIGMASK)),\
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setjmp (*_sjbuf)); \
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})
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#define siglongjmp(env, val) \
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__extension__ \
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({ \
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sigjmp_buf *_sjbuf = &(env); \
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((((*_sjbuf)[_SAVEMASK]) ? \
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__SIGMASK_FUNC (SIG_SETMASK, (sigset_t *)((*_sjbuf) + _SIGMASK), 0)\
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: 0), \
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longjmp (*_sjbuf, val)); \
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})
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#else /* !__GNUC__ */
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#define sigsetjmp(env, savemask) ((env)[_SAVEMASK] = savemask,\
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__SIGMASK_FUNC (SIG_SETMASK, 0, (sigset_t *) ((env) + _SIGMASK)),\
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setjmp (env))
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#define siglongjmp(env, val) ((((env)[_SAVEMASK])?\
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__SIGMASK_FUNC (SIG_SETMASK, (sigset_t *) ((env) + _SIGMASK), 0):0),\
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longjmp (env, val))
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#endif
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/* POSIX _setjmp/_longjmp, maintained for XSI compatibility. These
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are equivalent to sigsetjmp/siglongjmp when not saving the signal mask.
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New applications should use sigsetjmp/siglongjmp instead. */
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#ifdef __CYGWIN__
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extern void _longjmp (jmp_buf, int) __attribute__ ((__noreturn__));
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extern int _setjmp (jmp_buf);
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#else
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#define _setjmp(env) sigsetjmp ((env), 0)
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#define _longjmp(env, val) siglongjmp ((env), (val))
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* (__CYGWIN__ or __rtems__) and __POSIX_VISIBLE */
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