Add MIPS N64 support for libcontext
This commit is contained in:
Jiaxun Yang
Seth Hillbrand
parent
e798cbe6c7
commit
320f4b6cd9
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@ -710,3 +710,120 @@ __asm (
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);
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#endif
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#if defined(LIBCONTEXT_PLATFORM_linux_mips_n64) && defined(LIBCONTEXT_COMPILER_gcc)
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__asm (
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".text\n"
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".globl jump_fcontext\n"
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".align 2\n"
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".set noreorder\n"
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".type jump_fcontext,@function\n"
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".ent jump_fcontext\n"
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"jump_fcontext:\n"
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" # reserve space on stack\n"
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" daddiu $sp, $sp, -176\n"
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" sd $s0, 64($sp) # save S0\n"
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" sd $s1, 72($sp) # save S1\n"
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" sd $s2, 80($sp) # save S2\n"
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" sd $s3, 88($sp) # save S3\n"
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" sd $s4, 96($sp) # save S4\n"
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" sd $s5, 104($sp) # save S5\n"
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" sd $s6, 112($sp) # save S6\n"
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" sd $s7, 120($sp) # save S7\n"
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" sd $fp, 128($sp) # save FP\n"
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" sd $ra, 144($sp) # save RA\n"
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" sd $ra, 152($sp) # save RA as PC\n"
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" s.d $f24, 0($sp) # save F24\n"
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" s.d $f25, 8($sp) # save F25\n"
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" s.d $f26, 16($sp) # save F26\n"
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" s.d $f27, 24($sp) # save F27\n"
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" s.d $f28, 32($sp) # save F28\n"
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" s.d $f29, 40($sp) # save F29\n"
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" s.d $f30, 48($sp) # save F30\n"
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" s.d $f31, 56($sp) # save F31\n"
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" # store SP (pointing to old context-data) in pointer a0(first arg)\n"
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" sd $sp, 0($a0)\n"
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" # get SP (pointing to new context-data) from a1 param\n"
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" move $sp, $a1\n"
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" l.d $f24, 0($sp) # restore F24\n"
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" l.d $f25, 8($sp) # restore F25\n"
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" l.d $f26, 16($sp) # restore F26\n"
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" l.d $f27, 24($sp) # restore F27\n"
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" l.d $f28, 32($sp) # restore F28\n"
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" l.d $f29, 40($sp) # restore F29\n"
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" l.d $f30, 48($sp) # restore F30\n"
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" l.d $f31, 56($sp) # restore F31\n"
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" ld $s0, 64($sp) # restore S0\n"
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" ld $s1, 72($sp) # restore S1\n"
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" ld $s2, 80($sp) # restore S2\n"
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" ld $s3, 88($sp) # restore S3\n"
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" ld $s4, 96($sp) # restore S4\n"
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" ld $s5, 104($sp) # restore S5\n"
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" ld $s6, 112($sp) # restore S6\n"
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" ld $s7, 120($sp) # restore S7\n"
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" ld $fp, 128($sp) # restore FP\n"
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" ld $ra, 144($sp) # restore RA\n"
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" # load PC\n"
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" ld $t9, 152($sp)\n"
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" sd $a2, 160($sp)\n"
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" # adjust stack\n"
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" daddiu $sp, $sp, 176\n"
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" move $a0, $a2 # move *data from a2 to a0 as param\n"
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" move $v0, $a2 # move *data from a2 to v0 as return\n"
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" # jump to context\n"
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" jr $t9\n"
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" nop\n"
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".end jump_fcontext\n"
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".size jump_fcontext, .-jump_fcontext\n"
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".section .note.GNU-stack,\"\",%progbits\n"
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);
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#endif
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#if defined(LIBCONTEXT_PLATFORM_linux_mips_n64) && defined(LIBCONTEXT_COMPILER_gcc)
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__asm (
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".text\n"
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".globl make_fcontext\n"
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".align 2\n"
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".set noreorder\n"
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".type make_fcontext,@function\n"
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".ent make_fcontext\n"
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"make_fcontext:\n"
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"#ifdef __PIC__\n"
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".set noreorder\n"
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".cpload $t9\n"
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".set reorder\n"
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"#endif\n"
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" # shift address in A0 to lower 16 byte boundary\n"
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" li $v1, 0xfffffffffffffff0\n"
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" and $v0, $v1, $a0\n"
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" # reserve space for context-data on context-stack\n"
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" daddiu $v0, $v0, -176\n"
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" # third arg of make_fcontext() == address of context-function\n"
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" sd $a2, 152($v0)\n"
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" # save global pointer in context-data\n"
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" sd $gp, 136($v0)\n"
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" # psudo instruction compute abs address of label finish based on GP\n"
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" dla $t9, finish\n"
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" # save address of finish as return-address for context-function\n"
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" # will be entered after context-function returns\n"
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" sd $t9, 144($v0)\n"
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" jr $ra # return pointer to context-data\n"
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" nop\n"
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"finish:\n"
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" # reload our gp register (needed for la)\n"
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" daddiu $t0, $sp, -176\n"
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" ld $gp, 136($t0)\n"
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" ld $v0, 160($t0)\n"
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" # call _exit(0)\n"
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" dla $t9, _exit\n"
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" move $a0, $zero\n"
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" jr $t9\n"
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" nop\n"
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".end make_fcontext\n"
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".size make_fcontext, .-make_fcontext\n"
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".section .note.GNU-stack,\"\",%progbits\n"
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);
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#endif
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@ -39,6 +39,9 @@
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#elif __aarch64__
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#define LIBCONTEXT_PLATFORM_linux_arm64
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#define LIBCONTEXT_CALL_CONVENTION
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#elif (__mips__ && _MIPS_SIM == _ABI64)
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#define LIBCONTEXT_PLATFORM_linux_mips_n64
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#define LIBCONTEXT_CALL_CONVENTION
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#endif
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#elif defined(__MINGW32__) || defined(__MINGW64__)
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